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Journal Articles

Assessing Key Non-wood Forest Products in Kenya: Insights for Conservation and Sustainable Developments - Published 2025
: Violet Oriwo, Rose Chiteva, Meshack Muga, Mary Gichuki and Joseph Githiomi
Abstract:
Non-wood forest products (NWFP) present opportunities for diversifying livelihoods in Kenya especially in the arid and semi-arid lands. This paper examines the current status, investment opportunities, challenges, and potential mitigation measures in key non-wood forest product value chains in Kenya in relation to conservation and sustainable development. It focuses on aloe, gums and resins, dyes and tannins, indigenous fruits and, honey and bee products. The study adopted a desk-based literature review methodology, drawing on research outputs from the Kenya Forestry Research Institute (KEFRI) and other scholarly and policy-related sources. A structured value chain lens was used to examine technological, institutional, and infrastructural factors influencing the development of NWFPs. Key findings focusing on current practices, existing technologies, gaps and inefficiencies, infrastructure bottlenecks and opportunities for upgrading are presented, along with lessons learned and recommendations for improving the development of these value chains......
Training Curriculum On Production, Processing and Marketing of Forest Products - Published 2019
: Joseph Githiomi, James Kimondo, Meshack Muga, George Muthike, Nellie C. Oduor, Violet Oriwo, Rose Chiteva, Oscar Mayunzu, Collins Obonyo, Emily Kitheka, Norman Wachira, Samson Mogire, Moses Lukibisi, James Kimwemwe, Charles Gitau and Dominic Mikile
Introduction:
Forest products are broadly classified into; wood and non-wood products. Wood products include; timber, furniture, poles, posts, wood fuel, pulp, paper, wood composites, wood carvings and bamboo. Non-wood forest products (NWFPs) are goods of biological origin other than wood. Non-wood forest products include; plant gums, resins, essential oils, dyes and tannins, indigenous fruits, medicinal and pharmaceutical plant products.....
WOODFUEL RESOURCES AND THEIR UTILISATION IN MT. ELGON AND CHERANG'ANY HILLS WATER TOWERS OF KENYA - Published 2023
: Violet Oriwo, Timothy Namaswa, Joseph Githiomi and Nellie Oduor
Abstract:
This study aimed to assess the households’ woodfuel sources and their utilisation technologies in Mt. Elgon and Cherang’any Hills Water Towers in Kenya. The two ecosystems were purposively sampled based on various factors, which included diverse ecological conditions and population densities. A total of six counties out of the eleven were sampled based on homogeneity to the ecosystem. The most notable reasons for preferring certain species over others were: species availability, fast growth, good burning characteristic, provision of good timber, and ease of propagation among others. The paper concludes that most households in Mt Elgon and Cherang’any Hills water towers depend on woodfuel for their energy requirements and exotic species were the most preferred. Therefore, there is a need to domesticate national legislation to enhance sector sustainability....
Sustainable Biomass Energy Production and Utilization in Sub-Saharan Africa: A Case Study of Kenya - Published 2022
: Timothy Namaswa, Joseph Githiomi, Nellie Oduor and Emily Kitheka
Abstract:
This paper reviews biomass energy production and utilization trends, opportunities, challenges and strategies for sustainability in biomass energy sector in sub-Saharan Africa (SSA). This is because despite various benefits provided by the resource, it receives little attention in terms of policy formulation and planning to enhance adequate investments and allocation of funds. Therefore, with increasing demand rate of 3.3% over 27% of woodfuel in SSA will continue being produced unsustainably using inefficient technologies; leading to a deforestation and degradation rate of over 3.5 million ha per year. The situation is worse in some countries like Kenya where over 40% of biomass energy especially is obtained from arid and semi-arid lands (ASALs) characterized by less than 4% productivity rate due to poor regeneration and vegetation growth rates. Thus there is need to implement various strategies including adoption of improved and efficient production and utilization technologies, increase on-farm tree planting and enhanced tree out-grower systems, enactment and proper implementation of biomass energy policies, establishment of reliable biomass energy database, and recognition of biomass energy benefits to the society. These will foster integration of biomass energy into planning programmes to enhance investments in the sector and reduce biomass energy resource overexploitation....
Gender Aspects Influencing Adoption of Bioenergy Conservation Technologies, the Case Lower Eastern Kenya - Published 2022
: Emily Mumbua Kitheka, Nellie Caroline Oduor, Timothy W. Namaswa, Josephine K. Musyoki, and Joseph Githiomi (PhD)
Abstract:
This paper examines the influence of gender in adoption of biomass energy conservation in Eastern Kenya. The region suffers deforestation, environmental degradation and threatened species as result of overexploitation of tree resources for woodfuel production. The government of Kenya and development partners has developed and promoted energy conservation technologies in the region for increased access to sustainable energy resources in rural areas geared towards achievement of sustainable development goals (SDGs) relating to increased access to clean and affordable energy, the eradication of poverty and environmental sustainability, climate action as well as gender equality and the empowerment of women. Despite these efforts, adoption and continued use of improved bioenergy technologies has been low. The objective of the study was to determine gender aspects influencing adoption of biomass energy conservation technologies at household and community levels. The study was carried out in selected sub-counties of Kitui County using a survey design.....
Ethnobotany of Pokot Communities on Bamboo Species in the Dryland Areas of West Pokot County, Kenya - Published 2023
: Brexidis Mandila and Timothy Namaswa
Abstract:
Communities in dryland areas of West Pokot in Kenya rely on fragile degraded ecosystems that have led to famines, low productivity and income. Although cultivating bamboo provides solutions to part of these problems, the benefits of bamboo cultivation are species and site-specific. However, no research has established the ethnobotanical knowledge of bamboo in West Pokot, making it difficult to upscale its cultivation. The study aimed at 1) determining the level of awareness of bamboo 2) the uses of bamboo 3) factors motivating and hindering its cultivation. The study adopted an analytical cross-sectional survey research design. Simple random and purposive sampling techniques were used in selecting the study site. A Systematic random sampling technique was used in selecting households to be used in establishing local knowledge through questionnaires. Data were analysed using chi-square test of fit, chi-square test of association and cochran’s Q test of K-related samples. Results showed that farmer to farmer approach (38.9%) was the main source of information. Among the respondents, 70.6% of them were aware of bamboo out of which 67.6% were aware of its uses. The commonly identified uses were soil conservation (48.1%), shade provision (39.5%), fencing material (38.8%) and construction material (36.9%). The findings revealed that 74.1% of the respondents were willing to cultivate bamboo due to its environmental, economic and cultural....
Emerging Trends in Appropriate Kiln Designs for Small-Scale Biochar Production in Low to Middle Income Countries - Published 2023
: Timothy Namaswa, David F.R.P. Burslem and Jo Smith
Abstract:
This paper reviews information about the design and performance of existing biochar production kilns to identify areas for further research and development. The kiln designs are categorized into flame curtain kilns, drum kilns, pyrolytic top-lit-updraft cookstoves, retort kilns, masonry kilns and others. Depending on the design, reviewed kilns can attain yield efficiency of 10–46 % and produce biochar containing 26–87 % fixed carbon with a calorific value of 14–40 MJ kg ^-1. Comparison of available kiln designs is challenging as some of the data required are either unavailable or derived from experiments that use a single feedstock. However, a qualitative schematic comparison indicates that drum retort kilns are best suited for most applications in low-income settings. These designs would likely be improved to approach the theoretical maximum efficiency whilst improving the quality of biochar and reducing emission levels, by combining appropriate design features from other kilns....
Comparative Analysis of Carbon Stock and Litter Nutrient Concentration in Tropical Forests Along the Ecological Gradient in Kenya - Published 2025
: Timothy Namaswa, Brexidis Mandila, Joseph Hitimana and Judith Kananu
Abstract:
The study determined the carbon stocks and litter nutrient concentration in tropical forests along the ecological gradient in Kenya. This could help understand the potential of mitigating climate change using tropical forest ecosystems in different ecological zones, which are being affected by climate change to a level that they are becoming carbon sources instead of sinks. Stratified sampling technique was used to categorize tropical forests into rain, moist deciduous and dry zone forests depending on the average annual rainfall received. Simple random sampling technique was used to select three tropical forests in each category. Modified consistent sampling technique was used to develop 10 main 20 m × 100 m plots in each forest, with 20 2 m × 50 m sub-plots in each plot. Systematic random sampling technique was used in selecting 10 sub-plots from each main plot for inventory study. Non-destructive approach based on allometric equations using trees’ diameter at breast height (DBH), total height and species’ wood specific gravity were used in estimating tree carbon stock in each forest. Soil organic carbon (SOC) and litter nutrient concentration (total phosphorus and nitrogen) were determined in each forest based on standard laboratory procedures.....
COST-BENEFIT ANALYSIS OF AGROFORESTRY TECHNOLOGIES IN SEMI-ARID REGIONS OF WEST-POKOT COUNTY, KENYA
: B.Mandila, J. Hitimana, K. Kiplagat, E. Mengich and T. Namaswa
Abstract:
West-Pokot County, Kenya experiences harsh arid and semi-arid climatic conditions associated with high poverty indicators. To alleviate poverty, Non-Governmental Organizations initiated projects to promote agroforestry in order to increase sustainable farm forestry management for food, energy security and wealth creation. However, adoption of agroforestry technologies has been slow in these regions due to scanty information on their profitability. This study determined costs, benefits and benefit-cost ratios (B/C) of agroforestry technologies in West-Pokot with the aim of scaling up of profitable and sustainable agroforestry. Purposive sampling technique was used to select two sub-locations of the county, Lelan and Chepareria. Systematic random sampling technique was used to select 91 and 90 households respectively. Questionnaire based interviews and field observations were used in collecting data. Mann–Whitney U test was used for pair wise analysis to determine B/C ratios of agroforestry technologies in Chepareria and Lelan that were significantly different. Boundary tree planting had the highest B/C in Lelan (9.4) and Chepareria (6.88), while scattered trees on farm had the lowest B/C of 0.68 in Lelan and 1.11 in Chepareria. Mann Whitney U test indicated that the B/C ratios of agroforestry technologies in Chepareria and Lelan were significantly different (U= 210.500, P < 0.005). Boundary planting and fodder bank technologies had higher B/C in Lelan as compared to Chepareria. In conclusion, all agroforestry technologies, except scattered trees on farms in Lelan were profitable in West-Pokot as they had a B/C greater than 1.
Analysis of Socio-Economic Contribution of Prosopis juliflora to the Livelihood of Local Communities in Tana River and Garissa Counties in Kenya - Published 2022
: Elyas Hassan, Luvanda Albert, Mwalewa, Sylvia and Amina Maalim
Abstract:
This study sought to assess the socio-economic contribution of Prosopis juliflora products into the livelihood of local communities living in Tana River and Garissa Counties, Kenya. Previous studies had indicated that the potential benefits of the species have not been well captured to mitigate its impacts and promote utilization contrary to the realities on the ground. Reality check shows that most communities where the species are prevalent in northern Kenya continue to utilise it for subsistence and commercial purposes. The study targeted Tana River and Garissa Counties in Kenya where both primary and secondary data were collected. Primary data was collected using two sets of semi-structured questionnaires that were administered to 150 randomly selected households involved in the harvesting, processing and marketing of prosopis products such as charcoal. The respondents were drawnfrom twenty-two (22) Charcoal Producers Associations in the study area. Quantitative and qualitative primary data was analysed using Predictive Analysis Software. The findings show that poles/posts, fuelwood and pods were the major products harvested from P. juliflora in the study areas. Its economic benefits translate to an annual income of Ksh 1,497,120 and Ksh 240,000 from charcoal and poles per producer respectively. It was further established that charcoal production and marketing was more entrenched in Tana River County compared to Garissa due to the social-cultural differences between the local communities in the two study areas. Prosopis product market awareness among the local communities was ranked high. Therefore, the study recommends that the local Community Participatory Management Teams be strengthened towards management and utilisation of P. juliflora, awareness creation be intensified on the social and economic benefits of P. juliflora, while linking the local communities to the market and undertaking legal reforms to support the utilization of P.juliflora through research and innovations...
Charcoal Trade in Niger Product Flows and Business Models - Published 2023
: Mahamane Larwanou, Doris Mutta, Chemuku Wekesa and Anders Roos
Abstract:
Charcoal is used in Africa for household energy, and the sector involves different actors with specific business strategies. Based on theories on sustainable businessm o d e l s and livelihoods, charcoal traders in five cities in Niger were surveyed about supply chains and strategies. Most charcoal is imported from Nigeria, and smaller quantities come from Benin and Burkina Faso or domestically. Men dominate the trade. Customers value charcoal quality, tree species, packaging, and low prices. Three groups of traders and their business models were identified: small-scale retailers, large-scale retailers, and wholesalers. The charcoal trade is typically combined with trade in other products and is frequently conducted with family members or friends; laborers are employed for loading and unloading. The charcoal business provides a complementary income for the traders livelihoods. Most respondents believed that trade would increase in the future; wholesalers expected promising future business opportunities. This study concludes that improvements should focus on quality, better marketing skills, and more sustainable charcoal sourcing. Charcoal use in the Sahel region of Africa should also be studied further to enable the development of effective policies in the West African bioenergy sector. The cross-border charcoal trade creates a need for coordinated policies for a sustainable charcoal sector in the Sahel region..
Kenyan Youth Perspectives on Forests - Published 2023
: D. Gitonga, C. Wekesa, E. Kiseu, G. Kowero, D. Mutta, R. Omondi and A. Roos
Abstract:
This report presents proceedings of “AfricanYouth4Forests” project workshop held in Voi, Taita Taveta county, Kenya from 7 to 9 November 2022. The workshop was jointly organised by African Forest Forum (AFF), Swedish University of Agricultural Sciences (SLU), and Kenya Forestry Research Institute (KEFRI). It brought together 19 youths from Taita Taveta and Nairobi counties between 18-25 years of age to engage with researchers and policymakers in conversations about young people's views, visions, goals, and ideas in shaping the future governance of Kenya’s and the continent's forests. The participants identified niches for youths' engagement in forests to improve forest cover, curb climate change effects and improve livelihoods. The youth participants envisioned 'a world where young people are more involved in sustainable development by participating in the green economy.' To achieve the youths’ vision, several actions were recommended; training the youth on sustainable forest management and green entrepreneurship, developing markets for green products, establishing innovative knowledge-sharing platforms, and actively involving the youths in national and international policy processes on forests and climate change. The outcome reflected a wide range of views and ideas among the youth, and that they have the capacity and readiness to tackle the forest-related challenges towards 2030 and beyond. It is recommended that the dialogue between African forestry researchers and the youth should continue.
Effects of charcoal ban on value chains and livelihoods in Kenyan coast – Stakeholders’ perceptions - Published 2023
: Chemuku Wekesa, Doris Mutta, Mahamane Larwanou, Godwin Kowero and Anders Roos
Abstract:
Charcoal production in Africa has been seen by experts and authorities as a driver of forest degradation and deforestation; hence, governments are implementing measures to address this problem, including banning of charcoal production and trade. The effectiveness of these policies is uncertain, and stakeholders’ reactions to, and perceptions of, the regulations are unknown. This study analyzed impacts, perceptions, and feedback reactions among stakeholders after the charcoal ban was introduced in Kenya in February 2018.
The conceptual framework refers to the theories on sustainability transitions, and data was collected through key informant interviews, focus group discussions (FGDs), individual interviews, workshops, and surveys among value chain actors, organizations, and government agencies in Kwale, Taita Taveta and Mombasa counties in Kenya. Several economic, behavioral, attitudinal, and institutional consequences of the ban were identified. The policy showed characteristics of a negative feedback loop, meaning the policy may not succeed in reaching its purpose because of adverse side effects. Possible “policy mix” approaches and advancement of alternative charcoal sources such as briquettes could in the longterm, promote sustainable development of the Kenyan charcoal sector hence supporting the policy implementation.
REPORT ON PROCEEDINGS OF KENYA'S HIGH-LEVEL FORUM ON ACCESS AND BENEFIT SHARING ARISING FROM SUSTAINABLE UTILIZATION OF INDIGENOUS KNOWLEDGE AND GENETIC RESOURCES- Published 2022
: Evans Taracha, Hassan Ahmed, Ruthbelah Makhanu, Sebastian Kithare, Kavaka Mukonyi, Priscillar Mutungi, Cyrus Mageria, Gilbert Busolo, Juliana Ruto, Florence Were, Kimaren Ole Riamit and Luke Otipo Shikanga.
Introduction:
Sustainable utilization of cultural and natural resources is key to industrialization and economic growth of any country. Globally, the creative economy, which includes the creativity arising from indigenous knowledge and associated genetic resources (IKaGR), is valued at USD 2.25 trillion and accounts for about 30 million jobs dating back to 2013. Multiple forecasts predict that the creative economy could represent ten per-cent (10%) of the global Gross Domestic Product (GDP) before 2030. In this regard, deliberate and focused investments in the utilization of cultural and natural resources will generate valuable assets that will contribute to the marked growth of the national economy and increase the country's GDP.
Kenya is endowed with an abundance of natural resources including plants with high medicinal, cosmetic and nutritional value that is not fully utilized locally. In addition, Kenya's unique cultural heritage that is handed down through generations by cultural transmissions makes the country a perfect destination for archaeologists, cultural anthropologists and international tourists. Today, formal education systems have disrupted the practical everyday life aspects of indigenous knowledge and ways of learning, replacing them with abstract knowledge and academic ways of learning. Consequently, there is a grave risk of losing indigenous knowledge and, along with it, valuable knowledge about ways of living sustainably. Therefore, deliberate efforts need to be made to tap into the IKaGR of our cultural heritage and create awareness of the value of such key resources particularly their potential contribution to sustainable development.
Engaging Youth to Improve Livelihoods and the Environment Through Sustainable Forestry in Kenya - Published 2022
: Daphine Gitonga, Godwin Kowero, Doris Mutta, Chemuku Wekesa, Eva Kiseu and Anders Roos.
Introduction:
Africa is the world’s youngest continent. Africans make up 26 per cent of the world’s young population under the age of 25 and their share will increase over the century. This “youth bulge” could either become a dividend or a liability to the continent – especially in the context of climate change and the current stress on natural resources.
Highlighting their role at a workshop held from 7th to 9th November 2022, young Kenyan forestry entrepreneurs and activists had the opportunity to meet forest scientists and community leaders and share their experiences in forest-based livelihoods as well as their initiatives to respond to the challenges in sustainable management of forests. Titled “Promoting the involvement of young people in sustainable forestry and livelihoods in Kenya”, the inaugural event brought together 19 participants, aged 18-25, both from rural and urban areas of Taita Taveta and Nairobi counties, respectively for an interactive discussion on the potential role youth can play in the protection and management of forest resources to hasten green transition in Kenya. The event gave the youth a platform to find a shared vision in their action plans and gain an entry point for inclusive forest and tree-based value development.
Traditional Mountain Landscapes: Crucial for Meeting Biodiversity and Climate Targets - Published 2022
: Krystyna Swiderska, Alejandro Argumedo, Eric Chavez, Chemuku Wekesa and Yiching Song
Introduction:
Traditional mountain landscapes governed by Indigenous Peoples and local communities (IPLCs) conserve unique wildlife and agrobiodiversity, and strongly support climate change adaptation and mitigation by protecting ecosystem services, including grasslands that store almost 50% more carbon than forests. But mountain biodiversity and the Indigenous and traditional peoples that sustain it are highly vulnerable to climate change and are increasingly threatened by rising temperatures, unsustainable development, poverty and food insecurity. In the 2022 International Year of Sustainable Mountain Development and in the run-up to the fifteenth Conference of the Parties to the Convention on Biological Diversity (CBD COP15), this briefing explores the importance of traditional mountain landscapes in achieving the CBD’s post-2020 targets, the 2030 Agenda and the Paris Agreement. IPLC-governed area-based conservation measures in mountains — such as Biocultural Heritage Territories that use precolonial conservation concepts — have a critical role to play in delivering these global commitments.
The First Kenya Commercial Forestry Investment Conference and Expo - Published 2022
: Joram Kagombe, Jonah Kiprop, Anthony Macharia and Abdalla Kisiwa
Introduction:
The Kenya Forestry Research Institute (KEFRI) hosted the first Kenya Commercial Forestry Investment Conference and Expo from 23rd to 26th November 2021 at KEFRI headquarters Muguga. The theme of the conference was “Commercial Forestry Investment for Wealth Creation, Enhancing Manufacturing, Food security, Health and Attainment of 10% Tree Cover in Kenya” It was organized by a multiinstitutional team composed of public, private and development institutions such as the Ministry of Environment and Forestry (MoEF).
Corrective Interventions to End-Splitting and Surface Cracking in Kenya Grown Eucalyptus grandis Poles - Published 2022
: George Muthike, Godfrey Ali, Nellie Oduor, Paul Munene, Joseph Githiomi
Introduction:
This study determined the effect of three pole pre-drying handling techniques, on end-splitting and surface checking in Eucalyptus grandis poles from highland and low land areas in Kenya.
Eucalyptus species, mainly native to Australia, are widely grown for various uses in many countries world over. These species were introduced to the East African region during the colonial rule and to date they form a significant proportion of the tree species grown in the region. About 100 Eucalyptus species were introduced and tried in Kenya as early as 1900 with the aim of supplying wood fuel for the Kenya-Uganda railway (Oballa, 2009).
Molecular Phylogeny of Selected Kenyan Eucalyptus Species Inferred from MatK, rbcL and TrnL-F Genes and Their Suitability for Power Transmission Poles - Published 2022
: Daisy Chebet, Fredrick M. Musila, Sarah N. Kituyi, George M. Muthike and Magrate M. Kaigongi
Introduction:
Genus Eucalyptus belongs to the family Myrtaceae and consists of more than 900 species, various hybrids and varieties. The major species that are grown in Kenya are Eucalyptus grandis, E. globulus, E. saligna and E. camaldulensis. Most Eucalyptus species are highly dependent on rainfall and this is challenged by climatic changes owing to global warming making it difficult to effectively match the availability of mature trees and the market demand especially for use as power transmission poles.
The genus Eucalyptus belongs to the family Myrtaceae and comprises more than 900 species with various hybrids and varieties globally [1]. They grow in different ecological zones; hardy species grow in semi-arid areas while others grow on marshy sites and under a variety of soils including infertile sands, fertile loam soils and heavy clays [2]. Eucalyptus are plantation trees that are widely cultivated in Kenya comprising mostly species of the subgenus Symphyomyrtus [3].
Establishing a Biocultural Heritage Territory to Protect Kenya’s Kaya Forests - Published 2022
: Leila Ndalilo, Krystyna Swiderska and Chemuku Wekesa.
Introduction:
Kenya Forestry Research Institute (KEFRI) in collaboration with the International Institute of Environment and Development (IIED), and with financial support from the UK Darwin Initiative, is implementing the project ‘Establishing a Biocultural Heritage Territory to protect Kenya’s Kaya forests’ in the Rabai Mijikenda community. Rabai sub-county forms part of the Coastal Forests global biodiversity hotspot with a very high level of plant endemicity and is currently under severe threat. The project aims to promote conservation and sustainable use of biodiversity and genetic resources in four sacred Kaya forests (Bomu, Fimboni, Mudzi Muvya and Mudzi Mwiru) and across the landscape, with a particular focus on threatened endemic trees important for livelihoods, the endemic and endangered golden-rumped elephant-shrew, endemic butterflies, indigenous vegetables and traditional crops.
It aims to establish a collective Biocultural Heritage Territory governance institution which brings together Rabai’s Kaya elders and village elders and empowers Kaya elders to enforce conservation rules. It also aims to enhance capacity to generate alternative livelihoods, restore endangered trees in Kayas and on-farm, install fuel efficient stoves, and restore agroecological practices. Biocultural Heritage Territories (BCHTs) are self-governed landscapes which protect and revitalise interlinked biodiversity and cultural heritage based on traditional knowledge and customary laws. The Potato Park in the Peruvian Andes is a successful example, which conserves rich Andean crop diversity and wildlife. The project aims to adapt to this model to the Rabai context, as a pilot which can then be scaled out more widely.
Co-limitation towards lower latitudes shapes global forest diversity gradients - Published 2022
:Jingjing Liang, Javier G. P. Gamarra, Nicolas Picard, Mo Zhou, Bryan Pijanowski, Douglass F. Jacobs, Peter B. Reich, Thomas W. Crowther, Gert-Jan Nabuurs, Sergio de-Miguel, Jingyun Fang, Christopher W. Woodall, Jens-Christian Svenning, Tommaso Jucker, Jean-Francois Bastin, Susan K. Wiser, Ferry Slik, Bruno Hérault, Giorgio Alberti, Gunnar Keppel, Geerten M. Hengeveld, Pierre L. Ibisch, Carlos A. Silva, Hans ter Steege, Pablo L. Peri, David A. Coomes, Eric B. Searle, Klaus von Gadow, Bogdan Jaroszewicz, Akane O. Abbasi, Meinrad Abegg, Yves C. Adou Yao, Jesús Aguirre-Gutiérrez, Angelica M. Almeyda Zambrano, Jan Altman, Esteban Alvarez-Dávila, Juan Gabriel Álvarez-González, Luciana F. Alves, Bienvenu H. K. Amani, Christian A. Amani, Christian Ammer, Bhely Angoboy Ilondea, Clara Antón-Fernández, Valerio Avitabile, Gerardo A. Aymard, Akomian F. Azihou, Johan A. Baard, Timothy R. Baker, Radomir Balazy, Meredith L. Bastian, Rodrigue Batumike, Marijn Bauters, Hans Beeckman, Nithanel Mikael Hendrik Benu, Robert Bitariho, Pascal Boeckx, Jan Bogaert, Frans Bongers, Olivier Bouriaud, Pedro H. S. Brancalion, Susanne Brandl, Francis Q. Brearley, Jaime Briseno-Reyes, Eben N. Broadbent, Helge Bruelheide, Erwin Bulte, Ann Christine Catlin, Roberto Cazzolla Gatti, Ricardo G. César, Han Y. H. Chen, Chelsea Chisholm, Emil Cienciala, Gabriel D. Colletta, José Javier Corral-Rivas, Anibal Cuchietti, Aida Cuni-Sanchez, Javid A. Dar, Selvadurai Dayanandan, Thales de Haulleville, Mathieu Decuyper, Sylvain Delabye, Géraldine Derroire, Ben DeVries, John Diisi, Tran Van Do, Jiri Dolezal, Aurélie Dourdain, Graham P. Durrheim, Nestor Laurier Engone Obiang, Corneille E. N. Ewango, Teresa J. Eyre, Tom M. Fayle, Lethicia Flavine N. Feunang, Leena Finér, Markus Fischer, Jonas Fridman, Lorenzo Frizzera, André L. de Gasper, Damiano Gianelle, Henry B. Glick, Maria Socorro Gonzalez-Elizondo, Lev Gorenstein, Richard Habonayo, Olivier J. Hardy, David J. Harris, Andrew Hector, Andreas Hemp, Martin Herold, Annika Hillers, Wannes Hubau, Thomas Ibanez, Nobuo Imai, Gerard Imani, Andrzej M. Jagodzinski, Stepan Janecek, Vivian Kvist Johannsen, Carlos A. Joly, Blaise Jumbam, Banoho L. P. R. Kabelong, Goytom Abraha Kahsay, Viktor Karminov, Kuswata Kartawinata, Justin N. Kassi, Elizabeth Kearsley, Deborah K. Kennard, Sebastian Kepfer-Rojas, Mohammed Latif Khan, John N. Kigomo, Hyun Seok Kim, Carine Klauberg, Yannick Klomberg, Henn Korjus, Subashree Kothandaraman, Florian Kraxner, Amit Kumar, Relawan Kuswandi, Mait Lang, Michael J. Lawes, Rodrigo V. Leite, Geoffrey Lentner, Simon L. Lewis, Moses B. Libalah, Janvier Lisingo, Pablito Marcelo López-Serrano, Huicui Lu, Natalia V. Lukina, Anne Mette Lykke, Vincent Maicher, Brian S. Maitner, Eric Marcon, Andrew R. Marshall, Emanuel H. Martin, Olga Martynenko, Faustin M. Mbayu, Musingo T. E. Mbuvi, Jorge A. Meave, Cory Merow, Stanislaw Miscicki, Vanessa S. Moreno, Albert Morera, Sharif A. Mukul, Jörg C. Müller, Agustinus Murdjoko, Maria Guadalupe Nava-Miranda, Litonga Elias Ndive, Victor J. Neldner, Radovan V. Nevenic, Louis N. Nforbelie, Michael L. Ngoh, Anny E. N’Guessan, Michael R. Ngugi, Alain S. K. Ngute, Emile Narcisse N. Njila, Melanie C. Nyako, Thomas O. Ochuodho, Jacek Oleksyn, Alain Paquette, Elena I. Parfenova, Minjee Park, Marc Parren, Narayanaswamy Parthasarathy, Sebastian Pfautsch, Oliver L. Phillips, Maria T. F. Piedade, Daniel Piotto, Martina Pollastrini, Lourens Poorter, John R. Poulsen, Axel Dalberg Poulsen, Hans Pretzsch, Mirco Rodeghiero, Samir G. Rolim, Francesco Rovero, Ervan Rutishauser, Khosro Sagheb-Talebi, Purabi Saikia, Moses Nsanyi Sainge, Christian Salas-Eljatib, Antonello Salis, Peter Schall, Dmitry Schepaschenko, Michael Scherer-Lorenzen, Bernhard Schmid, Jochen Schöngart, Vladimír Šebeň, Giacomo Sellan, Federico Selvi, Josep M. Serra-Diaz, Douglas Sheil, Anatoly Z. Shvidenko, Plinio Sist, Alexandre F. Souza, Krzysztof J. Stereńczak, Martin J. P. Sullivan, Somaiah Sundarapandian, Miroslav Svoboda, Mike D. Swaine, Natalia Targhetta, Nadja Tchebakova, Liam A. Trethowan, Robert Tropek, John Tshibamba Mukendi, Peter Mbanda Umunay, Vladimir A. Usoltsev, Gaia Vaglio Laurin, Riccardo Valentini, Fernando Valladares, Fons van der Plas, Daniel José Vega-Nieva, Hans Verbeeck, Helder Viana, Alexander C. Vibrans, Simone A. Vieira, Jason Vleminckx, Catherine E. Waite, Hua-Feng Wang, Eric Katembo Wasingya, Chemuku Wekesa, Bertil Westerlund, Florian Wittmann, Verginia Wortel, Tomasz Zawiła-Niedźwiecki, Chunyu Zhang, Xiuhai Zhao, Jun Zhu, Xiao Zhu, Zhi-Xin Zhu, Irie C. Zo-Bi & Cang Hui.
Introduction:
The latitudinal diversity gradient (LDG) is one of the most recognized global patterns of species richness exhibited across a wide range of taxa. Numerous hypotheses have been proposed in the past two centuries to explain LDG, but rigorous tests of the drivers of LDGs have been limited by a lack of high-quality global species richness data. Here we produce a high-resolution (0.025° × 0.025°) map of local tree species richness using a global forest inventory database with individual tree information and local biophysical characteristics from ~1.3 million sample plots. We then quantify drivers of local tree species richness patterns across latitudes. Generally, annual mean temperature was a dominant predictor of tree species richness, which is most consistent with the metabolic theory of biodiversity (MTB).
However, MTB underestimated LDG in the tropics, where high species richness was also moderated by topographic, soil and anthropogenic factors operating at local scales. Given that local landscape variables operate synergistically with bioclimatic factors in shaping the global LDG pattern, we suggest that MTB be extended to account for co-limitation by subordinate drivers.
Indigenous Peoples’ Food Systems and Biocultural Heritage: Addressing Indigenous Priorities Using Decolonial and Interdisciplinary Research Approaches - Published 2022
:Krystyna Swiderska, Alejandro Argumedo, Chemuku Wekesa, Leila Ndalilo, Yiching Song, Ajay Rastogi and Philippa Ryan.
Introduction:
The food systems and territories of Indigenous Peoples sustain much of the world’s biodiversity, cultivated and wild, through agroecological practices rooted in Indigenous cosmovision and cultural and spiritual values. These food systems have a critical role to play in sustainability transformations but are widely threatened and have received limited research attention. This paper presents the results of four virtual workshops with Indigenous Peoples: a global workshop and local workshops with communities in coastal Kenya, northeast India and southwest China. Indigenous participants highlighted the role of their food systems in resilience to climate change, nutrition, sustainability and resilience to pandemics, and threats from agriculture, development and conservation policies. They called for research on the rapid loss of Indigenous knowledge; Indigenous Peoples’ land rights and food sovereignty; and the impacts of industrial agriculture on Indigenous food systems, stressing the need for decolonial approaches to revitalise Indigenous knowledge.
The paper presents a decolonial and interdisciplinary framework for action-research on Indigenous food systems past and present, from farm to plate, drawing on the virtual workshops, Andean decolonising methods and historical approaches. It concludes that decolonising action-research, led by Indigenous Peoples, is urgently needed to reverse the rapid loss of food-related biocultural heritage.
Livelihood Vulnerability Index: Gender Dimension to Climate Change and Variability in REDD + Piloted Sites, Cross River State, Nigeria
:Adeniyi Okanlawon Basiru, Abiodun Olusegun Oladoye, Olubusayo Omotola Adekoya, Lucas Aderemi Akomolede, Vincent Onguso Oeba, Opeyemi Oluwaseun Awodutire, Fredrick Charity and Emmanuel Kolawole Abodunrin
Introduction:
Climate change and climate variability are global phenomena that have caused serious concern to many sectors of the economy and livelihoods, predominantly rural dwellers. According to Intergovernmental Panel on Climate Change (IPCC) [1], climate change refers to “a change in the state of the climate that can be identified (using statistical tests) by changes in the mean and/or the variability of its properties, and that persists for an extended period, typically decades, or longer.
Communities all over the world encounter changes and events that impact them both positively and negatively in their lives. Africa is presumed to be more vulnerable to the risk of climate change compared to other continents...
How well do local stakeholders’ perceptions of environmental impacts of an invasive alien plant species relate to ecological data?
:Ketema Bekele, Theo EW Linders, Ren´e Eschen, Hailu Shiferaw, Jema Haji, Belaineh Legesse, Simon Choge, Sandra Eckert, Purity Rima Mbaabu, Urs Schaffner
Introduction:
Anthropogenically driven environmental changes have led to a significant degradation of ecosystems across the world, thereby negatively affecting biodiversity, ecosystem services such as water and food production and ultimately human well-being.
However, the understanding of these changes and of their underlying factors may not be uniform. Environmental change is a complex phenomenon which is exacerbated by the fact that drivers are dynamic, interact with each other and may be context-dependent in different social-ecological systems.....
The Potential Of Nature-Based Enterprises In The Arid And Semi-Arid Lands Of Kenya: Case Studies In Loima And Turkana West Sub-Counties, Turkana County
:Patrick Mwirigi, Jesse Owino, Jackline Kemboi
Introduction:
The pastoral communities in Kenya solely depend on livestock and livestock products for livelihood. This study sought to assess the potential of alternative sources of livelihood through case studies of three bio-enterprises established in Loima and Turkana west sub-counties in Turkana County.
Participatory Rural Appraisal (PRA) method was employed to determine the particular needs of the communities and suitable bio-enterprise. Purposive sampling method was used in selection of the target communities and the communities were on the entire value chain of the three bio-enterprises: pasture production, Aloe turkanensis and beekeeping production. For beekeeping, Lochor angikalalio registered 88% of hive occupancy within 30 days while Namoni-Ankaala and Naipa registered 32% and 15% respectively.....
The difficult choice - to conserve the living filters or utilizing the full potential of wetlands: Insights from the Yala swamp, Kenya
:James Odhiambo Maua, Musingo Tito E. Mbuvi, Paul Matiku, Serah Munguti, Emily Mateche, Moses Owili
Introduction:
Wetlands are very productive ecosystems and provide a lot of goods and services to wetland-dependant communities worldwide. Despite their importance in terms of ecological, biological and socio-economic roles, they remain constantly under threat and many continue to be degraded and sometimes even lost at an alarming rate due to anthropogenic reasons.
Globally, wetlands are estimated to occupy approximately 6 −10% of the earth’s surface (Maltby, 1986; Schuyt and Brander, 2004) whereas in Africa; wetlands cover about 4.7% which is approximately 1.15 million km² of Africa’s continental area.....
Charcoal value chains in Africa and their role for sustainable development, Published 2021.
:Anders Roos, Chemuku Wekesa, Doris Mutta, Mahamane Larwanou & Godwin Kowero.
Introduction:
Can the Forest Pledge support a sustainable charcoal sector in Africa? It is about understanding the big picture – and the details, write researchers from Sweden, Kenya and Niger.
The Forest Pledge of November 2 , signed by over 100 governments at COP26, aims at halting global deforestation before 2030. Similar initiatives to save the forests have been launched before, and we can this time learn from past mistakes. For Africa, the charcoal sector will have a key role to play in the outcome of the Forest Pledge due to its size and role for livelihoods. To succeed this time, the campaign must seriously involve key stakeholders, apply sound management principles and study the linkages between the state of the forests and associated value chains.....
Total Carbon Stock and Potential Carbon Sequestration Economic Value of Mukogodo Forest-Landscape Ecosystem in Drylands of Northern Kenya, Published 2021.
:Leley N., Langat D., Kisiwa A., Maina G. & Muga M.
Introduction:
Carbon sequestration is one of the important ecosystem services provided by forested landscapes. Dry forests have high potential for carbon storage. However, their potential to store and sequester carbon is poorly understood in Kenya. Moreover, past attempts to estimate carbon stock have ignored drylands ecosystem heterogeneity. This study assessed the potential of Mukogodo dryland forest-landscape in offsetting carbon dioxide through carbon sequestration and storage. Four carbon pools (above and below ground biomass, soil, dead wood and litter) were analyzed...
The main carbon pools on earth systems are atmosphere, terrestrial biosphere, ocean and Earth’s crust (Hoover & Riddle, 2020). Terrestrial ecosystems (mainly forest, soil and wetland), are the major carbon pool components on earth’s system (Beedlow et al., 2004; Lal et al., 2012; Xu et al., 2018) and largely contributes to the global carbon balance (IPCC, 2007; Hoover & Riddle, 2020). However, anthropogenic activities such as land-use change and combustion of biomass and fossil fuel are largely contributing to de-carbonization and accumulation of bio-spheric greenhouse gases (GHGs)—(Lal et al., 2012; Ciais et al., 2014; Friedlingstein et al., 2019)....
Guidelines for Establishment of Partnerships, Forest Resources and Resource User’s Boundaries in Kenya, Published 2021.
:Mogambi F., Mbuvi M.T.E. & Nahama E.
Introduction:
Participatory forest management has been globally studied and it has been argued that clearly defined boundaries for access of the community forest resources will lead to sustainable use of resources and enhanced sustainable livelihoods to the communities dependent on the forests for their survival. In contrast, however current studies indicate that while there are efforts to define spatial boundaries of resource use and the resource users within the community based forest management approaches, the definition of boundaries of resource use and resources users has proved more difficult, for instance when gathering relevant information and tools that can promote forest resource users partnerships, engaging of different stakeholders, assisting local communities to organize, preparing for negotiations meetings, procedures, rules, logistics and equity considerations, negotiating for the establishment of agreements and empowering of the local communities...
The dominant forest management approach today is premised on co-management, or collaborative management of natural resources between local communities that often rely on those resources, and the government. This model pre-assumes that co-management with local communities can lead to more sustainable and equitable resource use...
Community Use and Product Valuation of Forest Resources in Maasai Mau, Kenya, Published 2021
: Koech, C. K., Njuguna, J. W., Kiama, S. M., Maua, J. O., Kaigongi, M. M., Muganda, M. M., Nadir, S., & Kigomo, J. N.
Introduction:
Many people of a great variety of cultures and land-use practices live in or around tropical forests. Although these people are all in some way dependent on forests, they have little else in common. In recent years, however, it has become much harder for forest-dependent people to use local forests and their products, owing to deforestation, logging, population pressure or legal initiatives such as the declaration of state forests, national parks or wildlife reserves. In many countries, plans to protect forest ecosystems have failed to address the needs and knowledge of local forest-dependent communities (Kumar, Singh & Kerr, 2015). According to Isager, Theilade & Thomsen (2001) participation by local people is essential to any conservation effort. In forest conservation, participation is often associated with community forestry, which refers to forest management or management by people living close to the forest. Legal, political and cultural settings for community forestry vary widely, and the term covers a wide range of experiences and practices. Community forestry is often associated with South and Southeast Asia, but it is also common in other regions.
Forests play an important role in the livelihoods of local people in most developing countries. Local communities depend on forest resources for various products such as fuel wood, construction materials, medicine, and food. An estimated 1.6billion people depend to varying degrees on forests for their livelihoods and about 60million forest dwellers are almost fully dependent on forests. Furthermore, 350million people who live adjacent to dense forests depend on them for subsistence and income (World, 2004). It is estimated that 20-25% of rural peoples’ income is obtained from environmental resources in developing countries (Vedeld et al., 2007) and provide food reserve for use in periods of crisis or during seasonal food shortages (Langat, Maranga, Cheboiwo & Aboud, 2015). The ecological and economic significance of forest ecosystems in Kenya is widely acknowledged.
Indigenous knowledge and values: key for nature conservation , Published 2021
: Krystyna Swiderska, Alejandro Argumedo, Yiching Song, Ajay Rastogi, Nawraj Gurung, Chemuku Wekesa and Guanqi Li
Introduction:
Most of the Earth’s biodiversity is located in the territories of Indigenous Peoples — around half a billion people who collectively manage about a quarter of the world’s land. Policymakers can no longer ignore the vast body of evidence showing that the traditional knowledge and rights of Indigenous Peoples and local communities are critical for addressing the crisis of biodiversity loss. Recent research with Indigenous Peoples in Peru, Kenya, India and China shows that Indigenous values and worldviews promote balance with nature and social equity. Strengthening Indigenous knowledge and values can lead to effective, locally owned, equitable and cost-effective conservation outcomes and contribute to global development goals. However, Indigenous knowledge and values face multiple threats. In advance of the Convention on Biodiversity (CBD) COP15 in China, policymakers must fully integrate Indigenous knowledge and values across the new Global Biodiversity Framework (GBF).
The traditional knowledge (TK) and ways of life of Indigenous Peoples and local communities (IPLCs) are critical in sustaining biological and cultural diversity. A 2019 global assessment found that biodiversity is generally declining least rapidly on Indigenous lands.1 New research shows that many lands characterised as ‘natural’, ‘intact’ or ‘wild’ have long histories of human use, and that recognising traditional societies’ deep cultural connection with biodiversity is essential in resolving the crisis of biodiversity loss.2
Genetic diversity and population structure of three commercial indigenous Aloe species in selected ASALs of Kenya, Published 2019
: Asenath Adienge, Gabriel Muturi, Stanley Nadir, John Gicheru, Johnson Kinyua and Jane Ngaira
Introduction:
Kenya is known for its rich diversity of native Aloe species with 59 species being reported by [1]. The government of Kenya through the vision 2030 blue print, projects to curb food insecurity through sustainable management of dry lands and its genetic resources [2] which includes the Aloe species. The indigenous Aloe species are important non-wood plants with many economic and socio-cultural uses found in ASALs of Kenya which is home to more than 30% human population [3,4]. Due to their abundant socio-economic potential, the indigenous Aloe species in Kenya have been harvested by the local communities in the ASALs from their natural populations for many years for traditional medicinal use, cultural and aesthetic purposes [5]. The commercial exploitation of Aloe species in Kenya was first reported in the 1960s with only five species being exploited for bitter gum production i.e. A. secundiflora, A. turkanesis, A. rivae, A. calidophila and A. scabrifolia [6,7]. Climate change, unsustainable harvesting of plants and their products, introduction of exotic species and pollution has been the key to unprecedented change in biodiversity worldwide [8]. This unsustainable extraction from the wild causes threat to ecological balance and finally, may lead to complete loss of the species. This has raised concern locally and internationally on the level and impact of exploitation of wild populations and prompted a Presidential decree in 1986, banning commercial harvesting of Aloe species from their natural populations [9].
Genetic diversity is a key component to biodiversity analysis and therefore it’s important to have knowledge of the distribution, genetic diversity, environment and relations among plant varieties to recognize gene pools, identify gaps in germplasm collections and develop effective conservation and management strategies [10]. There are morphological variations in some economically important Aloe species [11]. The DNA based molecular markers are free from any environmental modulations unlike the morphological markers [12] and hence provide an important tool to determine the genetic diversity of Aloe species. The RAPD (Randomly Amplified Polymorphic DNA) and ISSR (Inter-Simple Sequence Repeat) marker systems have been widely used in genetic diversity studies of different plant species and offer alternative for studying genetic variation in Aloe species.
To address these challenges facing Aloe utilization in Kenya, this study therefore, determined the geographical distribution of the three commercial indigenous Aloe species (A. secundiflora, A. turkanensis, and A. scabrifolia) from selected areas in ASALs of Kenya to establish their distinct populations. In addition, the study evaluated the molecular characterization of the three Aloe species, using RAPDs and ISSR markers and mapped their genetic pools and structures. The output of this study was to provide important information in identifying gene pools, gaps in germplasm collections and development of effective conservation and management strategies for Aloe plants.
Operations and improvement needs in the informal charcoal sector: a participatory value stream analysis, Published 2021
: A. ROOS, D. MUTTA, M. LARWANOU, C. WEKESA and G. KOWERO.
Introduction:
More than two-thirds of households in Africa rely on wood energy for heating and cooking (IEA 2019). Charcoal is an affordable energy source for many low-income urban households and creates jobs and income along the supply chain (Khundi et al. 2011, Openshaw 2010, Schure et al. 2014, Sedano et al. 2016, Vollmer et al. 2017). However, charcoal production and use are largely based on unsustainable sourcing of wood, which in most cases lead to forest degradation (Bailis et al. 2015, Chidumayo and Gumbo 2013, Kiruki et al. 2017, Naughton-Treves et al. 2007, Ndegwa et al. 2016), and in other places to deforestation. Hence, the sector influences different Sustainable Development Goals in both positive and negative ways (UN General Assembly, 2015). Good knowledge of any supply chains’ processes and outcomes improves the understanding of its impacts on different sustainability indicators (Carter and Rogers 2008, Krajewski et al. 2019, Seuring and Müller 2008). This connection is also likely to apply to charcoal supply chains (Cerutti et al. 2015, FAO 2017: 118, Sola et al. 2017).
The charcoal sector in Africa has been characterised as informal and unsustainable, but it is of great economic importance to low-income households (Baumert et al. 2016, Jagger and Shively 2015, Schure et al. 2014, Shackleton et al. 2011, Shively et al. 2010). However, few studies have investigated the operations, lead times resources, and outcomes along the charcoal supply chain to identify opportunities for improving the sector (Doggart and Meshack 2017, FAO 2017: 118, Smith et al. 2017). Participatory approaches for analysing the charcoal supply chain are also rare, however, Zorrilla-Miras et al. (2018) applied this approach in a study on charcoal and land use in Mozambique.
Laboratory and Greenhouse Evaluation of Melia volkensii Extracts for Potency against African Sweet Potato Weevil, Cylas puncticollis, and Fall Armyworm, Spodoptera frugiperda, Published 2021
: Victor Jaoko, Clauvis Nji Tizi Taning, Simon Backx, Pierfrancesco Motti, Jackson Mulatya, Jan Vandenabeele, Titus Magomere, Florence Olubayo, Sven Mangelinckx, Stefaan P. O. Werbrouck, and Guy Smagghe.
Introduction:
Insect control products of plant origin could offer more sustainable alternatives to synthetic insecticides because they have low mammalian toxicity and low persistence in the environment [1]. The focus of our study was on Melia volkensii, a drought-tolerant, fast-growing tropical tree species that grows in semi-arid areas of East Africa that is widely used in folk medicine for the treatment of various illnesses, such as diarrhea, pain and skin rashes [2–4]. Aqueous leaf extracts of the tree are also traditionally used to control ticks and fleas [5]. M. volkensii is a suitable dryland agroforestry tree and is a source of highly praised mahogany timber and termite-resistant poles [6]. M. volkensii seed kernel extracts have shown antifeedant and growth inhibition activity against several insect pests [7–10]. Insect antifeedant compounds such as salannin, volkensin, 1-tigloyl-trichilinin, 1-cinnamoyltrichilinin and 1-acetyltrichilinin have also been isolated from M. volkensii fruits [7,11]. Findings of previous studies and indigenous knowledge on M. volkensii makes this tree an interesting candidate for exploitation as a potential source of insect control products against insect pests of economic importance in Africa. The African sweet potato weevil (SPW), Cylas puncticollis (Boheman), and fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), are major insect pests of economic importance for sweet potato and maize farming in Africa, respectively. Significant sweet potato damage and economic losses are caused by C. puncticollis which oviposit in the vines and tubers [10]. These weevils cause up to 100% yield loss [12–14], and the damage from weevils continues to increase during storage [15]. Their larvae feed and tunnel in the tubers, causing reductions in marketable yield and quality [16]. The tunneling produces terpenes which cause bad odors and bitter taste, rendering the sweet potato unpalatable and unmarketable [17]. The terpenes can affect mammalian liver and lungs [18]. The insect also infests the leaves and flower seeds [19]. Infestation occurs during the dry season when high temperatures crack the soil surface, thereby exposing the tubers. Infestation can also occur through planting vines [17]. Application of parathion and chlorpyrifos insecticides have been used in overcoming weevil infestation on sweet potato, however pesticide residues have been reported [20]. Biopesticides such as azadirachtin and spinosad have been evaluated for their efficacy against the sweet potato weevils in the laboratory, but no studies have been reported on field trials [20].
Towards a Biocultural Heritage Territory in Rabai Cultural Landscape: Exploring Mijikenda Cultural Values and Practices for Sustainable Development - Case Study for the Project ‘Indigenous Biocultural Heritage for Sustainable Development’, Published 2021
: Chemuku Wekesa, Leila Ndalilo & Krystyna Swiderska
Introduction:
Biocultural Heritage Territories (BCHTs) are mosaics of land uses, deeply linked to Indigenous knowledge systems embedded in cultural traditions. The Potato Park in Cusco, Peru is perhaps the best-known example of a BCHT, where Indigenous knowledge and practices effectively combine food production with sustainable development, biodiversity conservation and ecosystem protection.
This study was conducted as part of the ‘Indigenous Biocultural Heritage for Sustainable Development’ project (2018-2021), funded by the Sustainable Development Programme of the British Academy. The project explored how Indigenous Peoples’ worldviews, wellbeing concepts, cultural values and customary laws promote or hinder biodiversity conservation and sustainable development. Conducted with the Rabai sub-tribe of the Mijikenda Indigenous people in Kilifi County, coastal Kenya, this case study was coordinated by the Kenya Forestry Research Institute (KEFRI), working closely with the Rabai community. It examined the interconnections between culture and biodiversity, and how biocultural heritage contributes to Sustainable Development Goal 2 ‘End Hunger’. It also sought to contribute to the establishment of a collectively-governed BCHT in Rabai, and used the Potato Park’s decolonising action research approach where research is co-designed and facilitated by Indigenous community researchers.
Energy in Woody Biomass: And the Industries that are Using it, Published 2020
: Nellie Oduor, Emily Kitheka & Churchill Ogutu
Introduction:
In Kenya, biomass energy resources are derived from forests - closed forests, community woodlands, farmlands and plantations as well as agricultural and industrial residues. This accounts for about 68 per cent of all energy consumed and for 90 per cent of rural household energy needs. The main sources of biomass for cooking and heating energy are charcoal, fuelwood and agricultural waste. Various industries use biomass energy in their processing; these include tea and edible oil processors. A study in 2013 that analysed the demand and supply of wood products in Kenya indicated that firewood and charcoal supply stood at 13,654,022m³ and 7,358,717m³ while demand stood at 18,702,748m³ and 16,325,810m³ respectively. Currently, there is unmet demand for biofuels with a 60% demandsupply gap. Forecasts for a 20-year period indicate a 20% increase in supply and 21.6% increase in demand by the year 2032 which signifies a gradually increasing deficit. However, most of the wood fuel is obtained from unsustainable sources and produced and utilized in inefficient technologies/devices. This exerts pressure on natural forests. The current moratorium by the Government of Kenya (February 2018 to date), banning logging on public and community forests has further widened the biomass fuel demand gap leading to escalating prices of charcoal.
Concrete vs Wooden Poles:Effects of the Shift to Concrete Poles on Tree Growers , Published 2021
: George Muthike & Godfrey Ali
Introduction: Preservative treated Eucalyptus poles have been used for power transmission for a long time in Kenya. The demand for treated poles has kept on increasing due to the Government efforts to connect more people with electricity and this has been matched with increased investment in growing of the species on both Kenya Forest Service (KFS) plantations and private farms. This has been well back-stopped by research initiatives, which have successfully developed a variety of hybrids of E. grandis and E. camaldulensis that are site-matched for different climatic regions including dry lands. Currently, wooden transmission poles are exclusively from Eucalyptus species, mainly consumed by Kenya Power and Lightning Company (KPLC) and the Rural Electrification and Renewable Energy Corporation (REREC) with an estimated annual CONCRETE VS WOODEN POLES EFFECTS OF THE SHIFT TO CONCRETE POLES ON TREE GROWERS demand of 400,000 – 500,000 poles per year. The domestic supply of poles has been enough to fulfil the demand but the consumers have been importing about 10% of the requirement.
Value Chain Analysis for Melia Timber, Published 2020
: George Muthike (Kenya Forestry Research Service), Joseph Githiomi (Kenya Forestry Research Institute),
Abstract: This paper analyzes the value chain of Melia volkensii timber grown on farms in the South Eastern dry lands of Kenya. The “filiere” approach was used to analyze the institutional and the economic dimensions of the chain, while technical dimensions were analyzed using on-farm timber sawing systems. Six main actors; tree farmers, timber merchants, sawyers, timber yard operators, furniture makers, and end consumers were mapped. Transporters, though temporary, played intermediary roles of facilitating the linkages. A variety of combinations determined costs and gains along the chain. Some actors circumvented some links to increase revenue. Quality of trees and sawn timber were key determinants of monetary value transacted along the chain. Inadequate farmers’ skills in tree silviculture, valuation and cumbersome procedures in obtaining Government permits were also mentioned as major challenges, while timber sawyers lacked efficient sawing technology, consequently lowering income along the entire value chain. To improve the value chain, there is need to address the identified challenges through enhancing information and technology transfer to the players among other interventions.
Synthesis of the Development in Gums and Resins Sub-Sector in Kenya, Published 2020
: M.O., Muga (Kenya Forestry Research Service), B.N., Chikamai (Kenya Forestry Research Institute), V.A., Oriwo (Kenya Forestry Research Institute), F.N., Gachathi (Kenya Forestry Research Institute), S.S., Mbiru (Kenya Forestry Research Institute), A.M., Luvanda (Kenya Forestry Research Institute), L., Wekesa (Kenya Forestry Research Institute), C., Wekesa (Kenya Forestry Research Institute), S., Omondi (Kenya Forestry Research Institute), J., Lelon (Kenya Forestry Research Institute),
Abstract: Gums and resins of commercial value in Kenya include: gum arabic; myrrh; hagar; and frankincense. This paper synthesizes what has been done and achievements made in the sub-sector since 1988 as well as future prospects. The aim was to inform private and public institutions interested in the gums and resins and policy makers. The key achievements in this sub-sector included taxonomic, ecological and chemical characterization of gums and resins, characterization of soil physico-chemical properties, establishment of genetic diversity and population structure of Acacia senegal and piloting of plantation development of A. senegal. Other achievements were in resource assessment and mapping, market chain analysis, capacity building of stakeholders and feasibility studies on the potential for commercialization of the processing of the products. The potential annual production is 16,291 t and 10,134 t for gum Arabic and resins, respectively, with main markets in Europe (gum Arabic) and Asia (gum resins). Kenya’s exports are about 59 t and 2446 t for gum Arabic and resins, respectively. Incapacity to bulk enough quantities mainly collected from the wild and lack of reliable suppliers humber export. The government prepared the gums and resins regulations which was awaiting gazettement at the time of this review. From the synthesis, it is concluded that the developments made in the sub-sector have not translated into volumes marketed. More efforts therefore are necessary to stimulate and enhance volumes collected and marketed.
Priority Non-Wood Forest Products in Cherangany Hills Ecosystem, Published 2020
: C. Obonyo (Kenya Forestry Research Service), M. Muga (Gums and Resins Association) J. Kiprop (Kenya Forestry Research Institute), R. Othim (Kenya Forestry Research Institute), V. Oriwo (Kenya Forestry Research Institute), C. Ingutia (Kenya Forestry Research Institute), N. Bor (Kenya Forestry Research Institute),
Abstract: Cherang’any forest is one of Kenya’s water towers that the Kenya’s Water Tower Protection and Climate Change Mitigation and Adaptation (WaTER) programme aims at raising community appreciation of natural forest areas through the promotion of sustainable utilization of non-wood forest products (NWFPs) from the forest. This is however hindered by very scanty information on NWFPs in Ecosystem. In order to bridge the gap, the programme conducted a baseline survey of key non-wood forest products (NWFPs) of socio-economic importance in Cherang’anyforest ecosystem. The survey was done by administrating semi-structured questionnaires on 266 randomly selected respondents and conducting focused group and key-informant interviews. The data was analysed for descriptive statistics using SPSS. The survey revealed that: 98% of the respondents collected, utilized or sold NWFPs to neighbours, the NWFPs that were collected in large quantities included roots and tubers, indigenous fruits, fodder and gums and saps (annual per capita collection ranged between 19 – 80kg). Households earned up to KES 66,000 and KES 50,000 from sales of honey and other NWFPs respectively in 2016. It can therefore be concluded that NWFPs play a significant role in the day to day livelihoods of the communities living adjacent to Cherang’any ecosystem and have a potential of reducing poverty level. The earning from the NWFPs and therefore appreciation of the forest by the community can be enhanced through the sustainable commercialization of fodder, roots and tubers, indigenous fruits, gums and saps, vegetables, medicine, and honey.
Piloting Biomass Energy Audit for Energy and Environmental Conservation in Homa Bay County in Kenya, Published 2020
: E., Kitheka (Kenya Forestry Research Service), C., Ogutu (Gums and Resins Association) N., Oduor (Kenya Forestry Research Institute), C., Ingutia (Kenya Forestry Research Institute), M., Muga (Kenya Forestry Research Institute), J., Githiomi (Kenya Forestry Research Institute),
Abstract: Biomass energy meets about 70% of Kenyans national energy requirements and over 90% of rural population are depended on it. However, the traditional ways of producing and utilizing the bioenergy is inefficient and therefore unsustainable. Bioenergy consumers expecially households, institutions and local enterprises lack adequate knowledge on their consumption levels, available energy conservation technologies, alternative fuels like briquettes and areas of energy wastage. Piloting biomass energy audit was undertaken in Homa-Bay County with objectives of determining the consumption trends of the consumers, the types of fuel used, sources of the fuels, utilization technologies and identify areas of energy wastage. Semi-structured questionnaire and an energy audit tool were used to collect information from the respondents. Results showed that biomass energy is the main energy type for majority of the respondents for cooking and heating. The traditional three stone and metal cook stoves are the most preferred stoves. At household level, fuelwood is sourced from own farms and neighbouring community forests while fuelwood and charcoal for institutions and domestic use are obtained from markets. On average bioenergy takes 30% of the total domestic and institutional kitchen expenditure and this has contributed significantly towards higher energy bills in institutions and at household’s levels. The study shows that energy efficiency audit is critical for consumers to track their consumption trends and identify areas of energy wastage. The study recommends frequent energy audit, use of energy saving technologies and establishment of woodlots as strategies for energy conservation.
Extent, Distribution and Causes of Defects in Soft Wood Plantation in Kenya , Published 2020
: Muthike G. (Kenya Forestry Research Service), Karega S. (Kenya Forest Service) Githiomi J. (Kenya Forestry Research Institute),
Abstract: This paper reports on the magnitude of defects in Cupressus lusitanica and their distribution. The study analysed data collected from all forest regions where defects were identified. Results indicated that defects in sawn timber were reported in most Cupressus lusitanica (Cypress) plantations, ranging between 23% and 37%. On the average, over 91% of all the defects observed were a combination of heart rot and oemida gahani, a common pest in Cypress wood. Peculiar cases (0.4%) involving termite attack on standing trees was observed in western region. The magnitude of the defects significantly differed among different regions. Much of the damage was attributed to monkeys, particularly in Mau and central Kenya, while in Mt. Kenya and Aberdare, damage to trees were associated with buffaloes and elephants. The age of the trees had a significant influence on the magnitude of defects even within the same region. The study recommended need to develop strategies to reduce the primary causes of defects and increase the quality of raw materials available for the wood industry. Further, there is need to improve silvicultural treatment and harvest trees at optimum rotation age to avoid extended damage of the wood in case there is initial attack causing any of the defects. The study further recommends diversification of species and introduction of bamboo as an industrial material particularly in high altitude areas.
Cost-Benefit Analysis of Agroforestry Technologies in Semi-Arid Regions of West-Pokot County, Kenya , Published 2020
: B., Mandila (University of Kabianga), J., Hitimana (University of Kabianga), K., Kiplagat (University of Eldoret), E., Mengich (Kenya Forestry Research Institute), T., Namaswa (University of Eldoret)
Abstract: West-Pokot County, Kenya experiences harsh arid and semi-arid climatic conditions associated with high poverty indicators. To alleviate poverty, Non-Governmental Organizations initiated projects to promote agroforestry in order to increase sustainable farm f orestry management for food, energy security and wealth creation. However, adoption of agroforestry technologies has been slow in these regions due to scanty information on their profitability. This study determined costs, benefits and benefit-cost ratios (B/C) of agroforestry technologies in West-Pokot with the aim of scaling up of profitable and sustainable agroforestry. Purposive sampling technique was used to select two sub-locations of the county, Lelan and Chepareria. Systematic random sampling technique was used to select 91 and 90 households respectively. Questionnaire based interviews and field observations were used in collecting data. Mann–Whitney U test was used for pair wise analysis to determine B/C ratios of agroforestry technologies in Chepareria and Lelan that were significantly different. Boundary tree planting had the highest B/C in Lelan (9.4) and Chepareria (6.88), while scattered trees on farm had the lowest B/C of 0.68 in Lelan and 1.11 in Chepareria. Mann Whitney U test indicated that the B/C ratios of agroforestry technologies in Chepareria and Lelan were significantly different (U= 210.500, P < 0.005). Boundary planting and fodder bank technologies had higher B/C in Lelan as compared to Chepareria. In conclusion, all agroforestry technologies, except scattered trees on farms in Lelan were profitable in West-Pokot as they had a B/C greater than 1.
Effect of Dessication and Storage Environment on Longevity of Ehretia cymosa Thonn. Seeds
: Peter Muriithi Angaine (Kenya Forestry Research Institute), Stephen Muriithi Ndungu (Kenya Forestry Research Institute), Alice Adongo Onyango (Kenya Forestry Research Institute), Jesse O. Owino (Kenya Forestry Research Institute),
Abstract: Globally, forestry faces challenges in the availability of seeds due to limited knowledge on seed handling of various species. Forestry seeds are constantly being reviewed and classified as either recalcitrant, intermediate, or orthodox based on their storage behavior. It is essential to understand the tree seed storage behavior to maintain seed viability and thus minimize seed losses. There is scanty literature combining factors of seed moisture content (6%, 9%, 12%, 15%, and 20%), seed storage temperature (20oC, 5oC and -20oC), seed storage duration (1, 4, 9 and 12 months), and germination in different sites with varying environmental variables. Ehretia cymosa is important in the Afromontane forestry landscape as a medicinal, rehabilitation, and conservation species. This study conducted desiccation and storage studies and their influence on the viability of E. cymosa seeds. The study sought to determine the optimum conditions for the storage of Ehretia cymosa that maintains viability. This study observed that E. cymosa dried to seed moisture content of 6%, stored for 12 months at 20oC and sown in the laboratory had the highest germination performance (27.6 ± 3.18%) (p < 0.05). This confirms that E. cymosa seeds exhibit orthodox storage behavior. The authors recommend longer storage studies (>12months) to determine the actual longevity of the seeds of this species. The significance of these results would be useful for foresters and farmers that would need to use this species for various purposes.
Compartmentalized Allometric Equation for estimating volume and biomass of eucalyptus in agroforestry systems in Kenya , Published 2019-08-30
: Bor N C (Kenya Forestry Research Institute), Muchiri M N (Kenya Forestry Research Institute), Kigomo J N (Kenya Forestry Research Institute), Hyvönen P (Natural Resources Institute), Nduati P N (Kenya Forest Service), Haakana H (Natural Resources Institute), Owuor N O (University of Nairobi)
This study used a sample of forty-one Eucalyptus grandis trees ranging from 4 to 44 cm diameter at breast height (dbh). The trees were destructively sampled in Nakuru and Kiambu counties, purposely selected in agro-ecological zone II, III and IV, to collect data on the different compartments to develop compartmentalized volume and biomass models. Stem volumes for the whole tree height or to a specific diameter point from the root point were calculated by integrals of splines formed from taper curves of different diameter points. Densities of different compartments of the stem, branches, stump and roots were determined by dividing their sample disks oven dry weight (wood and bark separately) with the fresh volume of the sample disk, whereas, twigs and foliage densities were determined by dividing their sample dry weight with fresh weight. Compartment’s biomass was calculated by multiplying their volume with respective density.
Piloting Biomass energy audit for energy and environmental conservation in Homa-bay County, Kenya
: Bor N C Kitheka E (Kenya Forestry Research Institute ),Ogutu C (Gums and Resins Association ),Ingutia C (Kenya Forestry Research Institute ),Muga M (Kenya Forestry Research Institute ),Githiomi J (Kenya Forestry Research Institute )
Abstract: Biomass energy meets about 70% of Kenyans national energy requirements and over 90% of rural population are depended on it. However, the traditional ways of producing and utilizing the bioenergy is inefficient and therefore unsustainable. Bioenergy consumers expecially households, institutions and local enterprises lack adequate knowledge on their consumption levels, available energy conservation technologies, alternative fuels like briquettes and areas of energy wastage. Piloting biomass energy audit was undertaken in Homa-Bay County with objectives of determining the consumption trends of the consumers, the types of fuel used, sources of the fuels, utilization technologies and identify areas of energy wastage. Semi-structured questionnaire and an energy audit tool were used to collect information from the respondents. Results showed that biomass energy is the main energy type for majority of the respondents for cooking and heating. The traditional three stone and metal cook stoves are the most preferred stoves. At household level, fuelwood is sourced from own farms and neighbouring community forests while fuelwood and charcoal for institutions and domestic use are obtained from markets. On average bioenergy takes 30% of the total domestic and institutional kitchen expenditure and this has contributed significantly towards higher energy bills in institutions and at household’s levels. The study shows that energy efficiency audit is critical for consumers to track their consumption trends and identify areas of energy wastage. The study recommends frequent energy audit, use of energy saving technologies and establishment of woodlots as strategies for energy conservation.
On-farm tree growing opportunities and constraints in Murang’a county, Kenya
:Peter Gachie ( Kenya Forestry Research Institute ) , Jonah Kipsat ( Kenya Forestry Research Institute ), Joshua Cheboiwo ( Kenya Forestry Research Institute ), Milton Esitubi ( Kenya Forestry Research Institute ), James Mwaura ( Kenya Forestry Research Institute ), Peninah Wairimu ( Kenya Forestry Research Institute ), Miriam Gathogo (Kenya Forestry Research Institute)
Abstract: Careful and efficient collection of information on agroforestry practices at different agro-ecological zones has a great contribution to promote or to improve important agroforestry practices. This survey was conducted with the objective of identifying major reasons for on-farm tree planting, tree species preferred and prioritizing major constraints to tree planting in Murang’a County, Kenya. The survey was done on 141 selected farmer households in Murang’a North, South and East sub-counties. The data was collected using a pre-tested questionnaire and analyzed with SPSS software. The tree species most popular in all the studied sub-counties included G. robusta, C. eminii, P. americana and C. macrostachyus. These species are valued by farmers for their products including fuelwood, fruits, timber, fencing and ornamental. From the study, 30 tree uses were recorded. About 81% of respondents face various constraints in tree growing such as drought, pest attack, theft, high cost of seedlings, poor soils, animal browsing and trees competition with crops. Despite the constraints, 93% of respondents had plans to plant more trees in future, with preferred species being G. robusta, P. americana, M. indica and Eucalyptus spp. These species were preferred because of their high benefits as souces of income, timber, fuelwood, and fruits. Farmers also prefered tree species that didn’t compete with agricultural crops and potrayed faster growth. Most of the farmers with future tree planting plans preferred boundaries planting. The study findings can guide tree planting in Muranga county and other similar areas.
Land cover changes and its effects on streamflow in the Malewa River Basin, Kenya
: Cheruiyot M. K. ( WWF International ) , Gathuru G ( Kenyatta University ), Koske J ( Kenyatta University ), Soyc R Directorate of Resource Surveys and Remote Sensing
Abstract: Vegetated landscapes are transformed by both natural and human causes. This is thought to influence river flow regimes. It is argued that restored and reforested landscapes increase stream flow. However, studies done to date have been inconclusive on whether or not trees on restored or reforested landscapes increase stream flow. This study aimed to examine the effects of land cover changes on streamflow of the Malewa River Basin in Kenya. Satellite imagery based spatial change detection using ArcGIS 10.1 and ERDAS IMAGINE software was deployed to estimate the land cover changes. Based on projected land cover change data, a multiple regression technique was used to establish the relationship between land cover and streamflow. The results show that at Gauge 2GB01, area under wetland significantly predicted stream flows (b=0.134, t(488) =1.978, p=0.049), with an overall model (R2=0.018, F(3, 488)=2.976, p=0.031). Area under grassland (b=0.108, t(488)=2.325, p=0.02), shrubland (b=0.112, t(488)=1.976, p=0.049) and amount of rainfall (b=0.533, t(488)=14.048, p=0.000) combined significantly predicted stream flows. Rainfall alone significantly predicted stream flows (b=0.531, t(488)=13.885, p=0.000). Overall, the gains in forest restoration did not specifically influence streamflow except in combination with other vegetation and rainfall. There is need to increase soil cover rather than woody biomass alone in the regulation of stream flows. A systematic response to address the drivers of change in land cover is also needed.
Evaluating willingness to pay for watershed protection in Ndaka-Ini Dam, Murang’a County, Kenya
: Kagombe Joram (Kenya Forestry Research Institute), Kungu James (Kenya Forestry Research Institute), Mugendi Daniel (Kenya Forestry Research Institute), Cheboiwo Joshua (Kenya Forestry Research Institute)
Abstract: Payment for Environmental Services is an incentive based approach in natural resource management linking the suppliers and consumers of goods and services from a natural resource in a way that both parties contribute to improved delivery Nairobi City gets 80% of water supply from Ndakaini dam but few of the residents are able to link availability of clean water in their pipes to conservation of water catchments areas. The objective of the study was to find out whether users of water from Ndaka-ini dam could participate in watershed protection scheme through Payment for Water Services. The study identified factors that could influence willingness of water users to pay for the environment services. Primary and secondary data were collected based on baseline survey and qualitative research approaches, interview schedules, questionnaires and, focus group discussions. Results showed that 83% of farmers are willing to participate in scheme aimed at improving conservation. There was significant relationship between source of water and amount of money they could give but attached condition of clean and regular water. The government could make use of the findings of the study to develop a payment of environment service model for Ndakaini dam.
Viability of East African Sandalwood Seed Stored at various temperatures for two yearscan sandalwood
: Kamondo B.M ( Kenya Forestry Research Institute), Kariuki J.G ( Kenya Forestry Research Institute), Nyamongo D.O (Kenya Agricultural and Livestock Research Organisation, Genetic Resources Research Institute), Giathi G ( Kenya Forestry Research Institute), Wafula A.W ( Kenya Forestry Research Institute), G.M. Muturi
Abstract: East African Sandalwood (Osyris lanceolata) is highly valued in the manufacturing of perfumery and medicinal products, and there is need for its domestication. Seed storage behavior was determined as the information is important in planning and implementing the species planting programmes and conservation strategies. Fresh seeds and those dried to a moisture content of 7% were placed in airtight plastic vials and stored at a constant temperature of 200C, ambient temperature and in a cold room set at -200C, respectively. At 0, 3, 9, 12 and 24 months of storage, seeds were subjected to a germination test. At month zero, dried seeds had scored better in mean parameter values for germination capacity (G), mean germination time (MT) and germination value (GV) than fresh seeds. Germination capacity of seed stored fresh dropped rapidly by the third month in all the storage environments from 69 % to mean less than 16 % making it inconsequential to test for storability. Germination capacity of dried seed dropped gradually in all the storage environments.. Dried seed stored at ambient and constant temperatures registered G of over 70 % in 3 months and over 60 % at 3 to 9 months. By 24 months, the G dropped drastically to 21 % for seed stored at ambient and constant temperatures and to 29 % for seed stored in cold room. There was significant difference in G, GV and MT (p < 0.01) depending on the period of storage. The results indicate that sandalwood seed is neither a classical recalcitrant nor orthodox and may be classified as having intermediate seed storage behaviour but withstanding drying to low moisture content.
Indigenous traditional knowledge on landscapes, biodiversity use in Mt. Elgon Forest Ecosystem and implication for conservation
: Langat D ( Kenya Forestry Research Institute), Khalwale T ( Kenya Forestry Research, Lake Victoria Eco-Region Research Programme), Kisiwa A (Kenya Forestry Research Institute), Ongugo P (Kenya Forestry Research Institute)
Abstract: The integrity of the forest ecosystem is shaped by communities’ uses, traditional knowledge, and practices. Because community participation is critical in the management of conservation areas, it is essential that resource managers and policymakers understand local traditional knowledge, biodiversity use to inform appropriate interventions. This study was undertaken to document traditional indigenous knowledge on landscapes, biodiversity uses, and their impacts. It formed part of a wider study meant to develop forest restoration efforts to enhance the flow of ecosystems services and livelihoods of local communities in the Mt. Elgon forest ecosystem. The study used Participatory Rural Appraisal (PRA) techniques to capture traditional indigenous knowledge on landscapes, forest biodiversity uses, and their importance to local livelihoods. Types of landscapes and biodiversity uses were free listed and importance value assessed using the weighted ranking method. Twelve landscapes were identified as important to local people and their associated faunal and floral species. Fifteen plant and ten animal species were ranked in order of importance to local communities. These forest biodiversity resources provide human health, shelter, cultural and spiritual wellbeing, and cash income. This study has shown that forest biodiversity is important to the local livelihoods and local people have wealth of traditional knowledge on forest biodiversity, uses, and management practices. Although traditional knowledge is gradually declining because of socioeconomic and cultural change; it is imperative to integrate some of this knowledge in forest management.
Community perception of ecosystem services and management implications of three forests in Western part of Kenya
: Kisiwa A (Kenya Forestry Research Institute, Langat K (Kenya Forestry Research Institute), Gatama S Kenya Forestry Research Institute), Okoth S (Kenya Forestry Research Institute), Kiprop J (Kenya Forestry Research Institute), Cheboiwo J (Kenya Forestry Research Institute), Kagombe J (Kenya Forestry Research Institute)
Abstract: Understanding local community perceptions of forest Ecosystem Services (ES) is critical in crafting viable conservation strategies or management plans sensitive to livelihoods of the local people. This is because One major driver of forest degradation is lack of appreciation of ecosystem values and low perception of forest ecosystems by diversity of stakeholders. Current conservation discourse recognizes the integration of local views and perception of forest Ecosystem Services (ES). This study investigated forest ES their importance to local communities, threats and current and future flow in Mau, Cherangany and Mt. Elgon forest ecosystems. The study collected data using Participatory Rural Appraisal methods to identify the ES. The identified forest ES were ranked in a participatory exercises using weighted ranking method (Pebble Distribution Method (PDM). Twenty-five ES were identified Water provision ranked the highest with importance value of between 15 % - 24 % in the 3 ecosystems. Water was also identified as the only ES that will remain important today, and 10 years to come. Main threats were identified as demand for wood products, encroachment and overgrazing. However, future importance value of the ES linked to this threats is predicted to reduce. This paper clearly demonstrates the high value of provisioning services by local communities relative to the other ES categories, which is critical in influencing the behavior of the local people and in enabling incorporation of local values in management plans and policies.
Cost-benefit analysis of agroforestry technologies in semi-arid regions of West-Pokot county, Kenya
: Mandila B (University of Kabianga), Hitimana J (University of Kabianga), (Kiplagat K University of Eldoret), Mengich E ( Kenya Forestry Research Institute), Namaswa T (University of Eldoret)
Abstract: West-Pokot County, Kenya experiences harsh arid and semi-arid climatic conditions associated with high poverty indicators. To alleviate poverty, NonGovernmental Organizations initiated projects to promote agroforestry in order to increase sustainable farm forestry management for food, energy security and wealth creation. However, adoption of agroforestry technologies has been slow in these regions due to scanty information on their profitability. This study determined costs, benefits and benefit-cost ratios (B/C) of agroforestry technologies in West-Pokot with the aim of scaling up of profitable and sustainable agroforestry. Purposive sampling technique was used to select two sub-locations of the county, Lelan and Chepareria. Systematic random sampling technique was used to select 91 and 90 households respectively. Questionnaire based interviews and field observations were used in collecting data. Mann–Whitney U test was used for pair wise analysis to determine B/C ratios of agroforestry technologies in Chepareria and Lelan that were significantly different. Boundary tree planting had the highest B/C in Lelan (9.4) and Chepareria (6.88), while scattered trees on farm had the lowest B/C of 0.68 in Lelan and 1.11 in Chepareria. Mann Whitney U test indicated that the B/C ratios of agroforestry technologies in Chepareria and Lelan were significantly different (U= 210.500, P < 0.005). Boundary planting and fodder bank technologies had higher B/C in Lelan as compared to Chepareria. In conclusion, all agroforestry technologies, except scattered trees on farms in Lelan were profitable in West-Pokot as they had a B/C greater than 1.
Optimization of piperine extraction from black pepper (piper nigrum) using different solvents for control of bedbugs
: Matena H G (Dedan Kimathi University of Technology), Kariuki N Z (Dedan Kimathi University of Technology), Ongarora B G (Dedan Kimathi University of Technology)
Abstract: Synthetic insecticides are known to cause negative environmental impact, an outcome which has led to increased reaseach activity on natural bioresources as possible substitutes. The objective of this study was to determine the efficacy of piperine in controlling bedbugs. Black pepper (Piper nigrum L.) and all the reagents were obtained from commercial sources and used without further purification. The optimal conditions for piperine extraction and its efficacy as an insecticide were investigated. Piperine (C17H19NO3) was extracted using Soxhlet extraction method and its properties determined. Ethanol (C2H5OH) gave the highest yield of piperine compared to dichloromethane (CH2Cl2). Due to low water-solubility of piperine, different solvent mixtures were used to improve solubility. Toxicity against bedbugs (Cimex lectularius) was carried out and the optimum concentration determined to be 1.4 g L-1 of piperine in an aliquot of ethanol/ water (v/v 1:4). At this concentration, both mature and young bedbugs took approximately 300-minute post-exposure to die. The extract was also 100% effective in inhibiting hatching of bedbug eggs while 83.4 % the unsprayed eggs hatched within seven days. Piperine can, therefore, serve as an insecticide against bedbugs since it is effective on all developmental stages of the bugs.
Synthesis of the development in gums and resins sub-sector in Kenya
: Muga M O (Kenya Forestry Research Institute), Chikamai B N (Kenya Forestry Research Institute), Oriwo V A (Kenya Forestry Research Institute), Gachathi F N (Kenya Forestry Research Institute), Mbiru S S (Kenya Forestry Research Institute), Luvanda A M (Kenya Forestry Research Institute), Wekesa L (Kenya Forestry Research Institute), Wekesa C (Kenya Forestry Research Institute), Omondi S (Kenya Forestry Research Institute), Lelon J (Kenya Forestry Research Institute)
Abstract: Gums and resins of commercial value in Kenya include: gum arabic; myrrh; hagar; and frankincense. This paper synthesizes what has been done and achievements made in the sub-sector since 1988 as well as future prospects. The aim was to inform private and public institutions interested in the gums and resins and policy makers. The key achievements in this sub-sector included taxonomic, ecological and chemical characterization of gums and resins, characterization of soil physico-chemical properties, establishment of genetic diversity and population structure of Acacia senegal and piloting of plantation development of A. senegal. Other achievements were in resource assessment and mapping, market chain analysis, capacity building of stakeholders and feasibility studies on the potential for commercialization of the processing of the products. The potential annual production is 16,291 t and 10,134 t for gum Arabic and resins, respectively, with main markets in Europe (gum Arabic) and Asia (gum resins). Kenya’s exports are about 59 t and 2446 t for gum Arabic and resins, respectively. Incapacity to bulk enough quantities mainly collected from the wild and lack of reliable suppliers humber export. The government prepared the gums and resins regulations which was awaiting gazettement at the time of this review. From the synthesis, it is concluded that the developments made in the sub-sector have not translated into volumes marketed. More efforts therefore are necessary to stimulate and enhance volumes collected and marketed.
Defects in Plantation Soft Wood in Kenya: Causes, Extent and distribution
: Muthike G (Kenya Forestry Research Institute), Karega S (Kenya Forest Service), Githiomi J (Kenya Forestry Research Institute)
Abstract: This paper reports on the magnitude of defects in Cupressus lusitanica and their distribution. The study analysed data collected from all forest regions where defects were identified. Results indicated that defects in sawn timber were reported in most Cupressus lusitanica (Cypress) plantations, ranging between 23 and 37%. On the average, over 91 % of all the defects observed were a combination of heart rot and oemida gahani, a common pest in Cypress wood. Peculiar cases (0.4%) involving termite attack on standing trees was observed in western region. The magnitude of the defects significantly differed among different regions. Much of the damage was attributed to monkeys, particularly in Mau and central Kenya, while in Mt. Kenya and Aberdare, damage to trees were associated with buffaloes and elephants. The age of the trees had a significant influence on the magnitude of defects even within the same region. The study recommended need to develop strategies to reduce the primary causes of defects and increase the quality of raw materials available for the wood industry. Further, there is need to improve silvicultural treatment and harvest trees at optimum rotation age to avoid extended damage of the wood in case there is initial attack causing any of the defects. The study further recommends diversification of species and introduction of bamboo as an industrial material particularly in high altitude areas.
The Potential of casuarina equisetifolia and melia volkensii tree species in improving soil fertility in Kwale and Kilifi Counties, Kenya
: Mwadalu Riziki (Kenya Forestry Research Institute), Mary Gathara (Kenya Forestry Research Institute), Muturi Gabriel (Kenya Forestry Research Institute), Musingo T.E Mbuvi (Kenya Forestry Research Institute)
Abstract: Low soil fertility is a major biophysical root-cause of declining per capita land productivity in Kenya. In most parts of the country, soils are deficient in nitrogen, phosphorus and in some cases potassium. Trees are important in soil fertility enhancement as they offer an excellent opportunity for farmers to meet nutrient demand in agricultural systems. The aim of the study was to determine the potential of Casuarina equisetifolia and Melia volkensii tree species on soil fertility improvement in Kwale and Kilifi Counties, Kenya. The experiment was established on-farm in a randomized complete block design (RCBD) with three treatments: Casuarina, Melia and control with eight replicates arranged in 20 x 20 m tree plots. Soil samples were obtained in 2013, 2014, 2015 and 2016 from depths of 0 to 20 cm, 20 to 40 cm and 40 to 60 cm and analyzed for soil pH, Electro Conductivity; soil Carbon (C), total nitrogen (N), available phosphorus (P) and Potassium (K), Data was subjected to Analysis of Variance using R version 4.0.2 for windows. Results indicated that total N and P were higher in C. equisetifolia and M. volkensii plots compared to the control treatment; and total Carbon was higher in M. volkensii treatment. There was a gradual decline soil C across the assessment period which could be attributed to higher decomposition rates at the study sites. There was also a positive relationship between soil pH and soil P (r2=0.128, 0.345, 0.327 for 2014, 2015 and 2016 respectively). The results indicated that C. equisetifolia and M. volkensii slightly enhanced soil fertility through increased N and P, which can be attributed to nitrogen fixation by C. equisetifolia through Frankia bacteria and nutrient recycling by M. volkensii. The findings from this study can be by researchers and extension officers for advising farmers engaged in C. equisetifolia and M. volkensii farming and for promotion of agroforestry using these tree species.
Evidence of genetic diversity and taxonomic differentiation among Acacia Senegal populations are varieties in Kenya on randomly amplified polymorphic DNA molecular markers
: Omondi F Stephen (Kenya Forestry Research Institute)
Abstract: Acacia senegal is a multipurpose tree species that forms an essential component of many farming systems in Sub-Saharan Africa where it is commercially exploited for gum arabic production. However, the species is yet to be put to optimal production in some countries due to inadequate information on its population genetics and taxonomic delimitation. This study reports the use of 13 randomly amplified polymorphic DNA (RAPD) markers to determine genetic diversity and taxonomic relationships among 12 natural populations of A. senegal in Kenya. High genetic diversity was found for all populations. Mean gene diversity (He) for all populations was at 0.288 with effective number of alleles per locus (Ne) of 1.496. Analysis of molecular variance (AMOVA) revealed most genetic variations residing within (60%) rather than among populations. However, significant differentiation was detected among populations (ɸst = 0.130; P < 0.001). Cluster analysis based on similarity coefficient delimited three main groups corresponding to the three putative varieties of A. senegal namely senegal, kerensis and leiorhachis. The RAPD technology suggested high genetic.
Status and growth determinants of non-timber forest products firms in Kenya
: Wekesa L (Kenya Forestry Research Institute), Maalu J (University of Nairobi), Gathungu J (University of Nairobi), Wainaina G (University of Nairobi)
Abstract: The nature and state of non-timber forest products small and medium enterprises and what drives their growth in Kenya is not fully understood. Studies done have not adequately described the firms and demonstrated what influence their growth. Thus, this study performed descriptive and inferential statistical analyses to characterize and establish growth determinants of the firms. The study was conducted as a cross-sectional survey with questionnaire administered to entrepreneurs of 314 firms dealing with non-timber forest products selected using stratified random sampling methods from nine representative counties of Kenya. Factors assessed included characteristics of: the firm (age, products handled, size and legal status); and entrepreneurs/ owners (age, gender, education, experience, managerial and social skills). Frequency counts and percent were used in characterizing respondent firms whereas regression analysis was applied to establish growth determinants. It was observed that most firms were relatively new in operation, small in size with less than 10 employees, operated as sole proprietorship ventures and dealt with fruit based products. Most entrepreneurs were well educated young adults but had no requisite managerial and social skills, and industry experience. Nature of products and legal status (firm characteristics), and entrepreneur’s age and education (entrepreneur characteristics) influenced firm growth. It was concluded that entrepreneurship in non-timber forest products was in nascent stages of growth run with entrepreneurs without requisite qualifications necessary for creating competitiveness and growth of the industry. There was need, therefore for the firms to enhance their capacities through appropriate staff recruitment and/or training. Additionally, firm registration especially incorporating partnerships and limited companies be encouraged and supported.
From the wild to markets and farmlands: Plant species in Biotrade
: Lusweti A (National Museums of Kenya), Khayota B ( National Museums of Kenya), Masiga A (International Centre Insect Physiology and Eocology), Kyalo S (Kenya Wildlife Service), Otieno J (MUHAS), Mwangombe J (Kenya Forest Service), Gravendeel B (Naturalist Biodiversity Center and Institute of Biology Leiden-IBL)
Abstract: Wild collection of plant products mainly served subsistence needs but is now increasingly becoming an income generating activity. The needs include food, gums, tubers, fibers, materials for construction and herbal medicine among others. This niche market, part of biotrade in Kenya and is sometimes viewed as crime against wild plants because it is undocumented, largely unregulated and economically unaccounted for. Market surveys were carried out in towns in 8 Kenyan counties served by ports of entry/exit, bordering Uganda and Tanzania. Plant species in trade, products, volumes, sources, market players and associated challenges were documented. The results indicate widespread trade in plants locally, regionally or internationally. More than 100 flowering plant species were documented in trade in Kenyan markets, mainly wild-sourced for various uses. Most are sourced from forest reserves, communal land and small holder farms. This trade is dominated by the male gender, p-value: 0.000128 and product knowledge derives heavily from indigenous knowledge. The average number of species per stall was 28 species, with a mode of 10. The value of the K-S test statistic (D) is .32207 and as it is < .00001, this data is not normally distributed. Skewness: 2.525802 and Kurtosis: 6.846425 values indicate preference of certain species over others and that some species are collected and traded more frequently compared to others. Some 22 species frequently in trade, were identified, profiled and prioritized for conservation. Strategies are needed to sustain supply of the species in trade, hence domestication, farm forestry and restoration on communal land and natural forests are proposed.
Anthropogenic influences on species composition and diversity dryland forest fragments Kitui, Eastern Kenya
: Musau J M (Karatina University, School of Environmental Studies and Natural Resources Management), Mugo M J (Karatina University, School of Environmental Studies and Natural Resources Management)
Abstract: Increase in human population has devastating effects on many dryland forest fragments in Eastern Kenya. The objectives of this paper are to determine (i) key human activities in Kitui dryland forest fragments, (ii) tree species composition and (iii) impact of human activities on tree species composition and diversity. Two belt transect of 20 m wide and 500 m long that employed use of nested sample plots of 20 m ×20 m, sub-plots of 10 m ×10 m and micro-plots of 2 m ×5 m were established in each forest. Human activities occurred in both forests but with high frequency (P < 0.05) in Museve. Introduction of exotic species boosted species composition in Museve forest recording 68 species compared to Mutuluni with 57 species. However, it altered species dominances in Museve with Eucalyptus saligna (SIV=16.77%), an exotic species being most dominant and reduced species similarity (JIA=0.37) across the two forests. Tree cutting reduced (P < 0.05) species richness and diversity in Museve which recorded lower Shannon Diversity Index( H’=1.46) compared toMutuluni(H’=1.50). Thus, this study concludes that human activities affected species composition in both forests with Museve forest most disturbed. It thus recommends improved conservation measures for both forest reserves with most attention on Museve and further research on consequences of altering species dominance by Eucalyptus saligna in Museve forest.
Priority non-wood forest products in Cherang’any hills Ecosystem
: Obonyo C (Kenya Forestry Research Institute), Muga M (Kenya Forestry Research Institute), Kiprop J (Kenya Forestry Research Institute), Othim R (Kenya Forestry Research Institute), Oriwo V (National Forestry Research Institute), Ingutia C (Kenya Forestry Research Institute), Bor N (Kenya Forestry Research Institute)
Abstract: Cherang’any forest is one of Kenya’s water towers that the Kenya’s Water Tower Protection and Climate Change Mitigation and Adaptation (WaTER) programme aims at raising community appreciation of natural forest areas through the promotion of sustainable utilization of non-wood forest products (NWFPs) from the forest. This is however hindered by very scanty information on NWFPs in Ecosystem. In order to bridge the gap, the programme conducted a baseline survey of key non-wood forest products (NWFPs) of socio-economic importance in Cherang’anyforest ecosystem. The survey was done by administrating semi-structured questionnaires on 266 randomly selected respondents and conducting focused group and key-informant interviews. The data was analysed for descriptive statistics using SPSS. The survey revealed that: 98% of the respondents collected, utilized or sold NWFPs to neighbours, the NWFPs that were collected in large quantities included roots and tubers, indigenous fruits, fodder andgums and saps (annual per capita collection ranged between 19 – 80 Kg). Households earned up to KES 66,000 and KES 50,000 from sales of honey and other NWFPs respectively in 2016. It can therefore be concluded that NWFPs play a significant role in the day to day livelihoods of the communities living adjacent to Cherang’anyecosystem and have a potential of reducing poverty level. The earning from the NWFPs and therefore appreciation of the forest by the community can be enhanced through the sustainable commercialization of fodder, roots and tubers, indigenous fruits, gums and saps, vegetables, medicine, and honey.
The Value of Forest Ecosystem Services of Mau Compalex, Cherangang and Mt. Elgon, Kenya
: Langat D (Kenya Forestry Research Institute), Cheboiwo J (Kenya Forestry Research Institute), Okoth S (Kenya Forestry Research Institute), Kiprop J (Kenya Forestry Research Institute), Kisiwa A (Kenya Forestry Research Institute), Guzha A (Center for International Forest Research), Smith N (United States Forest Service –International Programs), DeMeo T (United States Forest Service –International Programs), Kagombe J (Kenya Forestry Research Institute), Gatama S (Kenya Forestry Research Institute)
Abstract: Ecosystem services from Kenya’s forests have remained largely unmeasured and undervalued. Consequently, the benefits they provide are ignored in most forest management investment decisions. This has led to degradation and conversion of these forest ecosytems to alternative uses. This study was undertaken to value ecosystem services provided by the Mau, Cherangany hills and Mt. Elgon forest ecosystems. Primary data was collected from 1206 households and 148 forest product industry players using structured and semi- structured interviews. Secondary information was obtained from service providers, other published/ unpublished sources and from discussions with experts. Market prices, Contingent valuation, Cost-based and Benefit Transfer (BT) techniques were applied in estimating total economic values. Total Economic Value of the three ecosystems is about KES 339 billion (US$ 3.4 billion) per annum. Mau, Cherangany and Mt. Elgon ecosystems contributedKES 184 billion (US$ 1.84 billion), KES 42 billion (US$ 420million) and KES 115 billlion (US$1.15billion) respectively. In the three water towers, regulating services contributed the bulk of Total Economic Value (TEV) with 84 % (Mau), 66 % (Cherangany) and 93 % 9Mt Kenya) underscoring the importance of indirect use values in forest ecosystems. Mau forest ecosystem had the highest regulation value of KES 162 billion followed by Mt. Elgon with KES 109 billion per annum and Cherangany at KES 30.6 billion per annum. Provisioning services contributed 10%, 23% and 4 % of TEV for Mau, Cherangany and Mt. Elgon respectively. The TEV estimate from this study is very conservative because it did not encompass of all ecosystem service values. However, this study has provided vital that can assist conservation and management of the three water towers for enhanced livelihood and flow of ecosystem services.
Sustainable Business Models for Informal Charcoal Producers in Kenya
: Mutta, D.; Mahamane, L.;Wekesa, C.; Kowero, G.; Roos, A. Sustainable Business Models for Informal Charcoal Producers in Kenya. Sustainability 2021, 13, 3475.https://doi.org/10.3390/su13063475 .
Abstract: The sustainable business model (SBM) concept requires enterprises to integrate sustainability aspects in their planning and operations. Although 60% of the global working population make their living in the informal sector mostly in low-and middle income countries, the potential for SBMs has rarely been analyzed for this category
Variations in forest structure, tree species diversity and above-ground biomass in edges to interior cores of fragmented forest patches of Taita Hills, Kenya
C. Wekesaa, B.K. Kiruib, E.K. Marangab, G.M. Muturic Elsevier Journal Forest Ecology and Management 440 (2019) 48–60 .
Abstract: Comparative studies were undertaken in five forest fragments (Chawia, Fururu, Mbololo, Ngangao and Vuria) of varying sizes in Taita Hills, Kenya to determine the effects of forest edge on the forest structure, species diversity and richness and above-ground carbon stock along a forest edge-interior gradient, and the relationship between pioneer and late successional tree species.
Institutional linkages and landscape governance systems: the case of Mt. Marsabit, Kenya
Lance W. Robinson and Joram K. Kagombe Ecology and Society 23(1):27
Abstract The desire to overcome fragmented management of the natural ecosystems on which human beings depend has contributed to a growing interest in landscape approaches and to deeper questions about landscape governance systems.
Role of Devolved Governance in Enhancing Incentives in Participatory Forest Management in Kenya
Joram K. Kagombe, MTE Mbuvi & Joshua K. Cheboiwo Journal of Environment and Earth Science. Vol.7, No.2, 2017. Pg 12-17.
Abstract Natural resource management in East Africa has been centrally managed for a long period. However, recent initiation of decentralized system has been erratic and it is only recently, it has been undertaken systematically with supporting legislation and political will.
Payment for Environmental Services: Status and Opportunities in Kenya
Joram K. Kagombe, Joshua K. Cheboiwo, Alfred Gichu, Collins Handa & Jane Wamboi
Journal of Resources Development and Management. Vol.40, 2018. Abstract Payment for Ecosystem Service (PES) is a market driven tool to motivate upstream land owners to practices land uses that enhance water quantity flows through compensation incentive packages supported by downstream beneficiaries and partners.
Evaluating the Willingness to Pay for Watershed Protection in Ndaka-ini Dam, Muranga County, Kenya
Joram Kimenju Kagombe, Prof. James Kungu, Prof Daniel Mugendi & Joshua Kiplongei Cheboiwo
Civil and Environmental Research. Vol.10, No.1, 2018 Abstract Payment for Ecosystem Service (PES) has become a handy tool for promotion of sustainable watershed management across the globe due its versatility and capacity to engage multiple stakeholders in the public and private sectors.
Review of the Wood Industry in Kenya; Technology Development, Challenges and Opportunities
George Muthike, Joseph Githiomi.
International Journal of Research Studies in Agricultural Sciences, Volume 3, Issue 10, 2017, PP 45-52 Abstract Kenya forest sector is vibrant, undergoing a number of remarkable changes. It is estimated that the forestry sector contributes approximately 3.6% of the country’s gross domestic product (GDP).
First report of Teratosphaeria gauchensis causing stem canker of Eucalyptus in Kenya
Machua,J., Jimu,L., Njuguna,J.,Wingfield, M. J., Mwenje, E. & Roux, J. 2016, Forest Pathology
Abstract Teratosphaeria stem canker is an important disease of Eucalyptus species in many parts of the world where these trees are intensively propagated in plantations. Symptoms similar to those of Teratosphaeria stem canker.
Capability Map For Growing High Value Tree Species In The Coast Region of Kenya
KEFRI, 2016. Journal of Resources Development and Management. Vol.40, 2018. Abstract Payment for Ecosystem Service (PES) is a market driven tool to motivate upstream land owners to practices land uses that enhance water quantity flows through compensation incentive packages supported by downstream beneficiaries and partners.
Abstract The tree species capability map for the Coast Region is aimed at contributing to national development goals of meeting the 10% forest cover.
A Field Guide To Valuable Trees And Shrubs of Kaya Mudzi Muvya Forest In Kilifi County, Kenya
Francis Gachathi, Musingo T.E. Mbuvi, Linus Wekesa, Chemuku Wekesa & Nereoh Leley
,KEFRI, 2016. Abstract Kayas are remnant forest patches mainly found on the lowland hills along the Kenyan Coast that are considered sacred by the Mijikenda community.
Effects of Forest Disturbance on Vegetation Structure and Above-Ground Carbon in Three Isolated Forest Patches of Taita Hills
Chemuku Wekesa, Nereoh Leley, Elias Maranga, Bernard Kirui, Gabriel Muturi, Musingo Mbuvi, Ben Chikamai,
Open Journal of Forestry, 2016, 6, 142-161. ,KEFRI, 2016. Abstract Kayas are remnant forest patches mainly found on the lowland hills along the Kenyan Coast that are considered sacred by the Mijikenda community. Abstract The structure and species composition of undisturbed natural forests serve as benchmarks for understanding forest carbon storage potential for reduced carbon emissions.
Smallholder Innovation for Resilience(SIFOR): Watamu, Kilifi County, Kenya Coast 12–16 October 2015
C. Wekesa, N. Leley, L. Ndalilo, A. Amur, S. Uchi and K. Swiderska
,IIED 2016 Abstract The Smallholder Innovation for Resilience (SIFOR) project aims to strengthen biocultural innovation for food security in the face of climate change in China, India, Kenya and Peru.
Cherangani Hills Forest Strategic Ecosystem Management Plan 2015 - 2040

Abstract: The Cherangani Forest Ecosystem is a major water shed that supports the livelihoods of many communities locally and within the Lake Victoria and Lake Turkana basins.
North and South Nandi Forests Strategic Ecosystem Management Plan 2015 - 2040

Abstract: The North and South Nandi Forests are the fragments of forests in Nandi County of the once expansive forest area that included the Kakamega Forest before the 1920s.
Potential Growth, Yields and Socioeconomic Benefits of Four Indigenous Species for Restoration in Moist Forests, Mau Kenya
Cheboiwo, J., Mugabe, R., Mbinga, J., Mutiso, F.
Journal of Environment and Earth Science, Vol.5, No.6, 2015.p 72-85. Abstract: The study was aimed at bridging the knowledge gap by assessing the growth, yield potentials and financial returns of four indigenous species namely P. africana, X.gilletti, J. procera, and P. fulva.
Floristic Composition, Affinities and Plant Formations in Tropical Forests: A Case Study of Mau Forests in Kenya
Mutiso, F., Mugo, J., Cheboiwo, J., Sang, F., Tarus, G.
International Journal of Agriculture and Forestry 2015, 5(2): 79-91 Abstract: In the past, Mau forest complex has faced a wide range of disturbances majorly anthropogenic in nature. In this paper, the ecosystem floristic composition, richness, diversity and affinities are evaluated.
Financial analysis of growing Eucalyptus grandis for production of medium size power transmission poles and firewood in Kenya
Langat, D., Cheboiwo, J., Muchiri, M.
African Journal of Agriculture and Utilisation of Natural Resources for Sustainable Development 1 (1): 38-45, January, 2015 Abstract: Eucalyptus grandis are grown in most ecological zones and variety of soils in Kenya. Eucalyptus production is likely to increase due to rising demand for transmission poles and firewood.
Performance Of 28-Year-Old Provenances Of Liquidambar Styraciflua At Two Sites In Western Kenya
Mbinga, J., Chagala-Odera, E.
Octa Journal of Environmental Research Vol. 3(1): 094-099 Abstract: The phenotypic variation in growth of ten 28-year-old Liquidambar styraciflua provenances was studied at two sites, Lugari and Kakamega in Western Kenya.
Determining The Pottential For Introducing and Sustaining participatory Forest Management: A Case Study of South Nandi Forest of Western Kenya
Mbuvi, M.T.E, Musyoki, J.K., Ayiemba, W.O., Gichuki, J.W.
International Journal of Biodiversity and Conservation Abstract: This study was conducted to provide socio-economic baseline information about the forest adjacent community members and other forest stakeholders who are the key blocks upon which the joint management strategies and programmes would be anchored.
An Assessment of the Socio-economic Importance of Melia volkensii based Enterprises in Kenya
Luvanda A., Musyoki J., Cheboiwo J., Wekesa, L and Ozawa M. (2015) KEFRI
Abstract: Melia market study as part of Extension is one of the four components of the Project on the Development of Drought Tolerant Trees species for the Drylands of Kenya, which is implemented by the Kenya Forestry Research Institute (KEFRI) and Japan International Cooperation Agency (JICA).
Isolation and characterization of microsatellite markers for Acacia tortilis(Forsk.) Hayne
Omondi, S., Machua,J., Gicheru, J. and Hanaoka, S.
(2015) Springer Abstract: Acacia tortilis is a drought tolerant multipurpose dryland tree species widely distributed in Africa and Asia. Its overexploitation has caused its population decrease. A set of 11 polymorphic nuclear microsatellite loci were isolated.
Socio-Economics Of Trans-Boundary Timber Commodity Chain In The East And Central Africa Region
Cheboiwo, J., Biloko, F., Abdalla, A., Kambuku, R. and Mutaganda, A.
(2015) KEFRI Abstract: The global Forest Law Enforcement, Governance and Trade (FLEGT) process has become an important tool in Africa, Asia and South America to control illegal timber trade with support from the European Union and other partners.