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Tree diversity and density in agroforestry systems has been found to increase the diversity and density of soil macro-fauna. However, very little is known of the relationship between tree diversity and density in cocoa agroforests and soil macro-fauna diversity and density. This study was therefore undertaken to fill this knowledge gap. A mixed research approach was adopted and data analysis was done using descriptive and inferential statistics. From the findings, most cocoa farmers perceived that tree diversity in cocoa agroforests was either average, high or very high. Most cocoa farmers perceived that tree density on its part was either average or low. Concerning soil macro-fauna diversity in cocoa-based agroforestry systems, most of the cocoa farmers perceived that soil macro-fauna diversity was either average or high. For soil macro-fauna density in cocoa agroforests, most cocoa farmers perceived that soil macro-fauna density was either average, high or low. Through correlation and regression analyses, it was found that a statistically significant (p<0.05) direct non-cause-effect and cause-effect relationship existed between the level of tree diversity and density in cocoa-based agroforestry systems (very high tree diversity, high tree diversity, average tree diversity, low tree diversity, very low tree diversity), and the level of soil macro-fauna diversity and density. This implies that increasing tree species diversity and density leads to increasing soil macro-fauna diversity and density in cocoa-based agroforestry systems. It is therefore recommended that policy makers take drastic measures to ensure greater tree diversity and density in cocoa agroforests in order to ensure higher soil macro-fauna diversity and density.
Jose S. Agroforestry for conserving and enhancing biodiversity. Agroforestry Systems. 2012;85: 1 – 8.
Noordwijk VM, Duguma L, Dewi S, Leimona B, Catacutan D, Lusiana B, Oborn I, Hairiah K, Minang P, Ekadinata A, Martini E, Degrande A, Prabhu R. Agroforestry into its fifth decade: local responses to global challenges and goals in the Anthropocene in book: Sustainable Development through Trees on Farms: Agroforestry in its Fifth Decade Publisher: World Agroforestry (ICRAF), Bogor, Indonesia. 2019;347-368. Available:http://www.worldagroforestry.org/downloads/Publications/PDFS/B19029.pdf
Awazi NP, Tchamba NM. Enhancing agricultural sustainability and productivity under changing climate conditions through improved agroforestry practices in smallholder farming systems in sub-Saharan Africa. African Journal of Agricultural Research. 2019;14(7):379-388.
Oke DO, Odebiyi KA Traditional cocoa-based agroforestry and forest species conservation in Ondo State, Nigeria. Agric Ecosyst Environ. 2007;122:305 – 311.
Snoeck D, Abolo D, Jagoret P. Temporal changes in VAM fungi in the cocoa agroforestry systems of central Cameroon. Agroforestry Systems. 2010;78:323 – 328.
Sonwa DJ, Nkongmeneck AB, Weise SF, Tchatat M, Adesina AA, Janssens MJ. Diversity of plants in cocoa agroforests in the humid forest zone of southern Cameroon. Biodivers Conserv. 2007;16: 2385 – 2400.
Atangana A, Khasa D, Chang S, Degrande A. Agroforestry for soil conservation. Tropical Agroforestry. 2013;203-216.
Utomo B, Prawoto AA, Bonnet S, Bangviwat A, Gheewala SH. Environmental performance of cocoa production from monoculture and agroforestry systems in Indonesia. Journal of Cleaner Production. 2016;134:583 – 591.
Amare D, Wondie M, Mekuria W, Darr D. Agroforestry of smallholder farmers in Ethiopia: Practices and benefits. Small-Scale Forestry. 2018;18(1):39-56.
Tsufac AR, Yerima BPK, Awazi NP. Assessing the role of agroforestry in soil fertility improvement in Mbelenka-Lebialem, Southwest Cameroon. International Journal of Global Sustainability. 2019; 3(1): 115 – 135.
Awazi NP, Tchamba NM, Avana TML. Climate change resiliency choices of small-scale farmers in Cameroon: Determinants and policy implications. Journal of Environmental Management. 2019;250: 109560.
Awazi NP, Avana TML. Agroforestry as a sustainable means to farmer-grazier conflict mitigation in Cameroon. Agroforestry Systems. 2020;94(6):2147 – 2165. Available:https://doi.org/10.1007/s10457-020-00537-y
Awazi NP, Tchamba NM, Temgoua LF. Enhancement of resilience to climate variability and change through agroforestry practices in smallholder farming systems in Cameroon. Agroforest Syst. 2020;94:687-705. Available:https://doi.org/10.1007/s10457-019-00435-y
Leakey RRB. Socially modified organisms in multifunctional agriculture - addressing the needs of smallholder farmers in Africa. Arch Crop Sci. 2017;1(1):20-29.
Quandt A, Neufeldt H, McCabe JT. The role of agroforestry in building livelihood resilience to floods and droughts in semi-arid Kenya. Ecol Soc. 2017;22(3).
Quandt A, Neufeldt H, McCabe JT. Building livelihood resilience: What role does agroforestry play? Clim Dev; 2018. Available:https://doi.org/10.1080/17565529.2018.1447903
Leakey RRB. A holistic approach to sustainable agriculture: Trees, science and global society. In: Mosquera-Losada, M.R. and Prabhu, R. (eds.), Agroforestry for sustainable agriculture, Burleigh Dodds Science Publishing, Cambridge, UK; 2019. (ISBN: 978 1 78676 220 7; www.bdspublishing.com).
Temgoua LF, Momo SMC, Boucheke RK. Floristic diversity of woody species in cocoa-based agroforestry systems in the littoral region of Cameroon: Case of Loum sub-division. European Scientific Journal . 2019;15(9): 62 – 83.
Rousseau GX, Deheuvels O, Arias IR, Somarriba E. Indicating soil quality in cocoa-based agroforestry systems and old growth forests: The potential of soil macro-fauna assemblage. Ecological Indicators. 2012; 23: 535 – 543.
Montagnini F. Integrating landscapes: Agroforestry for biodiversity conservation and food sovereignty. Springer. 2017;494,
Dollinger J, Jose S. Agroforestry for soil health. Agroforestry Systems. 2018;92: 213 – 219.
Oliveira PHG, Gama-Rodrigues AC, Gama-Rodrigues EF, Sales MVS. Litter and soil-related variation in the functional group abundances in cocoa agroforests using structural equation modeling. Ecological Indicators. 2018;84:254 – 262.
Suarez LR, Audor LCU, Salazar JCS. Formation of macroaggregates and organic carbon in cocoa agroforestry systems. Floresta e Ambiente. 2019;26(3): 2019.
Suarez LR, Josa YTP, Samboni EJA, Cifuentes EHDB, Salazar JCS. Soil macro-fauna under different land uses in the Colombian Amazon. Pesquisa Agropecuaria Brasileira. 2018;53:1383 – 1391.
Marsden C, Martin-Chave A, Cortet J, Hedde M, Capowiez Y. How agroforestry systems influence soil fauna and their functions – A review. Plant and Soil. 2020; 453: 29 – 44.
Dahlsjo CAL, Stiblik P, Jaklova J, Zidek M, Huaycama WJ, Lojka B, Houska J. The local impact of macro-fauna and land use intensity on soil nutrient concentration and exchangeability in lowland tropical Peru. Biotropica. 2020; 52(2): 242 – 251.
Moco MKS, da Gama-Rodrigues EF, da Gama-Rodrigues AC, Machado RCR, Baligar VC. Soil and litter fauna of cacao agroforestry systems in Bahia, Brazil. Agroforestry Systems. 2009;76:127 – 138.
Moco MKS, Gama-Rodrigues EF, Gama-Rodrigues AC, Machado RCR, Baligar VC. Relationships between invertebrate communities, litter quality and soil attributes under different cacao agroforestry systems in the south of Bahia, Brazil. Applied Soil Ecology. 2010;46:347 – 354.
Jagoret P, Michel-Dounais I, Malezieux E. Long term dynamics of cocoa agroforests: A case study in central Cameroon. Agroforestry Systems. 2011;81:267 – 278.
Jagoret P, Michel-Dounias I, Snoeck D, Ngnogue HT, Malezieux E. Afforestation of savannah with cocoa agroforestry systems: A small-farmer innovation in central Cameroon. Agroforestry Systems. 2012;86:493 – 504.
Jagoret P, Kwesseu J, Messie C, Michel-Dounias I, Malezieux E. Farmers’ assessment of the use value of agro-biodiversity in multispecies systems. An application to cocoa agroforests in Central Cameroon. Agroforestry Systems. 2014; 88:983 – 1000.
Tankou CM. The Cameroon cocoa story. The Supply Change – Make Supermarkets fair project sponsored by the European Union; 2015.
Tankou CM, de Snoo GR, Persoon G, de longh HH. Evaluation of smallholder farming systems in the Western Highlands of Cameroon. IOSR Journal of Engineering. 2017;7(1):1–11.
Awazi, NP, Tchamba NM. Determinants of small-scale farmers’ adaptation decision to climate variability and change in the north-west region of Cameroon. African Journal of Agricultural Research. 2018;13(12):534– 543.
Vaast P, Somarriba E. Trade-offs between crop intensification and ecosystem services: The role of agroforestry in cocoa cultivation. Agroforestry Systems. 2014;88: 947–956.
Mukete N, Li Z, Mukete B, Bobyeg P. Cocoa production in Cameroon: A socio-economic and technical efficiency perspective. International Journal of Agricultural Economics. 2018;3(1):1 – 8.
Mortimer R, Saj S, David C. Supporting and regulating ecosystem services in cocoa agroforestry systems. Agroforestry Systems. 2018; 92:1639–1657.
Laird SA, Awung GL, Lysinge RJ. Cocoa farms in the mount Cameroon region: Biological and cultural diversity in local livelihoods. Biodiversity Conservation. 2007; 16:2401 – 2427.
Deheuvels O, Rousseau GX, Quiroga GS, Franco MD, Cerda R, Mendoza SJV, Somarriba E. Biodiversity is affected by changes in management intensity of cocoa-based agroforests. Agroforestry Systems. 2014; 88:1081 – 1099.
Cardinael R, Mao Z, Chenu C, Hinsinaer P. Belowground functioning of agroforestry systems: Recent advances and perspectives. Plant and Soil. 2020;1-13.
Wartenberg AC, Blaser WJ, Gattinger A, Roshetko JM, Van Noordwijk M, Six J. Does shade tree diversity increase soil fertility in cocoa plantations? Agriculture, Ecosystems and Environment. 2017;248: 190 – 199.
Wartenberg AC, Blaser WJ, Gattinger A, Roshetko JM, Van Noordwijk M, Six J.. Soil fertility and Theobroma cacao growth and productivity under commonly intercropped shade-tree species in Sulawesi, Indonesia. Plant and Soil. 2020;453: 87 – 104.
Vanhove W, Vanhoudt N, Van Damme P. Effect of shade tree planting and soil management on rehabilitation success of a 22 year old degraded cocoa (Theobroma cacao L.) plantation. Agriculture, Ecosystems and Environment. 2016;219: 14–25.
Villanueva-Lopez G, Lara-Perez LA, Oros-Ortega I, Ramirez-Barajas PJ, Casanova-Lugo F, Ramos-Reyes R, Aryal DR. Diversity of soil macro-arthropods correlates to the richness of plant species in traditional agroforestry systems in the humid tropics of Mexico. Agriculture, Ecosystems and Environment. 2019;286: 106658.
Prayogo C, Sholehuddin N, Hassan EZ, Putra S, Rachmawati R. Soil macro-fauna diversity and structure under different management of pine-coffee agroforestry system. Journal of Degraded and Mining Lands Management. 2019;6(3):1727.
Rahman PM, Varma RV, Sileshi GW. Abundance and diversity of soil invertebrates in annual crops, agroforestry and forest ecosystems in the Nilgiri biosphere reserve of Western Ghats, India. Agroforestry Systems. 2012;85:165– 177.