KARI-NARL-KSS M98 2008 Macrofauna Diversity and Abundance across Different Land Use Systems in Embu, Kenya

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Kenya Agricultural Research Institute
This paper presents data on diversity and abundance of soil macrofauna of various land use systems in Embu, Kenya (natural forest, plantation forest, fallow, coffee, tea, napier, and maize). Each was sampled for macrofauna using three sampling methods (monolith, transect and pitfall traps). Thirty four (34) genera/species of soil macrofauna were recorded, the highest number (27) being observed in napier. Majority of these genera/species being Coleoptera. Renyi diversity profile indicates that in terms of species richness (a at OCJ), plantation forest was the richest of all land use systems, followed by coffee>napier>natural forest with fallow/pasture being least rich in species, maize and tea were not different from each other in richness. It was however not possible to clearly order the land use system in terms of species diversity as indicated by the diversity indices. Shannon index of diversity (a= 1) indicated that coffee was most diverse of the land use systems followed by plantation forest>natural forest>napier>maize>tea, while fallow/pasture was least diverse in macrofauna species. On the other hand, Simpson's diversity (a=O) indicated that maize was the most diverse followed by fallowed by fallow=napier=coffee>tea>natural forest>plantation forest.