Woody species diversity and structure across natural forest coffee, semi-forest coffee, and homegarden coffee in the Yayu Coffee Forest Biosphere Reserve, Southwest Ethiopia

An assessment of woody species variation in coffee agroforestry systems in Ethiopia. From 90 plots, 27 woody species were recorded in natural forest, semi-forest, and homegarden coffee systems of the Yayu Coffee Forest Biosphere Reserve.

Natural forest coffee showed the highest biodiversity, structural complexity, and shade-tree regeneration. Semi-forest coffee was similar structurally, while homegarden coffee had significantly lower diversity. Similarity indices showed strong species overlap between natural and semi-forest systems, confirming their key role in biodiversity conservation.