Patch size does not always indicate bird species diversity: case in peri-urban tropical habitat in Riau, Indonesia

Abstract Larger patches generally are inhabited by higher species richness, including birds, as predicted the island biogeography theory. The objective of this research was to reveal response bird richness in different patch sizes peri-urban habitat. study site area five (2 large near human activities, remote with a small lake, patch, corridor patch) disturbed secondary shrub-forest Riau University, Sumatra. Birds were observed using standard point-counts early morning and late afternoon (8 points/patch, 3 replicates, total 40 observation-hour) March-April 2021. Species (S), Shannon-Wiener diversity indices (H’), Chao prediction, Bray-Curtis similarity (B) calculated. Total 979 individual birds observed, consisted 68 from 28 families B ranged 0.573 0.846. Large lake had highest (S:39 species, Chao:54) H’ (3.097). However, two closed activities lowest number (S:27, Chao:30, H’:2.908, S:23, Chao:32, H’:2.938, respectively), even lower than (S:30, Chao:40, H’:2.925) or (S:34; Chao:51, H’:2.724). Clearly disturbance micro-habitat affect local scale.