Micro-habitat selection by birds depends on vegetation richness, composition and structure.
Micro-habitat selection, BEF experiment, Facilitation, Vegetation structure, Tree richness,
Passive acoustic monitoring.
Historically viewed as a passive component, biodiversity is now recognized as a key active agent in the functioning of ecosystems (BEF). Research in this area have expanded the focus from isolated plant experiments to include multi-trophic levels, in an effort to elucidate the mechanisms mediating these relationships. In this context, the occurrence of a species in a given habitat is influenced by the habitat’s richness, composition, and structure, as well as local biotic interactions. Birds, due to their varied ecosystem functions and ease of sampling, are ideal models for monitoring these dynamics. However, habitat selection in this group is a hierarchical and scale-dependent process, where choices for different activities may diverge. The present study aims to investigate whether micro-habitat selection in birds is guided by vegetation richness, composition (facilitation potential), and structure, and whether such preferences are modulated by the species’ body size and trophic guild. To test this, we conducted recordings in the 155 plots of the BEF experiment applied to Caatinga restoration, BrazilDry. Analyses were performed using Generalized Linear Mixed Models (GLMM). As preliminary results, we found that the three micro-habitat variables tested were important for different species, but that these relationships were not mediated by body size or trophic guild.