Birds of amazonian campinaranas: are abundance, nestedness and number of species affected by deforestation?

Amazonian campinaranas are environments that present low primary productivity, sandy soils and a superficial water table, being under strong deforestation pressure. Such a change in this landscape may lead to shifts in abundance, nestedness, and number of animal species. Our objective was to evaluate whether deforestation in acampinaranaenvironment is altering the abundance, nestedness and number of understory bird species in the Manaus region. Six sampling sites were selected in regards to percentage of deforestation in a 500 m radius (2%, 15%, 18%, 32%, 35% and 38%). We used 20 mist nets in each site between April and May 2017. We recorded 26 species (n = 58). Sites with higher deforestation levels showed a greater number of species (nine and seven, respectively). The abundance of individuals was higher in deforested areas (GLM: R = 0.56, p = 0.0498), since individuals of species tolerant to this type of disturbance were probably able to establish themselves effectively. The number of species did not appear to be influenced by deforestation (GLM: R = 0.86, p = 0.147) or species nestedness (N = 56.94, p = 0.87), indicating that there is no major clustering of species in one site. Incampinaranasthis type of disturbance may be exerting a different influence on bird species when compared to other environments in the Amazon, probably due to their unique characteristics.