Levantamento da avifauna em uma unidade de proteção integral na zona limítrofe à margem do Rio Iguaçu

Abstract

Atlantic Forest ecosystems harbor a high density and diversity of birds. In Paraná, data referring to the composition, adaptation and behavior of the avifauna in forests with different equilibrium conditions are still unclear. The research aimed to investigate the structure of the avifauna in different places of an integral protection unit and to infer possible ecological interactions that determine the faunistic variation. The study was conducted at the Paulo Pinto de Oliveira Municipal Ecological Station, on the banks of the Iguaçu River, for 6 months, 10 sampling stations were established with 5 active search transects, making observations, sound and photographic records. A total of 116 species were recorded, distributed in 43 families, representing approximately 15% of the state's avifauna. The integrated data of abundance, diversity and trophic guild allowed observing that the birds are distributed according to the phytophysiognomic characteristics of the sampled places, developing different survival strategies. The abundance data submitted to non-metric multidimensional scaling (nMDS) showed that the sampling stations with fauna similarity have the landscape composed by similar vegetal typologies. A great diversity of birds was observed at the site that act in the balance of the biota by dispersing seeds, optimizing pollination and stabilizing the trophic chain, developing relationships to explore food resources and search for shelters that influence their distribution. The survey of species and their ecological relationships can contribute to the development of conservation strategies for the unit.