Avifauna em áreas de mineração: diversidade e conservação em Niquelândia e Barro Alto GO

• Autor(a) principal: CURCINO, Alexandre
• Data de Publicação: 2011
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/2636
• topic: avifauna; diversidade; conservação; pontos fixos.; methodology; fixed points; avifauna; Cerrado; community.; CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA

In the fixed point methodology, the observer remains for a predetermined time, recording all birds registered by observation or hearing. Widely used in temperate regions, the methodology has been used in Brazil, where it has suffered adaptations through the years. Whereas the current studies show different sampling times of methodology (10, 15 and 20 min), the aim of this survey was to compare the birds richness estimated for the sampling times of 10 and 20 minutes, in cerrado, gallery forest and vereda, in the regions of Niquelândia and Barro Alto - Goias and verify the effectiveness of bird detections per hour of study for different sampling situations and travel times between fixed points. The survey in Niquelândia occurred in 2007 and 2008. Barro Alto, in the years 2008 and 2009. At each location were established 20 point counts, and sampled five points between 6h00min and 8h40min. The points were drawn for 10 min and 20 min sampling . The results suggest that the researcher who remains 10 min at each point obtain the same statistical results that the researcher who remains 20 min at each point. The species detection efficiency is related to the balance in the choice of sampling time and displacement in order to increase the chances of finding rare species, and at the same time, maximize the number of detections.