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Dryad

A multiscale analysis of factors influencing Blackpoll Warbler occupancy and abundance during the non-breeding season in eastern Colombia

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Oct 18, 2024 version files 54.44 KB

Abstract

The dataset includes two survey methods to monitor Blackpoll Warbler populations and assess habitat structure in tropical ecosystems across Colombia. The first method involved surveys conducted along 128 transects (regional-scale data), each 100 meters in length and 50 meters in width, across multiple sites during two sampling periods (2017 and 2018). The transects, situated in both uniform habitats (foothill tropical rainforests and terra firma tropical humid forests) and transitional/agricultural systems, were surveyed by trained observers using visual and auditory species identification techniques. Each transect was surveyed at least twice per season, with multiple repetitions to reduce biases.

The second method, point counts (vegetation and landscape scale), was conducted across different habitat types in the Meta and Guaviare regions, with points strategically placed to ensure habitat homogeneity, at 26 sites using 160 point-count surveys, each within a 30-meter radius. Both transect and point count data were analyzed based on observer and repetition to determine species presence and absence. This combined methodology provides a comprehensive understanding of species distribution and habitat preferences across different landscape scales.