Climbing for survival? A new altitudinal limit from black-cheeked gnateater (Conopophaga melanops) in Atlantic Forest
DOI:
https://doi.org/10.37002/biodiversidadebrasileira.v13i4.2300Palavras-chave:
Occurrence expansion, mountain biodiversity , deforestation , global warming; conservationResumo
The Brazilian Atlantic Forest, despite being one of the most threatened biomes in the world, remains one of the great hotspots of global biodiversity and bird endemism. Elevation plays a significant role in influencing the high number of endemic bird species in this region. The Black-cheeked Gnateater (Conopophaga melanops), endemic to the Atlantic Forest, is typically found in lowland forests along the east coast of Brazil, ranging from sea level to 800 meters above sea level. Due to its high sensitivity to ecological disturbances, it serves as an excellent bioindicator of environmental quality. During a field sampling expedition in Parque Nacional da Serra dos Órgãos, we captured two individuals of C. melanops at altitudes of 1287 and 1409 meters. To explain this new altitude record, we propose two hypotheses. First, the lack of previous sampling in the highest regions of the Atlantic Forest, likely due to limited access and scarce historical studies, may have resulted in the underreporting of this species at higher elevations. Second, there is the possibility that bird populations are migrating to more pristine areas at higher elevations due to habitat loss in the lowland regions. The second hypothesis raises important implications for the conservation of the Black-cheeked Gnateater. Since this species relies on intact habitats for its survival, we must consider whether deforestation in its historic range could be driving these new altitude records.
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