the dual role of andean topography in primary divergence: functional and neutral variation among populations of the hummingbird, metallura tyrianthina.the ridges and valleys of the andes create physical barriers that limit animal dispersal and cause deterministic local variation in rainfall. this has resulted in physical isolation of animal populations and variation in habitats, each of which has likely contributed to the evolution of high species diversity in the region. however, the relative influences of geographic isolation, ecoclimatic conditions, and their potential interactions remain poorly understood. to address this, we compared patt ...201626801894
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