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Relationships of environmental specialization to geographic range size (A) and local abundance (B) among rainforest vertebrate species of the AWT. Specialization is measured as the first principal component from a factor analysis of three primary measures of niche dimensions (climate specialization, climate marginality, and vegetation specialization). Range size (ha) and abundance (/ha) are measured as residuals after controlling for effects of phylogeny (see Methods and Dataset S1).
