We examine latitudinal effects of breeding bird taxonomic, phylogenetic and functional β‐diversity (Tβ, Pβ and Fβ, respectively) along elevational gradients to test predictions derived from Janzen's (The American Naturalist 101:233–249,… Click to show full abstract
We examine latitudinal effects of breeding bird taxonomic, phylogenetic and functional β‐diversity (Tβ, Pβ and Fβ, respectively) along elevational gradients to test predictions derived from Janzen's (The American Naturalist 101:233–249, 1967) classic ideas that tropical mountains represent stronger dispersal barriers than temperate mountains.
               
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