Testing alternative hypotheses for evolutionary diversification in an African songbird: rainforest refugia versus ecological gradients.


Geographic isolation in rainforest refugia and local adaptation to ecological gradients may both be important drivers of evolutionary diversification. However, their relative importance and the underlying mechanisms of these processes remain poorly understood because few empirical studies address both putative processes in a single system. A key question is… (More)
DOI: 10.1111/j.1558-5646.2011.01386.x


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