Journal
TRENDS IN ECOLOGY & EVOLUTION
Volume 29, Issue 3, Pages 165-176Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tree.2014.01.002
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Funding
- Division Of Environmental Biology
- Direct For Biological Sciences [1119887] Funding Source: National Science Foundation
- Howard Hughes Medical Institute Funding Source: Medline
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Local adaptation has been a major focus of evolutionary ecologists working across diverse systems for decades. However, little of this research has explored variation at microgeographic scales because it has often been assumed that high rates of gene flow will prevent adaptive divergence at fine spatial scales. Here, we establish a quantitative definition of microgeographic adaptation based on Wright's dispersal neighborhood that standardizes dispersal abilities, enabling this measure to be compared across species. We use this definition to evaluate growing evidence of evolutionary divergence at fine spatial scales. We identify the main mechanisms known to facilitate this adaptation and highlight illustrative examples of microgeographic evolution in nature. Collectively, this evidence requires that we revisit our understanding of the spatial scale of adaptation and consider how microgeographic adaptation and its driving mechanisms can fundamentally alter ecological and evolutionary dynamics in nature.
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