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Non-random gene flow: an underappreciated force in evolution and ecology
Pim Edelaar1, Daniel I Bolnick
1Department of Conservation Biology, Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Sevilla, Spain. edelaar@ebd.csic.es
Trends in Ecology & Evolution
|August 14, 2012
Summary
Dispersal, the movement of organisms, is often assumed to be random. This review highlights that non-random gene flow can significantly impact evolution and ecology.
Area of Science:
- Ecology and Evolutionary Biology
- Population Genetics
Background:
- Dispersal is a critical life-history trait influencing species persistence, evolution, and diversification.
- The assumption of random dispersal may be inaccurate, as gene flow can be non-random, enriching specific genotypes.
Purpose of the Study:
- To review and compare sources of non-random gene flow.
- To summarize the ecological and evolutionary consequences of non-random gene flow.
Main Methods:
- Literature review and synthesis of existing research on dispersal and gene flow.
- Comparative analysis of different mechanisms driving non-random gene flow.
Main Results:
- Non-random gene flow can arise from various sources, leading to biased dispersal.
- This biased dispersal has significant implications for local adaptation, metapopulation dynamics, climate change adaptation, biological invasions, and speciation.
Conclusions:
- Non-random gene flow is potentially ubiquitous and impactful, necessitating its integration into ecological and evolutionary theory.
- Future research should prioritize testing for and quantifying non-random gene flow to refine our understanding of evolutionary processes.
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