Ocean currents help explain population genetic structure.

Proceedings. Biological Sciences
Crow WhiteRobert J Toonen

Abstract

Management and conservation can be greatly informed by considering explicitly how environmental factors influence population genetic structure. Using simulated larval dispersal estimates based on ocean current observations, we demonstrate how explicit consideration of frequency of exchange of larvae among sites via ocean advection can fundamentally change the interpretation of empirical population genetic structuring as compared with conventional spatial genetic analyses. Both frequency of larval exchange and empirical genetic difference were uncorrelated with Euclidean distance between sites. When transformed into relative oceanographic distances and integrated into a genetic isolation-by-distance framework, however, the frequency of larval exchange explained nearly 50 per cent of the variance in empirical genetic differences among sites over scales of tens of kilometres. Explanatory power was strongest when we considered effects of multiple generations of larval dispersal via intermediary locations on the long-term probability of exchange between sites. Our results uncover meaningful spatial patterning to population genetic structuring that corresponds with ocean circulation. This study advances our ability to interpret popul...Continue Reading

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Citations

Mar 17, 2011·Nature Communications·Jonathan B Puritz, Robert J Toonen
May 12, 2012·Integrative and Comparative Biology·Jenni E KesäniemiK Emily Knott
Aug 14, 2012·Integrative and Comparative Biology·Paola C López-DuarteLisa A Levin
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