Sherman-lifehistory-2008.pdf (257.34 kB)
Is life history a barrier to dispersal? Contrasting patterns of genetic differentiation along an oceanographically complex coast
journal contribution
posted on 2008-01-01, 00:00 authored by Craig ShermanCraig Sherman, A Hunt, D AyreExtreme variation in early life-history strategies is considered a moderately good predictor of genetic subdivision and hence dispersal for a range of marine species. In reality, however, a good deal of population differentiation must reflect historical effects, more subtle variation in life histories, and, particularly, the interaction of larvae with oceanographic processes. Using a combination of allozyme and microsatellite markers, we show that the large-scale genetic structure of populations of three species (direct and planktonically developing cushion stars and a planktonic developing sea anemone that is also asexually viviparous) varies consistently, in line with the predicted capacity for dispersal within three geographic regions. We detected high levels of genetic subdivision for the direct developing cushion star (FST = 0.6), low levels for the planktonically developing cushion star (FST = 0.009), and intermediate levels for the sexual/asexual sea anmone (FST = 0.19). These patterns are exhibited despite the highly variable patterns of current movement and the presence of biogeographic barriers. Our results suggest that, although there is large scale genetic differentiation for two species, patterns of population connectivity are remarkably consistent within major regions and do not reflect variation in major oceanographic processes or genetic discontinuity coincident with biogeographic boundaries.
History
Journal
Biological journal of the Linnean SocietyVolume
95Issue
1Pagination
106 - 116Publisher
Wiley - BlackwellLocation
Oxford, EnglandPublisher DOI
Link to full text
ISSN
0024-4066eISSN
1095-8312Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2008, The Linnean Society of LondonUsage metrics
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Science & TechnologyLife Sciences & BiomedicineEvolutionary Biologygene flowintertidalinvertebrateslarval dispersalANEMONE ACTINIA-TENEBROSASTARFISH LINCKIA-LAEVIGATAEAST AUSTRALIAN CURRENTPOPULATION-STRUCTUREASEXUAL REPRODUCTIONGEOGRAPHIC-VARIATIONGENOTYPIC DIVERSITYINTRASPECIFIC PHYLOGEOGRAPHYMARINE-INVERTEBRATESSOUTHERN AUSTRALIA
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