Journal article
Coalescent and biophysical models of stepping-stone gene flow in neritid snails
ED Crandall, EA Treml, PH Barber
Molecular Ecology | Published : 2012
DOI: 10.1111/mec.12031
Abstract
Marine species in the Indo-Pacific have ranges that can span thousands of kilometres, yet studies increasingly suggest that mean larval dispersal distances are less than historically assumed. Gene flow across these ranges must therefore rely to some extent on larval dispersal among intermediate 'stepping-stone' populations in combination with long-distance dispersal far beyond the mean of the dispersal kernel. We evaluate the strength of stepping-stone dynamics by employing a spatially explicit biophysical model of larval dispersal in the tropical Pacific to construct hypotheses for dispersal pathways. We evaluate these hypotheses with coalescent models of gene flow among high-island archipe..
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Awarded by NSF Doctoral Dissertation Improvement Grant
Awarded by NSF
Awarded by Australian Research Council
Awarded by NSF Coral Triangle Partnerships for International Research and Education
Funding Acknowledgements
This dissertation project had its genesis during E.D.C.'s undergraduate research in the 1998 Biology and Geomorphology of Tropical Islands course, taught at the UC Berkeley Gump Station in French Polynesia. We gratefully acknowledge the people and governments of American Samoa, Fiji, French Polynesia, Samoa and Vanuatu for permitting our sample collections and for assistance in collections. In particular, we thank E. Bardi, S. Crandall, N. Davies, K. Feussner, S. Ravuna, S. Siolo, R. Utzurrum, D. Vargo, L. Wade and the Turner Family for their assistance with field collections and permits. M. Frey graciously loaned additional samples from the Cook Islands, New Caledonia, Fiji and American Samoa and J. Taffel assisted with molecular data collection. Grants to E. D. C. from the Lerner-Grey Fund (American Museum of Natural History) and the Walter Sage Memorial Fund (Conchologists of America), and the NSF Doctoral Dissertation Improvement Grant-DEB-0508788- to E. D. C. funded sample collections. NSF grants DEB-0338566 and OCE-0349177 to P. H. B funded sequencing and part of E.D.C.'s graduate stipend. E.A.T.'s modelling work was funded in part by the Australian Research Council (DP0878306), the Kathryn Fuller Post-Doctoral Fellowship (World Wildlife Fund), the NSF Coral Triangle Partnerships for International Research and Education, OISE-0730256 to P. H. B., K. Carpenter and P. Halpin. E. Anderson, T. Eichhorst, D. Drown, J. Finnerty, L. Kaufman, L. Mullineaux, J. Philibotte, C. Riginos, E. Sbrocco, C. Schneider, L. Smith, S. Thorrold, R. Toonen and two anonymous reviewers provided very useful comments and discussion. The Crandall Family provided computational resources for Migrate analyses as well as moral support. E. D. C. thanks S. Crandall for her continued patience and support.