Ocean currents influence the genetic structure of an intertidal mollusc in southeastern Australia – implications for predicting the movement of passive dispersers across a marine biogeographic barrier

Miller, Adam D., Versace, Vincent L., Matthews, Ty G., Montgomery, Steven and Bowie, Kate C. 2013, Ocean currents influence the genetic structure of an intertidal mollusc in southeastern Australia – implications for predicting the movement of passive dispersers across a marine biogeographic barrier, Ecology and evolution, vol. 3, no. 5, pp. 1248-1261, doi: 10.1002/ece3.535.

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Title Ocean currents influence the genetic structure of an intertidal mollusc in southeastern Australia – implications for predicting the movement of passive dispersers across a marine biogeographic barrier
Author(s) Miller, Adam D.ORCID iD for Miller, Adam D. orcid.org/0000-0002-1632-7206
Versace, Vincent L.ORCID iD for Versace, Vincent L. orcid.org/0000-0002-8514-1763
Matthews, Ty G.ORCID iD for Matthews, Ty G. orcid.org/0000-0002-0606-5433
Montgomery, Steven
Bowie, Kate C.
Journal name Ecology and evolution
Volume number 3
Issue number 5
Start page 1248
End page 1261
Total pages 14
Publisher Wiley
Place of publication London, England
Publication date 2013
ISSN 2045-7758
Keyword(s) biogeography
Donax deltoides
gene flow
life history
microsatellites
mitochondrial DNA
population structure
southeastern Australia
Summary Major disjunctions among marine communities in southeastern Australia have been well documented, although explanations for biogeographic structuring remain uncertain. Converging ocean currents, environmental gradients, and habitat discontinuities have been hypothesized as likely drivers of structuring in many species, although the extent to which species are affected appears largely dependent on specific life histories and ecologies. Understanding these relationships is critical to the management of native and invasive species, and the preservation of evolutionary processes that shape biodiversity in this region. In this study we test the direct influence of ocean currents on the genetic structure of a passive disperser across a major biogeographic barrier. Donax deltoides (Veneroida: Donacidae) is an intertidal, soft-sediment mollusc and an ideal surrogate for testing this relationship, given its lack of habitat constraints in this region, and its immense dispersal potential driven by year-long spawning and long-lived planktonic larvae. We assessed allele frequencies at 10 polymorphic microsatellite loci across 11 sample locations spanning the barrier region and identified genetic structure consistent with the major ocean currents of southeastern Australia. Analysis of mitochondrial DNA sequence data indicated no evidence of genetic structuring, but signatures of a species range expansion corresponding with historical inundations of the Bassian Isthmus. Our results indicate that ocean currents are likely to be the most influential factor affecting the genetic structure of D. deltoides and a likely physical barrier for passive dispersing marine fauna generally in southeastern Australia.
Language eng
DOI 10.1002/ece3.535
Field of Research 070499 Fisheries Sciences not elsewhere classified
060411 Population, Ecological and Evolutionary Genetics
060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
Socio Economic Objective 830201 Fisheries - Recreational
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30053635

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