Comparative phylogeography of marine cladocerans |
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Authors: | Alan Durbin Paul D N Hebert Melania E A Cristescu |
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Institution: | (1) Department of Marine Sciences, University of North Carolina, 340 Chapman Hall, CB# 3300, Chapel Hill, NC 27599, USA;(2) Department of Integrative Biology, University of Guelph, Guelph, ON, Canada, N1G 2W1;(3) Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, Canada, N9B 3P4 |
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Abstract: | We examined the population genetics of six species of marine cladocerans, using a ~600 bp fragment of the cytochrome oxidase
subunit I gene sequence. Phylogenetic analysis revealed significant intraspecific, semi-allopatric phylogenetic breaks in
four out of five species belonging to the Podonidae, supporting an ancient radiation and oceanic expansion for this group.
By contrast, Penilia
avirostris (Sididae) displayed no phylogeographic structure across a global sampling, suggesting a recent worldwide expansion. Our results
also show a transoceanic distribution of identical or very similar haplotypes in several species of marine Cladocera, which
may be interpreted as either natural transport or evidence of recent anthropogenic transport. If the latter is the case, marine
cladocerans represent one of the first genetically documented cases of exotic or invasive marine zooplankton, likely an underreported
group.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.
Sequence data from this article have been deposited with the EMBL/GenBank Data Libraries under accession nos. EU675871–EU675924. |
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