Phylogeography of the freshwater mussel species Lasmigona costata: testing post-glacial colonization hypotheses

Understanding genetic diversity across large spatial scales helps to reveal patterns of population structure. Mitochondrial DNA sequences and microsatellite loci were used to analyze the phylogeography of a common unionid species ( Lasmigona costata ) from the Laurentian Great Lakes and historically...

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Bibliographic Details
Published in:Hydrobiologia 2018-03, Vol.810 (1), p.191-206
Main Authors: Hewitt, Trevor L., Bergner, Jennifer L., Woolnough, Daelyn A., Zanatta, David T.
Format: Article
Language:English
Subjects:
Analysis
Biodiversity
Biomedical and Life Sciences
Colonization
Cost analysis
Deoxyribonucleic acid
Dispersal
Dispersion
DNA
DNA sequencing
DNA structure
Ecology
Freshwater
Freshwater & Marine Ecology
Freshwater Bivalves
Freshwater molluscs
Gene frequency
Gene sequencing
Genetic diversity
Genetic variation
Inland water environment
Lakes
Lasmigona costata
Life Sciences
Loci
Microsatellites
Mitochondrial DNA
Mollusks
Nucleotide sequence
Phylogeography
Population genetics
Population structure
Recession
Rivers
Species
Watersheds
Zoology
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Summary:Understanding genetic diversity across large spatial scales helps to reveal patterns of population structure. Mitochondrial DNA sequences and microsatellite loci were used to analyze the phylogeography of a common unionid species ( Lasmigona costata ) from the Laurentian Great Lakes and historically connected river drainages. Phylogeographic patterns were assessed to determine colonization routes into the Great Lakes following glacial recession. A suite of seven microsatellite loci were genotyped and a fragment of the mitochondrial gene COI was sequenced. Multiple analyses using microsatellite allele frequencies suggest at least two distinct genetic populations for L. costata . A total of seven hypothesized post-glacial dispersal scenarios were compared using isolation by distance to test the various dispersal models. Evidence was strongest for two post-glacial dispersal routes into the Great Lakes: one utilizing a connection between the Wabash and Maumee River watersheds, and one utilizing a connection between the Wisconsin River and Green Bay watersheds. A highly differentiated and monophyletic population of L. costata was identified in the Ozark Highlands, which may constitute a unique taxonomic entity.
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-016-2834-3