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Phylogeography of an estuarine mysid, Neomysis integer (Crustacea, Mysida), along the north-east Atlantic coasts
Remerie, T.; Vierstraete, A.; Weekers, P.H.H.; Vanfleteren, J.R.; Vanreusel, A. (2009). Phylogeography of an estuarine mysid, Neomysis integer (Crustacea, Mysida), along the north-east Atlantic coasts. J. Biogeogr. 36(1): 39-54. dx.doi.org/10.1111/j.1365-2699.2008.01970.x
In: Journal of Biogeography. Wiley-Blackwell: Oxford. ISSN 0305-0270; e-ISSN 1365-2699
Peer reviewed article  
Available in  Authors 
Keywords
    Biological phenomena > Evolution
    Brackish water
    Estuaries
    Estuaries
    Estuarine environment
    Evolution
    Evolution
    Evolution
    Geological time > Phanerozoic > Geological time > Cenozoic > Quaternary > Pleistocene
    Glaciation
    History
    History
    History
    History
    Hydrographic features > Physiographic features > Estuaries
    Polymorphism
    Population distribution
    Saline water > Water > Brackish water
    Water > Brackish water
    Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
    Crustacea [WoRMS]; Mysida [WoRMS]; Neomysis integer (Leach, 1814) [WoRMS]
    ANE, North East Atlantic [Marine Regions]
    Marine/Coastal; Brackish water
Author keywords
    Brackish water; COI; Crustacea; estuary; glacial refugium; mtDNA; mysid;north-east Atlantic Ocean; phylogeography
Authors  Top 
  • Remerie, T.
  • Vierstraete, A.
  • Weekers, P.H.H.
  • Vanfleteren, J.R.
  • Vanreusel, A., more
Abstract
    Aim: The brackish water mysid, Neomysis integer, is one of the most common mysid species along the coasts of the north-east Atlantic. In the present study, the phylogeographical patterns were examined throughout the distribution range of N. integer. In particular, the latitudinal trends in genetic diversity and the distribution of genetic variation were examined in order to elucidate the imprints of the Pleistocene glaciations. Location: North-east Atlantic coasts from the Baltic Sea to the south of Spain. Methods: A total of 461 specimens from 11 populations were analysed by means of single-stranded conformation polymorphism analysis combined with DNA sequencing of a fragment of the mitochondrial cytochrome c oxidase I gene. The genetic structure was examined by using a progression of phylogenetic, demographic and population genetic analyses to elucidate not only the geographical structure, but also the evolutionary history producing that structure. Results: The levels of genetic diversity were relatively uniform throughout the distribution range, with the exception of a decline at the northern and southern edges of distribution. A high heterogeneity was observed between the populations analysed (global FST = 0.787). This is caused by the disparate distribution of the cytochrome oxidase I haplotypes, with several population-specific haplotypes. A clear genetic break (2.4% sequence divergence) occurred between the southernmost Guadalquivir population and all other populations. Main conclusions: The present study corroborates the expectations of the genetic patterns typically observed in an estuarine species. The within-population variability was low, whereas a significant (moderate to high) divergence was observed between populations. Phylogeographical analysis revealed that northern populations within the English Channel, North Sea and Baltic Sea are characterized by several widespread haplotypes, while the Irish population and all sites south of the Bay of Biscay consist solely of unique haplotypes. This pattern, combined with the relative high levels of genetic diversity, could be indicative for the presence of a glacial refugium in the English Channel region. Under this scenario N. integer must have survived the Last Glacial Maximum in the palaeoriver system present in that region.
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