Data from: Genetic diversity and connectivity within Mytilus spp. in the subarctic and Arctic

Climate changes in the Arctic are predicted to alter distributions of marine species. However, such changes are difficult to quantify because information on present species distribution and the genetic variation within species is lacking or poorly examined. Blue mussels, Mytilus spp. are ecosystem e...

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Bibliographic Details
Main Authors: Mathiesen, Sofie S., Thyrring, Jakob, Hemmer-Hansen, Jakob, Berge, Jørgen, Sukhotin, Alexey, Leopold, Peter, Bekaert, Michaël, Sejr, Mikael K., Nielsen, Einar E.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2016
Subjects:
Arctic fauna
bivalves
Climate Change
Hybrid zone
population structure
SNPs
glacial refugium
Arctic
Svalbard
White Sea
Greenland
Norway
Climate change
Iceland
Pechora
Pechora Sea
Subarctic
Online Access:http://hdl.handle.net/10255/dryad.123606
https://doi.org/10.5061/dryad.438h3
Description
Summary:Climate changes in the Arctic are predicted to alter distributions of marine species. However, such changes are difficult to quantify because information on present species distribution and the genetic variation within species is lacking or poorly examined. Blue mussels, Mytilus spp. are ecosystem engineers in the coastal zone globally. In order to improve knowledge of distribution and genetic structure of the Mytilus edulis complex in the Arctic, we analyzed 81 SNPs in 534 Mytilus spp. individuals sampled at 13 sites to provide baseline data for distribution and genetic variation of Mytilus mussels in the European Arctic. Mytilus edulis was the most abundant species found with a clear genetic split between populations in Greenland and the Eastern Atlantic. Surprisingly, analyses revealed the presence of M. trossulus in high Arctic NW Greenland (77°N) and M. galloprovincialis or their hybrids in SW Greenland, Svalbard and the Pechora Sea. Furthermore, a high degree of hybridization and introgression between species was observed. Our study highlights the importance of distinguishing between congener species, which can display local adaptation and suggests that information on dispersal routes and barriers are essential for accurate predictions of regional susceptibility to range expansions or invasions of boreal species in the Arctic.

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