Mytilus trossulus in NW Greenland is genetically more similar to North Pacific than NW Atlantic populations of the species
Changes in climate-related factors such as ice coverage, water temperature, and ocean currents have been proposed to facilitate an increased interchange of species in the High Arctic between the Pacific and Atlantic oceans. In Greenland, the colonization of the mussel species Mytilus edulis has been suggested to have occurred recently and exclusively from Northwest Atlantic populations. The source population for its sibling species Mytilus trossulus is however unknown, and therefore we aimed to explore its genetic origin. Using 54 SNP markers, M. trossulus was identified from three Greenland blue mussel populations collected in 2012–2014 and the relative similarities to Northwest Atlantic and North Pacific M. trossulus populations were assessed. Populations were found to fall into two clades. The North Pacific is the most likely source for the northern Greenland M. trossulus probably as a result of occasional postglacial long-distance dispersal through the Bering Strait.
Our findings in M. trossulus are in agreements with the predictions that climate change will, in addition to driving a northward expansion of temperate-boreal species into the Arctic Ocean, increase the rate of trans-Arctic interchange between the Atlantic and the Pacific oceans.
KeywordsBiogeography Trans-Arctic transportation SNPs Mytilus edulis Mytilus trossulus Greenland
The authors gratefully acknowledge Anders Mosbech and Rune Dietz for sampling of mussels at Savissivik in northwestern Greenland, and Dr. Peter Cranford for providing samples from Canada. We thank Jonathan Gardner and Jean-Pierre Desforges for valuable comments on the manuscript.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the authors.
Sampling and field studies
All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable.
- Belkhir K, Borsa P, Chikhi L, Raufaste N, Bonhomme F. (2003) GENETIX version 4.04, logiciel sous Windows™ pour la genetique des populations. Laboratoire Genome, Populations, Interactions: CNRS UMR 5000, Université de Montpellier II, MontpellierGoogle Scholar
- Benzécri JP (1992) Correspondence analysis handbook. In: Balakrishnan N, Schucany WR, Garvey PR (eds) Statistics: a series of textbooks and monographs, Vol 125. Marcel Dekker, New York, NYGoogle Scholar
- Dyke AS, Dale JE, McNeely RN (1996) Marine mollusks as indicators of environmental change in glaciated North America and Greenland during the last 18000 years. Géog Phys Quatern 50(2):125–184Google Scholar
- Feder HM, Norton DW, Geller JB (2003) A review of apparent 20th century changes in the presence of mussels (Mytilus trossulus) and macroalgae in Arctic Alaska, and of historical and paleontological evidence used to relate mollusc distributions to climate change. Arctic 56(4):391–407CrossRefGoogle Scholar
- Gabriel S, Ziaugra L, Tabbaa D (2009) SNP genotyping using the Sequenom MassARRAY iPLEX platform. Curr Protoc Hum Genet 60:2.12.1–12.12.18Google Scholar
- Gardner JPA, Zbawicka M, Westfall KM, Wenne R (2016) Invasive blue mussels threaten regional scale genetic diversity in mainland and remote offshore locations: the need for baseline data and enhanced protection in the Southern Ocean. Glob Chang Biol 22:3182−3195.Google Scholar
- Larrain MA, Zbawicka M, Araneda C, Gardner JPA, Wenne R (2018) Native and invasive taxa on the Pacific coast of South America: Impacts on aquaculture, traceability and biodiversity of blue mussels (Mytilus spp.). Evol Appl 11:298–311.Google Scholar
- Wanamaker AD, Kreutz KJ, Borns HW, Introne DS, Feindel S, Funder S, Rawson PD, Barber BJ (2007) Experimental determination of salinity, temperature, growth, and metabolic effects on shell isotope chemistry of Mytilus edulis collected from Maine and Greenland. Paleoceanography 22:PA2217CrossRefGoogle Scholar
- Wennerström L, Laikre L, Ryman N, Utter FM, Ab Ghani NI, André C, DeFaveri J, Johansson D, Kautsky L, Merilä J, Mikhailova N, Pereyra R, Sandström A, Teacher AGF, Wenne R, Vasemägi A, Zbawicka M, Johannesson K, Primmer CR (2013) Genetic biodiversity in the Baltic Sea: species-specific patterns challenge management. Biodivers Conserv 22:3045–3065CrossRefGoogle Scholar
- Zbawicka M, Sanko T, Strand J, Wenne R (2014) New SNP markers reveal largely concordant clinal variation across the hybrid zone between Mytilus spp. in the Baltic Sea. Aquat Biol 21:25–36Google Scholar
- Zbawicka M, Trucco MI, Wenne R. (2018) Single nucleotide polymorphisms in native South American Atlantic coast populations of smooth shelled mussels: hybridization with invasive European Mytilus galloprovincialis. Genetics Selection Evolution 50:5Google Scholar