Postglacial expansion of the arctic keystone copepod calanus glacialis

Calanus glacialis, a major contributor to zooplankton biomass in the Arctic shelf seas, is a key link between primary production and higher trophic levels that may be sensitive to climate warming. The aim of this study was to explore genetic variation in contemporary populations of this species to i...

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Bibliographic Details
Published in:Marine Biodiversity
Main Authors: Weydmann, Agata, Przylucka, Aleksandra, Lubosny, Marek, Walczynska, Katarzyna S., Serrao, Ester A., Pearson, Gareth, Burzynski, Artur
Format: Article in Journal/Newspaper
Language:English
Published: Springer Heidelberg 2018
Subjects:
North-Atlantic
Comparative Phylogeography
Zooplankton Community
Population-Genetics
Mitochondrial-Dna
West Greenland
Finmarchicus
Divergence
Fjord
Water
Arctic
Greenland
Hornsund
Calanus glacialis
Kongsfjord*
Kongsfjorden
North Atlantic
Zooplankton
Spitsbergen
Online Access:http://hdl.handle.net/10400.1/11514
https://doi.org/10.1007/s12526-017-0774-4
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Summary:Calanus glacialis, a major contributor to zooplankton biomass in the Arctic shelf seas, is a key link between primary production and higher trophic levels that may be sensitive to climate warming. The aim of this study was to explore genetic variation in contemporary populations of this species to infer possible changes during the Quaternary period, and to assess its population structure in both space and time. Calanus glacialis was sampled in the fjords of Spitsbergen (Hornsund and Kongsfjorden) in 2003, 2004, 2006, 2009 and 2012. The sequence of a mitochondrial marker, belonging to the ND5 gene, selected for the study was 1249 base pairs long and distinguished 75 unique haplotypes among 140 individuals that formed three main clades. There was no detectable pattern in the distribution of haplotypes by geographic distance or over time. Interestingly, a Bayesian skyline plot suggested that a 1000-fold increase in population size occurred approximately 10,000 years before present, suggesting a species expansion after the Last Glacial Maximum. GAME from the National Science Centre, the Polish Ministry of Science and Higher Education Iuventus Plus [IP2014 050573]; FCT-PT [CCMAR/Multi/04326/2013]; [2011/03/B/NZ8/02876]

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