Phylogeography of the Brittle Star Ophiura sarsii Lütken, 1855 (Echinodermata: Ophiuroidea) from the Barents Sea and East Atlantic

Ophiura sarsii is a common brittle star species across the Arctic and Sub-Arctic regions of the Atlantic and the Pacific oceans. Ophiura sarsii is among the dominant echinoderms in the Barents Sea. We studied the genetic diversity of O. sarsii by sequencing the 548 bp fragment of the mitochondrial C...

Full description

Bibliographic Details
Published in:Diversity
Main Authors: Evgeny Genelt-Yanovskiy, Yixuan Li, Ekaterina Stratanenko, Natalia Zhuravleva, Natalia Strelkova, Qinzeng Xu, Sophia Nazarova
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2021
Subjects:
Online Access:https://doi.org/10.3390/d13020040
https://doaj.org/article/51fe969218034744b2563dd9843863df
Description
Summary:Ophiura sarsii is a common brittle star species across the Arctic and Sub-Arctic regions of the Atlantic and the Pacific oceans. Ophiura sarsii is among the dominant echinoderms in the Barents Sea. We studied the genetic diversity of O. sarsii by sequencing the 548 bp fragment of the mitochondrial COI gene. Ophiura sarsii demonstrated high genetic diversity in the Barents Sea. Both major Atlantic mtDNA lineages were present in the Barents Sea and were evenly distributed between the northern waters around Svalbard archipelago and the southern part near Murmansk coast of Kola Peninsula. Both regions, and other parts of the O. sarsii range, were characterized by high haplotype diversity with a significant number of private haplotypes being mostly satellites to the two dominant haplotypes, each belonging to a different mtDNA clade. Demographic analyses indicated that the demographic and spatial expansion of O. sarsii in the Barents Sea most plausibly has started in the Bølling–Allerød interstadial during the deglaciation of the western margin of the Barents Sea.