NDLI: Molecular relationships of gammaridean amphipods from Arctic sea ice

Content Provider	Springer Nature Link
Author	Ki, Jang Seu Dahms, Hans Uwe Kim, Il Chan Park, Heum Gi Hop, Haakon Lee, Jae Seong
Copyright Year	2011
Abstract	The information on the biology and ecology of the Arctic sea ice-associated amphipods (Apherusa glacialis, Gammarus wilkitzkii, Onisimus glacialis, and O. nanseni) has increased, but their molecular taxonomic information still remains undisclosed. In the present study, we investigated long-range DNA sequences spanning 18S to 28S rDNA of these four sea ice-associated amphipods and analyzed their genetic relationships with other amphipod taxa. Variations of rDNA within the individuals of the same species were not detected. Phylogenetic analyses showed that each ice amphipod was separated, forming clusters with other conspecifics. Pairwise comparisons led to similar phylogenetic results, showing that the molecular taxonomy of the ice amphipods was in accordance with morphological systematics. In addition, these findings suggest that all four amphipods have little genetic variation compared with their morphologically defined conspecifics from temperate regions. Based on DNA taxonomy, G. wilkitzkii was supported as a species in good standing, refuting a recent synonymization with Gammarus duebeni. Considerably low genetic divergences of O. glacialis and O. nanseni in 18S, ITS, and 28S rDNA suggest the presence of population distinctions within species.
Starting Page	1559
Ending Page	1569
Page Count	11
File Format	PDF
ISSN	07224060
Journal	Polar Biology
Volume Number	34
Issue Number	10
e-ISSN	14322056
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-05-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sympagic amphipod Ribosomal DNA (rDNA) Genetic variation Phylogeny Oceanography Microbiology Ecology Zoology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

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