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Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species

BACKGROUND: The ancient Lake Baikal is characterized by an outstanding diversity of endemic faunas with more than 350 amphipod species and subspecies. We determined the genetic diversity within the endemic littoral amphipod species Eulimnogammarus verrucosus, E. cyaneus and E. vittatus and investiga...

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Autores principales: Gurkov, Anton, Rivarola-Duarte, Lorena, Bedulina, Daria, Fernández Casas, Irene, Michael, Hendrik, Drozdova, Polina, Nazarova, Anna, Govorukhina, Ekaterina, Timofeyev, Maxim, Stadler, Peter F., Luckenbach, Till
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6613252/
https://www.ncbi.nlm.nih.gov/pubmed/31286865
http://dx.doi.org/10.1186/s12862-019-1470-8
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author Gurkov, Anton
Rivarola-Duarte, Lorena
Bedulina, Daria
Fernández Casas, Irene
Michael, Hendrik
Drozdova, Polina
Nazarova, Anna
Govorukhina, Ekaterina
Timofeyev, Maxim
Stadler, Peter F.
Luckenbach, Till
author_facet Gurkov, Anton
Rivarola-Duarte, Lorena
Bedulina, Daria
Fernández Casas, Irene
Michael, Hendrik
Drozdova, Polina
Nazarova, Anna
Govorukhina, Ekaterina
Timofeyev, Maxim
Stadler, Peter F.
Luckenbach, Till
author_sort Gurkov, Anton
collection PubMed
description BACKGROUND: The ancient Lake Baikal is characterized by an outstanding diversity of endemic faunas with more than 350 amphipod species and subspecies. We determined the genetic diversity within the endemic littoral amphipod species Eulimnogammarus verrucosus, E. cyaneus and E. vittatus and investigated whether within those species genetically separate populations occur across Lake Baikal. Gammarus lacustris from water bodies in the Baikal area was examined for comparison. RESULTS: Genetic diversities within a species were determined based on fragments of cytochrome c oxidase I (COI) and for E. verrucosus additionally of 18S rDNA. Highly location-specific haplogroups of E. verrucosus and E. vittatus were found at the southern and western shores of Baikal that are separated by the Angara River outflow; E. verrucosus from the eastern shore formed a further, clearly distinct haplotype cluster possibly confined by the Selenga River and Angarskiy Sor deltas. The genetic diversities within these haplogroups were lower than between the different haplogroups. Intraspecific genetic diversities within E. verrucosus and E. vittatus with 13 and 10%, respectively, were similar to interspecies differences indicating the occurrence of cryptic, morphologically highly similar species; for E. verrucosus this was confirmed with 18S rDNA. The haplotypes of E. cyaneus and G. lacustris specimens were with intraspecific genetic distances of 3 and 2%, respectively, more homogeneous indicating no or only recent disruption of gene flow of E. cyaneus across Baikal and recent colonization of water bodies around Baikal by G. lacustris. CONCLUSIONS: Our finding of separation of subgroups of Baikal endemic amphipods to different degrees points to a species-specific ability of dispersal across areas with adverse conditions and to potential geographical dispersal barriers in Lake Baikal. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12862-019-1470-8) contains supplementary material, which is available to authorized users.
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spelling pubmed-66132522019-07-17 Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species Gurkov, Anton Rivarola-Duarte, Lorena Bedulina, Daria Fernández Casas, Irene Michael, Hendrik Drozdova, Polina Nazarova, Anna Govorukhina, Ekaterina Timofeyev, Maxim Stadler, Peter F. Luckenbach, Till BMC Evol Biol Research Article BACKGROUND: The ancient Lake Baikal is characterized by an outstanding diversity of endemic faunas with more than 350 amphipod species and subspecies. We determined the genetic diversity within the endemic littoral amphipod species Eulimnogammarus verrucosus, E. cyaneus and E. vittatus and investigated whether within those species genetically separate populations occur across Lake Baikal. Gammarus lacustris from water bodies in the Baikal area was examined for comparison. RESULTS: Genetic diversities within a species were determined based on fragments of cytochrome c oxidase I (COI) and for E. verrucosus additionally of 18S rDNA. Highly location-specific haplogroups of E. verrucosus and E. vittatus were found at the southern and western shores of Baikal that are separated by the Angara River outflow; E. verrucosus from the eastern shore formed a further, clearly distinct haplotype cluster possibly confined by the Selenga River and Angarskiy Sor deltas. The genetic diversities within these haplogroups were lower than between the different haplogroups. Intraspecific genetic diversities within E. verrucosus and E. vittatus with 13 and 10%, respectively, were similar to interspecies differences indicating the occurrence of cryptic, morphologically highly similar species; for E. verrucosus this was confirmed with 18S rDNA. The haplotypes of E. cyaneus and G. lacustris specimens were with intraspecific genetic distances of 3 and 2%, respectively, more homogeneous indicating no or only recent disruption of gene flow of E. cyaneus across Baikal and recent colonization of water bodies around Baikal by G. lacustris. CONCLUSIONS: Our finding of separation of subgroups of Baikal endemic amphipods to different degrees points to a species-specific ability of dispersal across areas with adverse conditions and to potential geographical dispersal barriers in Lake Baikal. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12862-019-1470-8) contains supplementary material, which is available to authorized users. BioMed Central 2019-07-08 /pmc/articles/PMC6613252/ /pubmed/31286865 http://dx.doi.org/10.1186/s12862-019-1470-8 Text en © The Author(s). 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Gurkov, Anton
Rivarola-Duarte, Lorena
Bedulina, Daria
Fernández Casas, Irene
Michael, Hendrik
Drozdova, Polina
Nazarova, Anna
Govorukhina, Ekaterina
Timofeyev, Maxim
Stadler, Peter F.
Luckenbach, Till
Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species
title Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species
title_full Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species
title_fullStr Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species
title_full_unstemmed Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species
title_short Indication of ongoing amphipod speciation in Lake Baikal by genetic structures within endemic species
title_sort indication of ongoing amphipod speciation in lake baikal by genetic structures within endemic species
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6613252/
https://www.ncbi.nlm.nih.gov/pubmed/31286865
http://dx.doi.org/10.1186/s12862-019-1470-8
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