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When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates

BACKGROUND: While the impact of climate fluctuations on the demographic histories of species caused by changes in habitat availability is well studied, populations of species from systems without geographic isolation have received comparatively little attention. Using CO1 mitochondrial sequences, we...

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Autores principales: Fazalova, Varvara, Nevado, Bruno, Peretolchina, Tatiana, Petunina, Jeanna, Sherbakov, Dmitry
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2993716/
https://www.ncbi.nlm.nih.gov/pubmed/20969796
http://dx.doi.org/10.1186/1471-2148-10-320
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author Fazalova, Varvara
Nevado, Bruno
Peretolchina, Tatiana
Petunina, Jeanna
Sherbakov, Dmitry
author_facet Fazalova, Varvara
Nevado, Bruno
Peretolchina, Tatiana
Petunina, Jeanna
Sherbakov, Dmitry
author_sort Fazalova, Varvara
collection PubMed
description BACKGROUND: While the impact of climate fluctuations on the demographic histories of species caused by changes in habitat availability is well studied, populations of species from systems without geographic isolation have received comparatively little attention. Using CO1 mitochondrial sequences, we analysed phylogeographic patterns and demographic histories of populations of five species (four gastropod and one amphipod species) co-occurring in the southwestern shore of Lake Baikal, an area where environmental oscillations have not resulted in geographical isolation of habitats. RESULTS: Species with stronger habitat preferences (gastropods B. turriformis, B. carinata and B. carinatocostata) exhibit rather stable population sizes through their evolutionary history, and their phylogeographic pattern indicates moderate habitat fragmentation. Conversely, species without strong habitat preference (gastropod M. herderiana and amphipod G. fasciatus) exhibit haplotype networks with a very abundant and widespread central haplotype and a big number of singleton haplotypes, while their reconstructed demographic histories show a population expansion starting about 25-50 thousand years ago, a period marked by climate warming and increase in diatom abundance as inferred from bottom-lake sedimentary cores. CONCLUSIONS: In agreement with previous studies, we found that species reacted differently to the same environmental changes. Our results highlight the important role of dispersal ability and degree of ecological specialization in defining a species' response to environmental changes.
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spelling pubmed-29937162010-11-30 When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates Fazalova, Varvara Nevado, Bruno Peretolchina, Tatiana Petunina, Jeanna Sherbakov, Dmitry BMC Evol Biol Research Article BACKGROUND: While the impact of climate fluctuations on the demographic histories of species caused by changes in habitat availability is well studied, populations of species from systems without geographic isolation have received comparatively little attention. Using CO1 mitochondrial sequences, we analysed phylogeographic patterns and demographic histories of populations of five species (four gastropod and one amphipod species) co-occurring in the southwestern shore of Lake Baikal, an area where environmental oscillations have not resulted in geographical isolation of habitats. RESULTS: Species with stronger habitat preferences (gastropods B. turriformis, B. carinata and B. carinatocostata) exhibit rather stable population sizes through their evolutionary history, and their phylogeographic pattern indicates moderate habitat fragmentation. Conversely, species without strong habitat preference (gastropod M. herderiana and amphipod G. fasciatus) exhibit haplotype networks with a very abundant and widespread central haplotype and a big number of singleton haplotypes, while their reconstructed demographic histories show a population expansion starting about 25-50 thousand years ago, a period marked by climate warming and increase in diatom abundance as inferred from bottom-lake sedimentary cores. CONCLUSIONS: In agreement with previous studies, we found that species reacted differently to the same environmental changes. Our results highlight the important role of dispersal ability and degree of ecological specialization in defining a species' response to environmental changes. BioMed Central 2010-10-23 /pmc/articles/PMC2993716/ /pubmed/20969796 http://dx.doi.org/10.1186/1471-2148-10-320 Text en Copyright ©2010 Fazalova et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Fazalova, Varvara
Nevado, Bruno
Peretolchina, Tatiana
Petunina, Jeanna
Sherbakov, Dmitry
When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates
title When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates
title_full When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates
title_fullStr When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates
title_full_unstemmed When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates
title_short When environmental changes do not cause geographic separation of fauna: differential responses of Baikalian invertebrates
title_sort when environmental changes do not cause geographic separation of fauna: differential responses of baikalian invertebrates
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2993716/
https://www.ncbi.nlm.nih.gov/pubmed/20969796
http://dx.doi.org/10.1186/1471-2148-10-320
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