Seasonal flooding regime and ecological traits influence genetic structure of two small rodents

Although codistributed species are affected by the same abiotic factors, such as rivers and seasonal flooding regimes, ecological traits, such as locomotion habits and habitat preferences, may also influence differences in levels of genetic diversity and differentiation. We examined population genet...

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Main Authors:	Rocha, Rita Gomes, Ferreira, Eduardo, Fonseca, Carlos, Justino, Juliana, Leite, Yuri Luiz Reis, Costa, Leonora Pires
Format:	Online
Language:	English
Published:	Blackwell Publishing Ltd 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4278813/

id	pubmed-4278813
recordtype	oai_dc
spelling	pubmed-42788132015-01-02 Seasonal flooding regime and ecological traits influence genetic structure of two small rodents Rocha, Rita Gomes Ferreira, Eduardo Fonseca, Carlos Justino, Juliana Leite, Yuri Luiz Reis Costa, Leonora Pires Original Research Although codistributed species are affected by the same abiotic factors, such as rivers and seasonal flooding regimes, ecological traits, such as locomotion habits and habitat preferences, may also influence differences in levels of genetic diversity and differentiation. We examined population genetic structure and diversity of Hylaeamys megacephalus and Oecomys aff. roberti, two cricetid rodent species from the mid-Araguaia River in central Brazil, using mitochondrial DNA sequence data. Specifically, we aim to test whether the Araguaia River acts as a barrier to the gene flow of these two species and to assess how ecological traits, such as locomotion habits and habitat preferences, may influence differences in levels of genetic diversity and differentiation. As both species occur in flooded forests, neither showed genetic differences related to river banks. Oecomys aff. roberti showed stronger population structure that appears to be associated with isolation by distance. This arboreal species maintained stable populations in the Araguaia River, while the terrestrial H. megacephalus was more affected by seasonal floods, resulting in a genetic signature of population expansion. Our initial predictions were largely supported by our results given that locomotion habits and habitat preferences of each species appears to have played a role on the genetic structure of these two sympatric rodent species. Blackwell Publishing Ltd 2014-12 2014-11-30 /pmc/articles/PMC4278813/ /pubmed/25558355 http://dx.doi.org/10.1002/ece3.1336 Text en © 2014 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Rocha, Rita Gomes Ferreira, Eduardo Fonseca, Carlos Justino, Juliana Leite, Yuri Luiz Reis Costa, Leonora Pires
spellingShingle	Rocha, Rita Gomes Ferreira, Eduardo Fonseca, Carlos Justino, Juliana Leite, Yuri Luiz Reis Costa, Leonora Pires Seasonal flooding regime and ecological traits influence genetic structure of two small rodents
author_facet	Rocha, Rita Gomes Ferreira, Eduardo Fonseca, Carlos Justino, Juliana Leite, Yuri Luiz Reis Costa, Leonora Pires
author_sort	Rocha, Rita Gomes
title	Seasonal flooding regime and ecological traits influence genetic structure of two small rodents
title_short	Seasonal flooding regime and ecological traits influence genetic structure of two small rodents
title_full	Seasonal flooding regime and ecological traits influence genetic structure of two small rodents
title_fullStr	Seasonal flooding regime and ecological traits influence genetic structure of two small rodents
title_full_unstemmed	Seasonal flooding regime and ecological traits influence genetic structure of two small rodents
title_sort	seasonal flooding regime and ecological traits influence genetic structure of two small rodents
description	Although codistributed species are affected by the same abiotic factors, such as rivers and seasonal flooding regimes, ecological traits, such as locomotion habits and habitat preferences, may also influence differences in levels of genetic diversity and differentiation. We examined population genetic structure and diversity of Hylaeamys megacephalus and Oecomys aff. roberti, two cricetid rodent species from the mid-Araguaia River in central Brazil, using mitochondrial DNA sequence data. Specifically, we aim to test whether the Araguaia River acts as a barrier to the gene flow of these two species and to assess how ecological traits, such as locomotion habits and habitat preferences, may influence differences in levels of genetic diversity and differentiation. As both species occur in flooded forests, neither showed genetic differences related to river banks. Oecomys aff. roberti showed stronger population structure that appears to be associated with isolation by distance. This arboreal species maintained stable populations in the Araguaia River, while the terrestrial H. megacephalus was more affected by seasonal floods, resulting in a genetic signature of population expansion. Our initial predictions were largely supported by our results given that locomotion habits and habitat preferences of each species appears to have played a role on the genetic structure of these two sympatric rodent species.
publisher	Blackwell Publishing Ltd
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4278813/
_version_	1613171398938722304

Seasonal flooding regime and ecological traits influence genetic structure of two small rodents

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