English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/78165
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Phylogeography and postglacial expansion of the endangered semi-aquatic mammal Galemys pyrenaicus

AuthorsIgea, Javier ; Aymerich, Pere; Fernández-González, Angel; González-Esteban, Jorge; Gómez, Asunción; Alonso, Rocío; Gosálbez, Joaquim; Castresana, José
KeywordsConservation genetics
Introns
Mammals
Mitochondrial genes
Nuclear genes
Pyrenean desman
Niche modeling
Iberian Peninsula
Endemism
Issue Date6-Jun-2013
PublisherBioMed Central
CitationBMC Evolutionary Biology 13(1): 115 (2013)
Abstract[Background] Species with strict ecological requirements may provide new insights into the forces that shaped the geographic variation of genetic diversity. The Pyrenean desman, Galemys pyrenaicus, is a small semi-aquatic mammal that inhabits clean streams of the northern half of the Iberian Peninsula and is endangered in most of its geographic range, but its genetic structure is currently unknown. While the stringent ecological demands derived from its aquatic habitat might have caused a partition of the genetic diversity among river basins, Pleistocene glaciations would have generated a genetic pattern related to glacial refugia.
[Results] To study the relative importance of historical and ecological factors in the genetic structure of G. pyrenaicus, we used mitochondrial and intronic sequences of specimens covering most of the species range. We show, first, that the Pyrenean desman has very low levels of genetic diversity compared to other mammals. In addition, phylogenetic and dating analyses of the mitochondrial sequences reveal a strong phylogeographic structure of a Middle Pleistocene origin, suggesting that the main lineages arose during periods of glacial isolation. Furthermore, both the spatial distribution of nuclear and mitochondrial diversity and the results of species distribution modeling suggest the existence of a major glacial refugium in the northwestern part of the Iberian Peninsula. Finally, the main mitochondrial lineages show a striking parapatric distribution without any apparent exchange of mitochondrial haplotypes between the lineages that came into secondary contact (although with certain permeability to nuclear genes), indicating incomplete mixing after the post-glacial recolonization. On the other hand, when we analyzed the partition of the genetic diversity among river basins, the Pyrenean desman showed a lower than expected genetic differentiation among main rivers.
[Conclusions] The analysis of mitochondrial and intronic markers in G. pyrenaicus showed the predominant effects of Pleistocene glaciations on the genetic structure of this species, while the distribution of the genetic diversity was not greatly influenced by the main river systems. These results and, particularly, the discovery of a marked phylogeographic structure, may have important implications for the conservation of the Pyrenean desman.
Publisher version (URL)http://dx.doi.org/10.1186/1471-2148-13-115
URIhttp://hdl.handle.net/10261/78165
DOI10.1186/1471-2148-13-115
E-ISSN1471-2148
Appears in Collections:(IBE) Artículos
Files in This Item:
File Description SizeFormat 
1471-2148-13-115.xml150,67 kBXMLView/Open
1471-2148-13-115-S1.PDF680,8 kBAdobe PDFThumbnail
View/Open
1471-2148-13-115.pdf2,39 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.