Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France
Abstract Amphibians are particularly sensitive to landscape fragmentation. Potential barriers between breeding sites can negatively influence the dispersal of individuals and increase genetic structure between populations. In this study, we genotyped 10 microsatellites for 334 marbled newts (Trituru...
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oai:doaj.org-article:001a645bca554a28b9b773936dfb62692021-12-02T15:08:50ZAgricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France10.1038/s41598-018-32514-y2045-2322https://doaj.org/article/001a645bca554a28b9b773936dfb62692018-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-32514-yhttps://doaj.org/toc/2045-2322Abstract Amphibians are particularly sensitive to landscape fragmentation. Potential barriers between breeding sites can negatively influence the dispersal of individuals and increase genetic structure between populations. In this study, we genotyped 10 microsatellites for 334 marbled newts (Triturus marmoratus) at 11 different locations in Western France. Samples were collected in different regions with contrasting agricultural landscapes (low and high proportion of arable land in the north and south, respectively). We found a strong genetic structure between the northern and southern sampling sites. Isolation by distance was recorded after 62 km, but within the northern region, little or no genetic structure was detected over large distances (up to 114 km). Genetic structure at shorter distance (43 km) was found between sites situated in landscapes with larger amounts of arable lands. A significant positive relationship was found between the pairwise genetic distance (Fst) between sites and the amount of arable land together with the distance between sites. Our results suggest that the Loire River might act as a corridor for the marbled newt, while arable land might act as a barrier. Finally, although a large city is located between sampling sites, no effect was detected on population structure.Jean-Marc CostanziPascal MègeAlexandre BoissinotFrancis Isselin-NondedeuSandra GuérinOlivier LourdaisAudrey TrochetQuentin Le PetitcorpsAgathe LegrandFrançois VarennePierre GrilletSophie Morin-PinaudDamien PicardNature PortfolioarticleMarbled NewtLoire RiverDiscriminant Analysis Of Principal Components (DAPC)DAPC ResultsLarge Crop FieldsMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018) |
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Marbled Newt Loire River Discriminant Analysis Of Principal Components (DAPC) DAPC Results Large Crop Fields Medicine R Science Q |
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Marbled Newt Loire River Discriminant Analysis Of Principal Components (DAPC) DAPC Results Large Crop Fields Medicine R Science Q Jean-Marc Costanzi Pascal Mège Alexandre Boissinot Francis Isselin-Nondedeu Sandra Guérin Olivier Lourdais Audrey Trochet Quentin Le Petitcorps Agathe Legrand François Varenne Pierre Grillet Sophie Morin-Pinaud Damien Picard Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France |
| description |
Abstract Amphibians are particularly sensitive to landscape fragmentation. Potential barriers between breeding sites can negatively influence the dispersal of individuals and increase genetic structure between populations. In this study, we genotyped 10 microsatellites for 334 marbled newts (Triturus marmoratus) at 11 different locations in Western France. Samples were collected in different regions with contrasting agricultural landscapes (low and high proportion of arable land in the north and south, respectively). We found a strong genetic structure between the northern and southern sampling sites. Isolation by distance was recorded after 62 km, but within the northern region, little or no genetic structure was detected over large distances (up to 114 km). Genetic structure at shorter distance (43 km) was found between sites situated in landscapes with larger amounts of arable lands. A significant positive relationship was found between the pairwise genetic distance (Fst) between sites and the amount of arable land together with the distance between sites. Our results suggest that the Loire River might act as a corridor for the marbled newt, while arable land might act as a barrier. Finally, although a large city is located between sampling sites, no effect was detected on population structure. |
| format |
article |
| author |
Jean-Marc Costanzi Pascal Mège Alexandre Boissinot Francis Isselin-Nondedeu Sandra Guérin Olivier Lourdais Audrey Trochet Quentin Le Petitcorps Agathe Legrand François Varenne Pierre Grillet Sophie Morin-Pinaud Damien Picard |
| author_facet |
Jean-Marc Costanzi Pascal Mège Alexandre Boissinot Francis Isselin-Nondedeu Sandra Guérin Olivier Lourdais Audrey Trochet Quentin Le Petitcorps Agathe Legrand François Varenne Pierre Grillet Sophie Morin-Pinaud Damien Picard |
| author_sort |
Jean-Marc Costanzi |
| title |
Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France |
| title_short |
Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France |
| title_full |
Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France |
| title_fullStr |
Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France |
| title_full_unstemmed |
Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France |
| title_sort |
agricultural landscapes and the loire river influence the genetic structure of the marbled newt in western france |
| publisher |
Nature Portfolio |
| publishDate |
2018 |
| url |
https://doaj.org/article/001a645bca554a28b9b773936dfb6269 |
| work_keys_str_mv |
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