Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France

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2018
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Abstract
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.
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costanzi2018agriculturalscientific Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Costanzi, Jean-Marc;Mège, Pascal;Boissinot, Alexandre;Isselin-Nondedeu, Francis;Guérin, Sandra;Lourdais, Olivier;Trochet, Audrey;Petitcorps, Quentin Le;Legrand, Agathe;Varenne, François;Grillet, Pierre;Morin-Pinaud, Sophie;Picard, Damien;
Journal Scientific reports
Year 2018
DOI
DOI not found
URL
http://link.springer.com/article/10.1038/s41598-018-32514-y
Keywords
Nursing Medicine Science general. including nature conservation, geographical distribution management. industrial management technological innovations. automation transportation and communications naval architecture. shipbuilding. marine engineering canals and inland navigation. waterways ocean engineering economic geography of the oceans (general)

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