NDLI: Landscape genetics of the Alpine newt (Mesotriton alpestris) inferred from a strip-based approach

Content Provider	Springer Nature Link
Author	Emaresi, Guillaume Pellet, Jérôme Dubey, Sylvain Hirzel, Alexandre H. Fumagalli, Luca
Copyright Year	2009
Abstract	Habitat destruction and fragmentation are known to strongly affect dispersal by altering the quality of the environment between populations. As a consequence, lower landscape connectivity is expected to enhance extinction risks through a decrease in gene flow and the resulting negative effects of genetic drift, accumulation of deleterious mutations and inbreeding depression. Such phenomena are particularly harmful for amphibian species, characterized by disjunct breeding habitats. The dispersal behaviour of amphibians being poorly understood, it is crucial to develop new tools, allowing us to determine the influence of landscape connectivity on the persistence of populations. In this study, we developed a new landscape genetics approach that aims at identifying land-uses affecting genetic differentiation, without a priori assumptions about associated ecological costs. We surveyed genetic variation at seven microsatellite loci for 19 Alpine newt (Mesotriton alpestris) populations in western Switzerland. Using strips of varying widths that define a dispersal corridor between pairs of populations, we were able to identify land-uses that act as dispersal barriers (i.e. urban areas) and corridors (i.e. forests). Our results suggest that habitat destruction and landscape fragmentation might in the near future affect common species such as M. alpestris. In addition, by identifying relevant landscape variables influencing population structure without unrealistic assumptions about dispersal, our method offers a simple and flexible tool of investigation as an alternative to least-cost models and other approaches.
Starting Page	41
Ending Page	50
Page Count	10
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	12
Issue Number	1
e-ISSN	15729737
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-09-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fragmentation Landscape genetics Anthropogenic land-uses Microsatellites Amphibians Dispersal Plant Sciences Evolutionary Biology Conservation Biology/Ecology Animal Anatomy / Morphology / Histology
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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