Genetic similarity as a measure for connectivity between fragmented populations of the moor frog ( )

Genetic differentiation among populations of the moor frog ( Rana arvalis ) was tested on a spatial scale where some dispersal between populations is expected to occur, in a landscape in The Netherlands that has become fragmented fairly recently, in the 1930s. Five microsatellite loci were used, wit...

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Bibliographic Details
Published in:Heredity 2001-05, Vol.86 (5), p.598-608
Main Authors: Vos, C C, Antonisse-de Jong, A G, Goedhart, P W, Smulders, M J M
Format: Article
Language:English
Subjects:
amfibieën
Amphibians
Animals
Biomedical and Life Sciences
Biomedicine
Cytogenetics
Dispersal
Ecology
Environment
Evolutionary Biology
fauna
Freshwater
gene flow
genetic differentiation
Genetic Variation - genetics
genetica
Genetics, Population
Geography
herpetologie
Human Genetics
kikkers
landscape resistance
landschapsecologie
metapopulation
microsatellite marker
Microsatellite Repeats - genetics
Netherlands
original-article
Phylogeny
Plant Genetics and Genomics
Polymerase Chain Reaction
Polymorphism, Genetic - genetics
populatiebiologie
Rana arvalis
Ranidae - genetics
versnippering
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Summary:Genetic differentiation among populations of the moor frog ( Rana arvalis ) was tested on a spatial scale where some dispersal between populations is expected to occur, in a landscape in The Netherlands that has become fragmented fairly recently, in the 1930s. Five microsatellite loci were used, with 2–8 alleles per locus. F IS was 0.049 across loci, and most populations were in HW equilibrium. The degree of population subdivision was low ( F ST =0.052). A significant positive correlation between genetic distance and geographical distance was found, indicating a limitation in dispersal among populations due to distance. To test the impact of the landscape mosaic on the connectivity between patches, distance measures were corrected for relative amounts of habitat types with known positive or negative influence on moor frog dispersal. Notably, the resistance variable for the fraction of negative linear elements (roads and railways) gave a higher explanatory value than geographical distance itself. Therefore, it is particularly the number of barriers (roads and railways) between populations that emerges as a factor that reduces exchange between populations. It is concluded that genetic techniques show promise in determining the influence of landscape connectivity on animal dispersal.
ISSN:0018-067X
1365-2540
0018-067X
DOI:10.1046/j.1365-2540.2001.00865.x