Nov 7, 2018

Genetic structure in the wood mouse and the bank vole: contrasting patterns in a human-modified and highly fragmented landscape

BioRxiv : the Preprint Server for Biology
Roberto BielloGiorgio Bertorelle

Abstract

Habitat fragmentation related to human activities modifies the distribution and the demographic trajectory of a species, often leading to genetic erosion and increased extinction risks. Understanding the impact of fragmentation on different species that co-exist in the same area becomes extremely important. Here we estimated the impact produced by different natural and anthropic landscape features on gene flow patterns in two sympatric species sampled in the same locations. Our main goal was to identify shared and private factors in the comparison among species. 199 bank voles and 194 wood mice were collected in 15 woodlands in a fragmented landscape, and genotyped at 8 and 7 microsatellites, respectively. Genetic variation and structure were analysed with standard approaches. Effective migration surfaces, isolation by resistance analysis, and regression with randomization were used to study isolation by distance and to estimate the relative importance of land cover elements on gene flow. Genetic structure was similarly affected by isolation by distance in these species, but the isolation-by-resistance analysis suggests that i) the wood mouse has constrained patterns of dispersal across woodland patches and facilitated connecti...Continue Reading

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Mentioned in this Paper

Study
Short Tandem Repeat
Patterns
Area
Abnormal Fragmented Structure
Isolation Aspects
Erosion Lesion
Genetic Activator
Contrast Used
Superficial Ulcer

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