10.5061/DRYAD.P9F13
Balbi, Manon
French National Centre for Scientific Research
Ernoult, Aude
French National Centre for Scientific Research
Poli, Pedro
French National Centre for Scientific Research
Madec, Luc
French National Centre for Scientific Research
Guiller, Annie
French National Centre for Scientific Research
Martin, Marie-Claire
French National Centre for Scientific Research
Nabucet, Jean
French National Centre for Scientific Research
Beaujouan, Véronique Petit, Eric
Ecologie, Systématique et Evolution
Petit, Eric J.
Ecology and Ecosystem Health
Data from: Functional connectivity in replicated urban landscapes in the
land snail (Cornu aspersum)
Dryad
dataset
2018
isolation by distance
city
Gasteropoda
resistance-based models
Cornu aspersum
2018-01-31T18:53:29Z
2018-01-31T18:53:29Z
en
https://doi.org/10.1111/mec.14521
193308 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Urban areas are highly fragmented and thereby exert strong constraints on
individual dispersal. Despite this, some species manage to persist in
urban areas, such as the garden snail, Cornu aspersum, which is common in
cityscapes despite its low mobility. Using landscape genetic approaches,
we combined study area replication and multi-scale analysis to determine
how landscape composition, configuration, and connectivity influence snail
dispersal across urban areas. At the overall landscape scale, areas with a
high percentage of roads decreased genetic differentiation between
populations. At the population scale, genetic differentiation was
positively linked with building surface, the proportion of borders where
wooded patches and roads appeared side-by-side and the proportion of
borders combining wooded patches and other impervious areas. Analyses
based on pairwise genetic distances validated the isolation-by-distance
and isolation-by-resistance models for this land snail, with an equal fit
to least-cost paths and circuit-theory-based models. Each of the 12
landscapes analyzed separately yielded specific relations to environmental
features, whereas analyses integrating all replicates highlighted general
common effects. Our results suggest that urban transport infrastructures
facilitate passive snail dispersal. At a local scale, corresponding to
active dispersal, unfavorable habitats (wooded and impervious areas)
isolate populations. This work upholds the use of replicated landscapes to
increase the generalizability of landscape genetics results, and shows how
multi-scale analyses provide insight to scale-dependent processes.
Individual microsatellite genotypes of garden snails from three French
citiesThe individual genotypes of 2,609 snails, Cornu aspersum, obtained
from 7 microsatellite markers in 120 populations, from 12 urban landscapes
are given.data_garden_snail.csv
France