10.5061/DRYAD.G2B4H
Richmond, Jonathan Q.
United States Geological Survey
Barr, Kelly R.
United States Geological Survey
Backlin, Adam R.
United States Geological Survey
Vandergast, Amy G.
United States Geological Survey
Fisher, Robert N.
United States Geological Survey
Data from: Evolutionary dynamics of a rapidly receding southern range
boundary in the threatened California Red-Legged Frog (Rana draytonii)
Dryad
dataset
2013
Rana draytonii
Wildlife Management
2013-02-26T19:50:44Z
2013-02-26T19:50:44Z
en
https://doi.org/10.1111/eva.12067
49685 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Populations forming the edge of a species range are often imperiled by
isolation and low genetic diversity, with proximity to human population
centers being a major determinant of edge stability in modern landscapes.
Since the 1960s, the California red-legged frog (Rana draytonii) has
undergone extensive declines in heavily urbanized southern California,
where the range edge has rapidly contracted northward while shifting its
cardinal orientation to an east-west trending axis. We studied the genetic
structure and diversity of these frontline populations, tested for
signatures of contemporary disturbance, specifically fire, and attempted
to disentangle these signals from demographic events extending deeper into
the past. Consistent with the genetic expectations of the
‘abundant-center’ model, we found that diversity, admixture, and
opportunity for random mating increases in populations sampled
successively further away from the range boundary. Demographic simulations
indicate that bottlenecks in peripheral isolates are associated with
processes extending tens to a few hundred generations in the past, despite
the demographic collapse of some due to recent fire-flood events. While
the effects of recent disturbance have left little genetic imprint on
these populations, they likely contribute to an extinction debt that will
lead to continued range contraction unless management intervenes to stall
or reverse the process.
EVA-2012-178-OA_msat_DATARaw allele scores for 15 microsatellite loci
developed from a species-specific library for Rana draytonii. The data
file is formatted for Convert v.1.31 (Glaubitz, JC. 2004. Molecular
Ecology Notes 4:309-310). Locus names match those in Table S1 of the
electronic supplementary materials (linked to the article on the
Evolutionary Applications website). Population identifiers match sampling
localities detailed in Figure 1 in the paper. Asterisks denote missing
data.
southern California
United States