10.5061/DRYAD.5N7F6
Salisbury, Sarah J.
Dalhousie University
McCracken, Gregory R.
Dalhousie University
Keefe, Donald
Department of Environment and Conservation
Perry, Robert
Department of Environment and Conservation
Ruzzante, Daniel E.
Dalhousie University
Data from: A portrait of a sucker using landscape genetics: how
colonization and life history undermine the idealized dendritic
metapopulation
Dryad
dataset
2016
migration-drift equilibrium
generation time
Catostomus catostomus
colonization history
dendritic metapopulation
2016-07-08T13:03:05Z
2016-07-08T13:03:05Z
en
https://doi.org/10.1111/mec.13757
153995 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Dendritic metapopulations have been attributed unique properties by in
silico studies, including an elevated genetic diversity relative to a
panmictic population of equal total size. These predictions have not been
rigorously tested in nature, nor has there been full consideration of the
interacting effects among contemporary landscape features, colonization
history and life history traits of the target species. We tested for the
effects of dendritic structure as well as the relative importance of life
history, environmental barriers and historical colonization on the neutral
genetic structure of a longnose sucker (Catostomus catostomus)
metapopulation in the Kogaluk watershed of northern Labrador, Canada.
Samples were collected from eight lakes, genotyped with 17
microsatellites, and aged using opercula. Lakes varied in differentiation,
historical and contemporary connectivity, and life history traits.
Isolation by distance was detected only by removing two highly genetically
differentiated lakes, suggesting a lack of migration–drift equilibrium and
the lingering influence of historical factors on genetic structure.
Bayesian analyses supported colonization via the Kogaluk's
headwaters. The historical concentration of genetic diversity in
headwaters inferred by this result was supported by high historical and
contemporary effective sizes of the headwater lake, T-Bone. Alternatively,
reduced allelic richness in headwaters confirmed the dendritic
structure's influence on gene flow, but this did not translate to an
elevated metapopulation effective size. A lack of equilibrium and upstream
migration may have dampened the effects of dendritic structure. We suggest
that interacting historical and contemporary factors prevent the
achievement of the idealized traits of a dendritic metapopulation in
nature.
Salisbury et al. 2016 Data Accession"Catostomus catostomus scores for
Salisbury et al. 2016.xlsx" contains scores for 869 Catostomus
catostomus samples at 17 microsatellite markers. Samples were collected in
the Kogaluk River, Labrador, Newfoundland. Row 1 indicates markers, column
A indicates individuals, column B indicates lake. Missing scores are
denoted by "0". "Pairwise Genetic, Geographic, Elevation
Distances for Catostomus catostomus samples from Salisbury et al.
2016.xlsx" contains pairwise Fsts, geographic, and elevation
distances among Catostomus catostomus samples collected within 8 lakes in
the Kogaluk River, Labrador, Newfoundland.
Newfoundland
Labrador