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302 results for “population dispersal”
Biophysical data for: Dispersive currents explain patterns of population connectivity in an ecologically and economically important fish
<p><span>How to identify the drivers of population connectivity remains a fundamental question in ecology and evolution. Answering this question can be challenging in aquatic environments where dynamic lake and ocean currents coupled with high levels of dispersal and gene flow can decrease the utility of modern population genetic tools. To address this challenge, we used RAD-Seq to genotype 959 yellow perch (<em>Perca flavescens</em>), a species with an ~40-day pelagic larval duration (PLD), collected from 20 sites circumscribing Lake Michigan. We also developed a novel, integrative approach that couples detailed biophysical models with eco-genetic agent-based models to generate 'predictive' values of genetic differentiation. By comparing predictive and empirical values of genetic differentiation, we estimated the relative contributions for known drivers of population connectivity (<em>e.g</em>., currents, behavior, PLD). For the main basin populations (<em>i.e</em>., the largest contiguous portion of the lake), we found that high gene flow led to low overall levels of genetic differentiation among populations (<em>F<sub>ST</sub></em> = 0.003). By far the best predictors of genetic differentiation were connectivity matrices that were derived from periods of time when there were strong and highly dispersive currents. Thus, these highly dispersive currents are driving the patterns of population connectivity in the main basin. We also found that populations from the northern and southern main basin are slightly divergent from one another, while those from Green Bay and the main basin are highly divergent (<em>F<sub>ST</sub></em> = 0.11). By integrating biophysical and eco-genetic models with genome-wide data, we illustrate that the drivers of population connectivity can be identified in high gene flow systems.</span></p>
Data from: Evolutionarily labile dispersal behavior and discontinuous habitats enhance population differentiation in island vs continentally distributed swallows
<p class="MsoNormal"><span>The causes of population divergence in vagile groups remain a paradox in evolutionary biology: dispersive species should be able to colonize new areas, a prerequisite for allopatric speciation, but dispersal also facilitates gene flow, which erodes population differentiation. Strong dispersal ability has been suggested to enhance divergence in patchy habitats and inhibit divergence in continuous landscapes, but empirical support for this hypothesis is lacking. Here we compared patterns of population divergence in a dispersive clade of swallows distributed across both patchy and continuous habitats. The Pacific Swallow (</span><em>Hirundo tahitica</em><span>) has an insular distribution throughout Southeast Asia and the Pacific, while its sister species, the Welcome Swallow (</span><em>H. neoxena</em><span>), has a continental distribution in Australia. We used whole-genome data to demonstrate strong genetic structure and limited introgression among insular populations, but not among continental populations. Demographic models show that historic changes in habitat connectivity have contributed to population structure within the cl</span>ade. Swallows appear to exhibit evolutionarily labile dispersal behavior in which they reduce dispersal propensity after island colonization despite retaining strong flight ability. Our data support the hypothesis that fragmented habitats enhance population differentiation in vagile groups, and suggest that labile dispersal behavior is a key mechanism underlying this pattern.</p>
Landscape genetics of an endangered salt marsh endemic: identifying population continuity and barriers to dispersal
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Urban population structure and dispersal of an Australian mosquito (Aedes notoscriptus) involved in disease transmission
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Data from: Does sex-biased dispersal account for the lack of geographic and host-associated differentiation in introduced populations of an aphid parasitoid?
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Data for: The central Alps comprise a major dispersal barrier between western and eastern populations of two butterfly species
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Data from: Evolutionarily labile dispersal behavior and discontinuous habitats enhance population differentiation in island vs continentally distributed swallows
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Data from: Testing support for the northern and southern dispersal routes out of Africa: an analysis of Levantine and southern Arabian populations
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Reproductive benefits associated with dispersal in headwater populations of Trinidadian guppies (Poecilia reticulata)
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Conditional natal dispersal provides a mechanism for populations tracking resource pulses after fire
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Fine-scale spatial genetic structure, mating and gene flow dispersal patterns in Parkia biglobosa populations under different levels of habitat fragmentation
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Dispersal increases spatial synchrony of populations but has weak effects on population variability: a meta-analysis
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First come, first served: possible role for priority effects in marine populations under different degrees of dispersal potential
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Population assignment tests uncover rare long-distance larval dispersal events
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Data from: High dispersal ability versus migratory traditions: Fine-scale population structure and post-glacial colonization in bar-tailed godwits
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Data from: Dispersal in the sub-Antarctic: king penguins show remarkably little population genetic differentiation across their range
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Data from: genetic evidence of differential dispersal pattern in Asiatic wild dog: comparing populations with different pack size and tiger densities
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Data from: Phoretic dispersal influences parasite population genetic structure
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Using isolation-by-distance to jointly estimate effective population density and dispersal distance: a practical evaluation using bumble bees
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Biophysical larval dispersal models of observed bonefish (Albula vulpes) spawning events in Abaco, The Bahamas: An assessment of population connectivity and ocean dynamics
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.