A MULTILOCUS PERSPECTIVE ON COLONIZATION ACCOMPANIED BY SELECTION AND GENE FLOW

@inproceedings{Rosenblum2007AMP,
  title={A MULTILOCUS PERSPECTIVE ON COLONIZATION ACCOMPANIED BY SELECTION AND GENE FLOW},
  author={Erica Bree Rosenblum and Michael J. Hickerson and Craig C Moritz},
  booktitle={Evolution; international journal of organic evolution},
  year={2007}
}
Abstract The colonization of novel habitats involves complex interactions between founder events, selection, and ongoing migration, and can lead to diverse evolutionary outcomes from local extinction to adaptation to speciation. Although there have been several studies of the demography of colonization of remote habitats, less is known about the demographic consequences of colonization of novel habitats within a continuous species range. Populations of the Eastern Fence Lizard, Sceloporus… Expand
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References

SHOWING 1-10 OF 69 REFERENCES
Convergent Evolution and Divergent Selection: Lizards at the White Sands Ecotone
TLDR
This work investigates the role of gene flow in modulating phenotypic response to selection by quantifying color variation and genetic variation across the ecotone and finds species differences in degree of background matching and in genetic connectivity of populations across the Ecotone. Expand
Genetic Response to Climatic Change: Insights from Ancient DNA and Phylochronology
TLDR
A study of population variation by directly tracking genetic change and population size in two geographically widespread mammal species during late-Holocene climatic change, which indicates that some species will exhibit declining gene diversity as expected from simple population genetic models, whereas others will not. Expand
THE ROLE OF GENETIC VARIATION IN ADAPTATION AND POPULATION PERSISTENCE IN A CHANGING ENVIRONMENT
  • R. Lande, S. Shannon
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 1996
TLDR
It is shown that in constant or unpredictable environments genetic variability reduces population mean fitness and increases the risk of extinction, and in predictable, highly variable environments genetic variance may be essential for adaptive evolution and population persistence. Expand
DOES GENE FLOW CONSTRAIN ADAPTIVE DIVERGENCE OR VICE VERSA? A TEST USING ECOMORPHOLOGY AND SEXUAL ISOLATION IN TIMEMA CRISTINAE WALKING‐STICKS
  • P. Nosil, B. Crespi
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 2004
TLDR
Results indicate that morphological divergence in T. cristinae reflects a balance between the effects of host‐specific natural selection and gene flow, and that data on mating preferences can help determine the causal associations between trait divergence and levels of gene flow. Expand
The population ecology of contemporary adaptations: what empirical studies reveal about the conditions that promote adaptive evolution
TLDR
It is suggested that opportunities for population growth may be a key factor that promotes rapid evolution, since directional selection might otherwise be expected to cause population decline and create the potential for local extinction, which is an ever-present alternative to local adaptation. Expand
Bayesian Estimation of the Timing and Severity of a Population Bottleneck from Ancient DNA
TLDR
This study demonstrates the persistence of a species depauperate in genetic diversity for at least 2,000 y and has implications for modes of speciation in the incredibly diverse rodent genus Ctenomys. Expand
A Model of Population Growth, Dispersal and Evolution in a Changing Environment
The climatic and biotic conditions at any geographic location will change through time, for example, because of the advance of glaciers. If it is to avoid extinction, a species adapted to a movingExpand
Matrix Correspondence Tests on the DNA Phylogeny of the Tenerife Lacertid Elucidate both Historical Causes and Morphological Adaptation
TLDR
Tests on the DNA phylogeny based primarily on population data from 57 localities on Tenerife support the hypothesis that there were populations on two putative precursor islands that have come into secondary contact and intro- gressed after these islands were joined to form Tenerives by the eruption of the Canadas edifice. Expand
Combining demographic, environmental and genetic data to test hypotheses about colonization events in metapopulations
TLDR
A method for making inferences about the factors that influence colonization processes in natural populations is described and it is demonstrated that it can identify accurately those factors that are most important for the founding of new populations, even when genetic differentiation among source populations is low. Expand
GENETIC ANALYSIS OF COMPLEX DEMOGRAPHIC SCENARIOS: SPATIALLY EXPANDING POPULATIONS OF THE CANE TOAD, BUFO MARINUS
TLDR
The method presented here is the only robust, model‐based method available so far, which allows inferring complex population dynamics over a short time scale and provides the basis for investigating the interplay between population dynamics, drift, and selection in invasive species. Expand
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