Results 211 to 220 of about 27,145 (255)
Diversity patterns in terrestrial tetrapod clades are governed by equilibrium dynamics. [PDF]
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ECOLOGICAL SPECIATION IN GAMBUSIA FISHES
Evolution; International Journal of Organic Evolution, 2007Although theory indicates that natural selection can facilitate speciation as a by-product, demonstrating ongoing speciation via this by-product mechanism in nature has proven difficult. We examined morphological, molecular, and behavioral data to investigate ecology's role in incipient speciation for a post-Pleistocene radiation of Bahamas ...
R Brian Langerhans, Matthew Gifford
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Trends in Ecology & Evolution, 1998
Recent studies on diverse taxa suggest that natural selection caused by shifts in ecology or invasions of novel habitats plays an important role in adaptive divergence and speciation. Exciting new studies integrating approaches from both the field and the laboratory suggest that ecological shifts can result in extremely rapid rates of evolutionary ...
M R, Orr, T B, Smith
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Recent studies on diverse taxa suggest that natural selection caused by shifts in ecology or invasions of novel habitats plays an important role in adaptive divergence and speciation. Exciting new studies integrating approaches from both the field and the laboratory suggest that ecological shifts can result in extremely rapid rates of evolutionary ...
M R, Orr, T B, Smith
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Ecological speciation in dynamic landscapes
Journal of Evolutionary Biology, 2011 Although verbal theories of speciation consider landscape changes, ecological speciation is usually modelled in a fixed geographical arrangement. Yet landscape changes occur, at different spatio-temporal scales, due to geological, climatic or ecological processes, and these changes result in repeated divisions and reconnections of populations.
David Claessen, Amaury Lambert
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2016
This chapter examines how populations in different environments can fall at different stages along a continuum of progress toward ecological speciation. It traces how variation can be used to infer ecological speciation through either of two general approaches: (1) integrated signatures of reproductive isolation based on measures of gene flow, and (2 ...
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This chapter examines how populations in different environments can fall at different stages along a continuum of progress toward ecological speciation. It traces how variation can be used to infer ecological speciation through either of two general approaches: (1) integrated signatures of reproductive isolation based on measures of gene flow, and (2 ...
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Genetics of ecological divergence during speciation [PDF]
Nature, 2014 Ecological differences often evolve early in speciation as divergent natural selection drives adaptation to distinct ecological niches, leading ultimately to reproductive isolation. Although this process is a major generator of biodiversity, its genetic basis is still poorly understood.
Nicole Bedford +2 more
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Ecological explanations for (incomplete) speciation
Trends in Ecology & Evolution, 2009Divergent natural selection has been shown to promote speciation in many taxa. However, although divergent selection often initiates the process of speciation, it often fails to complete it. Several time-based, geographic and genetic factors have been recognized to explain this variability in how far speciation proceeds.
Nosil, Patrik +2 more
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Evidence for ecology's role in speciation
Nature, 2004A principal challenge in testing the role of natural selection in speciation is to connect the build-up of reproductive isolation between populations to divergence of ecologically important traits. Demonstrations of 'parallel speciation', or assortative mating by selective environment, link ecology and isolation, but the phenotypic traits mediating ...
Jeffrey S, McKinnon +7 more
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The Ecological Genetics of Speciation
The American Naturalist, 2002Ecological interactions and the natural selection they cause play a prominent causal role in biological diversification and speciation. As a discipline, ecological genetics integrates the two components of adaptive evolution (natural selection and genetic variability) to study the mechanisms of evolution.
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Ecological speciation by sexual selection
Journal of Theoretical Biology, 1988Quantitative genetic models are used to investigate a mechanism of speciation involving natural and sexual selection on a population with more than one ecological niche available. Female choice of mates, based on ecologically important characters, can initiate a sudden shift into a new niche.
R, Lande, M, Kirkpatrick
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