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27 Απρ 2012 · The focus here is on outlining some of these major developments, specifically in the context of paleontology, by emphasizing the significance of geographic isolation and allopatric speciation, punctuated equilibria, and the Turnover Pulse Hypothesis to evolutionary theory.
- The (Paleo)Geography of Evolution: Making Sense of Changing Biology and ...
Geographic isolation (vicariance) or geographic merging...
- The (Paleo)Geography of Evolution: Making Sense of Changing Biology and ...
A key issue in the study of speciation and its contribution to community assembly involves the role of geographical barriers. In allopatric speciation, a geographical barrier prevents gene flow between populations and reproductive isolation evolves as a byproduct of divergent natural selection.
Ecological speciation: A speciation process in which divergent natural selection drives the evolution of reproductive incompatibility (i.e., isolation) between taxa.
The chapter reviews some of the major biogeographic patterns, and summarize theories that have been developed to account for the different patterns, including vicariance, dispersal, island biogeography, ecophylogenetics, niche theory, and neutral theory.
20 Ιαν 2010 · Under what conditions does geographic isolation constitute a reproductive isolating barrier? and How do we estimate the “importance” of different isolating barriers? Here, we address these questions, providing historical background and offering some new perspectives.
18 Απρ 2012 · Geographic isolation (vicariance) or geographic merging (geodispersal) can occur for a variety of reasons (sea level rise, splitting of continents, mountain building). In addition, the growth of a large supercontinent (or breakup) may change the climatic zonation on the globe and form a different type of barrier for species migration.
1 Δεκ 2012 · The focus here is on outlining some of these major developments, specifically in the context of paleontology, by emphasizing the significance of geographic isolation and allopatric speciation...
