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Anole radiation on the mainland has largely been a process of speciation, and is not adaptive to any great degree, but anoles on each of the Greater Antilles (Cuba, Hispaniola, Puerto Rico, and Jamaica) have adaptively radiated in separate, convergent ways. [25]
An evolutionary radiation is an increase in taxonomic diversity that is caused by elevated rates of speciation, [1] that may or may not be associated with an increase in morphological disparity. [2] A significantly large and diverse radiation within a relatively short geologic time scale (e.g. a period or epoch) is often referred to as an ...
Speciation is the evolutionary ... more recent research has shown the birds now known as Darwin's finches to be a classic case of adaptive evolutionary radiation. ...
Nonadaptive radiations are driven by nonecological speciation. [2] [4] In many cases, this nonecological speciation is allopatric, and the organisms are dispersal-limited such that populations can be geographically isolated within a landscape with relatively similar ecological conditions. [4]
Divergent evolution or divergent selection is the accumulation of differences between closely related populations within a species, sometimes leading to speciation. Divergent evolution is typically exhibited when two populations become separated by a geographic barrier (such as in allopatric or peripatric speciation ) and experience different ...
Radiation is the evolutionary process of diversification of a single species into multiple forms. It includes the physiological and ecological diversity within a rapidly multiplying lineage. [ 8 ] There are many types of radiation including adaptive, concordant, and discordant radiation however escape and radiate coevolution does not always ...
Examples of speciation come from the observations of island biogeography and the process of adaptive radiation, both explained previously. Evidence of common descent can also be found through paleontological studies of speciation within geologic strata.
Adaptive radiation is when many species emerge in a short time. Yes, allopatric speciation may have been the manner in which all the species emerged in the adaptive radiation. Still, this does not make the radiation a form of speciation. Radiation is a form of a (large) group of speciations. --Ettrig 17:40, 17 October 2010 (UTC)