Evolutionary radiation: Difference between revisions

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Geographic radiations involve an increase in speciation caused by increasing opportunities for geographic isolation.<ref name="Simões et al 2016"/> Adaptive radiations involve an increase in a clade's speciation rate coupled with divergence of morphological features that are directly related to ecological habits; these radiations involve speciation not driven by geographic factors and occurring in sympatry; they also may be associated with the acquisition of a key trait<ref name="Lieberman2012">{{Cite journal| first1 = B.S. | title = Adaptive radiations in the context of macroevolutionary theory: a paleontological perspective | journal = Evolutionary Biology | volume = 39 | issue = | pages = 181–191| year = 2012| last1 = Lieberman| url = https://kuscholarworks.ku.edu/bitstream/1808/13649/3/Lieberman_Adaptive_Radiations.pdf | doi=10.1007/s11692-012-9165-8}}</ref>. Radiations may be discordant, with either diversity or disparity increasing almost independently of the other, or concordant, where both increase at a similar rate.<ref name=Wesley-Hunt2005/>
==In the fossil record==