Punctuated Equilibri3

Punctuated Equilibri3 - Punctuated Equilibria Patterns of...

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Punctuated Equilibria Patterns of speciation from neontological study Eldredge and Gould's insight into paleontological processes was to derive their understanding of paleospecies from living biological species. In this manner, it can be made clear what PE means for the concept of paleospecies. First, modern species appear to have derived from cladogenesis, the splitting of a daughter species from an ancestral species rather than transformation of the ancestral species in toto. This is a multiplication of species, and without it, the diversity of the living systems that we see would be impossible. Second, the mode of speciation most often seen is also identified from modern populations. That mode is allopatric speciation of peripheral isolates, or peripatric speciation in Mayr's terminology. Peripatric speciation states that a population of an ancestral species in a geographically peripheral part of the ancestral range is modified over time until even when the ancestral and daughter populations come into contact, there is reproductive isolation. While
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This note was uploaded on 11/14/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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