How scientists know about punctuated equilibria

 Punctuated Equilibrium is an evolutionary theory first suggested by Stephen Jay Gould and Niles Eldridge (  The theory states that evolution takes place in a short amount of time in a species history.  These changes take place in rapid bursts (  The theory takes place in 7 steps from stasis to rapid bursts to reintroduction.

In contrast, evolutionary biologists like Jay Gould have also discussed the theory of "phyletic gradualism" which attributes speciation to a "slow and steady transformation of entire populations" (Eldredge and Gould, 1972). Much debate surrounds the topic of punctuated equilibrium as a mode of speciation, rather than just being a result of gaps that exist in the fossil record.  

Examples[edit | edit source]

An example of punctuated equilibrium is the fossil mollusks of East Africa (Hicke, J.)

References[edit | edit source]

Hicke, J.

Eldredge, N. and Gould, S.J. (1972). Punctuated equilibria: an alternative to phyletic gradualism. In Schopf, Thomas J.M. (ed.). Models in Paleobiology. San Francisco: Freeman, Cooper and Company, pp. 82-115.

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