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Punctuated equilibrium comes of age

S J Gould1, N Eldredge

  • 1Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts 02138.

Nature
|November 18, 1993
PubMed
Summary

Punctuated equilibrium, a key evolutionary theory, recognizes species stasis as a predominant pattern. It redefines macroevolution as the differential success of species lineages over geological time.

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Area of Science:

  • Evolutionary Biology
  • Paleontology
  • Species Evolution

Background:

  • Punctuated equilibrium has evolved from controversial origins to become a significant concept in evolutionary theory.
  • It complements the traditional view of phyletic gradualism in evolutionary science.

Purpose of the Study:

  • To highlight the mature contributions of punctuated equilibrium to evolutionary theory.
  • To emphasize the recognition of stasis as a major pattern in species history.
  • To present macroevolution as the differential success of species and their descendants.

Main Methods:

  • Analysis of historical controversies surrounding punctuated equilibrium.
  • Comparative study with phyletic gradualism.
  • Re-evaluation of macroevolutionary patterns.

Main Results:

  • Punctuated equilibrium is now a useful extension of evolutionary theory.
  • Stasis is recognized as a meaningful and predominant pattern in the history of species.
  • Macroevolution is reframed as the differential success of species within clades.

Conclusions:

  • Punctuated equilibrium provides crucial insights into evolutionary patterns.
  • The theory enhances our understanding of species' long-term persistence and diversification.
  • It offers a valuable perspective on macroevolutionary processes.

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