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Related Experiment Videos

Macroevolution is more than repeated rounds of microevolution.

D H Erwin1

  • 1Department of Paleobiology, National Museum of Natural History, Washington, DC 20560, USA. erwin.doug@nmnh.si.edu

Evolution & Development
|March 22, 2001
PubMed
Summary
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Macroevolutionary studies reveal patterns in the history of life, highlighting discontinuities and evolutionary novelties. These large-scale patterns offer a richer understanding of evolution than microevolution alone.

Area of Science:

  • Evolutionary biology
  • Paleontology
  • Developmental biology

Background:

  • Historical debates on macroevolution versus microevolution.
  • Early emphasis on non-Darwinian processes and macroevolution for morphologic novelty.
  • Later acceptance of natural selection with speciation-driven discontinuity between micro- and macroevolution.

Purpose of the Study:

  • To explore discontinuities in evolutionary patterns.
  • To re-evaluate macroevolution's role in evolutionary innovation.
  • To argue for macroevolution's necessity in understanding life's history.

Main Methods:

  • Analysis of fossil record patterns.
  • Integration of paleontological data with evolutionary theory.
  • Consideration of comparative developmental biology findings.

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Main Results:

  • Identification of discontinuities in evolutionary trends, species sorting, and clade success.
  • Evidence for hierarchical structure in evolution, challenging smooth extrapolation from microevolution.
  • Emerging links between macroevolutionary discontinuities and evolutionary innovation.

Conclusions:

  • Macroevolution reveals a richness in evolutionary patterns not explained by microevolution.
  • Hierarchical structures in evolution suggest limitations in extrapolating from microevolutionary mechanisms.
  • Understanding life's history requires the comprehensive view offered by macroevolutionary studies.