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Related Experiment Videos

Modeling bivalve diversification: the effect of interaction on a macroevolutionary system.

A I Miller1, J J Sepkoski

  • 1Department of Geology, University of Cincinnati, Ohio 45221, USA.

Paleobiology
|January 1, 1988
PubMed
Summary

Bivalve diversification shows slow growth, largely unaffected by mass extinctions. However, interactions with other species created bursts in bivalve diversity throughout their history.

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Area of Science:

  • Paleontology
  • Evolutionary Biology
  • Marine Biology

Background:

  • Global diversification of Bivalvia class has two conflicting interpretations.
  • One suggests a major diversification upturn linked to the Late Permian mass extinction.
  • The other posits minimal influence of mass extinctions, with steady exponential diversification.

Purpose of the Study:

  • To investigate the historical diversification patterns of Bivalvia.
  • To reconcile conflicting interpretations of bivalve diversification history.
  • To determine the influence of mass extinctions and inter-clade interactions on bivalve diversity.

Main Methods:

  • Analysis of bivalve diversification through the Phanerozoic.
  • Application of a two-phase coupled logistic model.
Keywords:
NASA Discipline ExobiologyNon-NASA Center

Related Experiment Videos

  • Modeling interactions between bivalves and a hypothetical clade.

    • Main Results:

    • Bivalve diversity exhibited slow growth through most of the Phanerozoic, largely unaffected by mass extinctions.
    • Hyperexponential bursts in diversification occurred during the Ordovician radiation and after the Late Permian and Late Cretaceous mass extinctions.
    • A two-phase coupled logistic model effectively explains the observed diversification patterns.

    Conclusions:

    • Bivalve diversification is more complex than previously thought.
    • Interactions with other taxa have significantly impacted global bivalve diversity.
    • A dampened characteristic diversification rate, punctuated by bursts, characterizes bivalve evolutionary history.