Nonlinear Sciences – Adaptation and Self-Organizing Systems
Scientific paper
1998-09-22
Paleobiology 25, 434-439 (1999)
Nonlinear Sciences
Adaptation and Self-Organizing Systems
11 pages including 3 postscript figures, typeset in LaTeX 2e using the Elsevier macro package elsart.cls
Scientific paper
We show that the decline in the extinction rate during the Phanerozoic can be accurately parameterized by a logarithmic fit to the cumulative total extinction. This implies that extinction intensity is falling off approximately as the reciprocal of time. We demonstrate that this observation alone is sufficient to explain the existence of the proposed power-law forms in the distribution of the sizes of extinction events and in the power spectrum of Phanerozoic extinction, results which previously have been explained by appealing to self-organized critical theories of evolutionary dynamics.
Eble Gunther J.
Newman M. E. J.
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