Fluctuations in models of biological macroevolution

Details Fluctuations in models of biological macroevolution Fluctuations in models of biological macroevolution

2005-02-28

arxiv.org/abs/q-bio/0502046v1

Proceedings of SPIE -- Volume 5845, Noise in Complex Systems and Stochastic Dynamics III, edited by L.B. Kish, K. Lindenberg,

Biology

Quantitative Biology

Populations and Evolution

7 pages, 5 figures

Scientific paper

10.1117/12.609762

Fluctuations in diversity and extinction sizes are discussed and compared for two different, individual-based models of biological coevolution. Both models display power-law distributions for various quantities of evolutionary interest, such as the lifetimes of individual species, the quiet periods between evolutionary upheavals larger than a given cutoff, and the sizes of extinction events. Time series of the diversity and measures of the size of extinctions give rise to flicker noise. Surprisingly, the power-law behaviors of the probability densities of quiet periods in the two models differ, while the distributions of the lifetimes of individual species are the same.

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