Environmental changes, co-extinction, and patterns in the fossil record

Details Environmental changes, co-extinction, and patterns in the fossil record Environmental changes, co-extinction, and patterns in the fossil record

1998-04-08

arxiv.org/abs/cond-mat/9804102v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 8 ps figures, using Latex2e with epsf rotate and multicol style files

Scientific paper

We introduce a new model for large scale evolution and extinction in which species are organized into food chains. The system evolves by two processes: origination/speciation and extinction. In the model, extinction of a given species can be due to an externally induced change in the environment or due to the extinction of all preys of that species (co-extinction). The model is able to reproduce the empirical observations, such as the statistical fractality of the fossil record or the scale-free distribution of extinction events, without invoking extinctions due to competition between species.

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