Risk of Population Extinction from Periodic and Abrupt Changes of Environment

Details Risk of Population Extinction from Periodic and Abrupt Changes of Environment Risk of Population Extinction from Periodic and Abrupt Changes of Environment

2008-01-07

arxiv.org/abs/0801.0981v1

Nonlinear Sciences

Adaptation and Self-Organizing Systems

8 pages, 25 references, 10 figures; preliminary version to be submitted to Physica A

Scientific paper

10.1016/j.physa.2008.01.001

A simulation model of a population having internal (genetic) structure is presented. The population is subject to selection pressure coming from the environment which is the same in the whole system but changes in time. Reproduction has a sexual character with recombination and mutation. Two cases are considered - oscillatory changes of the environment and abrupt ones (catastrophes). We show how the survival chance of a population depends on maximum allowed size of the population, the length of the genotypes characterising individuals, selection pressure and the characteristics of the climate changes, either their period of oscillations or the scale of the abrupt shift.

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