Time-dependent extinction rate and species abundance in a tangled-nature model of biological evolution

被引：71
|
作者：
Hall, M
Christensen, K
di Collobiano, SA
Jensen, HJ
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2BZ, England
[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England
来源：
PHYSICAL REVIEW E | 2002年 / 66卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.66.011904
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We present a model of evolutionary ecology consisting of a web of interacting individuals, a tangle-nature model. The reproduction rate of individuals characterized by their genome depends on the composition of the population in genotype space. Ecological features such as the taxonomy and the macroevolutionary mode of the dynamics are emergent properties. The macrodynamics exhibit intermittent two-mode switching with a gradually decreasing extinction rate. The generated ecologies become gradually better adapted as well as more complex in a collective sense. The form of the species abundance curve compares well with observed functional forms. The model's error threshold can be understood in terms of the characteristics of the two dynamical modes of the system.
引用
收藏
页码：1 / 011904
页数：10
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