Time-dependent extinction rate and species abundance in a tangled-nature model of biological evolution
Time-dependent extinction rate and species abundance in a tangled-nature model of biological evolution
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DOI：
10.1103/physreve.66.011904
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发表时间：
2002-07-01
影响因子：
2.4
通讯作者：
Jensen, HJ
中科院分区：
文献类型：
--
作者：
Hall, M;Christensen, K;Jensen, HJ
我们提出了一个进化生态学模型，由相互作用的个体组成的网络，缠结自然模型。以基因组为特征的个体的繁殖率取决于基因型空间中群体的组成。生态学特征，如分类学和宏观演化模式的动态是涌现的属性。宏观动力学表现出间歇性的双模式开关与逐渐降低的消光率。所产生的生态系统在集体意义上逐渐变得更好地适应和更复杂。物种丰度曲线的形式与观察到的功能形式比较好。模型的误差阈值可以根据系统的两个动态模式的特性来理解。
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.