Evolutionary Model of Species Body Mass Diversification

被引：22
作者：
Clauset, A. [1 ]
Redner, S. [1 ,2 ,3 ]
机构：
[1] Santa Fe Inst, Santa Fe, NM 87501 USA
[2] Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA
[3] Boston Univ, Dept Phys, Boston, MA 02215 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 03期
关键词：
SIZE; DISTRIBUTIONS;
D O I：
10.1103/PhysRevLett.102.038103
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a quantitative model for the biological evolution of species body masses within large groups of related species, e.g., terrestrial mammals, in which body mass M evolves according to branching (speciation), multiplicative diffusion, and an extinction probability that increases logarithmically with mass. We describe this evolution in terms of a convection-diffusion-reaction equation for lnM. The steady-state behavior is in good agreement with empirical data on recent terrestrial mammals, and the time-dependent behavior also agrees with data on extinct mammal species between 95-50 Myr ago.
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页数：4
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