Relative species abundance of replicator dynamics with sparse interactions
Relative species abundance of replicator dynamics with sparse interactions
复制标题
具有稀疏相互作用的复制动力学的相对物种丰度
DOI:
10.1088/1742-5468/2016/11/113502
复制
发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Kei Tokita
中科院分区:
文献类型:
--
作者:
Tomoyuki Obuchi;Yoshiyuki Kabashima;Kei Tokita
A theory of relative species abundance on sparsely-connected networks is presented by investigating the replicator dynamics with symmetric interactions. Sparseness of a network involves difficulty in analyzing the fixed points of the equation, and we avoid this problem by treating large self interaction u, which allows us to construct a perturbative expansion. Based on this perturbation, we find that the nature of the interactions is directly connected to the abundance distribution, and some characteristic behaviors, such as multiple peaks in the abundance distribution and all species coexistence at moderate values of u, are discovered in a wide class of the distribution of the interactions. The all species coexistence collapses at a critical value of u, u c, and this collapsing is regarded as a phase transition. To get more quantitative information, we also construct a non-perturbative theory on random graphs based on techniques of statistical mechanics. The result shows those characteristic behaviors are sustained well even for not large u. For even smaller values of u, extinct species start to appear and the abundance distribution becomes rounded and closer to a standard functional form. Another interesting finding is the non-monotonic behavior of diversity, which quantifies the number of coexisting species, when changing the ratio of mutualistic relations
登录
查看更多内容
影响因子:
56.9
作者:
Nowak, MA;Komarova, NL;Niyogi, P
通讯作者:
Niyogi, P
影响因子:
64.8
作者:
Ohtsuki, Hisashi;Hauert, Christoph;Nowak, Martin A.
通讯作者:
Nowak, Martin A.
影响因子:
1.6
作者:
T. Galla
通讯作者:
T. Galla
DOI:
10.1103/physreve.64.051911
发表时间:
2001
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
V. M. de Oliveira;J. Fontanari
通讯作者:
J. Fontanari
DOI:
10.1140/epjb/e2003-00030-x
发表时间:
2003
期刊:
影响因子:
--
作者:
V. M. Oliveira
通讯作者:
V. M. Oliveira