Effects of network modularity on the spread of perturbation impact in experimental metapopulations

被引:170
作者
Gilarranz, Luis J. [1 ,2 ]
Rayfield, Bronwyn [3 ]
Linan-Cembrano, Gustavo [4 ]
Bascompte, Jordi [1 ,2 ]
Gonzalez, Andrew [3 ]
机构
[1] CSIC, Estn Biol Donana, Integrat Ecol Grp, C Americo Vespucio S-N, Seville 41092, Spain
[2] Univ Zurich, Dept Evolutionary Biol & Environm Studies, Winterthurerstr 190, CH-8057 Zurich, Switzerland
[3] McGill Univ, Dept Biol, 1205 Docteur Penfield, Montreal, PQ H3A 1B1, Canada
[4] Univ Seville, CSIC, Inst Microelect Sevilla, C Americo Vespucio S-N, Seville 41092, Spain
基金
欧洲研究理事会; 加拿大自然科学与工程研究理事会;
关键词
STABILITY; COMPARTMENTALIZATION; ECOLOGY; SYSTEMS; RISKS;
D O I
10.1126/science.aal4122
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Networks with a modular structure are expected to have a lower risk of global failure. However, this theoretical result has remained untested until now. We used an experimental microarthropod metapopulation to test the effect of modularity on the response to perturbation. We perturbed one local population and measured the spread of the impact of this perturbation, both within and between modules. Our results show the buffering capacity of modular networks. To assess the generality of our findings, we then analyzed a dynamical model of our system. We show that in the absence of perturbations, modularity is negatively correlated with metapopulation size. However, even when a small local perturbation occurs, this negative effect is offset by a buffering effect that protects the majority of the nodes from the perturbation.
引用
收藏
页码:199 / 201
页数:3
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