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Asymmetric migration decreases stability but increases resilience in a heterogeneous metacommunity

Anurag Limdi, Alfonso Pérez-Escudero, Aming Li, Jeff Gore
doi: https://doi.org/10.1101/201723
Anurag Limdi
1Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
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Alfonso Pérez-Escudero
1Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
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Aming Li
1Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
2Center for Systems and Control, College of Engineering, Peking University, Beijing 100871, China
3Center for Complex Network Research and Department of Physics, Northeastern University, Boston, MA 02115, USA
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Jeff Gore
1Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
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  • For correspondence: gore@mit.edu
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Abstract

Many natural communities are spatially distributed, forming a network of subcommunities linked by migration. Migration patterns are often asymmetric and heterogeneous, with important consequences on the ecology and evolution of the species. Here we investigated experimentally how asymmetric migration and heterogeneous structure affect a simple metacommunity of budding yeast, formed by one strain that produces a public good and a non-producer strain that benefits from it. We find that asymmetric migration increases the fraction of producers in all subpopulations of the metacommunity. Furthermore, asymmetric migration decreases the metacommunity’s tolerance to challenging environments, but increases its resilience to transient perturbations. This apparent paradox occurs because tolerance to a constant challenge depends on the weakest subpopulations of the network, while resilience to a transient perturbation depends on the strongest ones.

One Sentence Summary Asymmetric migration decreases the stability of experimental yeast metacommunities but increases their resilience to transient shocks.

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Posted October 11, 2017.
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Asymmetric migration decreases stability but increases resilience in a heterogeneous metacommunity
Anurag Limdi, Alfonso Pérez-Escudero, Aming Li, Jeff Gore
bioRxiv 201723; doi: https://doi.org/10.1101/201723
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Asymmetric migration decreases stability but increases resilience in a heterogeneous metacommunity
Anurag Limdi, Alfonso Pérez-Escudero, Aming Li, Jeff Gore
bioRxiv 201723; doi: https://doi.org/10.1101/201723

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