Mechanisms for stable coexistence in an insect community

  • Received: 01 May 2009 Accepted: 29 June 2018 Published: 01 June 2010
  • MSC : Primary: 92D40, 92D25; Secondary: 34D20.

  • In this paper, we formulate a three-species ecological community model consisting of two aphid species ( Acyrthosiphon pisum and Megoura viciae) and a specialist parasitoid ( Aphidius ervi) that attacks only one of the aphids ( A pisum). The model incorporates both density-mediated and trait-mediated host-parasitoid interactions. Our analysis shows that the model possesses much richer and more realistic dynamics than earlier models. Our theoretical results reveal a new mechanism for stable coexistence in a three-species community in which any two species alone do not co-exist. More specifically, it is known that, when a predator is introduced into a community of two competing species, if the predator only predates on the strong competitor, it can allow the weak competitor to survive, but may drive the strong competitor to extinction through over-exploitation. We show that if the weak competitor interferes the predation on the strong competitor through trait-mediated indirect effects, then all three species can stably co-exist.

    Citation: Meng Fan, Bingbing Zhang, Michael Yi Li. Mechanisms for stable coexistence in an insect community[J]. Mathematical Biosciences and Engineering, 2010, 7(3): 603-622. doi: 10.3934/mbe.2010.7.603

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  • In this paper, we formulate a three-species ecological community model consisting of two aphid species ( Acyrthosiphon pisum and Megoura viciae) and a specialist parasitoid ( Aphidius ervi) that attacks only one of the aphids ( A pisum). The model incorporates both density-mediated and trait-mediated host-parasitoid interactions. Our analysis shows that the model possesses much richer and more realistic dynamics than earlier models. Our theoretical results reveal a new mechanism for stable coexistence in a three-species community in which any two species alone do not co-exist. More specifically, it is known that, when a predator is introduced into a community of two competing species, if the predator only predates on the strong competitor, it can allow the weak competitor to survive, but may drive the strong competitor to extinction through over-exploitation. We show that if the weak competitor interferes the predation on the strong competitor through trait-mediated indirect effects, then all three species can stably co-exist.


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  • © 2010 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0)
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