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Interaction between Allee effects caused by organism-environment feedback and by other ecological mechanisms

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  • Lijuan Qin
  • Feng Zhang
  • Wanxiong Wang
  • Weixin Song

Abstract

Understanding Allee effect has crucial importance for ecological conservation and management because it is strongly related to population extinction. Due to various ecological mechanisms accounting for Allee effect, it is necessary to study the influence of multiple Allee effects on the dynamics and persistence of population. We here focus on organism-environment feedback which can incur strong, weak, and fatal Allee effect (AE-by-OEF), and further examine their interaction with the Allee effects caused by other ecological mechanisms (AE-by-OM). The results show that multiple Allee effects largely increase the extinction risk of population either due to the enlargement of Allee threshold or the change of inherent characteristic of Allee effect, and such an increase will be enhanced dramatically with increasing the strength of individual Allee effects. Our simulations explicitly considering spatial structure also demonstrate that local interaction among habitat patches can greatly mitigate such superimposed Allee effects as well as individual Allee effect. This implies that spatially structurized habitat could play an important role in ecological conservation and management.

Suggested Citation

  • Lijuan Qin & Feng Zhang & Wanxiong Wang & Weixin Song, 2017. "Interaction between Allee effects caused by organism-environment feedback and by other ecological mechanisms," PLOS ONE, Public Library of Science, vol. 12(3), pages 1-15, March.
    • Handle: RePEc:plo:pone00:0174141
    DOI: 10.1371/journal.pone.0174141
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    1. McVinish, R. & Pollett, P.K., 2013. "Interaction between habitat quality and an Allee-like effect in metapopulations," Ecological Modelling, Elsevier, vol. 249(C), pages 84-89.
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