Enhanced stability in host-parasitoid interactions with autoparasitism and parasitoid migration

Journal of Theoretical Biology
Yunxin HuangFanghao Wan

Abstract

Previous studies based on simple non-spatial model have suggested that autoparasitism, in which females develop as primary endoparasitoids of hosts while males develop at the expense of primary parasitoids, stabilizes host-parasitoid steady state. To date, however, how the stabilizing role of autoparasitism would be affected by more complex spatial factors has not been adequately investigated. To address the issue, here we analyzed a spatially extended two-patch host-parasitoid model and compared it with the corresponding non-spatial model. Results showed that in the non-spatial model and the case of autoparasitoid, the host-parasitoid steady states can be unstable if the host׳s intrinsic rate of growth and/or carrying capacity is sufficiently large. However, in the spatially extended two-patch model with parasitoid migration, the unstable host-parasitoid steady states in each local patch may become stable, provided there is certain spatial unevenness in host growth and/or carrying capacity. Therefore, the migration of parasitoid together with spatial unevenness in host growth and/or carrying capacity stabilizes the host-parasitoid interactions. The stabilizing effects are stronger with the host density-dependent migration of p...Continue Reading

References

Sep 5, 2001·Journal of Theoretical Biology·S J SchreiberA P Gutierrez
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Oct 25, 2012·Annual Review of Entomology·Jeffrey A HarveyToshiharu Tanaka

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Citations

Jul 3, 2020·Mathematical Biosciences·Brooks EmerickSafal Raut Chhetri

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