The Impact of Coinfection Dynamics on Host Competition and Coexistence
The Impact of Coinfection Dynamics on Host Competition and Coexistence
复制标题
共感染动力学对宿主竞争和共存的影响
DOI:
10.1086/717180
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Tate, Ann T.
中科院分区:
文献类型:
--
作者:
Rovenolt, Faith H.;Tate, Ann T.
Parasites can mediate competition among host species in an ecological community by differentially affecting key parameters that normally give one species a competitive edge. In nature, however, coinfecting parasites that antagonize or facilitate each other—for example, by altering cross-protective host immune responses—can modulate host infection outcomes and parasite transmission relative to a single infection. Under what conditions is coinfection likely to interfere with parasite-mediated apparent competition among hosts? To address this question, we created a model of two coinfected host species. Parasites could interact indirectly by affecting host reproduction or directly by modulating recovery and disease-induced mortality of each host species to a focal infection. We grounded our model with parameters from a classic apparent competition system but allowed for multiple parasite transmission modes and interaction scenarios. Our results suggest that infection-induced mortality has an outsized effect on competition outcomes relative to recovery but that coinfection-mediated modulation of mortality can produce a range of coexistence or competitive exclusion outcomes. Moreover, while infection prevalence is sensitive to variation in parasite transmission mode, host competitive outcomes are not. Our generalizable model highlights the influence of immunological variation and parasite ecology on community ecology.
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