Comparing the Indirect Effects between Exploiters in Predator-Prey and Host-Pathogen Systems
Comparing the Indirect Effects between Exploiters in Predator-Prey and Host-Pathogen Systems
复制标题
比较捕食者-被捕食者和宿主-病原体系统中剥削者之间的间接影响
DOI：
10.1086/711345
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Duffy, Meghan A.
中科院分区：
文献类型：
--
作者：
Cortez, Michael H.;Duffy, Meghan A.
在多捕食者和多病原体系统中，剥削者通过共享的受害者物种间接相互作用。已知种间猎物竞争和捕食者专业化程度会影响捕食者是否具有竞争性（即（−,−））或非竞争性（即（−,+）或（+,+））间接相互作用。对感染同一宿主物种种群的病原体之间的种群水平间接相互作用知之甚少。在这项研究中，我们使用两个捕食者-两个猎物和两个宿主-两个病原体模型来比较捕食者之间的间接影响和病原体之间的间接影响。我们关注病原体之间的间接相互作用如何受到易感宿主和受感染宿主竞争能力的影响，病原体是专门性还是通才性，以及传播途径（直接传播与环境传播）。在许多情况下，病原体和捕食者之间的间接影响遵循类似的模式，例如，随着受害者物种之间种间竞争的增加，间接影响更加积极。然而，病原菌之间的间接效应可能会有质的差异，例如，随着种间宿主竞争的增加，间接效应会更加消极。这些对比模式表明，掠食性和寄生性相互作用之间的重要机制差异（特别是，相互作用是否立即致命）可以对剥削者之间的间接相互作用产生重要的种群水平影响。
In multipredator and multipathogen systems, exploiters interact indirectly via shared victim species. Interspecific prey competition and the degree of predator specialization are known to influence whether predators have competitive (i.e., (−,−)) or noncompetitive (i.e., (−,+) or (+,+)) indirect interactions. Much less is known about the population-level indirect interactions between pathogens that infect the same populations of host species. In this study, we use two-predator-two-prey and two-host-two-pathogen models to compare the indirect effects between predators with the indirect effects between pathogens. We focus on how the indirect interactions between pathogens are affected by the competitive abilities of susceptible and infected hosts, whether the pathogens are specialists or generalists, and the transmission pathway (direct vs. environmental transmission). In many cases, indirect effects between pathogens and predators follow similar patterns, for example, more positive indirect effects with increased interspecific competition between victim species. However, the indirect effects between pathogens can qualitatively differ, for example, more negative indirect effects with increased interspecific host competition. These contrasting patterns show that an important mechanistic difference between predatory and parasitic interactions (specifically, whether interactions are immediately lethal) can have important population-level effects on the indirect interactions between exploiters.
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DOI：
10.1098/rspb.2017.2610
发表时间：
2018-03-14
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Lello J;McClure SJ;Tyrrell K;Viney ME
通讯作者：
Viney ME
影响因子：
2.5
作者：
LAFFERTY, KD
通讯作者：
LAFFERTY, KD
影响因子：
56.9
作者：
Lafferty, Kevin D.;DeLeo, Giulio;Kuris, Armand M.
通讯作者：
Kuris, Armand M.
影响因子：
1.4
作者：
Greenman, JV;Hudson, PJ
通讯作者：
Hudson, PJ
影响因子：
4.8
作者：
Cortez, Michael H.;Abrams, Peter A.
通讯作者：
Abrams, Peter A.