Predicting invasive species impacts: a community module functional response approach reveals context dependencies.
Predicting invasive species impacts: a community module functional response approach reveals context dependencies.
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DOI：
10.1111/1365-2656.12292
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发表时间：
2015-03
期刊：
影响因子：
--
通讯作者：
Dunn AM
中科院分区：
文献类型：
--
作者：
Paterson RA;Dick JT;Pritchard DW;Ennis M;Hatcher MJ;Dunn AM
捕食功能反应在捕食-被捕食动态中起着不可或缺的作用，它们的评估有助于更好地理解和预测入侵物种的捕食影响。 然而，其他种间的相互作用，如寄生和高阶捕食，有可能修改捕食者-猎物的相互作用，从而预测能力的比较功能反应的方法。 我们使用了一个四种群落模块（高阶捕食者;焦点本地或入侵捕食者;焦点捕食者的寄生虫;本地猎物）来比较本地Gammarus duebeni celticus和入侵Gammarus pulex端足类对三种无脊椎动物猎物（Asellus aquaticus，Simuelus spp.，Baetis rhodani），因此，定量的寄生和高阶鱼类捕食者对这些功能反应的上下文依赖性。 我们的功能反应实验表明，入侵端足类动物有较高的捕食性影响（较低的处理时间）的三个猎物物种，这反映了在现场观察到的影响模式。社区模块还显示，寄生有上下文相关的影响，一个猎物物种，有可能进一步减少入侵端足类的捕食性影响或增加本地端足类的捕食性影响，在存在的高阶鱼类捕食者。 两种捕食者对猎物的部分消耗是相似的，并且在水生A.和B. rhodani。这是与猎物密度增加，但没有上下文的依赖关系与寄生或高阶鱼类捕食者。 这项研究支持的适用性比较功能反应作为一种工具来预测和评估入侵物种的影响，将多个上下文的依赖关系。
Predatory functional responses play integral roles in predator–prey dynamics, and their assessment promises greater understanding and prediction of the predatory impacts of invasive species. Other interspecific interactions, however, such as parasitism and higher-order predation, have the potential to modify predator–prey interactions and thus the predictive capability of the comparative functional response approach. We used a four-species community module (higher-order predator; focal native or invasive predators; parasites of focal predators; native prey) to compare the predatory functional responses of native Gammarus duebeni celticus and invasive Gammarus pulex amphipods towards three invertebrate prey species (Asellus aquaticus, Simulium spp., Baetis rhodani), thus, quantifying the context dependencies of parasitism and a higher-order fish predator on these functional responses. Our functional response experiments demonstrated that the invasive amphipod had a higher predatory impact (lower handling time) on two of three prey species, which reflects patterns of impact observed in the field. The community module also revealed that parasitism had context-dependent influences, for one prey species, with the potential to further reduce the predatory impact of the invasive amphipod or increase the predatory impact of the native amphipod in the presence of a higher-order fish predator. Partial consumption of prey was similar for both predators and occurred increasingly in the order A. aquaticus, Simulium spp. and B. rhodani. This was associated with increasing prey densities, but showed no context dependencies with parasitism or higher-order fish predator. This study supports the applicability of comparative functional responses as a tool to predict and assess invasive species impacts incorporating multiple context dependencies.
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影响因子：
3.3
作者：
Dick, Jaimie T. A.;Armstrong, Michael;Dunn, Alison M.
通讯作者：
Dunn, Alison M.
影响因子：
4.2
作者：
Fantinou, A. A.;Perdikis, D. Ch.;Maselou, D. A.
通讯作者：
Maselou, D. A.
DOI：
10.1016/j.jembe.2012.10.006
发表时间：
2013-01-01
影响因子：
2
作者：
Alexander, Mhairi E.;Dick, Jaimie T. A.;O'Connor, Nessa E.
通讯作者：
O'Connor, Nessa E.
影响因子：
2.2
作者：
Dubs, DOL;Corkum, LD
通讯作者：
Corkum, LD
影响因子：
4
作者：
Franceschi, Nathalie;Bauer, Alexandre;Rigaud, Thierry
通讯作者：
Rigaud, Thierry