Ecological impacts of invasive alien species along temperature gradients: testing the role of environmental matching
Ecological impacts of invasive alien species along temperature gradients: testing the role of environmental matching
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DOI：
10.1890/14-0545.1
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发表时间：
2015-04-01
影响因子：
5
通讯作者：
Ricciardi, Anthony
中科院分区：
文献类型：
--
作者：
Iacarella, Josephine C.;Dick, Jaimie T. A.;Ricciardi, Anthony
外来入侵物种（IAS）可以造成实质性的生态影响，在不断变化的气候中，温度在介导这些影响中的作用可能变得越来越重要。生境条件和生理最佳提供预测信息IAS的影响，在新的环境。在这里，使用荟萃分析和实验室实验，我们测试的假设，即IAS在现场的影响与其环境和最佳温度的差异呈负相关。对29项关于内陆沃茨中国际审计标准的消耗影响的研究进行的元分析表明，在与鱼类和甲壳类动物的最佳热生长温度更接近的温度下，它们受到的影响更大。特别是，最大影响潜力受到环境温度和最佳温度之间差异增加的制约，如影响数据上第25百分位数分位数回归的斜率比所有数据加权线性回归的斜率更陡，并测量了方差。我们补充了这项研究的实验分析的功能性反应（捕食率和猎物供应之间的关系）的两个入侵的捕食者（淡水糠虾，Hemimysis anomala和糠虾）在相关的温度梯度;这两个物种以前被发现发挥强大的社区水平的影响，证实了他们的功能性反应不同的猎物项目。功能反应实验表明，在最大摄食速率下，H. anomala和M.洪积物在其各自的热最适值附近具有明显的峰。虽然变化的影响可能是由许多非生物或生物栖息地的特点，我们的分析点温度作为一个关键的调解人的IAS的影响水平在内陆沃茨，并建议IAS管理应优先考虑栖息地的入侵范围内，更紧密地匹配的目标入侵者的最佳热。
Invasive alien species (IAS) can cause substantive ecological impacts, and the role of temperature in mediating these impacts may become increasingly significant in a changing climate. Habitat conditions and physiological optima offer predictive information for IAS impacts in novel environments. Here, using meta-analysis and laboratory experiments, we tested the hypothesis that the impacts of IAS in the field are inversely correlated with the difference in their ambient and optimal temperatures. A meta-analysis of 29 studies of consumptive impacts of IAS in inland waters revealed that the impacts of fishes and crustaceans are higher at temperatures that more closely match their thermal growth optima. In particular, the maximum impact potential was constrained by increased differences between ambient and optimal temperatures, as indicated by the steeper slope of a quantile regression on the upper 25th percentile of impact data compared to that of a weighted linear regression on all data with measured variances. We complemented this study with an experimental analysis of the functional response (the relationship between predation rate and prey supply) of two invasive predators (freshwater mysid shrimp, Hemimysis anomala and Mysis diluviana) across relevant temperature gradients; both of these species have previously been found to exert strong community-level impacts that are corroborated by their functional responses to different prey items. The functional response experiments showed that maximum feeding rates of H. anomala and M. diluviana have distinct peaks near their respective thermal optima. Although variation in impacts may be caused by numerous abiotic or biotic habitat characteristics, both our analyses point to temperature as a key mediator of IAS impact levels in inland waters and suggest that IAS management should prioritize habitats in the invaded range that more closely match the thermal optima of targeted invaders.