Warming strengthens an herbivore-plant interaction
Warming strengthens an herbivore-plant interaction
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DOI：
10.1890/08-0034.1
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发表时间：
2009-02-01
期刊：
影响因子：
4.8
通讯作者：
O'Connor, Mary I.
中科院分区：
文献类型：
--
作者：
O'Connor, Mary I.
温度对新陈代谢有强烈且可预测的影响。通过这种机制，环境温度通过决定资源利用、生长、繁殖和死亡率的速率来影响变温动物的个体和种群。生长和繁殖等代谢过程的可预测变化可能会影响物种相互作用的强度，但代谢温度依赖性对群落水平的影响实际上尚未被探索。我使用常见的海洋大型藻类（马尾藻）和食草片脚类 Ampithoe longimana 实验测试了植物食草动物相互作用强度随温度增加的假设。在两个独立实验中，温度升高增加了人均相互作用强度，并逆转了温度对植物生长的积极影响。温度不会改变植物组织对食草动物的适口性或平均食草动物的摄食率。温度对食草动物与植物相互作用强度的可预测影响可以为了解当地食物网对不同时空尺度温度变化的反应提供关键信息。将生理机制的影响扩展到更大规模的模式的努力，包括气候变化生态影响的预测，必须扩大到包括条件变化对营养相互作用的影响。
Temperature has strong, predictable effects on metabolism. Through this mechanism, environmental temperature affects individuals and populations of poikilotherms by determining rates of resource use, growth, reproduction, and mortality. Predictable variation in metabolic processes such as growth and reproduction could affect the strength of species interactions, but the community-level consequences of metabolic temperature dependence are virtually unexplored. I experimentally tested the hypothesis that plant herbivore interaction strength increases with temperature using a common species of marine macroalga (Sargassum filipendula) and the grazing amphipod Ampithoe longimana. Increasing temperature increased per capita interaction strength in two independent experiments and reversed a positive effect of temperature on plant growth. Temperature did not alter palatability of plant tissue to herbivores or average herbivore feeding rate. A predictable effect of temperature on herbivore-plant interaction strength could provide key information toward understanding local food web responses to changing temperatures at different spatial and temporal scales. Efforts to extend the effects of physiological mechanisms to larger scale patterns, including projections of the ecological effects of climate change, must be expanded to include the effects of changing conditions on trophic interactions.