Increased temperature alters feeding behavior of a generalist herbivore
Increased temperature alters feeding behavior of a generalist herbivore
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DOI：
10.1111/j.1600-0706.2013.00457.x
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发表时间：
2013-12-01
期刊：
影响因子：
3.4
通讯作者：
Parker, John D.
中科院分区：
文献类型：
--
作者：
Lemoine, Nathan P.;Drews, Willem A.;Parker, John D.
温度可以调节许多重要的生物过程和物种相互作用。例如，环境温度可以改变昆虫食草动物的消费，生长和生存，这表明温度驱动的影响食草动物可能会影响植物群落组成或养分循环。然而，迄今为止，很少有研究探讨温度升高是否会影响多种植物物种的食草动物偏好和表现，这通常决定了它们在群落层面的影响。在这里，我们评估了温度对9种植物中的通性草食动物Popillia japonica的表现和偏好的影响。我们表明，平均而言，消费率和草食动物的性能在较高的温度下增加。然而，有相当大的变化与消费和性能的一些植物物种在较高的温度下增加，但在其他下降的植物物种。植物营养质量似乎影响这些模式，甲虫增加喂养高氮植物随着温度的升高，这表明更强的氮限制。除了摄食率的变化外，日本对虾的摄食偏好在温度之间发生了变化，这种模式在很大程度上可以解释为不同温度下植物化学提取物的差异威慑。事实上，温度引起的植物化学提取物功效的变化导致日本对虾在较高温度下减少其食物宽度。我们的研究结果表明，温度升高将通过改变植物营养和化学性状的重要性来影响食草动物的摄食行为，这表明气候变化将改变植物-昆虫相互作用的强度和迹象。
Temperature can regulate a number of important biological processes and species interactions. For example, environmental temperature can alter insect herbivore consumption, growth and survivorship, suggesting that temperature-driven impacts on herbivory could influence plant community composition or nutrient cycling. However, few studies to date have examined whether rising temperature influences herbivore preference and performance among multiple plant species, which often dictates their impact at the community level. Here, we assessed the effects of temperature on the performance and preference of the generalist herbivore Popillia japonica among nine plant species. We show that, on average, consumption rates and herbivore performance increased at higher temperatures. However, there was considerable variation among plant species with consumption and performance increasing on some plant species at higher temperatures but decreasing on others. Plant nutritional quality appeared to influence these patterns as beetles increased feeding on high-nitrogen plants with increasing temperature, suggesting stronger nitrogen limitation. In addition to changes in feeding rates, feeding preferences of P. japonica shifted among temperatures, a pattern that was largely explained by differential deterrence of plant chemical extracts at different temperatures. In fact, temperature-induced changes in the efficacy of plant chemical extracts led P. japonica to reduce its diet breadth at higher temperatures. Our results indicate that rising temperatures will influence herbivore feeding behavior by altering the importance of plant nutritional and chemical traits, suggesting that climate change will alter the strength and sign of plant-insect interactions.