Plant invasions threaten global ecosystems and biodiversity. Climate warming greatly challenge the management of plant invasions by affecting plant-herbivore interactions. Plant volatiles are used as signals by herbivores to mediate interactions between plants and herbivores. However, it is unclear whether climate warming will affect the volatile emissions of invasive plants, and subsequently alter the preferences of native herbivores. In this study, simulated warming experiments were conducted to investigate the preferences of a generalist moth, Spodoptera litura, and an oligophagous beetle, Cassida piperata, for the invasive plant species, Alternanthera philoxeroides, and the native species, Alternanthera sessilis. We found that elevated temperature altered the composition of the plant volatile emissions. Elevated temperature did not alter the behavioral preferences of S. litura and C. piperata to the invasive plant A. philoxeroides. However, elevated temperature indirectly increased the oviposition preference of the generalist moth to the native plant compared with the invasive plant. These results suggest that global warming might shift the oviposition preference of the generalist moth S. litura from an invasive plant to a native one, thereby potentially increasing damage to the native plants. These results are important for predicting alien plant invasions under future global warming scenarios.

中文翻译：

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升高的温度降低了天然草食动物对入侵植物的偏好

植物入侵威胁着全球生态系统和生物多样性。气候变暖通过影响植物与草食动物的相互作用，极大地挑战了植物入侵的管理。草食动物将植物挥发物用作信号来介导植物与草食动物之间的相互作用。但是，目前尚不清楚气候变暖是否会影响入侵植物的挥发物排放，从而改变天然草食动物的喜好。在这项研究中，进行了模拟变暖实验，以研究全能飞蛾，斜纹夜蛾和寡食甲虫Cassida piperata对入侵植物物种philiperoides和本地物种sessilis的偏爱。我们发现升高的温度改变了植物挥发性排放物的组成。升高的温度并没有改变斜纹夜蛾和Piperata对侵染植物A.philoxeroides的行为偏好。但是，与入侵植物相比，升高的温度间接增加了全能飞蛾对本地植物的产卵偏爱。这些结果表明，全球变暖可能将全能飞蛾斜纹夜蛾的产卵偏好从入侵植物转移到原生植物上，从而潜在地增加了对原生植物的损害。这些结果对于预测未来全球变暖情景下的外来植物入侵非常重要。这些结果表明，全球变暖可能将全能飞蛾斜纹夜蛾的产卵偏好从入侵植物转移到原生植物上，从而潜在地增加了对原生植物的损害。这些结果对于预测未来全球变暖情景下的外来植物入侵非常重要。这些结果表明，全球变暖可能使全能飞蛾斜纹夜蛾的产卵偏好从入侵植物转移到原生植物，从而潜在地增加了对原生植物的损害。这些结果对于预测未来全球变暖情景下的外来植物入侵非常重要。