基于繁殖生态学特征的气候变暖对菊科入侵植物入侵性影响及其机制研究

气候变暖与生物入侵是全球变化中的重大问题。本项目拟基于全球气候变暖背景下，以加拿大一枝黄花、大狼把草等菊科入侵植物及其近缘土著种多裂翅果菊为对象，通过野外定位观察和人工模拟增温等方法，开展全球气候变暖（增温）对开花物候、繁殖能力、植物-传粉者互作网络等方面的研究，从植物繁殖生态学的角度揭示全球气候变暖对植物入侵性的影响及其机制。并回答以下科学问题：①. 气候变暖是否通过改变入侵植物的开花持续时间和同步性，影响其开花模式，从而吸引更多的传粉者，导致其趋向于更为“泛化”的物种，并提高繁殖效率？②. 气候变暖是否通过增加繁殖投资，尤其是后代数量和质量，而提高其入侵性？本项目将从繁殖生态学的角度在理论上探明全球气候变暖对入侵植物入侵性的影响及其机制；其成果可丰富入侵植物的入侵机制，也可为农林生产、尤其是入侵植物的管理和防控等提供指导，为制定相应管理措施提供理论依据，具有重要科学意义和实践价值。

Climate warming and biological invasion are two major problems in current global change, and there are many scientific questions need to be solved urgently. So it had been being to an important hot spot in recent years. But few studies were conducted on the mechanism of effects of climate warming on invasiveness of invasive plants based on the reproductive ecology. . Here, we intend to study the effects of global climate warming on invasiveness of invasive plants from the perspective of reproductive ecology. Our objective is to reveal its mechanisms through the way of field location investigations and simulated warming experiments, and to answer the key scientific questions as follow: ①. How does the climate warming effect on reproductive features of invasive plants and their related native species? Such as the pattern of flowering phenology, the duration of flowering and flowering synchronicity, which impacts pollinator compose and resulting the invasive plants to be more generalization. And what are the differences between invasive and native species? ②. Whether climate warming impacts on the plant-pollinator interaction networks of invasive plants? Whether the climate warming promotes invasiveness of invasive plants through increasing reproductive allocation, especially increasing the offspring, such as seeds? The results of this study are expected to provide practical guidance for the agricultural and forestry production, and to provide basic rules for management, prevention and control of invasive plants.