《环境昆虫学报》

入侵植物的繁殖特征是决定其能否成功入侵的关键，昆虫的访花行为会影响植物的繁殖成功率。为探究入侵植物在繁殖方面的入侵机制，于2022年3-11月对福州10种入侵植物的访花昆虫进行观测，记录访花昆虫的物种、数量、访花次数及停留时间，计算访花昆虫群落的物种多样性指数，并构建植物—访花昆虫网络。结果表明：（1）10种入侵植物共有访花昆虫6目34科66种，双翅目拥有较高的物种多样性且访花停留时间最长，膜翅目的访花频率最高且访问次数最多；（2）植物—访花昆虫网络显示，部分入侵植物与访花昆虫之间有较强互相的依赖性，访花网络存在明显的嵌套结构，网络结构稳定；（3）入侵植物能够在入侵地获取多种访花昆虫资源，并建立较为稳定的互作关系。植物与访花昆虫的互作关系是外来植物的入侵机制之一，为防止外来入侵植物利用入侵地传粉资源进一步入侵，建议在植物开花前将其清除。

英文摘要:

The reproductive characteristics of invasive plants are the key to their successful invasion, and the flower-visiting behavior of insects affects the reproductive success rate of plants. In order to explore the invasion mechanism of invasive plants in terms of reproduction, flower visiting insects of 10 invasive plants in Fuzhou were observed from March to November 2022. The species, quantity, frequency and residence time of flower-visiting insects were recorded, and the species diversity index of flower-visiting insect community was calculated, a plant-insect visitor network was constructed as well. The results showed that there were 66 species of flower-visiting insects in 6 orders, 34 families and 10 invasive plants, among which Diptera had a high species diversity and visited flowers for the longest time, Hymenoptera visited flowers the highest frequency and the most times. The plant- insect visitor network showed that there was a strong mutual dependence between some invasive plants and flower-visiting insects, and there was an obvious nesting structure in the flower-visiting insect network. The results further indicated that invasive plants could obtain a variety of flower-visiting insect resources in the invasion area and establish a relatively stable interaction relationship. The interaction between plants and flower-visiting insects is one of the invasion mechanisms of alien plants. To prevent further invasion by invasive alien plants using invasive pollination resources, we recommend removing plants before flowering.

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