
八角金盘传粉昆虫及其访花行为
An observation on pollinating insects and their flowervisiting behavior on Fatsia japonica
王俊*,马玉心**,崔大练,王日昕,陆艳用,秦景
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作者单位:浙江海洋学院海洋科学学院舟山316000
中文关键词:八角金盘, 传粉昆虫, 访花行为, 访花频率陆艳用
英文关键词:Fatsia japonica, pollinators, flower visiting behavior, visiting frequencies
中文摘要: 八角金盘(Fatsia japonica(Thunb.)Dccne. et Planch.)为冬季开花植物,探讨其访花昆虫种类及访花行为对研究冬季开花植物的传粉生物学规律具有重要意义。对八角金盘访花昆虫种类、访花频率、访花时间、访花行为进行了初步研究。结果发现:八角金盘的传粉昆虫有2目、3科、3种,主要为膜翅目胡蜂科金环胡蜂Vespa mandarinia Smith、双翅目食蚜蝇科斜斑鼓额食蚜蝇Scaeva pyrastri (L.)及丽蝇科大头金蝇Chrysomya (Compsomyia) megacephala(Fabricius);八角金盘提供的酬物主要为花粉与花蜜,食蚜蝇舔食其花粉与花蜜,而金环胡蜂与大头金蝇主要吮吸花蜜;金环胡蜂、大头金蝇及斜斑鼓额食蚜蝇的访花高峰均在10:30—14:30;斜斑鼓额食蚜蝇访花时间较长,5~10 min,金环胡蜂访花时间较短,8~30 s,大头金蝇访花时间最短只有3~5 s。八角金盘具有较低的自花授粉能力,但主要为异花授粉植物。
英文摘要: Fatsia japonica(Thunb.)Dccne. et Planch is a winter blooming plant. In order to better understand of the pollination ecology of winter blooming plants the insect species visiting F. japonica, their visiting frequency, visiting duration and behavior were observed and recorded. Relatively few insects, mainly wasps and flies, visited F. japonica during winter and the peak of visitation was around midday. The most common visitors were Vespa mandarinia Smith (Hymenoptera, Vespidae), Scaeva pyrastri (L.) (Diptera, Syrphidae) and Chrysomya (Compsomyia) megacephala (Fabricius) (Diptera, Calliphoridae). Visiting frequency differed markedly among these three insects. The peak visiting frequency of Vespa mandarinia and Chrysomya (Compsomyia) megacephala occurred from 10: 30 to 14: 30Scaeva pyrastri fed on the nectar and the pollen of F. japonica and its visiting duration was around 5 to 10 minutes whereas Vespa mandarinia and Chrysomya (Compsomyia) megacephala fed on the nectar and made relatively short visits of 8 to 30 seconds and 3 to 5 seconds, respectively.