Pollinator effectiveness and fruit set in common ivy, Hedera helix (Araliaceae)
Pollinator effectiveness and fruit set in common ivy, Hedera helix (Araliaceae)
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DOI：
10.1007/s11829-009-9080-9
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发表时间：
2010-03-01
影响因子：
1.6
通讯作者：
Osborne, Juliet L.
中科院分区：
文献类型：
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作者：
Jacobs, Jennifer H.;Clark, Suzanne J.;Osborne, Juliet L.
常春藤（Hedera helix L.）为几种昆虫提供晚季花粉和花蜜，其果实是食果鸟类冬季和春季的食物来源。常春藤从昆虫授粉中受益，以坐果，但目前还不清楚哪些访花昆虫是最有效的授粉者。我们的观察结果表明，胡蜂是潜在的最有效的传粉者，因为他们是常客，有相对较快的觅食速度，携带大量的花粉粒在他们的身体和最高的“花粉潜力PP指数”得分（传粉者有效性的措施）的所有昆虫群体的检查。在0.5m2的样方中，常春藤花的坐果率与胡蜂的取食活动也呈线性正相关。因此，胡蜂的访问可能对确保鸟类常春藤果实的供应很重要。
Flowers of common ivy (Hedera helix L.) provide late season pollen and nectar for several insect groups, and its fruits are a winter and spring food source for frugivorous birds. Ivy benefits from insect pollination in order to set fruit, but it is unknown which flower-visiting insects are the most effective pollinators. Our observations suggest that Vespula wasps are potentially the most effective pollinators since they were frequent visitors, had relatively fast foraging rates, carried large numbers of pollen grains on their bodies and had the highest 'Pollination potential PP index' score (a measure of pollinator effectiveness) of all the insect groups examined. There was also a positive linear relationship between the proportion of ivy flowers that set fruit and wasp foraging activity in 0.5 m(2) quadrats. Visits by Vespula wasps may therefore be important for ensuring a supply of ivy fruits for birds.