The impact of an alien plant on a native plant-pollinator network: an experimental approach
The impact of an alien plant on a native plant-pollinator network: an experimental approach
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DOI：
10.1111/j.1461-0248.2007.01055.x
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发表时间：
2007-07-01
期刊：
影响因子：
8.8
通讯作者：
Memmott, Jane
中科院分区：
文献类型：
--
作者：
Lopezaraiza-Mikel, Martha E.;Hayes, Richard B.;Memmott, Jane
对成对互作的研究表明，外来植物可以影响本地植物的授粉，这种影响是由共享传粉者介导的。在这里，我们使用操纵性田间实验，调查外来植物凤仙花对整个同花本土植物群落的影响。构建了探访和花粉运输网络，比较了重复性的腺蛾入侵样地和摘除样地。入侵样地的访客物种丰富度、访客丰度和访花次数均显著高于对照。然而，在入侵的样地中，花粉运输网络以外来花粉粒为主，因此较高的探访可能不会促进授粉。一般昆虫更有可能访问外来植物，膜翅目和半翅目比鞘翅目更有可能访问外来植物。我们的数据表明，广义的本地传粉者可以为外来植物整合到本地访问系统中提供一条途径。
Studies of pairwise interactions have shown that an alien plant can affect the pollination of a native plant, this effect being mediated by shared pollinators. Here we use a manipulative field experiment, to investigate the impact of the alien plant Impatiens glandulifera on an entire community of coflowering native plants. Visitation and pollen transport networks were constructed to compare replicated I. glandulifera invaded and I. glandulifera removal plots. Invaded plots had significantly higher visitor species richness, visitor abundance and flower visitation. However, the pollen transport networks were dominated by alien pollen grains in the invaded plots and consequently higher visitation may not translate in facilitation for pollination. The more generalized insects were more likely to visit the alien plant, and Hymenoptera and Hemiptera were more likely to visit the alien than Coleoptera. Our data indicate that generalized native pollinators can provide a pathway of integration for alien plants into native visitation systems.