Are insect pollinators more generalist than insect herbivores?
Are insect pollinators more generalist than insect herbivores?
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DOI：
10.1098/rspb.2009.0635
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发表时间：
2009-08-22
影响因子：
4.7
通讯作者：
Dajoz, Isabelle
中科院分区：
文献类型：
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作者：
Fontaine, Colin;Thebault, Elisa;Dajoz, Isabelle
最近的社区一级研究承认，通才物种比以前认为的更广泛，并强调了它们对社区功能和进化的主要影响。这表明，相互作用的类型，营养与互惠，应影响物种的泛化水平，但是，还没有直接的比较。在这里，我们进行了这样的比较，使用44植物昆虫网络描述授粉或草食动物群落。我们的分析表明，相互作用的类型确实有影响的各个方面的物种的普遍性，从分布的普遍性在社会上的系统发育多样性的植物与一个给定的昆虫物种相互作用。然而，所观察到的差异的幅度取决于方面的物种泛化研究。虽然非定量和定量的措施，一般认为，传粉者与更多的植物物种，更均匀地比草食动物，系统发育的措施清楚地表明，草食动物与植物物种的相互作用更密切相关，比传粉者。这种比较的方法提供了一个很有前途的视角，以更好地了解多物种组合的功能和进化，指出一些基本的奇异性社区取决于所考虑的相互作用的类型。
Recent community-level studies have acknowledged that generalist species are more widespread than previously thought and highlighted their preponderant impact on community functioning and evolution. It is suggested that the type of interaction, trophic versus mutualistic, should affect species generalization level; however, no direct comparison has been made yet. Here, we performed such a comparison using 44 plant-insect networks describing either pollination or herbivory communities. Our analysis shows that the type of interaction does indeed have an impact on various aspects of species generalism, from the distribution of generalism in the community to the phylogenetic diversity of the plants with which a given insect species interacts. However, the amplitude of the observed differences depends on the aspect of species generalism studied. While the non-quantitative and quantitative measures of generalism suggest that pollinators interact with more plant species and more evenly than herbivores, phylogenetic measures clearly show that herbivores interact with plant species far more closely related to each other than pollinators. This comparative approach offers a promising perspective to better understand the functioning and evolution of multispecies assemblages by pointing out some fundamental singularities of communities depending on the type of interaction considered.