Experimental manipulation of floral scent bouquets restructures flower-visitor interactions in the field
Experimental manipulation of floral scent bouquets restructures flower-visitor interactions in the field
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DOI：
10.1111/1365-2656.12441
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发表时间：
2016-03-01
影响因子：
4.8
通讯作者：
Junker, Robert R.
中科院分区：
文献类型：
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作者：
Larue, Anne-Amelie C.;Raguso, Robert A.;Junker, Robert R.
自然群落的一个共同结构特征是不同营养级生物之间的成对相互作用的非随机分布。对于植物与动物的相互作用，据预测，随机过程和功能性植物性状，促进或防止相互作用是负责这些模式。然而，缺乏严格测试个体性状对群落结构影响的无偏的操纵性田间实验。我们通过在田间操作花香花束来解决这个问题。操纵花香花束导致定量和定性重组花访客网络，使他们更普遍。嗅觉仪试验证实了对香味花束的积极和消极反应。我们的研究结果清楚地表明，昆虫游客的分布两个丰富的研究植物物种反映了昆虫的物种特异性的喜好花的气味，而不是视觉或形态花的性状。因此，花的气味可能是主要的重要性，在分区花游客的相互作用。因此，整合实验操作的植物性状与现场观察的相互作用模式，是一个很有前途的方法，揭示的过程中，在自然界中的物种组合结构。
A common structural feature of natural communities is the non-random distribution of pairwise interactions between organisms of different trophic levels. For plant-animal interactions, it is predicted that both stochastic processes and functional plant traits that facilitate or prevent interactions are responsible for these patterns. However, unbiased manipulative field experiments that rigorously test the effects of individual traits on community structure are lacking. We address this gap by manipulating floral scent bouquets in the field. Manipulation of floral scent bouquets led to quantitative as well as qualitative restructuring of flower-visitor networks, making them more generalized. Olfactometer trials confirmed both positive and negative responses to scent bouquets. Our results clearly show that the distribution of insect visitors to the two abundant study plant species reflects the insects' species-specific preferences for floral scents, rather than for visual or morphological floral traits. Thus, floral scents may be of major importance in partitioning flower-visitor interactions. Integrating experimental manipulations of plant traits with field observations of interaction patterns thus represents a promising approach for revealing the processes that structure species assemblages in natural communities.