Feeding environment and other traits shape species' roles in marine food webs
Feeding environment and other traits shape species' roles in marine food webs
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DOI：
10.1111/ele.12955
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发表时间：
2018-06-01
期刊：
影响因子：
8.8
通讯作者：
Eklof, Anna
中科院分区：
文献类型：
--
作者：
Cirtwill, Alyssa R.;Eklof, Anna
食物网和中尺度图案使我们能够理解生态群落的结构，并定义物种在其中的作用。这种从物种层面看待网络的观点允许测试物种特征与其直接和间接相互作用模式之间的关系。这种关系可以让我们根据更容易获得的性状信息来预测食物网结构。在这里，我们计算了物种的作用（作为基序位置频率的矢量），在六个良好的解决海洋食物网，并确定了基序的位置与物种的角色的最大变化。然后，我们测试了这些位置的频率是否随物种的性状而变化。尽管我们使用了粗粒度的特征，但我们的方法还是发现了特征和基序之间的一些强关联。觅食环境是我们模型中的一个关键特征，可能通过影响相遇概率来塑造物种的角色。将环境纳入未来的食物网模型可能会改善对未知网络结构的预测。
Food webs and meso-scale motifs allow us to understand the structure of ecological communities and define species' roles within them. This species-level perspective on networks permits tests for relationships between species' traits and their patterns of direct and indirect interactions. Such relationships could allow us to predict food-web structure based on more easily obtained trait information. Here, we calculated the roles of species (as vectors of motif position frequencies) in six well-resolved marine food webs and identified the motif positions associated with the greatest variation in species' roles. We then tested whether the frequencies of these positions varied with species' traits. Despite the coarse-grained traits we used, our approach identified several strong associations between traits and motifs. Feeding environment was a key trait in our models and may shape species' roles by affecting encounter probabilities. Incorporating environment into future food-web models may improve predictions of an unknown network structure.