Department of Physics, Chemistry and Biology, Linköping University, Linköping, SE-581 83, Sweden.
Ecol Lett. 2020 Oct;23(10):1451-1459. doi: 10.1111/ele.13567. Epub 2020 Jul 12.
Ecological processes in food webs depend on species interactions. By identifying broad-scaled interaction patterns, important information on species' ecological roles may be revealed. Here, we use the group model to examine how spatial resolution and proximity influence group structure. We examine a data set from the Barents Sea, with food webs described for both the whole region and 25 subregions. We test how the group structure in the networks differ comparing (1) the regional metaweb to subregions and (2) subregion to subregion. We find that more than half the species in the metaweb change groups when compared to subregions. Between subregions, networks with similar group structure are spatially related. Interestingly, although species overlap is important for similarity in group structure, there are notable exceptions. Our results highlight that species ecological roles vary depending on fine-scaled differences in the patterns of interactions, and that local network characteristics are important to consider.
食物网中的生态过程取决于物种相互作用。通过识别广泛的相互作用模式，可以揭示有关物种生态角色的重要信息。在这里，我们使用组模型来研究空间分辨率和接近度如何影响组结构。我们检查了巴伦支海的数据，该数据描述了整个地区和 25 个分区的食物网。我们测试了网络中的组结构如何不同，比较了（1）区域元网与分区和（2）分区与分区。我们发现，与分区相比，元网中有一半以上的物种改变了组。在分区之间，具有相似组结构的网络在空间上是相关的。有趣的是，尽管物种重叠对于组结构的相似性很重要，但也存在明显的例外。我们的结果表明，物种的生态角色取决于相互作用模式的细微差异，并且局部网络特征很重要。
