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Spatial resolution and location impact group structure in a marine food web.
Ecology Letters ( IF 8.8 ) Pub Date : 2020-07-12 , DOI: 10.1111/ele.13567
Mikael Ohlsson 1 , Anna Eklöf 1
Affiliation  

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.

中文翻译:

海洋食物网中的空间分辨率和位置影响组结构。

食物网中的生态过程取决于物种之间的相互作用。通过确定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邻近度如何影响组结构。我们检查了来自巴伦支海的数据集,其中描述了整个地区和25个次地区的食物网。我们比较(1)子区域到子区域和(2)子区域到子区域,测试网络中的组结构如何不同。我们发现,与次区域相比,超网中一半以上的物种会发生变化。在子区域之间,具有相似组结构的网络在空间上相关。有趣的是,尽管物种重叠对于群体结构的相似性很重要,但也有明显的例外。
更新日期:2020-07-12
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