Anthropogenic flow intermittency is considered a severe disturbance for benthic macroinvertebrates with largely unknown impacts on the organization of benthic communities and their food webs. We analysed the community composition (as taxonomic composition and relative abundance of taxa) and food webs of the macroinvertebrates inhabiting the pools and riffles of two Mediterranean streams with contrasting perennial and anthropogenic intermittent flow regimes. Our analyses comprised monthly measurements in two pools and two riffles of the community composition, food‐web topology (the pattern in which specific links are arranged within the network) and food‐web complexity indexes (the number of nodes and links regardless of their identity or arrangement) over 1 year. The food webs revealed a significant annual variation in size, complexity, and diversity within pools and under perennial flow (e.g., number of nodes, number of links, link density). Multivariate analysis showed strong differences in the composition and relative abundance of taxa and food‐web topology of assemblages inhabiting pools and riffles. However, differences between communities inhabiting pools and riffles varied during the year; periods of great similarity were followed by periods in which communities were very different. This annual sequence of differences between pools and riffles was compressed under the anthropogenic flow intermittency regime. The anthropogenic intermittent flow studied here might represent a moderate stressor for Mediterranean communities well‐adapted to dry conditions. Still, the reported deviation of the community composition and food‐web topology from the reference status reflect the detrimental effect of this stressor on the benthic community.

中文翻译：

---

人为流动的间歇性影响着地中海河流食物网的拓扑结构和群落划分

人为的水流间歇性被认为是底栖大型无脊椎动物的一种严重干扰，对底栖生物群落及其食物网的组织影响很大程度上未知。我们分析了居住在两条地中海小溪的池和浅滩上的大型无脊椎动物的群落组成（作为分类学组成和相对分类单元的相对丰度）和食物网，与常年性和人为性间歇性流域形成对比。我们的分析包括对社区组成的两个集合和两个浅滩的每月测量，食物网拓扑（网络中特定链接的排列方式）和食物网复杂性指标（节点和链接的数量，无论其身份如何） （或安排）1年以上。食物网显示，其尺寸，复杂程度，池内和常年流量下的多样性（例如，节点数，链路数，链路密度）。多变量分析显示，居住在水池和浅滩的组合的分类单元和食物网拓扑的组成和相对丰度存在很大差异。但是，一年中池子和浅滩的社区之间存在差异。高度相似的时期之后是社区差异很大的时期。在人为流动间歇性制度下，池与浅滩之间的年度差异序列被压缩。此处研究的人为间歇性水流可能对适应干旱条件的地中海社区构成中等压力。仍然，