Human impacts mediate freshwater invertebrate community responses to and recovery from drought

Drought is an increasing risk to the biodiversity within rivers—ecosystems that are already impacted by human activities. However, the long-term spatially replicated studies needed to generate an understanding of how anthropogenic stressors alter ecological responses to drought are lacking. We studied aquatic invertebrate communities in 2500 samples collected from 179 sites on rivers emerging from England’s chalk aquifer over three decades. We tested two sets of alternative hypotheses describing responses to and recovery from drought in interaction with human impacts affecting water quality, fine sediment, water temperature, channel morphology, flow, and temporal change in land use. We summarized communities using taxa richness, an index indicating tolerance of anthropogenic degradation (average score per taxon, ASPT), and deviation from the average composition. Responses to drought were altered by interactions with human impacts. Poor water quality exacerbated drought-driven reductions..., Data was collected from several databases from the Environment Agency. Data was mostly processed in R., , # Human impacts mediate freshwater invertebrate community responses to and recovery from drought [https://doi.org/10.5061/dryad.3r2280gr8](https://doi.org/10.5061/dryad.3r2280gr8) ## Description of the data and file structure The data is divided into two sheets, one containing the biological response variables and the other one containing environmental predictors (including hydrological and human impact variables). The first column (A) of each sheet has a unique sample ID which can be used to link both sheets. A unique Site ID (Column C) and sample date (Column B) are also provided in both sheets. Rows represent unique samples. **In the sheet \"Biological responses\"**: Column D: Richness i.e., the number of invertebrate families in each sample Column E: distance to the community centroid as described in the main manuscript Column F: abundance-weighted ‘WHPT’ average score per taxon (ASPT): WHPT-ASPT, a biomonitoring index that reflects responses to organic pollution and general e...干旱正对已受人类活动影响的河流生态系统内的生物多样性构成日益加剧的威胁。然而，当前仍缺乏能够阐明人为胁迫如何改变生态系统对干旱响应的长期空间重复研究。本研究针对源自英格兰白垩含水层的河流的179个采样点，在三十年跨度内采集了2500份样本，以此分析水生无脊椎动物群落。我们检验了两套对立假说，用以描述在与影响水质、细颗粒物沉积物、水温、河道形态、径流以及土地利用时序变化的人类活动胁迫交互作用下，群落对干旱的响应与恢复过程。本研究通过类群丰富度、表征人为退化耐受度的每类群平均得分（average score per taxon, ASPT）指数以及与群落平均组成的偏离度来量化群落特征。结果显示，人类活动胁迫的交互作用会改变群落对干旱的响应，其中水质恶化会加剧干旱驱动的群落参数下降……本研究数据源自英国环境署（Environment Agency）的多个数据库，主要通过R语言完成数据处理。 # 人类活动胁迫调控淡水无脊椎动物群落对干旱的响应与恢复过程 https://doi.org/10.5061/dryad.3r2280gr8 ## 数据与文件结构说明 本数据集分为两个工作表：其一包含生物响应变量，其二包含环境预测变量（涵盖水文与人类活动胁迫变量）。 每个工作表的第一列（A列）为唯一样本ID，可用于关联两个工作表的数据。两份工作表均包含唯一样点ID（C列）与采样日期（B列），每一行对应一份独立样本。 **"生物响应"工作表**： D列：丰富度，即每份样本中的无脊椎动物科的数量 E列：群落质心距离，与正文手稿中的描述一致 F列：基于丰度加权的"WHPT"类群平均得分（ASPT）：WHPT-ASPT是一种生物监测指数，可反映群落对有机污染及general e...的响应