Fish biomass and density data for 3 intensively studied Wessex chalkstream sites, England, UK

Density and biomass of fish taxa from three chalkstreams in the Wessex chalk area: Nine Mile River, River Till and River Wylye. Data were collected on five occasions, between October 2012 and October 2013. The density of fish taxa at each of the three streams was estimated using benthic fish sampling and multi-pass electrofishing. The mean biomass of individuals of each taxon at each site on each occasion was then applied to the density estimates to derive an estimate of the biomass per m2 of each taxon at each site on each occasion. Data were collected to quantify food webs detailing the flux of mass and nutrients between nodes of the food web. This dataset was created as part of work package 3.2 of the Wessex Biodiversity & Ecosystem Service Sustainability (BESS) project.

本数据集收录了韦塞克斯白垩岩区域（Wessex chalk area）内三条白垩溪——九英里河（Nine Mile River）、蒂尔河（River Till）与怀利河（River Wylye）的各鱼类类群密度与生物量数据。数据采集工作于2012年10月至2013年10月期间分五次开展。针对上述三条溪流的各采样点位，研究人员采用底栖鱼类采样法与多次电渔法估算了各鱼类类群的种群密度。随后，研究人员将单次采样中各采样点位内单类群个体的平均生物量与密度估算值相结合，推导得到单次采样中各采样点位内单类群每平方米的生物量估算结果。本数据集的采集旨在量化食物网，以阐明食物网各节点间的物质与营养通量。该数据集是韦塞克斯生物多样性与生态系统服务可持续性（Wessex Biodiversity & Ecosystem Service Sustainability, BESS）项目3.2号工作包的研究成果之一。