This data product combines macroinvertebrate taxonomic abundance for 1,519 monitoring sites across English rivers for the period between 1965 and 2018, with matched concentrations of 41 water quality determinands, river flow exceedance statistics, and air temperature values. It also includes site variables such as sewage effluent exposure, habitat quality, land cover in the upstream catchment, and other physical parameters measured at the sampling point, such as altitude, slope, distance from source, width and depth of the channel, and type of substrate. Developed as part of the ChemPop (2018-2023), a NERC-funded project investigating the impact of chemical exposure on wildlife populations in rivers, this research output is an open data product for use in a broad spectrum of environmental data and modelling analyses. Full details about this dataset can be found at https://doi.org/10.5285/23f194b0-1e21-4f14-be9c-6eabdcc1feb7

The dataset contains stable isotope concentration (d13C and d15N) and community abundance data for a range of aquatic macroinvertebrate taxa measured during a mesocosm drought experiment. The aquatic macroinvertebrates were sampled from four mesocosm system blocks at the Llyn Brianne Experimental Observatory. There were three experimental treatments included within each block (100% [control], 50%, and 10% of the baseflow discharge). Samples were collected before the treatments, and after 30 days of exposure to the treatments. Taxa were identified down to family level for abundance measurements. The work was supported by the Natural Environment Research Council (NE/X010597/1), as part of a study to understand ecosystem responses to environmental change through quantifying ecological interactions in freshwater systems. Full details about this dataset can be found at https://doi.org/10.5285/a62a2f1c-2ed4-4ec9-b22c-c3b340a63ca5

[THIS DATASET HAS BEEN WITHDRAWN]. This data product combines macroinvertebrate taxonomic abundance for 1,519 monitoring sites across English rivers for the period between 1965 and 2018, with concentrations of 41 water quality determinands, river flow measurements and air temperature derived values. It also includes site variables such as sewage effluent exposure, habitat quality, land cover in the upstream catchment and other physical parameters measured at the sampling point such as altitude, slope, distance from source, width and depth of the channel, and type of substrate. Developed as part of the ChemPop (2018-2023), a NERC-funded project investigating the impact of chemical exposure on wildlife populations in rivers, this research output is an open data product for use in a broad spectrum of environmental data and modelling analyses. Full details about this dataset can be found at https://doi.org/10.5285/faa526cc-52f5-4468-97bb-295660bcea34