Freshwater macroinvertebrates are used as an indicator of water quality and river flow requirements due to the relative immobility and abundance.
This dataset contains site, sample, metric and taxa information from freshwater river macroinvertebrate surveys carried out across Wales by Natural Resources Wales and former Environment Agency Wales since 1978 and onwards. These surveys are conducted as part of on-going monitoring of river water quality for legislative requirements and to meet business drivers.
A version of this data is available in a Darwin Core format, please see NRW_DS122460 for more information.