Summary
Macroinvertebrate surveys of outflows from Bishop’s Sutton, above and below settlement ponds at Drayton Farm and Manor Farm watercress farms at Alresford, Hampshire were carried out using standard sampling techniques. The purpose was to repeat surveys undertaken in the autumn of 2019 and 2020 in order to investigate any changes and identify any potential water quality issues. The species present were typical of a chalk stream, with good diversity and water quality scores. A complete list of species is presented together with abundance and diversity (WHPT) scores. All the significant indices had increased from the previous year, probably due to weather conditions as the changes appeared across all four sites.
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