{'fraction_non_alphanumeric': 0.02278481012658228, 'fraction_numerical': 0.002531645569620253, 'mean_word_length': 5.703389830508475, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Can Benthic Macro‐Invertebrates Be Used to Assess the Impact of Pollution Incidents and Subsequent Recovery in Streams?

This paper describes an investigation into the use of benthic invertebrates to assess impact and recovery following transient pollution events in watercourses. The study showed that benthic macro‐invertebrates can be used to assess pollution impact and recovery in streams, provided that (a) the BMWP score is 40 or more (prior to the incident) and (b) there are adequate reference conditions. Monitoring should cover the whole area impacted by the pollutant to allow for spatial variation in benthic macro‐invertebrate communities supported by the watercourse. A decision‐making strategy for the use of macro‐invertebrates in pollution‐incident monitoring is provided.