{'fraction_non_alphanumeric': 0.012557077625570776, 'fraction_numerical': 0.001141552511415525, 'mean_word_length': 5.544776119402985, '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}}
Biological assessment of water quality in northern Portugal using a method combining species tolerance and diversity along the longitudinal axis

Based on the benthic macroinvertebrate community, a multiple biotic index was defined, determined by the diversity parameter H' from Shannon-Weaver and by the sensitivity of a list of organisms to eutrophication. This compiled list was derived using a multivariate technique -DECORANAwhich allowed the characterization of a species according to its typological level and tolerance to organic loads. The method presented here takes into account the fauna1 composition and diversity patterns from the upper to the lower reaches and also the temporal variability. Thus, more reliable comparisons can be achieved in the evaluation of water quality for different order reaches of the river system, independent of seasonal fluctuations.