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Published in Frank R. Spellman, Fundamentals of Wastewater-Based Epidemiology, 2021
The biotic index is a systematic survey of macroinvertebrates organisms. Because the diversity of species in a stream is often a good indicator of the presence of pollution, the biotic index can be used to correlate with stream quality. Observation of types of species present or missing is used as an indicator of stream pollution. The biotic index, used in the determination of the types, species, and numbers of biological organisms present in a stream, is commonly used as an auxiliary to BOD determination in determining stream pollution. The biotic index is based on two principles: A large dumping of organic waste into a stream tends to restrict the variety of organisms at a certain point in the stream.As the degree of pollution in a stream increases, key organisms tend to disappear in a predictable order. The disappearance of particular organisms tends to indicate the water quality of the stream.
Biomonitoring, Monitoring, Sampling, and Testing
Published in Frank R. Spellman, Handbook of Water and Wastewater Treatment Plant Operations, 2020
The biotic index is a systematic survey of macroinvertebrates organisms. Because the diversity of species in a stream is often a good indicator of the presence of pollution, the biotic index can be used to correlate with stream quality. Observation of types of species present or missing is used as an indicator of stream pollution. The biotic index, used in the determination of the types, species, and numbers of biological organisms present in a stream, is commonly used as an auxiliary to BOD determination in determining stream pollution. The biotic index is based on two principles: A large dumping of organic waste into a stream tends to restrict the variety of organisms at a certain point in the stream.As the degree of pollution in a stream increases, key organisms tend to disappear in a predictable order. The disappearance of particular organisms tends to indicate the water quality of the stream.
Environmental Biomonitoring, Sampling, and Testing
Published in Frank R. Spellman, The Science of Water, 2020
The biotic index is a systematic survey of macroinvertebrates organisms. Because the diversity of species in a stream is often a good indicator of the presence of pollution, the biotic index can be used to correlate with stream quality. Observation of types of species present or missing is used as an indicator of stream pollution. The biotic index, used in the determination of the types, species, and numbers of biological organisms present in a stream, is commonly used as an auxiliary to BOD determination in determining stream pollution.
Effects of forested buffers on benthic macroinvertebrate indicators of water quality in the Western Finger Lakes, New York
Published in Inland Waters, 2021
Mitchell C. Owens, Clayton J. Williams, James M. Haynes
The New York State Department of Environmental Conservation BAP for ponar samples from soft sediments (NYSDEC 2014) was used to assess the water quality experienced by sampled organisms collected by this project’s equivalent sampling method in soft sediments in the 4 focal lakes. The BAP index score was calculated by determining species richness (total number of different taxa identified), Hilsenhoff biotic index (a biotic index calculated using values indicating the overall water quality tolerance of taxa found), dominance-3 (the combined percentage of the sample made up by the 3 dominant taxa), percent model affinity (a measure indicating how well a community fits to an ideal community composition model for a given habitat and sampling method; in this case, a ponar sample), and species diversity (a measure of richness and evenness of taxa found). All indicators were normalized on a 0–10 scale (with 0–2.5 meaning severely impacted, 2.5–5 moderately impacted, 5–7.5 slightly impacted, and 7.5–10 non-impacted) and averaged across indicators to provide one score per sample (NYSDEC 2014).
The use of macroinvertebrate based biotic indices and diversity indices to evaluate the water quality of Lepenci river basin in Kosovo
Published in Journal of Environmental Science and Health, Part A, 2020
Ferdije Zhushi Etemi, Pajtim Bytyçi, Murtezan Ismaili, Osman Fetoshi, Prespa Ymeri, Albona Shala–Abazi, Nesade Muja-Bajraktari, Marton Czikkely
SWRC biotic index is used to monitor river water quality taking into account two variables, species abundance and their values of pollution tolerance.[47,48] where TV = value of a taxon’s tolerance, d = density of each taxon, D = Total amount of density.