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  2. Bioindicator - Wikipedia

    en.wikipedia.org/wiki/Bioindicator

    Caddisfly (order Trichoptera), a macroinvertebrate used as an indicator of water quality. [1] A bioindicator is any species (an indicator species) or group of species whose function, population, or status can reveal the qualitative status of the environment. The most common indicator species are animals. [2]

  3. Indicator bacteria - Wikipedia

    en.wikipedia.org/wiki/Indicator_bacteria

    Indicator bacteria can be cultured on media which are specifically formulated to allow the growth of the species of interest and inhibit growth of other organisms. Typically, environmental water samples are filtered through membranes with small pore sizes and then the membrane is placed onto a selective agar.

  4. Indicator organism - Wikipedia

    en.wikipedia.org/wiki/Indicator_organism

    The most common indicators are total coliforms, fecal coliforms, E. coli, and enterococci. [2] The presence of bacteria commonly found in human feces, termed coliform bacteria (e.g. E. coli), in surface water is a common indicator of faecal contamination.

  5. Biotic index - Wikipedia

    en.wikipedia.org/wiki/Biotic_index

    Pollution tolerant: These organisms will be found in polluted, as well as clean aquatic ecosystems (Leeches, Blood worms) Some index worksheets combine groups 2 and 3 together, giving only 3 groups. Each group has a number assigned to it and is multiplied by the number of organisms found in that group.

  6. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Nonpoint source pollution can be contrasted with point source pollution, where discharges occur to a body of water at a single location. The nonpoint sources of phosphates include natural decomposition of rocks and minerals, stormwater runoff , agricultural pollution , erosion and sedimentation , atmospheric deposition , and direct input by ...

  7. Saprobic system - Wikipedia

    en.wikipedia.org/wiki/Saprobic_system

    If a species can survive in both unpolluted and heavily polluted water, g is very small because finding the species in a survey has little predictive value. In practice, only indicator species with a weighting factor g ≥ 4 are used. For example, a caddisfly, Agapetus fuscipes, has a g value of 16, while the zebra mussel's value is g = 4.

  8. New Report Says Texas Waterway Pollution Worst in the Nation

    www.aol.com/news/report-says-texas-waterway...

    Texas has the dubious distinction of leading the nation in polluted waterways. A new report draws upon self disclosed data by industrial facilities provided to the EPA. The study counted 17 ...

  9. Biological monitoring working party - Wikipedia

    en.wikipedia.org/wiki/Biological_monitoring...

    The biological monitoring working party (BMWP) is a procedure for measuring water quality using families of macroinvertebrates as biological indicators. [1]The method is based on the principle that different aquatic invertebrates have different tolerances to pollutants.