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- Water quality biological assessment[remove]7
- Environmental aspects2
- Stream ecology2
- Water quality2
- Benthic animals1
- Benthos1
- Biological systems1
- Environmental conditions1
- Environmental indicators1
- Freshwater invertebrates1
- Indicators (Biology)1
- Microbiological assay1
- Monitoring1
- Organic compounds1
- Organochlorine compounds1
- Pacific salmon1
- Pollution1
- River sediments1
- Standards1
- Trace elements1