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Assessments for the Freshwater EHMP are based on 5 indicators: physical/chemical, nutrient cycling, ecosystem processes, aquatic macroinvertebrates, and fish.
Click on the indicators to the right for more detailed information.
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Methods |
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| - pH
- Conductivity
- Diel (24hr) range and maximum temperature
- Diel range and minimum dissolved oxygen
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Methods |
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| - Ratio of 15N to 14N stable isotopes
- Algal bioassay
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Methods |
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| - Growth rate of algae
- Ratio of 13C to 12C stable isotopes
- Respiration (R24)
- Gross Primary Production (GPP)
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Methods |
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| - Number of macroinvertebrate taxa
- PET richness (number of stonefly, mayfly and caddisfly families)
- Average SIGNAL score
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Methods |
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| - Proportion of native species expected
- Ratio of observed to expected species
- Proportion of alien fish
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