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Reduced water nutrient concentrations

Impact

Nutrient concentration refers to the amount of a nutrient within a waterway.  Nutrient concentrations can be increased by human activity.  Major sources of nutrients include runoff from agricultural areas (e.g. fertilisers), urban stormwater and wastewater (including sewage), eroded soils and aquaculture (OzEstuaries, 2005).  Nutrient load is an important determinant of water quality.

Suggested indicators: Nitrates in water*, Phosphates in water*
Reduced water nutrient load may be associated with:
Potential associated impacts Suggested indicators
Reduced potential for algal blooms
  • Microalgae in water*
Changed abundance fish and invertebrates
  • Fish*
  • Aquatic macro-invertebrates*

Changed health of terrestrial fauna that rely on water source
  • River & wetland fauna*
  • Native land fauna*
  • Exotic pest fauna*
Changed vegetation (aquatic and terrestrial) composition and condition
  • In-stream habitat*
  • Impacts on native vegetation*
Reduced shellfish contamination

* Yet to be developed

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