|Stormwater drain near Queen's Park|
Symptoms of poisoning in humans can include skin irritation, dizziness, numbness around the mouth, tingling in fingers and toes (produced by neurotoxins). Longer-term effects can include nausea, vomiting, diarrhoea and liver dysfunction. Animals can experience weakness, staggering, difficulty breathing and ultimately death.
So what are the "nutrients" in question and where do they come from? The primary chemical culprits are nitrogen and phosphorous. In urban areas they can be found in pollutants such as leaf litter from exotic trees (particularly in autumn), human sewage, animal waste, grass clippings, paper, detergent and industrial byproducts while in rural areas crop fertilizers can also impact on the levels of nitrogen and phosphorous in the water.
|Pollutants on the surface of water at Jerringot Wetlands|
|...at Jerringot Wetlands|
|Rubbish in the Barwon near Breakwater|
|Grass and other rubbish washed up during the recent rain|
|Reed beds at Balyang Sanctuary|
|Aquatic plants at Jerringot Wetlands|