Stormwater Pollution 1. Physical Silt and dirt make water muddy Less light for plants 2. Chemical Poison Fertiliser ( stimulates algae growth) 3. Biological Bacteria Introduced species 1. Brought in ship bilge water or changed ocean currents 2. Change the nature of the food chains Threatening Processes Industrial contamination 1. Factories In the 20 th century discharged waste into the Parramatta river ( Sydney harbour) 2. Chemicals such as dioxin are persistent organic pollutants that are passed through the food chain 3. Top level predators have more toxins through biomagnification
Stormwater Pollution1. Physical Silt and dirt make water muddy
Less light for plants2. Chemical Poison Fertiliser ( stimulates
algae growth)3. Biological Bacteria
Introduced species1. Brought in ship bilge water or changed
ocean currents2. Change the nature of the food chains
Threatening ProcessesIndustrial contamination1. Factories In the
20th century discharged waste into the Parramatta river ( Sydney
harbour)2. Chemicals such as dioxin are persistent organic
pollutants that are passed through the food chain3. Top level
predators have more toxins through biomagnification
