What is eutrophication?
build up of nitrates and phosphates in a river or lake leading to rapid growth of algae, accumulation of dead organic matter, high rate of ecomposition and lack of oxygen.
Evaluate the impacts of eutrophication?
Includes death of aerobic organisms (fish), increased turbidity, loss of macrophytes, reduction in length of food chains and loss of species diversity. Aquatic plant growth increases.
What causes Eutrophication?
Leaching of fertiliser and chemicals into a lake or river - this leads to the build up of nitrates and phosphates (See earlier 'What is eutrophication?' definition for more details)
How can human activity be altered to reduce Eutrophication?
Introduce fines for dumping
Educate farmers and industry on the consequences
Alternative strategy for reducing the pollution?
Use of alternative fertilisers.
How can we clean up eutrophication and restore rivers and lakes?
Remove or reduce nitrates and phosphates using chemical treatments
Scoop out algae (Big nets!)
Re-introduce fish, marine life
Evaluate strategies for reducing pollution such as using alternative fertilisers?
Could be not as effective fertilisers, or could cause more damage or other consequences. Cost.
Evaluate strategies for altering human activity such as fines and education for farmers and industry.
Needs staff and time to enforce regulations. Cost, administration etc.