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1. What causes cultural eutrophication? Too many nutrients get into surface water
2. What are the effects of cultural eutrophication? First: Algal bloom. Eventually algae and submerged aquatic veg (shadowed by algae) dies. next: Many decomposers do cellular respiration -- feeding of this dead matter while consuming oxygen. Later: Dissolved oxygen in water is greatly reduced or deplet
3. What causes a high level of BOD? How does it affect DO? High BOD is a result of much organic waste in the water. It affects DO b/c bacteria have a higher demand for oxygen when there is more for them to eat. The higher the BOD, the lower the DO.
4. Give an example of a point source of pollution that contributes to cultural eutrophication. Wastewater treatment plant, CAFOs (feedlots, dairy, hog, and poultry farms)
5. Give an example of a nonpoint source of pollution that contributes to cultural eutrophication. Fertilizers used on lawns and crops; livestock on grazing land
6. What are some ways that individuals at their homes or businesses can prevent cultural eutrophication? Reduce fertilizer use on lawns; use phosphate-free detergents
7. Can a body of water recover from cultural eutrophication? How? Yes. After algae use up nutrients in water and no more nutrients get into the water. There’s less food for decomposers, so there are fewer of them – BOD declines and DO rises.
Created by: Hier snipe