AP Environmental Science 8.5: Eutrophication
Practice AP Environmental Science questions on fertilizer runoff, detergents, eutrophication, algal blooms, hypoxia, and dissolved oxygen.
- Syllabus
- Effective Fall 2025
- Course
- AP Environmental Science
Practice AP Environmental Science questions on fertilizer runoff, detergents, eutrophication, algal blooms, hypoxia, and dissolved oxygen.
The following diagram shows how an area changed over time. The dominant vegetation in each stage is labeled in the diagram. Each roman numeral represents a stage in the ecological process.

Explain why an indicator of water quality other than temperature could be altered by the golf course in forest B.
Explain why an indicator of water quality other than temperature could be altered by the golf course in forest B.
Accept one of the following:
- There could be a decrease in dissolved oxygen because fertilizer runoff leads to algal blooms/eutrophication.
- There could be a decrease in sedimentation/turbidity because the grass will decrease erosion compared to the clear-cut land.
- There could be an increase in nitrates/phosphates due to fertilizer runoff resulting in algal growth/bloom.
1 point
Explain how the aquatic organisms living in the lake illustrated in the diagram of forest B are likely to be affected by the new golf course.
Begin your response to this question at the top of a new page in the separate Free Response booklet and fill in the appropriate circle at the top of each page to indicate the question number.
Explain how the aquatic organisms living in the lake illustrated in the diagram of forest B are likely to be affected by the new golf course.
Accept one of the following:
- Aquatic organisms would die off from a lack of oxygen created by the decomposition of algae/eutrophication.
- Aquatic organisms would survive at a higher rate because there is less sediment to suffocate them/clog their gills.
1 point