APFIVE Eutrophication Positive Feedback Loop
A lake ecosystem experiences eutrophication after agricultural runoff increases. Which scenario represents a positive feedback loop in this disturbed food web?
A
Bacterial decomposition → nutrient sequestration → reduced algae
B
Algal blooms → oxygen depletion → fish die-off → nutrient release
C
Reduced fish predation → zooplankton increase → algal decline
D
Increased zooplankton → algae consumption → improved clarity
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