A direct ecological consequence of overfishing is which of the following?

• A. Decreased top predator populations
• B. Increased top predator populations
• C. More coral growth
• D. Increased nutrient cycling

Answer: (A)

Direct removal of apex predators through fishing directly lowers their populations because fishing removes individuals from the ecosystem itself. When large, top-trophic-level fish are harvested faster than they can reproduce, their numbers drop, making the loss a direct consequence of the practice. This isn’t about longer-term secondary effects; it’s the immediate result of targeting those species.

That’s why the decline in top predator populations is the best answer. The other options don’t match what happens directly: overfishing doesn’t cause top predators to increase; coral growth isn’t guaranteed to rise as a direct outcome of predator removal (coral health can even be hampered by ecosystem imbalances linked to fishing); and nutrient cycling isn’t an immediate, direct consequence of removing apex predators, since it depends on a broader set of processes and inputs.