Question

the hypothetical scenario of overfishing predatory fish can cause a surge in the population of fish due to reduced predation pressure.
the in an ecosystem directly benefit from the alteration of the landscape created by elephants in savanna ecosystems.
species play a disproportionately influential role in an ecosystem, impacting biodiversity beyond their abundance.

Explanation:

Predatory fish eat other fish. When over - fished, the fish they prey on (prey fish) have less predation pressure and their population can surge. Elephants in savanna ecosystems modify the landscape, and plants that benefit from new conditions like increased sunlight or water access are plant species. Keystone species have a large impact on an ecosystem relative to their abundance.

Answer:

1. prey
2. plant
3. Keystone