Biologist John Terbough did a study of some newly formed islands in a lake in Venezuela. Some of the islands had predators and some did not. What did the study show?
A) The island ecosystems stabilized after awhile in both cases, so predators were not vital.
B) Predators eventually moved to the islands without any, and the ecosystems stabilized.
C) Islands with predators had lower biodiversity.
D) There was no difference at first, but eventually the predators killed off all the prey and destabilized those ecosystems.
E) Predators were stabilizing because without predators the grazers stripped all the vegetation and died off.
Correct Answer:
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