When Protected Areas or Restored Ecosystems Are Too Small, They

When protected areas or restored ecosystems are too small, they are unable to restore the high diversity present in the original ecosystem.One example of this is seen in the remnants of the tallgrass prairies, which once supported massive herds of bison, elk, deer, pronghorn, and their predators.Now, these massive herds have been reduced to very small populations.When populations reach such low numbers, they become difficult to maintain because of their lack of

A) natural disturbances.
B) nutrients.
C) human management.
D) sufficient functional groups.
E) genetic diversity.

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