NSES Content Standard C
Life Science: The interdependence of organisms Grades 9-12, page 186 Organisms both cooperate and compete in ecosystems. The interrelationships
and interdependencies of these organisms may generate ecosystems that are
stable for hundreds or thousands of years.
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Benchmark 5D The Living Environment:
Interdependence of Life
Grades 9-12, page 117
Ecosystems can be reasonably stable over hundreds or thousands of years.
As any population of organisms grows, it is held in check by one or more
environmental factors: depletion of food or nesting sites, increased loss
to increased numbers of predators, or parasites. If a disaster such as
flood or fire occurs, the damaged ecosystem is likely to recover in stages
that eventually result in a system similar to the original one.