2. A population is composed of individuals of the same species
living in an area.
A community includes all interacting species in an area.
An ecosystem is a defined space in which interactions take
place between a community and the physical environment.
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4. Thomas Nelson Community College
As energy moves from one trophic level to the next, 90% of the
useful energy is lost.
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5. A food chain is a series of
organisms occupying different
trophic levels.
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6. Thomas Nelson Community College
A food web is a series of
multiple, overlapping food
chains.
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7. The reintroduction of wolves to Yellowstone National Park:
◦ 1995 - 31 wolves were introduced
◦ 2006 - about 320 wolves observed
◦ The wolves have caused changes in the park
◦ Coyote and elk have declined.
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Yellowstone Wolf Reintroduction Video
