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KEY CONCEPT Every ecosystem includes both living and nonliving factors.

KEY CONCEPT Every ecosystem includes both living and nonliving factors. plants. An ecosystem includes both biotic and abiotic factors. . Biotic factors are living things. plants animals fungi bacteria. sunlight. moisture. moisture temperature wind sunlight soil.

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KEY CONCEPT Every ecosystem includes both living and nonliving factors.

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  1. KEY CONCEPT Every ecosystem includes both living and nonliving factors.

  2. plants An ecosystem includes both biotic and abiotic factors. • Biotic factors are living things. • plants • animals • fungi • bacteria

  3. sunlight moisture • moisture • temperature • wind • sunlight • soil • Abiotic factors are nonliving things.

  4. Changing one factor in an ecosystem can affect many other factors. • Biodiversity is the assortment, or variety, of living things in an ecosystem. • Rain forests have more biodiversity than other locations in the world, but are threatened by human activities.

  5. keystone • A keystone species is a species that has an unusually large effect on its ecosystem.

  6. creation of wetland ecosystem increased waterfowl Population keystone species increased fish population nesting sites for birds • Keystone species form and maintain a complex web of life.

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