KEY%20CONCEPT%20Every%20ecosystem%20includes%20both%20living%20and%20nonliving%20factors.

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KEY CONCEPT Every ecosystem includes both living
and nonliving factors.
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An ecosystem includes both biotic and abiotic
factors.

• Biotic factors are living things.
• plants
• animals
• fungi
• bacteria

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• Abiotic factors are nonliving things.

• moisture
• temperature
• wind
• sunlight
• soil

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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.

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

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• Keystone species form and maintain a complex web
  of life.

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Objectives

• Identify the source of energy for life processes.

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Standards Addressed

• The following standard will be addressed
• B-3.6

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KEY CONCEPT Life in an ecosystem requires a
source of energy.
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Producers provide energy for other organisms in
an ecosystem.

• Producers get their energy from non-living
  resources.
• Producers are also called autotrophs because they
  make their own food.

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Producers provide energy for other organisms in
an ecosystem.

• Consumers are organisms that get their energy by
  eating other living or once-living resources.

• Consumers are also called heterotrophs because
  they feed off of different things.

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Almost all producers obtain energy from sunlight.

• Photosynthesis most producers uses sunlight as an
  energy source.
• Chemosynthesis prokaryote producers uses
  chemicals as an energy source.