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

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KEY CONCEPT Every ecosystem includes both living
(biotic) and nonliving (abiotic) factors.
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• 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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Every ecosystem contains biotic and abiotic
factors

• List the biotic and abiotic factors in this
  picture

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• 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. (50 of the worlds plant and
  animals species are here)

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• Biodiversity has to do with

Number of species NOT Population number
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• Extinctions lower biodiversity!!!

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

• Their removal from the ecosystem may cause a
  ripple effect felt across an entire ecosystem

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• By felling trees to construct dams, Beavers
• Change free flowing streams into ponds, wetlands,
  and meadows
• Lead to an overall increase in biodiversity

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• More variety of fish- Fish attract birds
• Insects inhabit pond and dead trees along the
  shore- Insects attract birds
• Animals that prey on birds are attracted to the
  pond