Ecosystems

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Ecosystems
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Living things Nonliving things
ECOSYSTEM
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What is an ecosystem?

• Ecosystem is a system of living things that
  interact with each other and with the physical
  world (nonliving things).
• A Biome is a collection of related ecosystems.

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Main Ecosystems

• Desert
• Rainforest
• Ocean
• Taiga

• Tundra
• Chaparral
• Grassland
• Temperate Forrest

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However..

• An ecosystem can be as large as the Sahara
  Desert, or as small as a puddle!!!

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Ecosystems have Living and Non-living Parts

• Abiotic (Non-living) Features
• Rocks
• Minerals
• Air
• Water

• Biotic (Living) Features
• Animals
• Plants
• Bacteria
• Fungus

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What makes ecosystems different?
Amount of water
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Amount of sunlight
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Type of soil
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What causes ecosystems to change? Natural causes
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Drought
Disease
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Fire
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Overpopulation
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What causes ecosystems to change? Changes caused
by humans
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Water pollution
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Air pollution
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Land pollution
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Construction
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How can humans help to prevent changes in
ecosystems?
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Use resources wisely
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Laws that control pollution
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Clean up litter
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Keep rivers and lakes clean