Communities, Food Chains/Webs and Succession (Chap. 46)

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Communities, Food Chains/Webs and Succession
(Chap. 46)
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Communities

• Open communities
• Closed communities

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Succession species or groups in a community
give way to the next

• Autogenic succession
• Allogenic succession

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• Primary succession
• Secondary succession

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Ecosystems
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• 1. Autotrophs (Producers)
• 2. Heterotrophs (Consumers)

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• 3. Detritivores (Decomposers)
• 4. Saprotrophs (Decomposers)
• Both are very important to break down nutrients
  in complex organic compounds that otherwise would
  be permanently locked up in dead organic matter

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Food Chain
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Food Web
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