Food Chains and webs

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  • Food chains and Webs
    • Organisms
      • Producers
        • Photosynthetic organsisms
          • Use light energy, CO2 and H2O to make organic substances
            • Photosynthesis process
      • Consumers
        • Eat producers to obtain energy
          • Directly eat producer- PRIMARY CONSUMER
            • Eat primary consumer- SECONDARY CONSUMER
              • Eat producers to obtain energy
                • Directly eat producer- PRIMARY CONSUMER
                  • Eat primary consumer- SECONDARY CONSUMER
        • Decomposers
          • Break down complex materials in PC and SC
            • Simple elements formed- release minerals that can be absorbed by plants
      • Food chains
        • Feeding relationship
          • Producers eaten by PC, who are eaten by SC, who are eaten by TC
            • Each stage is called a trophic level
              • Arrows show direction of energy flow
      • Food Webs
        • Do not rely on single food source
          • Many FCs linked to form web
            • Complex- one organism may be eaten by 20 different organisms
              • Likely that all organisms in habitat will be linked to others in web
    • Photosynthetic organsisms
      • Use light energy, CO2 and H2O to make organic substances
        • Photosynthesis process
    • Break down complex materials in PC and SC
      • Simple elements formed- release minerals that can be absorbed by plants
    • Each stage is called a trophic level
      • Arrows show direction of energy flow
    • Do not rely on single food source
      • Many FCs linked to form web
        • Complex- one organism may be eaten by 20 different organisms
          • Likely that all organisms in habitat will be linked to others in web

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