Ecosystems and Food Webs

Help me understand ecosystems:

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Ecosystem Focus: ${{ECOSYSTEM}}
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Cover:
1. Ecosystem components
2. Biotic vs. abiotic factors
3. Producers, consumers, decomposers
4. Food chains and food webs
5. Energy flow and pyramids
6. Nutrient cycles
7. Population interactions
8. Symbiotic relationships
9. Ecosystem balance
10. Human impacts
11. Ecosystem examples
12. Diagram interpretation
13. Study questions
14. Investigation ideas