— CHAPTER MASTERY · CLASS 12

Ecosystem Important Questions.

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Key Concepts in Ecosystem

Structure of ecosystem: biotic (producers, consumers, decomposers) and abiotic componentsProductivity: gross primary (GPP), net primary (NPP) and secondary productivityEnergy flow: food chain, food web, trophic levels; 10% ruleDecomposition: detritus, fragmentation, catabolism, humification, mineralisationBiogeochemical cycles: carbon, phosphorus, water; ecosystem services

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