ENV100Y5 Lecture Notes - Lecture 13: Nitrogen Cycle, Energy, Carbon Cycle
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ENV100Y5 Full Course Notes
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Document Summary
Ecosystem ecology: studying of the interaction between organisms and their physical environment as a whole. 1. inputs, outputs, feedback, resilience, resistance, emergent properties: between biotic and abiotic components. Closed system :mass stays in the box while energy flows in and out. Open system:both mass and energy can flow in and out. Why should humans care about ecosystem: ecosystem provides humans with direct and indirect resources, including mining (direct), oxygen(indirect)-> economic benefits. 2. ecosystems provides a mechanistic understanding for the earth system. 4 main components of ecosystem: abiotic environment (water etc, producer, consumer, decomposer. How big is the ecosystem? it is nested and hierarchical. > u decide how big in is, but no matter what it is always part of bigger picture. Npp: net primary productivity (energy consumers and decomposers can use) Terrestrial: max npp-> wet tropics (limited by precipitation and temperature) Marine:max npp-> coastlines(limited by coastline and open ocean) Biochemical cycle: energy transfer between abiotic and biotic components.
