ENVS 3010 Lecture Notes - Lecture 16: Negative Temperature, Tropical And Subtropical Moist Broadleaf Forests, Decomposer
20 Dec 2017
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Document Summary
Lecture 16: climate change effects on npp and nep. Amazon, and longer growing seasons that come with increased temperatures in the north). Nasa-npp and warming: as temps continue to rise, benefits to plants begin to deplete, longer and more frequent droughts. Increased npp in temperature limited ecosystems: temperate, boreal, arctic warming, warm, dry ecosystems water deficiencies may prevent npp response to, hot, tropical ecosystems lots of available water, but species may be close to upper temperature limits. Ecosystem carbon cycle: fluxes: animals do heterotrophic respiration, but the far majority of carbon that leaves the ecosystem comes from heterotrophic respiration by microorganisms doing decomposition! If outputs larger than inputs= speed up temp changes. Decomposition (heterotrophic respiration: organic matter decomposed into, complex organic compounds (recalcitrant)(humus, mineralization, mineral nutrients, co2, the main carbon release via heterotrophic respiration comes from decomposition. Decomposition is the break down of organic matter via microbial activity.
