BIOB50H3 Lecture Notes - Lecture 6: Feces, Normalized Difference Vegetation Index, Chlorophyll
8 Oct 2015
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Document Summary
Energy assimilated by autotrophs is stored as carbon compounds in plant tissues: carbon is the currency used for the measurement of primary production. Primary productivity is the rate of primary production: gross primary production (gpp) total amount of carbon fixed by autotrophs in an ecosystem. Energy from sun > everything else: net primary production (npp) the energy left after plant respiration. Npp is the energy that results in plant biomass, and represents the total net input of carbon into ecosystems carbon storage -> oil/gas. Plants can allocate their carbon in 2 ways: aboveground. Leaf carbon can be measured in leaf area index (lai) Lai = 1 means that 100% of the ground is covered by leaves: lai varies among biomes: Less than 0. 1 in arctic tundra (less than 10% of the ground surface has leaf cover) 12 in boreal and tropical forests (on average, there are 12 layers of leaves between the canopy and the ground)
