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Quiz Ch. 4-6, vocab.
|biomass||mass of organisms per unit area|
|primary productivity||rate at which biomass is produced per unit area by plants (g m^2) gross primary|
|productivity (GPP)||total fixation of biomass/energy by photosynthesis. Some is lost by the plant when it respires (R) net primary productivity|
|(NPP)||the difference between GPP and R; the actual rate of production of new biomass that is available for consumers|
|What happens to the net energy absorbed?||1.Stored A. Change temperature of biomass B. Stored as chemical energy (PS); 2.Loss of energy to other ecosystems (G, ground heat flux); 3.Vaporize water (LE, latent heat flux via evapotranspiration); 4.Warm the air (H, sensible heat flux)|
|Roots vary in?||1) Size classes; 2)Depth; 3) Nutrient content ; 4) Respiration; 5) Turnover|