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Quiz Ch. 4-6, vocab.

Ecosystems Ecology

TermDefinition
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
Created by: hcmeek
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