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Quiz Ch. 4-6, vocab.
Ecosystems Ecology
| Term | Definition |
|---|---|
| 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 |
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hcmeek