Primary Productivity
- total Primary Production per year
- For land ➡️ kg / m2 yr.
- For water ➡️ kg / m3 yr.
Gross Primary Productivity (GPP)
- same as Primary Productivity
Net Primary Productivity (NPP)
- NPP = GPP - R (respiration)
- available biomass for consumers
Secondary Productivity
- creation of new biomass
- reflecting ➡️ utilisation part of the primary produce
- conversion into consumer biomass
- biomass ➡️ broken by Decomposers with the help of enzymes per unit time.
- E.g.: Humification