What do you mean by “productivity of an ecosystem? What types of productivity also mention the factors on which productivity of an ecosystem depends?
Productivity of an ecosystem is the rate at which solar radiation energy is fixed by the vegetation of an ecosystem per unit area & per unit time. It is generally expressed in terms of a unit of energy (cal)(cal) produced in a unit area (m2)(m2) per unit time (year). Productivity can be of two types: - Primary Productivity: - It is defined as the amount of biomass or organic matter produced per unit area by plants during photosynthesis over a given period. Primary productivity is of following two types: - Gross primary productivity (GPP): - It refers to the total amount of food formed by the producers during photosynthesis. Net primary productivity (NPP): - It refers to gross primary productivity minus loss by respiration (R). NPP = GPP - RNPP = GPP - R Secondary Productivity: - Secondary productivity is the rate of storage at the consumer level. It is defined as the rate at which organic matter is synthesized by consumers over a given period. Primary productivity is determined by: - Several environmental factors. Availability of nutrients. Photosynthetic capacity of plants
