What is productivity of an ecosystem?

HomeCategory: BiologyWhat is productivity of an ecosystem?
Mark Moon asked 1 month ago

Please explain the concept of productivity of an ecosystem

1 Answers
Mark Moon answered 1 month ago

An ecosystem includes autotrophs and heterotrophs. Autotrophs consist of plants, algae and some bacteria, while heterotrophs include animals fungi, most protists and bacteria and non-green plants.
Autotrophs (plants) are able to capture light energy and manufacture their own food. However, heterotrophs must obtain organic molecules that have been synthesized by autotrophs. The energy for survival of the heterotrophs is therefore dependent on autotrophs.
Approximately 1% to 5% of solar energy that falls on a plant is converted to food or other high quality organic materials. Primary productivity is a term used to describe the amount of organic matter produced by green plants from solar energy in a given area during a given period of time.
Gross Primary productivity is the total organic matter produced including that used by the photosynthetic organisms (green plants) for respiration. No subtraction is made from the total production.
Net primary Productivity is the total amount of energy fixed per unit of time minus the energy expended by the metabolic activities of the photosynthetic organisms in the community. It equals the gross primary productivity minus the amount of energy expended by the metabolic activities of the photosynthetic organisms.
Energy enters the ecosystem from the sun as a result of photosynthesis. It is slowly released as metabolic processes proceed. The autotrophs first acquire this energy through primary productivity and provide all the energy that heterotrophs use without which they will not survive. Primary productivity therefore becomes essential to the survival of ecosystems.