light is the primary source of energy for primary production.
light is the primary source of energy for primary production.
the primary source of energy for primary production is?
light
in ecology, primary production is the synthesis of organic compounds from atmospheric or aqueous carbon dioxide. it principally occurs through the process of photosynthesis, which uses light as its source of energy, but it also occurs through chemosynthesis, which uses the oxidation or reduction of inorganic chemical compounds as its source of energy. almost all life on earth relies directly or indirectly on primary production. the organisms responsible for primary production are known as "primary producers" or autotrophs, and form the base of the food chain. in terrestrial ecoregions, these are mainly plants, while in aquatic ecoregions algae predominate in this role. ecologists distinguish primary production as either "net" or "gross", the former accounting for losses to processes such as cellular respiration, the latter not.
primary production
primary production can be broken down into gross and net primary production. gross primary production is a measure of the energy that a photoautotroph harvests from the sun. take, for example, a blade of grass that takes in "x" joules of energy from the sun. the fraction of that energy that is converted into glucose reflects the gross productivity of the blade of grass. the energy remaining after respiration is considered the net primary production. in general, gross production refers to the energy contained within an organism before respiration and net production the energy after respiration. the terms can be used to describe energy transfer in both autotrophs and heterotrophs.
ecological efficiency