The production of living matter by photosynthesizing organisms or by chemosynthesizing organisms. Usually expressed as grams of carbon per square meter per year.

the quantity of new organic matter created by photosynthesis.

Steps in the food chain up to and including harvesting, slaughter, milking and fishing among others.

The rate of photosynthesis of formation of energy rich organic compounds from inorganic compounds

the amount of biomass produced by green plants through photosynthesis.

the amount of organic material that plants synthesize from inorganic substances during photosynthesis

Production by plants resulting in biomass. Such production relies largely on energy from the sun. Most human consumption draws upon primary production, either direct—using materials derived directly from primary production, such as vegetables or wooden furniture—or indirect, for instance in gasoline, which draws upon millions of years of heat and pressure that turned prehistoric plants and animals into crude oil.

The amount of organic matter organisms synthesize from inorganic substances within a given volume of water or habitat in a unit of time.

the growth produced by the organisms on the bottom of the food chain (plants, algae), which fuels the rest of the food chain.

The rate of formation of organic matter or sugars in plant cells from light, water and carbon dioxide (Lat. primus first, producere to bring forward). Algae are primary producers.

the conversion of solar energy into chemical energy through photosynthesis in plants. Carbon dioxide and water are converted into organic material.

the conversion of solar energy into chemical energy via photosynthesis by marine plants in the surface waters of the ocean. During photosynthesis dissolved forms of carbon in the water are taken up by marine algae and converted to organic material.

The process by which organisms generate living material through photosynthesis or chemosynthesis. Since primary producers are at the bottom of the food chain, their productivity impacts the amount of food available for all other organisms within an ecological community.

The process in which organisms synthesise organic matter from inorganic materials, or the organic matter itself.

The increase in (dry) weight of green plants due to (net) photosynthesis; see assimilation.

Amount of organic material synthesised by organisms from inorganic substrata in a given area in a given period.

The production of natural products, for example meat, wool, crops, and wood, that are not turned into value-added products prior to selling, is referred to as primary production.

the biomass produced through photosynthesis and chemosynthesis in a community or group of communities.

The production of plant matter (plant tissues) from carbon dioxide and water through photosynthesis. By comparison, secondary production is the production of animal tissue. Different plant communities are often compared by measuring their rates of primary production.

The rate of production of new organic matter by plants.

Production by plants: 'primary' in being the first use of solar radiation, the main energy source for biological processes.

The amount of organic matter produced from inorganic matter by photosynthesis: for a water column, measured in g C m-2-2 h-1 (C is carbon).

The rate at which biomass is produced by photosynthetic or chemosynthetic organisms.

plants and animals produced by the agricultural and fisheries sector.

The assimilation of organic matter by autotrophs .

Production of a ‘food source’ by photosynthetic organisms at the bottom of the food chain.

Primary production is the production of organic compounds from atmospheric or aquatic carbon dioxide, principally through the process of photosynthesis, with chemosynthesis being much less important. All life on earth is directly or indirectly reliant on primary production. The organisms responsible for primary production are known as primary producers or autotrophs, and form the base of the food chain.