Synthesis of organic compounds from atmospheric or aqueous carbon dioxide.- Primary production
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Study of the relationships between living organisms, including humans, and their physical environment.
Ecosystem processes, such as primary production, nutrient cycling, and niche construction, regulate the flux of energy and matter through an environment.
Mass of living biological organisms in a given area or ecosystem at a given time.
The total live biomass on Earth is about 550–560 billion tonnes C, and the total annual primary production of biomass is just over 100 billion tonnes C/yr.
Natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
Autotrophs produce more biomass energy, either chemically without the sun's energy or by capturing the sun's energy in photosynthesis, than they use during metabolic respiration.
Organism that produces complex organic compounds using carbon from simple substances such as carbon dioxide, generally using energy from light (photosynthesis) or inorganic chemical reactions (chemosynthesis).
Autotrophs do not need a living source of carbon or energy and are the producers in a food chain, such as plants on land or algae in water (in contrast to heterotrophs as consumers of autotrophs or other heterotrophs).
Uppermost layer of a body of water that receives sunlight, allowing phytoplankton to perform photosynthesis.
It also varies with seasonal changes in turbidity, which can be strongly driven by phytoplankton concentrations, such that the depth of the photic zone often decreases as primary production increases.
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact.
The remainder, that portion of GPP that is not used up by respiration, is known as the net primary production (NPP).
Part of a sea, lake, or river that is close to the shore.
This results in high primary production and makes the sublittoral zone the location of the majority of sea life.
Phytoplankton are the autotrophic (self-feeding) components of the plankton community and a key part of ocean and freshwater ecosystems.
Their cumulative energy fixation in carbon compounds (primary production) is the basis for the vast majority of oceanic and also many freshwater food webs (chemosynthesis is a notable exception).
Oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface.
The increased availability of nutrients in upwelling regions results in high levels of primary production and thus fishery production.
Dead plant material that have fallen to the ground.
Net primary production and litterfall are intimately connected.