Primary Producers

Primary producers are the organisms in an ecosystem that produce biomass from inorganic compounds (autotrophs). In almost all cases these are photosynthetically active organisms (plants, cyanobacteria and a number of other unicellular organisms; see article on photosynthesis). However, there are examples of archea (unicellular organisms) that produce biomass from the oxidation of inorganic chemical compounds (chemoautotrophs) in hydrothermal vents in the deep ocean.

Fungi and other organisms who gain their biomass from oxidizing organic materials are called decomposers and are not primary producers.

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Other articles related to "primary producers, primary":

Plant Evolution - Photosynthesis - Cyanobacteria and The Evolution of Photosynthesis
... Cyanobacteria remained principal primary producers throughout the Proterozoic Eon (2500–543 Ma), in part because the redox structure of the oceans favored photoautotrophs ... Green algae joined blue-greens as major primary producers on continental shelves near the end of the Proterozoic, but only with the Mesozoic (251–65 Ma) radiations of ... remain critical to marine ecosystems as primary producers in oceanic gyres, as agents of biological nitrogen fixation, and, in modified form, as the plastids of marine algae ...
Lake Ecosystem - Important Abiotic Factors - Chemistry
... photosynthesis and very low values at night when respiration is the dominant process of primary producers ... animal matter that “rains” down from the pelagic and benthic zones and the inability to support primary producers (Brown 1987) ... in large quantities in freshwater systems, limiting photosynthesis in primary producers, making it the main determinant of lentic system production ...
Primary Producers - See Also
... Primary production Modelling ecosystems – trophic components General Abiotic component Abiotic stress Behaviour Biogeochemical cycle Biomass Biotic component ...
Aquatic Biodiversity Research - Terrestrial Vs. Marine Biodiversity
... The main marine primary producers are very small and often mobile, whereas on land primary producers are large and static ... The standing stock of grazers is higher than that of primary producers in the sea, the reverse of the situation on land ...

Famous quotes containing the words producers and/or primary:

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