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Biological production

the capture of Usable energy from the environment to produce organic compounds in which that energy is stored

Biomass

Total amount of organic Matter on earth or in any ecosystem or area

Autotrophs

Self nourishing

Primary production

Production by autotrophs

Photosynthesis

Producing sugar from sunlight, carbon dioxide, and water

Chemoautotrophs

Organism deriving energy from inorganic sulfur compounds

Heterotrophs

Organisms that must feed on other living things

Secondary production

Production by heterotrophs

Respiration

the metabolic processes whereby certain organisms obtain energy from organic molecules

Gross production

Product of organic matter before use

Net production

gross production - respiration

Ecosystem energy flow

movement of energy through an ecosystem from the external environment through a series of organisms and back to external environment.

Thermodynamic system

Energy source and energy sink combined.

Tropic-level efficiency

Ratio of production of one tropic level to the production of the next tropic level

Entropy

(communication theory) a numerical measure of the uncertainty of an outcome

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