primary productivity

См. также в других словарях:

• Primary production — For other uses, see Primary production (economics). Global oceanic and terrestrial photoautotroph abundance, from September 1997 to August 2000. As an estimate of autotroph biomass, it is only a rough indicator of primary production potential,… …   Wikipedia

• primary — I. adjective Etymology: Middle English, from Late Latin primarius basic, primary, from Latin, principal, from primus Date: 15th century 1. first in order of time or development ; primitive < the primary stage of civilization > < the primary… …   New Collegiate Dictionary

• Productivity (disambiguation) — Productivity, in economics, is the amount of output created produced per unit input used.Productivity may also refer to:*Productivity (linguistics), the degree to which a grammatical process can be extended to new cases *Social productivity, the… …   Wikipedia

• gross primary productivity —   the addition, through photosynthesis, of organic matter in plants measured in dry grammes per square metre per year …   Geography glossary

• net primary productivity —   the amount of organic material available for consumption in a given area. GPP minus losses due to plant respiration …   Geography glossary

• productivity — pro·duc·tiv·i·ty (prō dŭk tĭvʹĭ tē, prŏd ək ) n. 1. The quality of being productive. 2. Economics. The rate at which goods or services are produced especially output per unit of labor. 3. Ecology. The rate at which radiant energy is used by… …   Universalium

• Agricultural productivity — Food production per capita (1961 2005) …   Wikipedia

• Glossary of environmental science — This is a glossary of environmental science.Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and… …   Wikipedia

• biosphere — biospheric /buy euh sfer ik/, adj. /buy euh sfear /, n. 1. the part of the earth s crust, waters, and atmosphere that supports life. 2. the ecosystem comprising the entire earth and the living organisms that inhabit it. [1895 1900; < G Biosphäre; …   Universalium

• Ecosystem ecology — Figure 1. A riparian forest in the White Mountains, New Hampshire (USA). Ecosystem ecology is the integrated study of biotic and abiotic components of ecosystems and their interactions within an ecosystem framework. This science examines how… …   Wikipedia

• marine ecosystem — Introduction       complex of living organisms in the ocean environment.       Marine waters cover two thirds of the surface of the Earth. In some places the ocean is deeper than Mount Everest is high; for example, the Mariana Trench and the… …   Universalium