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net primary productivity

См. также в других словарях:

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

  • 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

  • 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

  • NPP — • Net Primary Productivity • Nuclear Power Plant (AKW bzw. KKW) …   Acronyms

  • 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

  • temperate forest — ▪ ecology Introduction  vegetation type with a more or less continuous canopy of broad leaved trees. Such forests occur between approximately 25° and 50° latitude in both hemispheres (seeFigure 1 >). Toward the polar regions they grade into… …   Universalium

  • tropical rainforest — Introduction also spelled  tropical rain forest        luxuriant forest, generally composed of broad leaved trees and found in wet tropical uplands and lowlands around the Equator.  Rainforests are vegetation types dominated by broad leaved trees …   Universalium

  • Human impacts on the nitrogen cycle — Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation (Galloway 2003). As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over… …   Wikipedia

  • Climate change feedback — See also: Avoiding dangerous climate change, Runaway climate change, and Abrupt climate change Climate change feedback is important in the understanding of global warming because feedback processes may amplify or diminish the effect of each… …   Wikipedia


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