biomass


biomass
/buy"oh mas'/, n.
1. Ecol. the amount of living matter in a given habitat, expressed either as the weight of organisms per unit area or as the volume of organisms per unit volume of habitat.
2. Energy. organic matter, esp. plant matter, that can be converted to fuel and is therefore regarded as a potential energy source.
[1930-35; BIO- + MASS]

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Weight or total quantity of living organisms of one animal or plant species (species biomass) or of all the species in the community (community biomass), commonly referred to as a unit area or volume of the habitat.

The biomass in an area at a given moment is the standing crop.

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      the weight or total quantity of living organisms of one animal or plant species (species biomass) or of all the species in the community (community biomass), commonly referred to a unit area or volume of habitat. The weight or quantity of organisms in an area at a given moment is the standing crop. The total amount of organic material produced by living organisms of a particular area within a set period of time, called the primary or secondary productivity (the former for plants, the latter for animals), is usually measured in units of energy, such as gram calories or kilojoules per square metre per year. Measures of weight—e.g., tons of carbon per square kilometre per year—are also commonly recorded.

      In a different though related sense, the term biomass refers to plant materials and animal waste used especially as a source of fuel.

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Universalium. 2010.

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