What is the difference between productivity and biomass?

Productivity: Productivity is the amount of organic matter made by photosynthesizing (and/or sometimes chemosynthesizing) organisms in an ecosystem. Biomass is the mass of all living organisms in an ecosystem, or the mass of one or more species in an ecosystem, at a particular time.

What is the difference between net and primary production in an ecosystem?

Food produced by photosynthesis forms the base of most ecosystem food chains. Gross primary production (GPP) is the total rate at which material is produced and net primary production (NPP) is the rate at which material is accumulated in excess of respiration. In other words, NPP is GPP minus respiration.

How are gross primary productivity and the biomass of an ecosystem related?

…an ecosystem during photosynthesis (gross primary productivity) varies among environments. (Productivity is often measured by an increase in biomass, a term used to refer to the weight of all living organisms in an area. Biomass is reported in grams or metric tons.)

What is the relationship between NPP and average crop standing biomass?

The annual NPP shown in the figure is actually produced by a number of overlapping phytoplankton generations, while the standing crop biomass is only the average present at an instant. Ratios of NPP to biomass tend to decrease during successions.

What is the difference between primary production and primary productivity?

Summary. Primary producers, which are usually plants and other photosynthesizers, are the gateway through which energy enters food webs. Productivity is the rate at which energy is added to the bodies of a group of organisms, such as primary producers, in the form of biomass.

What is the difference between primary productivity and standing crop biomass?

Primary production is the creation of new organic matter by plants and other autotrophs. Production also is a rate, measured per time unit, while standing crop biomass is the amount of plant matter at a given point in time. The ratio of standing crop to production is called turnover.

What is the difference between primary and net productivity?

Gross primary productivity, or GPP, is the rate at which solar energy is captured in sugar molecules during photosynthesis (energy captured per unit area per unit time). Net primary productivity, or NPP, is gross primary productivity minus the rate of energy loss to metabolism and maintenance.

What is a standing biomass?

The total biomass of a given area at the present time.

What is net primary productivity or NPP?

Net primary production (NPP) is strictly defined as the difference between the energy fixed by autotrophs and their respiration, and it is most commonly equated to increments in biomass per unit of land surface and time.