Matter may be gained by, or lost from, ecosystems. Matter can move from one Matter can move from one ecosystem to another
The entire amount of carbon in an ecosystem that can be exported, stored, or converted back into carbon dioxide gas is known as ecosystem production. For example, grams of carbon per square meter per year, is how the NEP is expressed in terms of carbon mass per unit area per time.
When measured as net ecosystem production, carbon in a given ecosystem can ultimately be exported as organic carbon to another system, oxidized by fire or UV light, accumulated as biomass, or accumulated in sediments or soils. Carbon that is classed as NEP can take the form of dissolved materials that have not yet broken down in the ocean, such as phytoplankton cells, detritus, or particles in the particulate organic carbon (POC) pool.
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