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Biology

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Biology

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Ecosystems

GPP, NPP, and Ecosystem Energy

Description

Gross primary production and net primary production describe how energy enters and moves through ecosystems. Primary producers, or autotrophs, make their own food. They can do this by photosynthesis or chemosynthesis, and they can also gain energy by consuming other organisms. The rate at which producers capture and store th...

Transcript

- [Instructeur] La productivité primaire désigne le tauxauquel les autotrophes convertissent le dioxyde de carboneen matières organiques lors de la photosynthèse. Et la production primaire totale au sein d'un écosystèmeest la production primaire brute, ou PPB. Cependant, les autotrophes utilisent aussi leur énergiependant la respiration cellul...

Tags

Production primaire bruteProduction primaire nettePhotosynth seChimiosynth seProductivit des cosyst mesP n tration de la lumi reDisponibilit des nutrimentsEutrophisationPhytoplancton

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