NPP=GPP-R_autotroph
This is the producer biomass production available for:
- growth
- reproduction
- consumers
- detrital pathways
Operational definition
Ecosystem rate.
The rate at which primary producers accumulate new organic matter after subtracting their own respiration from gross primary production:
NPP=GPP-R_A
NPP is production over time, not standing biomass. It represents organic matter potentially available for producer growth, reproduction, herbivory, symbiotic transfer, and detrital pathways.