Definitions for "Primary productivity"
The amount of organic material produced by organisms from inorganic material. Most of the primary production in the oceans is due to photosynthesis of phytoplanktonic algae. in the upper 100 m, i.e. the euphotic zone. See Fogg (1975).
See gross primary production and net primary production.
the rate at which plants produce organic matter through photosynthesis, generally expressed as net (all increase minus all decay)