Adjective
euphotic (not comparable)
Describing that part of the near-surface ocean in which photosynthesis is possible
Bacteria are able to convert ammonia to nitrite and nitrate but they are inhibited by light so this must occur below the euphotic zone. citation Ammonification or Mineralization is performed by bacteria to convert organic nitrogen to ammonia. Source: Internet
Areas of upwelling provide supplies of nitrogen from below the euphotic zone. Source: Internet
It extends from the surface down to a depth where light intensity falls to one percent of that at the surface, called the euphotic depth. Source: Internet
New vs. regenerated nitrogen Nitrogen entering the euphotic zone is referred to as new nitrogen because it is newly arrived from outside the productive layer. Source: Internet
Nitrogen sources are removed from the euphotic zone by the downward movement of the organic matter. Source: Internet
The new nitrogen can come from below the euphotic zone or from outside sources. Source: Internet