aphotic zone


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aphotic zone

the zone of an ocean or sea into which light does not penetrate and in which, therefore, photosynthesis cannot take place. It is usually below about 100 m. See also SEA ZONATION.
References in periodicals archive ?
The 36 % reduction in P agardhii biomass in the aphotic zone at PC (October 2007) favored increases in coccoid cyanobacteria biomass in the functional groups M and K.
Aphotic zone carbonate production on a Miocene ramp Central Apennines, Italy.
Luv U Mate also talked about the aphotic zone, the point where sunlight loses its power of transference through the water as summarized by Cameron.