aphotic zone


aphotic zone
That zone of ocean water that lies below 800 meters and which receives little or no light.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • Aphotic zone — The aphotic zone (aphotic from Greek prefix polytonic|ἀ + polytonic|φῶς without light ) is the portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1% of sunlight penetrates …   Wikipedia

  • aphotic zone — afotinė zona statusas T sritis ekologija ir aplinkotyra apibrėžtis Neapšviestas vandens sluoksnis, kuriame negalima efektyvi fotosintezė. atitikmenys: angl. aphotic zone vok. aphotische Tiefenstufe, f rus. афотическая зона, f; лишенная света зона …   Ekologijos terminų aiškinamasis žodynas

  • aphotic zone — noun that part of the deep body of an ocean or lake that receives insufficient sunlight for photosynthesis to be possible …   Wiktionary

  • aphotic — (adj.) untouched by sunlight, lightless (in reference to deep sea regions), 1903, Modern Latin, from Gk. a not, without (see A (Cf. a ) (3)) + phos (gen. photos) light, related to phainein to show, to bring to light (see PHANTASM (Cf. phantasm))… …   Etymology dictionary

  • aphotic — [ā fōt′ik] adj. [ A 2 + PHOTIC] without light; specif., pertaining to that part (aphotic zone) of the ocean below a depth of c. 100 m ( c. 328 ft) which does not receive sufficient sunlight for photosynthesis: see EUPHOTIC …   English World dictionary

  • aphotic — adjective Date: circa 1900 being the deep zone of an ocean or lake receiving too little light to permit photosynthesis …   New Collegiate Dictionary

  • Benthic zone — The benthic zone is the ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and some sub surface layers. Organisms living in this zone are called benthos. They generally live in… …   Wikipedia

  • Oceanic zone — Marine habitats The oceanic zone is the deep open ocean water that lies off the continental slopes Littoral zone Intertidal zone …   Wikipedia

  • Profundal zone — The profundal zone is a deep zone of a body of water, such as an ocean or a lake, located below the range of effective light penetration. This is typically below the thermocline, the vertical zone in the water through which temperature drops… …   Wikipedia

  • photic zone — Biol. the upper layer of a body of water delineated by the depth to which enough sunlight can penetrate to permit photosynthesis. [1970 75] * * * ▪ oceanography       surface layer of the ocean that receives sunlight. The uppermost 80 m (260… …   Universalium


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