disphotic zone
dysphotic zone

Dictionary of ichthyology. 2009.

Look at other dictionaries:

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

  • dysphotic zone — the area in a water body without enough light for photosynthesis but enough for behavioural responses by the organisms living there (about 80 200+ metres). Also spelled disphotic …   Dictionary of ichthyology

  • Deep sea communities — giant tubeworm Deep sea communities currently remain largely unexplored, due the technological and logististical challenges and expense involved in visiting these remote biomes. Because of the unique challenges (particularly the high barometric… …   Wikipedia

  • marine ecosystem — Introduction       complex of living organisms in the ocean environment.       Marine waters cover two thirds of the surface of the Earth. In some places the ocean is deeper than Mount Everest is high; for example, the Mariana Trench and the… …   Universalium

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