aphotic


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aphotic

/aphot·ic/ (a-fot´ik) without light; totally dark.

aphotic

characterized by, or growing in, the absence of light.
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7 % of the total biomass) and X2 dominated in the aphotic zone (84.
bottoms in aphotic Vegetation missing, mussels occur zone with no particular but coverage <10%.
Second, because aquatic species from transparent groups that are found at aphotic depths tend to be strongly pigmented (usually red, orange, or black) (Hardy, 1956; Herring and Roe, 1988), only terrestrial taxa and aquatic taxa at euphotic and dysphotic depths are considered.
The level just below the limit at which light is sufficient for photosynthesis is especially important because it separates an upper photic region from a lower aphotic layer, the latter with very little or no light.
This observation is analogous to the relationship between the photic and aphotic zones in the open ocean; however, there are significant differences between coastal systems and the open ocean.
Future research on the effects of aphotic conditions on development and alterations of morphology and biochemistry may aid in our understanding of the evolution of troglobitic organisms.
In other words, the reduction in optic structures occurs as a correlated response to selection for elaboration of extraoptic sensors in an aphotic environment (see Fong 1985).
Gallo has many brands at all price points that continue to do well in the drug channel, including Aphotic and Edna Valley in the premium market; Barefoot, Barefoot Refresh and Gallo Family Vineyards in the popular business; Carlo Rossi and Liberty Creek in the value segment; and New Amsterdam Vodka and Shellback Rum in the spirits category.
A vertical division of the ocean would divide it into an upper illuminated (photic zone) and a lower dark aphotic zone.
In oplophorid shrimps, sensitivity to polarized light may be present in animals from the upper mesopelagic zone, but absent in those active under aphotic conditions (Gaten et al, 1992).
polar areas, new volcanic zones, some barren deserts and islands), marine aphotic zones, central oceanic gyres, and phytotelmata (see references in Polls et al.