euphotic


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Related to euphotic: photic, Photic zone

euphotic

[yü′fäd·ik]
(oceanography)
Of or constituting the upper levels of the marine environment down to the limits of effective light penetration for photosynthesis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
This summit has an extensive platform to the east, whose depths reach the euphotic layer (not shown).
During the period when resting cells were found in the Piraque Channel, the water temperature was 28.4 [degrees]C from the surface to bottom, and the data for the Secchi disk and euphotic zone indicated availability of light at the bottom of the channel.
The R1 surface expression at 50 m deep suggests that the interaction between the eddy and topography may favor the ascent of the nutricline within the euphotic layer and may also inject the nutrients needed to promote an increase in phytoplankton population.
The euphotic depth of the reservoirs was reduced during the entire sampling period, resulting in the nonexistence of seasonal variation in water transparency (P > 0.05).
The extension of the euphotic zone was variable, light penetrating to the bottom in most dates in A and B, but only in August and October in C.
The extent of the euphotic zone was calculated by multiplying the Secchi disk readings by 3.0 (Esteves, 1998).