euphotic zone


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Related to euphotic zone: photic, upwelling

euphotic zone:

see oceanocean,
interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated from each other in most cases by the continental masses. See also oceanography.
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References in periodicals archive ?
pH and DO in the vertical profiles were highest in the euphotic zone, while alkalinity, SRP, and DIN were highest in the aphotic zone (Table 2).
These include diverse microborings attributable to green algae and cyanobacteria; these photoautotrophs indicate a relatively strong light source, suggestive of shallow euphotic zone III (e.
Despite the low rate of nitrogen fixation, plankton communities are maintained in the euphotic zone (Von Dassow & Collado-Fabbri, 2014).
In thermally stratified lakes nutrient concentrations in the water column tend to decrease because thermocline acts as a barrier to water column mixing and prevents transport of nutrients into the euphotic zone (Welch & Cooke 1995).
The upwelling of nutrients into the euphotic zone (the top 330 feet or 100 meters of the ocean, where light penetrates) would stimulate prodigious blooms of phytoplankton, which attract zooplankton and other animals up the food chain.
The concept of the euphotic zone is widely used in marine biology and marine optics, being generally applied to the water layer where photosynthesis takes place (Chekhin 1987; Morel & Berthon 1989; Adamenko et al.
For example, for a given light gradient it is possible to indicate the depth of the euphotic zone, where most photosynthesis takes place (cf.
All species lack symbiotic algae in their tissues (ahermatypic) and most are found in deep water below the euphotic zone (Table 4).
Monitoring referred to in section 1 includes physicochemical analysis of waters in the following areas: a) dissolved oxygen, b) average hypolimnion oxygen saturation, c) pH, d) specific conductivity, e) chlorophyll, f) general nitrogen I) BOD5, j) CHZTCr, k) general hardness, l) characteristics of the range and conditions of propagation (dissipation) of photosynthetic active radiation (PAR) in the water column, m) actual range of the euphotic zone , N) light attenuation coefficient for the euphotic zone.