euphotic

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“
The Secchi disk depth is a noticable guide to the euphotic depth that marks the lower bounds of the layer in which net photosynthetic production is possible and where the growth of water plants becomes limited by lack of light.

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Definitions (1)

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  1. adjective Of, relating to, or being the uppermost layer of a body of water that receives sufficient light for photosynthesis and the growth of green plants.

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Examples (6)

  • The Secchi disk depth is a noticable guide to the euphotic depth that marks the lower bounds of the layer in which net photosynthetic production is possible and where the growth of water plants becomes limited by lack of light. —  Featured Articles - Encyclopedia of Earth
  • It is estimated, that euphotic depth corresponds with about 1\% of full daylight. —  Featured Articles - Encyclopedia of Earth
  • Euphotic depth is usually supposed to approximate to 2. 0-2.5 meters (m) × Secchi disk depth, in the very clear oligortophic lakes, the euphotic zone may extended to 30-50 m depth. —  Featured Articles - Encyclopedia of Earth
  • Oceans  Shallow ocean waters (euphotic zone) contain a greater concentration of organisms than the rest of the sea  Phytoplankton (algae) is food not only for zooplankton (protozoans and microscopic animals) but also for small fishes  Coral reefs - areas of biological abundance just below the surface in shallow, warm, tropical waters  Chief constituents are stony corals, animals that have a calcium carbonate (limestone) exoskeleton, and calcareous red and green algae  Most of the ocean lies within the pelagic zone  Epipelagic zone lacks the inorganic nutrients of shallow waters, and therefore it does not have as high a concentration of phytoplankton  Animals in the deeper waters of the mesopelagic zone are carnivores, which are adapted to the absence of light,  Waters of the bathypelagic zone are in complete darkness except for an occasional flash of bioluminescent light  Abyssal plain - many invertebrates survive there by feeding on debris floating down from the mesopelagic zone —  Recently Uploaded Slideshows
  • More recent work in Germany (2005) suggests that any biomass carbon in the oceans, whether exported to depth or recycled in the euphotic zone, represents long-term storage of carbon. —  Citizendium, the Citizens' Compendium - Recent changes [en]
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