Phrases with «photic zone»

The phrase "photic zone" refers to the part of the Earth's ocean or a lake where there is enough sunlight for photosynthesis to occur. It is the area where plants and algae can grow and provide food for other marine life. Full definition

Sentences with «photic zone»

  • The upper photic zone is low in nutrient concentration, high in light intensity and penetration, and usually higher in temperature. (en.wikipedia.org)
  • The lower photic zone is high in nutrient concentration, low in light intensity and penetration and relatively cool. (en.wikipedia.org)
  • This research not only provides the first clear evidence that microorganisms were directly involved in the deposition of Earth's oldest iron formations; it also indicates that large populations of oxygen - producing cyanobacteria were at work in the shallow areas of the ancient oceans, while deeper water still reached by the light (the photic zone) tended to be populated by anoxyenic or micro-aerophilic iron - oxidizing bacteria which formed the iron deposits. (sciencedaily.com)
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