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aphotic zone

The Columbia Encyclopedia, Sixth Edition | 2008 | Copyright

aphotic zone see ocean .

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"aphotic zone." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 10 Feb. 2010 <http://www.encyclopedia.com>.

"aphotic zone." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (February 10, 2010). http://www.encyclopedia.com/doc/1E1-X-aphoticz.html

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	Earth: a watery planet: water covers 70 percent of our planet. And 97 percent... Magazine article from: Science World April 8, 2002 700+ words ...000 m Also called the twilight zone, extremely dim (656 to 3,281...more abundant food supply in the zone above. Some residents include the...octopus, and shrimp. Bathypelagic (Aphotic) Zone 1,000 to 4,000 m No light penetrates...
	Sea students who excel: High schoolers from across the nation vie for dream... Newspaper article from: Newsday (Melville, NY) April 30, 2007 700+ words ...there is not enough sunlight for the rate of photosynthesis to exceed respiration is called the A) photic zone B) neritic zone C) aphotic zone D) euphotic zone Answer: C Q: What body of water is the northward extension of the Indian Ocean, between...
	MINIMUM HYPE: In Rehoboth; Cosmic Relief Newspaper article from: The Washington Post Linton Weeks January 2, 2000 700+ words ...light at all and temperatures are near freezing. The midnight zone, called the aphotic zone by oceanographers, makes up 90 percent of the ocean. It...we see any light at all in this vast, outlandish midnight zone called modern life.
	A noteworthy infection of Clinostomum complanatum (Digenea: Clinostomidae) in a... Magazine article from: The Texas Journal of Science McAllister, Chris T. Bursey, Charles R. Niemiller, Matthew L. Miller, Brian T. November 1, 2007 700+ words ...Conant & Collins 1998). It prefers the twilight zone of caves and occasionally is found near springs and seepage...lucifuga (SVL = 62 mm) was collected by hand from the aphotic zone of Flat Rock Cave (Tennessee Cave Survey Number SM66...
	Study results from V.V.S.S. Sarma and colleagues update understanding of... Newspaper article from: Ecology, Environment & Conservation November 14, 2008 700+ words ...Sarma and colleagues. The researchers concluded: "Based on floating-sediment-trap data, export production to the aphotic zone was about 12-20% of the GPP; the rest accumulated as dissolved organic carbon (DOC) or was respired." Sarma...
	Studies from University of Hawaii yield new information about environmental... Newspaper article from: Ecology, Environment & Conservation October 9, 2009 700+ words ...On average, a higher proportion of SAR11 rRNA gene copies were detected in the photic zone (< 175 m depth; mean = 38%) compared with aphotic (> 175 m depth; mean = 30%), and in the winter months compared with the summer...
	Annual cycle and interannual variability of ecosystem metabolism in a temperate... Magazine article from: Ecological Monographs Smith, S.V. Hollibaugh, J.T. November 1, 1997 700+ words ...NEP of the upper ocean (the photic zone) is positive; this region exports organic material to the deep (aphotic) ocean (NEP [is less than] 0). The...released and mixed back into the photic zone to support positive NEP. The concept...
	The distribution and abundance of coyotes: the effects of allochthonous food... Magazine article from: Ecology Rose, Michael D. Polis, Gary A. April 1, 1998 700+ words ...some barren deserts and islands), marine aphotic zones, central oceanic gyres, and phytotelmata...ocean-land interface. In this coastal zone, aquatic and terrestrial habitats interact...an emphasis on the islands and coastal zone of Baja California, Mexico. In this area...

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Related entries from encyclopedias, dictionaries, and thesauruses

	aphotic zone Book article from: A Dictionary of Biology aphotic zone ( bathypelagic zone ) The region of a lake or sea where no light penetrates; it is situated beneath the euphotic zone . The aphotic zone contains no algae or phytoplankton, and its inhabitants are exclusively...
	euphotic zone Book article from: A Dictionary of Plant Sciences ...compensation level and therefore the zone of effective photosynthesis. In...is much thinner than the deeper aphotic zone , typically reaching 30 m in coastal...edge) and limnetic zones . Compare APHOTIC ZONE ; DYSPHOTIC ZONE ; PHOTIC ZONE...
	bathypelagic zone Book article from: A Dictionary of Biology bathypelagic zone See aphotic zone .
	disphotic zone Book article from: A Dictionary of Plant Sciences disphotic zone See APHOTIC ZONE .
	abyssal zone Book article from: A Dictionary of Biology abyssal zone The lower depths of the ocean (below approximately 2000 metres), where there is effectively no light penetration. Abyssal organisms are adapted for living under high pressures in cold dark conditions. See also aphotic zone .