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Topic: Aphotic zone

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Pelagic zone

	Aphotic zone
		The aphotic zone is the depth of the ocean that is not exposed to sunlight.
		The depth of the aphotic zone can be greatly affected by such things as turbidity and the season of the year.
		The aphotic zone generally underlies the photic zone, which is that portion of the ocean directly affected by sunlight.
	www.ebroadcast.com.au /lookup/encyclopedia/ap/Aphotic_zone.html (55 words)

	Ocean Water: Optics
		The first zone, or euphotic zone, extends from the water's surface to about 50 meters depth, depending on the time of year, the time of day, the clarity (clearness) of the water and the presence of clouds.
		The next zone is the dysphotic zone, which extends from about 50 meters, or wherever the euphotic zone ends, to about 1,000 meters.
		In this zone, there is enough light for organisms to see, but it is too weak for photosynthesis to happen.
	www.onr.navy.mil /focus/ocean/water/optics1.htm (296 words)

	Ocean - The real meaning from Timesharetalk wikipedia (Site not responding. Last check: 2007-10-16)
		Lastly, the hadal zone corresponds to the hadalpelagic zone which is found in the oceanic trenches.
		In contrast, the littoral zone covers the region between low and high tide and represents the transitional area between marine and terrestrial conditions.
		It is also known as the intertidal zone because it is the area where tide level affects the conditions of the region.
	www.timesharetalk.co.uk /wiki.asp?k=Ocean (1750 words)

	Dummies::SAT II Biology: Touring the Major Biomes
		Neritic zone: The continental shelf extends out pretty far before dropping off to the really deep ocean — that part after the beach but before the drop-off is called the neritic zone.
		Aphotic means "no light," so the aphotic zone is where light does not penetrate, which is in the deepest part of the ocean.
		That means (B), the aphotic zone, is the correct answer.
	www.dummies.com /WileyCDA/DummiesArticle/id-3026.html (1398 words)

	Photic zone - Enpsychlopedia
		The photic zone is the depth of the water, whether in a lake or an ocean, that is exposed to sufficient sunlight for photosynthesis to occur.
		Since the photic zone is the only zone of water where primary productivity occurs, an exception being the productivity connected with abyssal hydrothermal vents along mid-oceanic ridges, the depth of the photic zone is generally proportional to the level of primary productivity that occurs in that area of the ocean.
		The transparency of water, which affects the photic zone, is simply measured with a Secchi disk.
	enpsychlopedia.org /psypsych/Photic_zone (195 words)

	Nature Works- Ocean Zones (Site not responding. Last check: 2007-10-16)
		This is the ocean zone that sunlight penetrates.
		The last zone is the aphotic or midnight zone.
		Animals that live in the twilight zone must be able to survive cold temperatures, an increase in water pressure and dark waters.
	www.nhptv.org /natureworks/nwep6c.htm (529 words)

	Freshwater Ecology
		Now calculate the total daily NPP of the aphotic zone using the average daytime NPP (use average 3-10 meters) plus the nighttime respiration value for the 10 meter depth.
		Convert the NPP values from oxygen units to carbon for the photic and aphotic zones by multiplying by 0.375 and then dividing by the quotient 1.2.
		For this question, refer to your hypsographic curve and calculate the volume of the lake that is between 0-2 meters and between 3-21 meters (you can take half of your 6 meter value, since that is the resolution of the data).
	serc.fiu.edu /periphyton/Limnology/Lab5Oxygen.htm (410 words)

	Quia - AP Bio: An Introduction to Ecology and the Biosphere--Ch. 50 Terms
		The part of the ocean beneath the photic zone, where light does not penetrate sufficiently for photosynthesis to occur.
		The communites of organisms living in the benthic zone of an aquatic biome.
		The application of ecological principles to the study of land-use patterns; the scientific study of the biodiversity of interacting ecosystems.
	www.quia.com /jg/346429list.html (621 words)

	aquaticbiomes (Site not responding. Last check: 2007-10-16)
		The pelagic zone, or "open ocean," is characterized by communities of highly motile animals, such as fish, squids, and marine mammals.
		The seafloor and the communities inhabiting it are referred to as the benthic zone.
		Organisms in the intertidal must adapt to periods of being covered by salt water and periods of being exposed to air, according to the ebb and flow of the tides.
	facstaff.uww.edu /wentzl/aquaticbiomes.html (186 words)

	Marine Biome
		These bodies of water are further divided into the photic and aphotic zones.
		Photic zones are portions of the marine biome that are shallow enough for sunlight to penetrate.
		Aphotic zones are the deeper waters that sunlight cannot reach.
	www.parisisd.net /parishigh/web_of_life/marine_biome.htm (426 words)

	Ecol-3 (Site not responding. Last check: 2007-10-16)
		All parts of the intertidal zone, all parts of the neritic zone and the upper part of the oceanic zone get sunlight and are therefore part of the photic zone.
		In the neritic and oceanic zones, the bottom is called the benthic zone while the water itself is called the pelagic zone.
		The oceanic zone is farther from land so there are fewer nutrients and large parts of it are aphotic.
	www.haverhill-ma.com /hhs/willets/ecol-3.html (412 words)

	Marine Discovery Lesson
		The ocean is divided into six zones to separate regions of the ocean and to make it easier to define organisms by the different regions they live in.
		This zone is surrounded by wetlands, salt marshes and mangrove swamps.
		For instance, draw a picture on the board of where the zones are and have them think about and discuss as a class what areas have not been talked about.
	marinediscovery.arizona.edu /lessons/brittle_stars/Templates/index.html (3409 words)

	New Page 1
		The benthic zone is an area at or near the bottom.
		The pelagic zone is the open water area of the ocean.
		Euphotic zone is the area at the surface of the ocean (less than 200 feet in most places) that has enough light to support photosynthesis.The Aphotic Zone is the area of the deep ocean which sunlight never penetrates.
	www.ibiblio.org /virtualcell/amazingbiology/oceanography/light.htm (479 words)

	Ocean Habitat
		Each level in the Pelagic Zone is based on colors of the animals in that zone.
		Photic-Designating or relating to the layer of a body of water that is penetrated by sufficient sunlight for photosynthesis.
		Aphotic-Of or relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur.
	web2k.wsfcs.k12.nc.us /JEFFMS/schnably/3/5/ocean_habitat.htm (288 words)

	Encyclopedia :: encyclopedia : Aphotic zone (Site not responding. Last check: 2007-10-16)
		Organisms in the aphotic zone directly or indirectly depend on smaller producers, such as plankton, from the photic zone.
		Law on the Territorial Sea and the Contiguous Zone of the Republic of China (Source)
		Law on the Exclusive Economic Zone and the Continental Shelf of the Republic of China (Source)
	www.hallencyclopedia.com /topic/Aphotic_zone.html (134 words)

	Photic zone - Wikipedia, the free encyclopedia (via CobWeb/3.1 planet2.scs.cs.nyu.edu) (Site not responding. Last check: 2007-10-16)
		The Euphotic zone is the depth of the water, whether in a lake or an ocean, that is exposed to sufficient sunlight for photosynthesis to occur.
		Since the Euphotic zone is the only zone of water where primary productivity occurs, an exception being the productivity connected with abyssal hydrothermal vents along mid-oceanic ridges, the depth of the photic zone is generally proportional to the level of primary productivity that occurs in that area of the ocean.
		The transparency of water, which affects the Euphotic zone, is simply measured with a Secchi disk.
	en.wikipedia.org.cob-web.org:8888 /wiki/Photic_zone (205 words)

	Aphotic Zone (Site not responding. Last check: 2007-10-16)
		The bathypelagic, abyssopelagic, and hadopelagic zones are very similar in character, and some marine biologists elide them into aThere are two main layers in all oceans: the Audi Canada photic zone and the aphotic zone.
		The photic zone is the top layer in all oceans.
		Aphotic zoneThe last zone is the aphotic or midnight zone.
	aphotic.nm12.com /aphotic-zone.htm (177 words)

	The World’s Oceans
		Euphotic Zone is the level of water in which there is sufficient light for photosynthesis.
		Phytoplankton are tiny organisms that use photosynthesis to make their own food.
		Dyphotic Zone is below the euphotic level in which light reaches, but is not adequate for photosynthesis to occur
	keep3.sjfc.edu /students/rlb3287/e-port/MSTE2/Ocean_files/slide0006.htm (154 words)

	Aquatic biomes occupy the largest part of the biosphere
		plankton live in the photic zone and are the producers for this biome.
		We would expect production to increase along a gradient from the poles to the equator; but that is not the case.
		In the open ocean, nitrogen and phosphorous levels are very low in the photic zone, but high in deeper water where light does not penetrate.
	mason.gmu.edu /~klargen/110lectaquaticbiomesfall02.htm (530 words)

	Biology (Site not responding. Last check: 2007-10-16)
		The aphotic zone is the part of the ocean underneath of the photic zone where light does not penetrate.
		The photic zone is the area above the aphotic zone which consists of light penetrating through the water so that photosynthesis can take place.
		A population is the number of a particular species in a given area.
	www.msu.edu /~browerst/ChEighteenVoc.html (233 words)

	Chap12 (Site not responding. Last check: 2007-10-16)
		(1) serve as decomposers are symbiotes with algae to form lichens in intertidal zones
		supralittoral zone (spray zone)--transitional region from land to sea floor above the spring high-tide line
		inner sublittoral zone--sublittoral zone to a depth of around 50 meters (determined by depth at which no marine algae is found growing)
	www.pierce.ctc.edu /rmay/OCEAN101/Chap12.htm (1181 words)

	AllRefer.com - aphotic zone (Geology And Oceanography) - Encyclopedia
		AllRefer.com - aphotic zone (Geology And Oceanography) - Encyclopedia
		You are here : AllRefer.com > Reference > Encyclopedia > Geology And Oceanography > aphotic zone
		More articles from AllRefer Reference on aphotic zone
	reference.allrefer.com /encyclopedia/X/X-aphoticz.html (121 words)

	A.Word.A.Day -- aphotic
		The aphotic zone of an ocean or lake is the part that's not exposed to sunlight.
		"In fact, Larry's craven musings and jaundiced view of the world is so aphotic, Jerry, George, Elaine and Kramer seem like cheery philanthropists." Vinay Menon; Think Seinfeld Only Darker; The Toronto Star (Canada); Feb 12, 2003.
		Sign up to receive A.Word.A.Day in your mailbox every day.
	wordsmith.org /words/aphotic.html (209 words)

	Ecoques-3 (Site not responding. Last check: 2007-10-16)
		1)The biggest problem facing organisms living in the intertidal zone is that for part of the time they are __________________________________
		4) The two things algae need to grow are a) ___________________ which is found near the top of all the zones and b) _____________________ which are found more in water near land.
		A) eutrophic B) neritic zone C) estuary D) benthic zone E) oligotrophic F) intertidal zone G) pelagic
	www.haverhill-ma.com /hhs/willets/ecoques-3.html (226 words)

	Untitled Document (Site not responding. Last check: 2007-10-16)
		If question 1 on the multiple choice part of the exam was:
		The benthic zone of the ocean is largely unexplored because of difficulties associated with working under conditions of extreme pressure.
		There are communities of unusual organisms found on the benthos of the ocean adjacent to:
	www.fiu.edu /~donnelly/exam1menu.htm (230 words)

	Ocean Habitat
		; only blue light seen here "twilight zone"
		Weak swimmers mainly; fins modified as sensory organs in some.
		BENTHIC ZONE: (life in or on the sand)
	web2k.wsfcs.k12.nc.us /JEFFMS/schnably/6/4/ocean_habitat.htm (159 words)

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