the permanently dark aphotic zone includes the deepest parts of the ocean. foodwebs here are based either on organism that fall from the photic zone above, or on chemosynthetic organisms. deep ocean organisms, like the fish are exposed to high pressure, frigid temperatures, and total darkness. benthic environments in the deep sea were once thought to be nearly devoid of life but are now known to have islands of high productivity. deep-sea vents,where superheated water boils out of cracks on the ocean floor, support chemmosynthetic primary producers.
the permanently dark aphotic zone includes the deepest parts of the ocean. foodwebs here are based either on organism that fall from the photic zone above, or on chemosynthetic organisms. deep ocean organisms, like the fish are exposed to high pressure, frigid temperatures, and total darkness. benthic environments in the deep sea were once thought to be nearly devoid of life but are now known to have islands of high productivity. deep-sea vents,where superheated water boils out of cracks on the ocean floor, support chemmosynthetic primary producers.
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