Bio 201 F09 Lowry lect 37 (L37) succession

Bio 201 F09 Lowry lect 37 (L37) succession - Fact of the...

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1 http://www.livescience.com/environment/050603_lakes_gone.html 125 Large Northern Lakes Noted to have Disappeared Fact of the day Aquatic Communities Marine habitats Most extensive, uniform environment Marine habitats are found over ¾ of Earth Aquatic Communities Marine Communities (2 subjective ways to classify) Communities by oceanic region Neritic zone: shallow regions over the continental shelves Oceanic or pelagic zone: open ocean, which may reach great depths Benthic zone: sea floor Communities by depth Photic zone: where light penetrates. Phytoplankton, zooplankton and most fish live here Aphotic zone: dark, virtually no plant production invertebrates and luminescent fish Intertidal zone Alternatively exposed and submerged by the daily cycle of tides Combination of causes From Neritic zone and Photic zone yields high productivity in areas of Upwelling Mixing of the oceans Vertical movement driven by density diff. – 1) temp 2) salinity
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2 Vertical movement driven by density diff. – 1) temp 2) salinity Abyssal Circulation Evaporation drives changes in salinity Aquatic Communities Freshwater standing-water = lentic habitats running-water = lotic habitats Aquatic Communities Freshwater running-water = lotic habitats Colder, higher in oxygen content Constant motion of water results in organisms with special adaptations Aquatic Communities
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This note was uploaded on 03/22/2010 for the course BIO 200 taught by Professor Stone during the Spring '10 term at SUNY Stony Brook.

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Bio 201 F09 Lowry lect 37 (L37) succession - Fact of the...

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