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A Limnologic Perspective
The Aquatic Ecosystem
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acid activity algae America amount animals annual appear aquatic associated atmosphere bacteria basin become beneath body bottom carbon cells changes compared concentration contains curve deep density depth described discussed dissolved ecosystem effects energy eutrophic example factors Figure fish flow forms freshwater greater green habitats heat important increase inland known lakes larvae later layer least less light living lower marine mass material mean meter method natural North nutrients occur organic origin oxygen perhaps period photosynthesis plankton plants Pleistocene ponds populations present primary production ratio reduced regions relatively represented result river saline sample sediments serve shallow species spring stream studies summer surface Table temperature termed Textbook of Limnology tion typical unit upper usually various vertical volume waves wind winter zone