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Report on the seventeenth congress
Studies on development cycle of Peridinium cinctum f westii 1013
Primary productivity studies in Lake Tahoe
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abundant activity algae amount animals appears aquatic basin biomass bottom calculated carbon cells changes chemical closed collected compared composition concentration culture decrease density depth determined Discussion dissolved distribution ecology effect experiments factors fauna fish freshwater growth higher important increase indicate lake layers leaves less light limiting Limnol limnology lower major material maximum mean measured method natural nitrogen numbers nutrient observed obtained occur organic oxygen period phosphate photosynthetic phytoplankton plankton plants population possible present primary probably productivity range ratio recent recorded References region relation relatively represented reservoir River saline samples seasonal sediments shallow shore shown similar species stations stream summer surface taken temperature upper values variation vertical weight winter zooplankton