Nutrient enrichment and eutrophication of Lake Michigan. Progress report, July 1, 1975--June 30, 1976

Technical Report · Thu Jan 01 00:00:00 EST 1976

DOI:https://doi.org/10.2172/7361437· OSTI ID:7361437

Schelske, C L; Davis, C O

Studies were conducted on relationships between phytoplankton and major nutrients. Data were collected on species composition and abundance of phytoplankton and on chlorophyll a, primary productivity, phosphorus silica, nitrate, ammonia, pH, chloride, specific conductance, water temperature, and transparency. Open lake studies confirmed a predicted shift in species composition from diatoms to blue-green algae in the epilimnetic waters and offered evidence that silica limitation is the major factor restricting diatom abundance. Studies on tributaries showed great differences in chemical parameters and phytoplankton composition in the three rivers, Grand, Kalamazoo, and St. Joseph. Cruises were conducted to study the Grand River and the Grand River plume in Lake Michigan; it was found that nutrient levels were high during high flow conditions regardless of the time of year. Chemostat studies are being conducted with diatoms. (HLW)

• Research Organization: Michigan Univ., Ann Arbor (USA). Great Lakes Research Div.
• DOE Contract Number: AT(11-1)-2003
• OSTI ID: 7361437
• Report Number(s): COO-2003-26
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALGAE
TAXONOMY
AMMONIA
MONITORING
DIATOMS
LAKE MICHIGAN
TEMPERATURE DISTRIBUTION
NITRATES
NUTRIENTS
PHOSPHORUS
PLANKTON
SILICA
CHLOROPHYLL
PH VALUE
PLUMES
RIVERS
AQUATIC ORGANISMS
BIOLOGY
BIOMASS
CARBOXYLIC ACIDS
CHALCOGENIDES
ELEMENTS
ENERGY SOURCES
GREAT LAKES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
LAKES
MINERALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYTOCHROMES
PIGMENTS
PLANTS
PORPHYRINS
RENEWABLE ENERGY SOURCES
SILICON COMPOUNDS
SILICON OXIDES
STREAMS
SURFACE WATERS
520100* - Environment
Aquatic- Basic Studies- (-1989)
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)