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United States Environmental Protection Agency
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Search Results for the EPA National Library Catalog
Items Found: 449
Showing: Items 401 - 449
Your Search: (SUBJECT=Biological productivity)
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Structure and Function of Copper-Stressed Aquatic Microcosms.
Studies of circulation and primary production in deep inlet environments /
Studies on lake restoration by phosphorus inactivation /
Study of Phytoplankton Dynamics in Lake Fayetteville as a Means of Assessing Water Quality.
Summary analysis of the North American (US portion) OECD eutrophication project : nutrient loading--lake response relationships and trophic state indices /
Summer Internal Phosphorus Supplies in Shagawa Lake, Minnesota.
Survey of Lake Rehabilitation Techniques and Experiences.
Swan Lake, Columbia County, Wisconsin.
Swan Lake, Itasca County, Minnesota.
Swan Lake, Sullivan County, New York.
Systems Simulation of the Effects of Tertiary Treatment for Carbon, Nitrogen, and Phosphorus Removal Upon Primary Productivity, Standing Crop and Community Structure of Autotrophic and Metertrophic Communities in Receiv ing Model Streams.
Tainter Lake, Dunn County, Wisconsin.
Technical Analysis of Response of Chesapeake Bay Water Quality Model to Loading Scenarios (A Report of the Modeling Subcommittee Chesapeake Bay Program Office, Annapolis, MD).
The dynamics of an estuary as a natural ecosystem /
The Dynamics of an estuary as a natural ecosystem, II /
The production ecology of wetlands : the IBP synthesis /
The role of trace elements in management of nuisance growths,
The Selenastrum capricornutum printz algal assay bottle test : experimental design, application, and data interpretation protocol /
The Trophic cascade in lakes /
Thermal Effects on Biological Production in a Pond.
Towline Lake, Oneida County, Wisconsin.
Trace element research using coniferous forest soil/litter microcosms /
Trace Lake, Todd County, Minnesota.
Trout Lake, Itasca County, Minnesota.
Trout Lake, Vilas County, Wisconsin.
Tundra biome : proceedings /
Turner Reservoir and Central Pond, Providence County, Rhode Island, and Bristol County, Massachusetts.
Wagonga Lake, Kandiyohi County, Minnesota.
Wallmark (Mud) Lake, Chisago County, Minnesota.
Wapogasset Lake, Polk County, Wisconsin.
Wastewater treatment by natural and artificial marshes /
Water Pollution Investigation: Detroit and St. Clair Rivers.
Water Pollution Investigation: Genesee River and Rochester Area.
Water Quality in Agricultural Watersheds: Impact of Riparian Vegetation during Base Flow.
Water Resources Research in Virginia. 1969-1971.
Waterbury Reservoir Washington and Lamoille Counties Vermont.
Waterford Inpoundment-Tichigan Lake, Racine County, Wisconsin.
Watershed and point source enrichment and lake trophic state index /
Weed Harvest and Lake Nutrient Dynamics.
Weiser-Lower Payette water quality surveys ... August 1975 and December 1975
What are the Effects of UV-B Radiation on Marine Organisms.
What controls phytoplankton production in nutrient-rich areas of the open sea? /
White Bear Lake, Ramsey and Washington Counties, Minnesota.
Willow Reservoir, Oneida County, Wisconsin.
Winter Field Use of CO2 Freezing to Obtain Core Samples of Stream Sediments.
Wolf Lake, Beltrami and Hubbard Counties, Minnesota.
Yellow Lake, Burnett County, Wisconsin.
Zooplankton grazing and population dynamics relative to water quality in southern Lake Huron /
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