Search Results for the EPA National Library Catalog

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Select Item Title Year Published
Patterns in freshwater fish ecology / 1998
Patuxent River Basin : environmental assessment of stream conditions / 1998
Pennak's freshwater invertebrates of the United States : Porifera to Crustacea / 2001
Pentabromodiphenyl Oxide (PeBDPO): A 96-Hour Flow-Through Acute Toxicity Test with the Rainbow Trout (Oncorhynchus Mykiss), with Cover Letter dated 10/29/1997. 1997
Periphyton communities in streams of the Ozark plateaus and their relations to selected environmental factors 2003
Periphyton of freshwater ecosystems : proceedings of the First International Workshop on Periphyton of Freshwater Ecosystems, held in V axj o, Sweden, 14-17 September 1982 / 1983
Perspectives on nonpoint source pollution : proceedings of a national conference, Kansas City, Missouri, May 19-22, 1985. 1985
Pesticide impact on stream fauna : with special reference to macroinvertebrates / 1987
Pesticides and freshwater fauna, 1971
Peterson field guide to freshwater fishes of North America north of Mexico / 2011
Pharmacological testing of blue-green algae for constituents having therapeutic value / 1970
Phosphorus cycling in a periphyton-dominated freshwater wetland / 1997
Phosphorus in freshwater ecosystems proceedings of a symposium held in Uppsala, Sweden, 25-28 Sept. 1985 / 1988
Photosynthetic pigments of Lake Superior periphyton and their relation to primary productivity, 1970
Phycoperiphyton responses to the discharge of fish hatchery effluents in two eastern Sierra Nevada streams 1976
Physical, chemical and bacteriological water quality in Gunpowder Falls and Little Gunpowder Falls : 1965 summer survey/ 1967
Physical, chemical, and biological data for selected streams in Chester County, Pennsylvania, 1969-80 1989
Physicochemical Factors Affecting Toxicity in Freshwater: Hardness, pH, and Temperature (Chapter 1). 1994
Phytoplankton and trophic gradients : proceedings of the 10th workshop of the International Association of Phytoplankton Taxonomy & Ecology (IAP), held in Granada, Spain, 21-29 June 1996 / 1998
Phytoplankton and zooplankton composition, abundance and distribution : Lake Erie, Lake Huron, and Lake Michigan - 1983 / 1987
Phytoplankton and zooplankton composition, abundance and distribution and trophic interactions : offshore region of Lakes [i.e. Lake] Erie, Lake Huron and Lake Michigan : 1985 / 1989
Phytoplankton and zooplankton in Lakes Erie, Lake Huron and Lake Michigan, 1984 / 1988
Phytoplankton dynamics in the North American Great Lakes / 1996
Phytoplankton growth and chlorophyll levels in the Sacramento-San Joaquin delta through San Pablo Bay / 1977
Phytoplankton productivity : carbon assimilation in marine and freshwater ecosystems / 2002
Pilot analysis of global ecosystems. Freshwater systems / 2000
Pilot study for Montgomery County and Maryland DNR data integration : comparison of benthic macroinvertebrate sampling protocols for freshwater streams / 2003
Pilot study to evaluate biological, physical, chemical, and land-use characteristics in Maryland coastal plain streams 1993
Pilot study to evaluate biological, physical, chemical, and land-use characteristics in Maryland coastal plain streams : year 2 / 1995
Plankton analysis : training manual / 1975
Plankton analysis : training manual. 1970
Plankton community and hydraulic characterization preliminary to lake flushing / 1969
Plankton micro-fossils as indicators of paleotrophic dynamism in Flathead Lake : completion report, project no. A-074-MONT / 1975
Planned and actual impacts on fish and water quality on {i.e. in} three national forests in northern Idaho 1987
Plant production in experimental streams : a cooperative research project with Weyerhaeuser Company / 1976
Pollution and freshwater fish 1992
Pollution ecology of freshwater invertebrates. 1974
Pond and brook a guide to nature in freshwater environments / 1990
Population, water & wildlife : finding a balance / 2002
Potential for Transfer of Polynuclear Aromatic Hydrocarbons from Contaminated Fish (progress Report) with Cover Letter dated 021286 & Epa Acknowlegement Letter. 1986
Pre-impoundment study of the North Anna River, Virginia 1972
Predation and freshwater communities 1980
Preliminary Results on an OECD 201 Freshwater Alga and Cyanobacteria, Growth lnhibition Test Conducted on a Mixture of Peroxydicarbonates, 30% Solution in Diethylene Glycol Bis(Allyl Carbonate) with 14-16% isopropyl sec-butyl peroxydicarbonate; 7-8% di-sec-butyl peroxydicarbonate; and 7-8% diisopropyl peroxydicarbonate. 2014
Preliminary Results on an OECD 201 Freshwater Alga and Cyanobacteria, Growth lnhibition Test on Tert-butylperoxy Isopropyl carbonate. 2014
Primary production, energetics and nutrient utilization in a warm-water stream / 1968
Primary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981 1983
Procedures for the derivation of equilibrium partitioning sediment benchmarks (ESBs) for the protection of benthic organisms compendium of Tier 2 values for nonionic organics / [electronic resource] : 2008
Proceedings : tiered testing issues for freshwater and marine sediments, Washington, D.C., September 16-18, 1992. 1992
Proceedings of symposium : biological criteria : research and regulation / 1991
Proceedings of the 1991 Midwest Pollution Control Biologists meeting : environmental indicators : measurement and assessment endpoints / 1992
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