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Search Results for the EPA National Library Catalog
Items Found: 713
Showing: Items 501 - 550
Your Search: (SUBJECT=aquatic ecosystems)
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Year Published
501
Physical and Chemical Stratification in Two High Altitude Reservoirs of the Colorado River Basin.
1963
502
Physical Impacts to Habitats in Tampa Bay.
1994
503
Physiological Limitations on Phytoplankton Productivity in the Ocean.
1992
504
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
505
Pilot study to evaluate biological, physical, chemical, and land-use characteristics in Maryland coastal plain streams
1993
506
Pilot Study to Evaluate Biological, Physical, Chemical, and Land-Use Characteristics in Maryland Coastal Plain Streams. Year 2.
1995
507
Pintail Lake and Redhead Marsh : created wetlands in Northern Arizona.
1993
508
PIRLA Project (Paleoecological Investigation of Recent Lake Acidification): An Introduction to the Synthesis of the Project.
1990
509
Piscataqua Region Estuaries Partnership Comprehensive Conservation and Management Plan Update: Stakeholder Input and Meeting Summary Report.
2009
510
Plants and pollutants in developed and developing countries
1989
511
Pollutant Dynamics as Influenced by Seagrass Beds: Experiments with Tributyltin in 'Thalassia' Microcosms.
1990
512
Pollution of Slocum Creek, Havelock, North Carolina. A Cooperative Investigation by the State of North Carolina, Department of the Navy, and the Federal Water Pollution Control Administration.
1969
513
Pollution of Slocum Creek, Havelock, North Carolina. Appendices. A Cooperative Investigation by the State of North Carolina, Department of the Navy, and the Federal Water Pollution Control Administration.
1969
514
Potential Impact of Stratospheric Ozone Depletion on Marine Ecosystems.
1989
515
Potential intertidal habitat restoration sites in the Duwamish River Estuary
1991
516
Predicting future introductions of nonindigenous species to the Great Lakes /
2008
517
Predicting future introductions of nonindigenous species to the Great Lakes /
2008
518
Prediction of Substrate Removal Rates of Attached Microorganisms and of Relative Contributions of Attached and Suspended Communities at Field Sites.
1988
519
Preliminary Evaluation of Potential Effects of Bathymetric Alterations of the Chesapeake and Delaware Canal on Striped Bass.
1992
520
Priorities for Coastal Ecosystem Science.
1994
521
Prioritization of Pesticide Active Ingredients (PAIs): Based on Commonly Known Environmental Characteristics.
1990
522
Probabilistic ecological risk assessment of tributyltin in the Chesapeake Bay watershed : final report /
1998
523
Probable causes of trends in selected living resources in the Galveston Bay system
1993
524
Procedures for the derivation of equilibrium partitioning sediment benchmarks (ESBs) for the protection of benthic organisms : dieldrin /
2003
525
Procedures for the derivation of equilibrium partitioning sediment benchmarks (ESBs) for the protection of benthic organisms : PAH mixtures /
2003
526
Proceedings : biostimulation - nutrient assessment workshop /
1975
527
Proceedings : Delmarva Coastal Bays Conference III : tri-state approaches to preserving aquatic resources, November 12-13, 1999, Ocean City, Maryland /
2000
528
Proceedings of symposium : biological criteria : research and regulation /
1991
529
Proceedings of the First National Workshop on Biological Criteria : held in Lincolnwood, Illinois, December 2-4, 1987 /
1988
530
Proceedings of the ocean dumping workshop, 106-mile site held March 28-30, 1989, Ocean City, NJ
1989
531
Proceedings: Galveston Bay Characterization Workshop. Held on February 21-23, 1991.
1992
532
Proceedings: Integrated Research Planning Meeting for Gulf of Mexico Estuaries. Held in Gulf Breeze, Florida on November 2-3, 1993.
1994
533
Progress in the National Estuary Program : report to Congress.
1990
534
Propeller Scar Monitoring Program for the Tampa Bay Estuary Program.
1996
535
Proposed Methods and Approaches for Numeric Nutrient Criteria for Florida's Inland Waters.
2009
536
Proposed Water Quality Guidance for the Great Lakes System.
1993
537
Protection and Restoration of Marine Life in the Inland Waters of Washington State.
1997
538
Puget Sound Research '95 Proceedings. Held Meydenbauer Center, Bellevue, Washington, January 12-14, 1995.
1995
539
QSARs for Photoinduced Toxicity: 1. Acute Lethality of Polycyclic Aromatic Hydrocarbons to 'Daphnia magna'.
1994
540
Quality assurance project plan for evaluating and refining the estuarine habitat assessment protocol on Puget Sound and Pacific Northwest reference sites
1993
541
Radioecology in Nordic limnic systems - present knowledge and future prospects.
1991
542
Realistic approaches to better floodplain management [Microfiche] : proceedings of the Eleventh Annual Conference of the Association of State Floodplain Managers, June 8-13, 1987, Seattle, Washington.
1987
543
Recommendation for the 2003 Directive on Expanded Riparian Forest Buffer Goals in the Chesapeake Watershed.
2003
544
Recommendations for (a) the Reauthorization of the National Invasive Species Act of 1996, and (b) the National Ballast Management Program, to Address Issues of Concern for the Chesapeake Bay Region.
2001
545
Recommended biological indices for 301(h) monitoring programs : final report /
1987
546
Regional Framework for Establishing Recovery Criteria.
1990
547
Regional Patterns in Three Biological Indicators of Stream Condition in Ohio.
1991
548
Regulatory impact analysis of the final Great Lakes water quality guidance.
1995
549
Regulatory Impact Analysis of the Proposed Great Lakes Water Quality Guidance.
1993
550
Removing impediments to migratory fishes in the Chesapeake Bay watershed : annual progress report 1995 /
1996
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