Search Results for the EPA National Library Catalog

Items Found: 1985
Showing: Items 1 - 50
Your Search: (SUBJECT=Ecosystems)


 
 
 
1 2 3 4 5 6 7 8 9 10 11 12 ... 40 NEXT
Select Item Title Year Published
15N Natural Abundance and (15)N Labelling Studies in Forest Ecosystems. 1994
1997 atlas of Chesapeake Bay Basin biological and living resources long term monitoring programs 1997
1999 Update of ambient water quality criteria for ammonia. 1999
2003 update of ambient water quality criteria for copper : (CAS registry number 7440-50-8) / 2003
2003-2008 EPA strategic plan : direction for the future / 2003
2006-2011 EPA strategic plan : charting our course / 2006
A Biomass Future for the North American Great Plains Toward Sustainable Land Use and Mitigation of Greenhouse Warming / [electronic resource] : 2007
A Changing World Challenges for Landscape Research / [electronic resource] : 2007
A Coast in common : an introduction to the Eastern African Action Plan. 1989
A Commitment to watershed protection / 1993
A comparison of the MESA-Puget Sound oil spill model with wind and current observations from August 1978 / 1981
A comprehensive list of Chesapeake Bay basin species 1997 / 1997
A conceptual model for the movement of pesticides through the environment : a contribution of the EPA Alternative Chemicals Program / 1974
A conceptual representation of the New York Bight ecosystem / 1975
A dynamic river basin water quality model / 1991
A field-based aquatic life benchmark for conductivity in central Appalachian streams. 2011
A gas-exchange system for assessing plant performance in response to environmental stress / 1979
A hunger for high country : one woman's journey to the wild in Yellowstone country / 2014
A national assessment of landscape change and impacts to aquatic resources : a 10-year research strategy for the landscape sciences program. / 2000
A Natural system for wastewater reclamation and resource enhancement : Arcata, California. 1993
A Phase I inventory of current EPA efforts to protect ecosystems / 1995
A primer of ecology / 2008
A Review of ecological assessment case studies from a risk assessment perspective / 1993
A Review of ecological assessment case studies from a risk assessment perspective / 1993
A Review of ecological assessment case studies from a risk assessment perspective : volume II. 1994
A review of single species toxicity tests : are the tests reliable predictors of aquatic ecosystem community responses? / 1999
A synoptic approach to cumulative impact assessment : a proposed methodology / 1992
Abiotic Transformation Pathways of Organic Chemicals in Aquatic Ecosystems. 1994
Abiotic Transformations of Toxic Organic Chemicals in the Liquid Phase and Sediments. 1988
About Life Concepts in Modern Biology / [electronic resource] : 2007
Abstracts of publications and presentations, 1985-1986. 1988
Accumulation of atmospheric sulfur by plants and sulfur-supplying capacity of soils / 1979
Accumulation of tritium in various species of fish reared in tritiated water. / 1974
Acid Deposition in Maryland. Summary of 1993 Research and Monitoring Results and Evaluation of Status and Trends. 1995
Acid Precipitation Phenomenon and Its Ecological Consequences. 1981
Acid rain : a student's first sourcebook / 1990
Acid Rain Program, 2002 Progress Report. 2003
Acid rain. 1980
Acid-Base Characteristics of Organic Carbon in the Humex Lake Skjervatjern. 1992
Acid-Volatile Sulfide as a Factor Mediating Cadmium and Nickel Bioavailability in Contaminated Sediments. 1991
Acidic Deposition and Aquatic Ecosystems: Regional Case Studies. 1990
Acidic Deposition Phenomenon and Its Effects: Critical Assessment Review Papers. Volume 1. Atmospheric Sciences (Review Draft). 1983
Acidic Deposition Phenomenon and Its Effects: Critical Assessment Review Papers. Volume 2. Effects Sciences (Review Draft). 1983
Acidification of Aquatic and Terrestrial Systems: Chemical Weathering. 1984
Acidification of Rain by the Oxidation of Dissolved SO2 and the Absorption of HNO3. 1984
Activities report of the Basic and Applied Sciences Branch Division of Water Supply and Pollution Control. 1963
Acute Effects of Stream Acidification on the Diversity of Macroinvertebrate Drift. 1982
Adaptation of Aquatic Microbial Communities to Pollutant Stress. 1988
Advances in Integrated Soil Fertility Management in sub-Saharan Africa: Challenges and Opportunities [electronic resource] / 2007
Advisory on the need to develop ecological risk management guidelines. 1997
1 2 3 4 5 6 7 8 9 10 11 12 ... 40 NEXT

Save, Print or Email Selected Records