Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5655
Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the Midcontinental United States, 1991 Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the Midcontinental United States, 1991
Water samples were collected during the spring and summer of 1991 from 303 wells penetrating near-surface unconsolidated and bedrock aquifers of the midcontinental United States. Samples were analyzed for 11 herbicides, 2 dealkylated atrazine metabolites, and 4 nutrients. Specific conductance, pH, and dissolved-oxygen concentrations of the ground water were measured onsite. Ancillary...
Authors
D.W. Kolpin, M. R. Burkart, E.M. Thurman
Biomagnification of bioassay derived 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents Biomagnification of bioassay derived 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents
In recent years contamination of the Great Lakes ecosystem with planar chlorinated hydrocarbons (PCHs) has attracted considerable concern due to their known reproductive and teratogenic effects. The H4IIE bioassay has been standardized as a means of measuring the biological potency of a PCH mixture as 2,3,7,8-tetrachloro-p-dibenzodioxin equivalents (TCDD-EQ). Using this bioassay we have
Authors
P. D. Jones, G.T. Ankley, D. A. Best, R. Crawford, N. DeGalan, J. P. Giesy, T.J. Kubiak, J. P. Ludwig, J.L. Newsted, D. E. Tillitt, D. A. Verbrugge
Activated mutatox assay for detection of genotoxic substances Activated mutatox assay for detection of genotoxic substances
No abstract available.
Authors
B. Thomas Johnson
[Book review] Battle against extinction: Native fish management in the American West, by W. L. Minckley and J. E. Deacon [Book review] Battle against extinction: Native fish management in the American West, by W. L. Minckley and J. E. Deacon
Review of: BATTLE AGAINST EXTINCTION: NATIVE FISH MANAGEMENT IN THE AMERICAN WEST. W. L. Minckley and J. E. Deacon (eds.). 1991. The University of Arizona Press, Tucson. ISBN 0-8165-1221-3. 517 p., $40.00 (hardcover).
Authors
S. J. Walsh
Persoective: From backwater to mainstream? Persoective: From backwater to mainstream?
No abstract available.
Authors
J. A. Allen
Atrazine degradation in a small stream in Iowa Atrazine degradation in a small stream in Iowa
A study was conducted during 1990 through an 11.2-km reach of Roberts Creek in northeastern Iowa to determine the fate of atrazine in a surface water environment Water samples were collected at ~1-month intervals from April through November during stable low to medium flow conditions and analyzed for atrazine and two of its initial biotic degradation products, desethylatrazine and
Authors
D.W. Kolpin, S. J. Kalkhoff
Bluegreen and red algae identified from Florida loggerhead turtle Bluegreen and red algae identified from Florida loggerhead turtle
Abstract not supplied at this time
Authors
C.K. Dodd, C.J. Dawes
Additions to the herpetofauna of Egmont Key, Hillsborough County, Florida Additions to the herpetofauna of Egmont Key, Hillsborough County, Florida
Abstract not supplied at this time
Authors
L. L. Smith, R. Franz, C.K. Dodd
Use of mesocosm data to predict effects in aquatic ecosystems: Limits to interpretation: Chapter 16 Use of mesocosm data to predict effects in aquatic ecosystems: Limits to interpretation: Chapter 16
Aquatic mesocosm studies are being used to refute a presumption of risk derived from laboratory toxicity tests conducted under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). Mesocosm studies incorporate many biological, chemical and physical characteristics of natural ecosystems. Hence, they serve as realistic surrogates of natural ecosystems and allow tests of...
Authors
Thomas W. La Point, James F. Fairchild
Water, energy, and biogeochemical budgets investigation at Panola Mountain research watershed, Stockbridge, Georgia; A research plan Water, energy, and biogeochemical budgets investigation at Panola Mountain research watershed, Stockbridge, Georgia; A research plan
The Panola Mountain Research Watershed (PMRW), located in the Panola Mountain State Conservation Park near Stockbridge, Georgia has been selected as a core research watershed under the Water, Energy and Biogeochemical Budgets (WEBB) research initiative of the U.S. Geological Survey (USGS) Global Climate Change Program. This research plan describes ongoing and planned research activities...
Authors
Thomas G. Huntington, R. P. Hooper, N.E. Peters, T.D. Bullen, Carol Kendall
Regional West Indian manatee 1992 Studbook Regional West Indian manatee 1992 Studbook
Abstract not supplied at this time
Authors
C.L. Salisbury, C.A. Beck