Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
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Marsh vertical accretion in a Southern California Estuary, U.S.A Marsh vertical accretion in a Southern California Estuary, U.S.A
Vertical accretion was measured between October 1992 and March 1994 in low and high saltmarsh zones in the north arm of Tijuana estuary from feldspar market horizons and soil corings. Accretion in the Spartina foliosa low marsh (2-8.5 cm) was related almost entirely to episodic storm-induced river flows between January and March 1993, with daily tidal flooding contributing little or no...
Authors
Donald R. Cahoon, J.C. Lynch, A.N. Powell
Sediment porewater toxicity assessment studies in the vicinity of offshore oil and gas production platforms in the Gulf of Mexico Sediment porewater toxicity assessment studies in the vicinity of offshore oil and gas production platforms in the Gulf of Mexico
As part of a multidisciplinary program to assess the potential long-term impacts of offshore oil and gas exploration and production activities in the Gulf of Mexico, sediment chemical analyses and porewater toxicity tests were conducted in the vicinity of five offshore platforms. Based on data from sea urchin fertilization and embryological development assays, toxicity was observed near...
Authors
R.S. Carr, D.C. Chapman, B.J. Presley, J.M. Biedenbach, L. Robertson, P. Boothe, R. Kilada, T. Wade, P. Montagna
Toxicity of inorganic contaminants, individually and in environmental mixtures, to three endangered fishes (Colorado squawfish, bonytail, and razorback sucker) Toxicity of inorganic contaminants, individually and in environmental mixtures, to three endangered fishes (Colorado squawfish, bonytail, and razorback sucker)
Two life stages of three federally-listed endangered fishes, Colorado squawfish (Ptychocheilus lucius), bonytail (Gila elegans), and razorback sucker (Xyrauchen texanus) were exposed to copper, selenate, selenite, and zinc individually, and to mixtures of nine inorganics in a reconstituted water that simulated the water quality of the middle Green River, Utah. The mixtures simulated...
Authors
Kevin J. Buhl, S. J. Hamilton
Interlaboratory study of precision: Hyalella azteca and Chironomus tentans freshwater sediment toxicity assays Interlaboratory study of precision: Hyalella azteca and Chironomus tentans freshwater sediment toxicity assays
Standard 10-d whole-sediment toxicity test methods have recently been developed by the U.S. Environmental Protection Agency (EPA) for the amphipod Hyalella azteca and the midge Chironomus tentans. An interlaboratory evaluation of method precision was performed using a group of seven to 10 laboratories, representing government, academia, and environmental consulting firms. The test...
Authors
G.A. Burton, T. J. Norberg-King, C.G. Ingersoll, D.A. Benoit, G.T. Ankley, P. V. Winger, J. Kubitz, J.M. Lazorchak, M.E. Smith, E. Greer, F.J. Dwyer, D.J. Call, K.E. Day, P. Kennedy, M. Stinson
Small mammal populations in Maryland meadows during four years of herbicide (brominal®) applications Small mammal populations in Maryland meadows during four years of herbicide (brominal®) applications
The herbicide Brominal® was applied at the recommended rate to one plot in each of three paired 0.6-ha plots; the other three plots were used as controls. Plots were sprayed once in the fall of 1988 and 1989 and twice in the spring of 1990 and 1991. Small mammals were trapped three times during each activity season (April-October) to obtain population estimates before and after spraying...
Authors
D. R. Clark, C.A. Moulton, J.E. Hines, D. J. Hoffman
Proposed environmental monitoring plan for the Bird Island Marine Reserve, Antigua. An Island Resources Foundation Report for the Organization of American States (Performance Contract No.WSC14721) Proposed environmental monitoring plan for the Bird Island Marine Reserve, Antigua. An Island Resources Foundation Report for the Organization of American States (Performance Contract No.WSC14721)
Abstract not supplied at this time
Authors
G. Chambers, V. Garrison
A review of herpetology of the Bahamian archipelago A review of herpetology of the Bahamian archipelago
Abstract not supplied at this time
Authors
R. Franz, C.K. Dodd, S.D. Buckner
Description, instructions, and verification for Basinsoft, a computer program to quantify drainage- basin characteristics Description, instructions, and verification for Basinsoft, a computer program to quantify drainage- basin characteristics
Basinsoft is a computer program developed to utilize digital cartographic data to quantify 27 selected morphometric characteristics and optional area-weighted characteristics for a drainage basin. The programs comprising Basinsoft were written in Arc Macro Language (AML), a post-processing language written to run in ARC/INFO, a proprietary geographic information system (GIS). Basinsoft...
Authors
Craig A. Harvey, David A. Eash
Flood of May 19, 1990, along Perry Creek in Plymouth and Woodbury counties, Iowa Flood of May 19, 1990, along Perry Creek in Plymouth and Woodbury counties, Iowa
A water-surface-elevation profile and peak discharges for the flood of May 19, 1990, along Perry Creek in Plymouth and Woodbury Counties, Iowa, are presented in this report. The peak discharge for the May 19,1990, flood on Perry Creek at 38th Street, Sioux City (06600000) is the second largest flood-peak discharge recorded at the streamflow-gaging station for the period 1939-95. The peak...
Authors
D. A. Eash
Transport of agricultural chemicals in surface flow, tileflow, and streamflow of Walnut Creek Watershed near Ames, Iowa, April 1991-September 1993 Transport of agricultural chemicals in surface flow, tileflow, and streamflow of Walnut Creek Watershed near Ames, Iowa, April 1991-September 1993
The U.S. Geological Survey, in cooperation with the National Soil Tilth Laboratory of the U.S. Department of Agriculture, Agricultural Research Service, conducted a study as part of the multi-scale, inter-agency Management Systems Evaluation Area (MSEA) program to evaluate the effects of agricultural management (farming) systems on water quality. Data on surface flow, tileflow, and...
Authors
P. J. Soenksen
New records of fishes at Isla del Coco, Costa Rica New records of fishes at Isla del Coco, Costa Rica
Isla del Coco lies at 5 degrees 32'N latitude, 87 degrees 04'W longitude and is the sole peak of the Cocos Ridge exposed above sea level. This isolated island formed approximately 2 million years ago. It rises 575 m above the surface of the sea and covers 46 km2 (Castillo et aI., 1988). Five hundred km to the NNE is Costa Rica; 630 km SSW are the Galapagos Islands; 650 km to the E is...
Authors
V.H. Garrison