Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5584
Discharge of oilfield-produced water in Nueces Bay, Texas: A case study Discharge of oilfield-produced water in Nueces Bay, Texas: A case study
During oil and gas production, water is often extracted from geological formations along with the hydrocarbons. These “produced waters” have been discharged to Nueces Bay since the turn of the century. These effluents were found to be highly toxic, and sediments in the vicinity of the discharges were also toxic. We developed a map of wells and produced-water discharge sites in the...
Authors
Claude D’Unger, Duane Chapman, R. Scott Carr
A 7 year record of above-ground net primary production in a southeastern Mexican mangrove forest A 7 year record of above-ground net primary production in a southeastern Mexican mangrove forest
Spatial and temporal variations in net above-ground primary production (NPP) and litter turnover rate were studied, from 1987 to 1993, in a mangrove forest bordering Laguna de Terminos, Mexico. NPP, the sum of total litter fall and wood production, was measured over the entire study period in three zones in a basin forest: zone I, where Rhizophora mangle (red mangrove) occurs but...
Authors
J.W. Day, Carlos Coronado-Molina, F. R. Vera-Herrera, R. Twilley, V. H. Rivera-Monroy, V. H. Alvarez-Guillen, Richard H. Day, William Conner
Water resources data, Iowa, water year 1995 Water resources data, Iowa, water year 1995
No abstract available.
Authors
J.E. May, J.G. Gorman, R.D. Goodrich, M.W. Bobier, V.E. Miller
Floods of July 12, 1972, March 19, 1979, and June 15, 1991, in the Turkey River Basin, northeast Iowa Floods of July 12, 1972, March 19, 1979, and June 15, 1991, in the Turkey River Basin, northeast Iowa
Water-surface-elevation profiles and peak discharges for the floods of July 12, 1972, March 19, 1979, and June 15, 1991, in the Turkey River Basin, northeast Iowa, are presented in this report. The profiles illustrate the 1979 and 1991 floods along the Turkey River in Fayette and Clayton Counties and along the Volga River in Clayton County; the 1991 flood along Roberts Creek in Clayton...
Authors
D. A. Eash, B.A. Koppensteiner
A two-step experimental design for a sediment bioassay using growth of the amphipod Hyalella azteca for the test end point A two-step experimental design for a sediment bioassay using growth of the amphipod Hyalella azteca for the test end point
We designed a sediment bioassay using 25% growth inhibition of Hyalella azteca as the end point.Hyalella azteca exhibits size-specific fecundity, so growth is a surrogate of reproductive production. We investigated density effects on growth to address whether crowding could affect test interpretation; amphipods in 14,000/m2 exposures were 16 to 20% smaller than those at 7,000/m2. Using...
Authors
Jody A. Kubitz, John M. Besser, John P. Giesy
A field investigation of the relationship between zinc and acid volatile sulfide concentrations in freshwater sediments A field investigation of the relationship between zinc and acid volatile sulfide concentrations in freshwater sediments
Understanding relationships between cationic metals such as cadmium, copper, nickel, lead and zinc, and amorphous iron sulfides, measured as acid volatile sulfide (AVS), is key to predicting metal bioavailability and toxicity insediments. The objective of the present study was to assess seasonal and spatial variations of AVS in freshwater sediments contaminated with zinc. Sediments were...
Authors
Gerald T. Ankley, Karsten Liber, Daniel J. Call, Thomas P. Markee, Timothy J. Canfield, Christopher G. Ingersoll
Species richness and biogeography of the herpetophauna in the Exuma Cays Land and Sea Park, Bahamas Species richness and biogeography of the herpetophauna in the Exuma Cays Land and Sea Park, Bahamas
Abstract not supplied at this time
Authors
C.K. Dodd, R. Franz
Estimates of abundance of box turtles (Terrapene carolina bauri) on a Florida island Estimates of abundance of box turtles (Terrapene carolina bauri) on a Florida island
Abstract not supplied at this time
Authors
C.A. Langtimm, C.K. Dodd, R. Franz
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
Congener-specific polychlorinated biphenyl patterns in eggs of aquatic birds from the lower Laguna Madre, Texas Congener-specific polychlorinated biphenyl patterns in eggs of aquatic birds from the lower Laguna Madre, Texas
Eggs from four aquatic bird species nesting in the Lower Laguna Madre, Texas, were collected to determine differences and similarities in the accumulation of congener-specific polychlorinated biphenyls (PCBs) and to evaluate PCB impacts on reproduction. Because of the different toxicities of PCB congeners, it is important to know which congeners contribute most to total PCBs. The...
Authors
Miguel A. Mora
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