Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5654
Food preferences of spring-migrating blue-winged teal in southwestern Louisiana Food preferences of spring-migrating blue-winged teal in southwestern Louisiana
We studied effects of pair status, molt intensity, and year on food selection by migrating male blue-winged teal (Anas discors) in southwestern Louisiana during springs 1990 and 1991. Diets consisted primarily of animal foods; but plant material, consisting mostly of seeds, comprised as much as 44%. There was no difference in animal food consumption by paired and unpaired males; however...
Authors
Scott W. Manley, W.L. Hohman, J.L. Moore, David Richard
Baseline levels of certain trace metals in sediment and biota Baseline levels of certain trace metals in sediment and biota
No abstract available.
Authors
A. J. Krynitsky, C.P. Rice, P.F. Roscigno
Methods for analyzing temporal changes in landscape patterns Methods for analyzing temporal changes in landscape patterns
No abstract available
Authors
Christopher P. Dunn, David M. Sharpe, Glenn R. Guntenspergen, F. Stearns, Z. Yang
Managing Louisiana marshes-An experimental approach Managing Louisiana marshes-An experimental approach
No abstract available.
Authors
E.C. Pendleton, A. Lee Foote, Glenn R. Guntenspergen
Landscape simulation of coastal wetlands Landscape simulation of coastal wetlands
No abstract available.
Authors
Thomas W. Doyle
Ecosystem modeling of Barataria Basin, Louisiana utilizing desktop parallel technology Ecosystem modeling of Barataria Basin, Louisiana utilizing desktop parallel technology
No abstract available.
Authors
M. L. White, T. Maxwell, R. Costanza, Thomas W. Doyle
USFWS selected geographic analyses USFWS selected geographic analyses
The geographic information system (GIS) used by the National Wetlands Research Center (NWRC) of the U.S. Fish and Wildlife Service has been valuable in assisting natural resource managers in planning and managing coastal fish and wildlife resources. In the past 5 years, NWRC has conducted about 60 studies employing this technology. Applications have ranged from simple natural resource...
Authors
Floyd O. Stayner, James D. Scurry, James B. Johnston, Mary C. Watzin, Pasquale F. Roscigno
Estimating wintering Bald Eagle densities in the Mississippi Alluvial Valley Estimating wintering Bald Eagle densities in the Mississippi Alluvial Valley
Surveys on the winter distribution of Bald Eagles have been concentrated in the northern USA (Hastings 1988, Mattson 1988), where Bald Eagles are most common. Few density estimates for wintering Bald Eagles exist. In the past, different survey techniques with little standardization have been used. Statistical analyses and error measurements of existing winter survey data usually are not...
Authors
Mike Brown, James R. Nassar
Global climate change: USFWS coastal research Global climate change: USFWS coastal research
Scenarios of global climate change are still ambiguous; however, increasing sea level and atmospheric carbon dioxide (CO2) concentrations seem certain, although rates of change are still being debated. Predictions for other aspects of climate change, such as temperature, tropical storm frequency and intensity, and precipitation, are still in debate, and all predictions for local (e.g...
Authors
Janet R. Keough, Thomas W. Doyle, Robert E. Stewart
Effects of site, landscape features, and fire regime on vegetation patterns in presettlement southern Wisconsin Effects of site, landscape features, and fire regime on vegetation patterns in presettlement southern Wisconsin
The presettlement tree cover (1831–33) of 3 townships in a southern Wisconsin landscape was analyzed using original survey records. Four forest types were identified: closed forest, open forest, savanna, and prairie. Comparisons of vegetation types and landscape pattern were made between the east and west sides of the Pecatonica River, which bisects the landscape and could have acted as...
Authors
Lawrence A. Leitner, Christopher P. Dunn, Glenn R. Guntenspergen, F. Stearns, David M. Sharpe
Incubation rhythm components for three Cinnamon Teal nesting in California Incubation rhythm components for three Cinnamon Teal nesting in California
No abstract available.
Authors
William L. Hohman
Sensitivity of greenback cutthroat trout to acidic pH and elevated aluminum Sensitivity of greenback cutthroat trout to acidic pH and elevated aluminum
The greenback cutthroat trout Oncorhynchus clarki stomias is a threatened subspecies native to the upper South Platte and Arkansas rivers between Denver and Fort Collins, Colorado, an area also susceptible to acid deposition. In laboratory studies, we exposed this subspecies to nominal pHs of 4.5–6.5 and to nominal aluminum concentrations of 0, 50, 100, and 300 μg/L; the control was pH 6...
Authors
D. F. Woodward, Aida M. Farag, E. E. Little, B. L. Steadman, R. Yancik