Whole-lake burdens and spatial distribution of mercury in surficial sediments in Wisconsin seepage lakes
R.G. Rada, D.E. Powell, J.G. Wiener
1993, Canadian Journal of Fisheries and Aquatic Sciences (50) 865-873
We quantified total mercury in surficial sediments (uppermost 5 cm) of six small seepage lakes. Fifty cores were taken from each lake, based on a random sampling design stratified by water depth. Volumetric concentrations (mass per volume of wet sediment) more accurately portrayed the depth distribution of mercury...
Local earthquake tomography; earthquake source regions
Donna Eberhart-Phillips
1993, Book chapter, Seismic tomography; theory and practice
No abstract available ...
Differentiation of debris-flow and flash-flood deposits: implications for paleoflood investigations
Christopher F. Waythomas, Robert D. Jarrett
Shen Hsieh WenSu S.T.Wen Feng, editor(s)
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Debris flows and flash floods are common geomorphic processes in the Colorado Rocky Mountain Front Range and foothills. Usually, debris flows and flash floods are associated with excess summer rainfall or snowmelt, in areas were unconsolidated surficial deposits are relatively thick and slopes are steep. In the Front Range and...
Aquatic dissipation of triclopyr in Lake Seminole, Georgia
K.B. Woodburn, W. R. Green, H.E. Westerdahl
1993, Journal of Agricultural and Food Chemistry (41) 2172-2177
A field study was conducted to evaluate the environmental dissipation of triclopyr herbicide under aquatic-use conditions. Three 4-h plots in Lake Seminole, Georgia, were selected for use: one control, one aerial plot, and one subsurface plot; both applications were at the maximum aquatic-use rate of 2.5 mg/L. Water, sediment, plants,...
Acute toxicity of the herbicide bromoxynil to Daphnia magna
Kevin J. Buhl, Steven J. Hamilton, James C. Schmulbach
1993, Environmental Toxicology and Chemistry (12) 1455-1468
The acute toxicities of technical-grade bromoxynil octanoate (BO) and two commercial formulations, Buctril® and Bronate®, to < 24-h-old neonate Daphnia magna (Straus) were determined in soft, hard, and oligosaline water. In addition, effects of life stage, feeding, aging the herbicide, and exposure duration on BO toxicity to daphnids were investigated....
Caspian tern reproduction in the Saginaw Bay ecosystem following a 100-year flood event
James P. Ludwig, Heidi J. Auman, Hiroko Kurita, Matthew E. Ludwig, Loraine M. Campbell, John P. Giesy, Donald E. Tillitt, Paul Jones, Nobu Yamashita, Shinsuke Tanabe, Ryo Tatsukawa
1993, Journal of Great Lakes Research (19) 96-108
In the 2 years that followed the 100-year flood incident of September 1986 in the Saginaw River/Bay ecosystem, the reproduction of Caspian terns collapsed and then slowly recovered. Egg viability and fledging rates of hatched chicks were drastically depressed in 1987 and 1988. Eggs from clutches laid later in the...
Biomonitoring of lead-contaminated Missouri streams with an assay for erythrocyte δ-aminolevulinic acid dehydratase activity in fish blood
C.J. Schmitt, M. L. Wildhaber, J. B. Hunn, T. Nash, M. N. Tieger, B. L. Steadman
1993, Archives of Environmental Contamination and Toxicology (25) 464-475
The activity of the enzyme δ-aminolevulinic acid dehydratase (ALA-D) in erythrocytes has long been used as a biomarker of lead exposure in humans and waterfowl and, more recently, in fishes. The assay was tested for ALA-D activity in fishes from streams affected by lead in combination with other metals from...
Recovery planning and reintroduction of the Federally threatened Pitcher's thistle (Cirsium pitcheri) in Illinois
M. Bowles, R. Flackne, Kathryn McEachern, N. Pavlovic
1993, Natural Areas Journal (13) 164-176
No abstract available....
Carbon isotopic data from test hole USW UZ-1, Yucca Mountain, Nevada
In C. Yang, C.A. Peters, D.C. Thorstenson
1993, Conference Paper, High Level Radioactive Waste Management
Rock-CO2-gas analyses in test hole USW UZ-1 at Yucca Mountain indicate that gas movement in the unsaturated zone is likely through a dry-fracture system with little porewater or caliche-calcite interaction. This is because near-surface ??13C values are of biogenic origin and have changed little throughout the total depth. Post-bomb 14C...
Geomorphic observations of rivers in the Oregon Coast Range from a regional reconnaissance perspective
S. Rhea
1993, Geomorphology (6) 135-150
Changes in long profile, gradient, gradient index, pseudo-hypsometric integral, valley incision, and sinuosity fractal dimension for rivers in western Oregon were studied to determine their usefulness in assessing an hypothesis of differential uplift within the Coast Range. All data were gathered from...
234U/238U as a ground-water tracer, SW Nevada-SE California
K.R. Ludwig, Z. E. Peterman, K. R. Simmons, E. D. Gutentag
1993, Conference Paper, Proceedings of the 4th annual international conference on high level radioactive waste management
The 234U/238U ratio of uranium in oxidizing ground waters is potentially an excellent ground-water tracer because of its high solubility and insensitivity to chemical reactions. Moreover, recent advances in analytical capability have made possible very precise uranium-isotopic analyses on modest (approx.100 ml) amounts of normal ground water. Preliminary results on...
Evidence for Regional Stream Aggradation in the Central Oregon Coast Range during the Pleistocene-Holocene Transition
S. F. Personius, H.M. Kelsey, P.C. Grabau
1993, Quaternary Research (40) 297-308
Low, nearly continuous terraces of similar age are present along streams in drainage basins that range in size from Drift Creek (190 km2) to the Umpqua River (11,800 km2) in the Oregon Coast Range. Radiocarbon ages from near the bose of fluvial sediments underlying these terraces are clustered at about...
Conservation genetics of managed ungulate populations
Kim T. Scribner
1993, Acta Theriologica (38) 89-101
Natural populations of many species are increasingly impacted by human activities. Perturbations are particularly pronunced for large ungulates due in part to sport and commercial harvest, to reductions and fragmentation of native habitat, and as the result of reintroductions. These perturbations affect population size, sex and age composition, and population...
Spawning and rearing habitat use by white sturgeons in the Columbia River downstream from McNary Dam
Michael J. Parsley, Lance G. Beckman, George T. McCabe Jr.
1993, Transactions of the American Fisheries Society (122) 217-227
Spawning and rearing habitats used by white sturgeons Acipenser transmontanuswere described from water temperature, depth, and velocity measurements and substrate types present at sites where eggs, larvae, young-of-the-year, and juveniles (ages 1–7) were collected. Spawning and egg incubation occurred in the swiftest water available (mean water column velocity, 0.8–2.8 m/s),...
Sampling and major element chemistry of the recent (A.D. 1631-1944) Vesuvius activity
H. E. Belkin, C.R.J. Kilburn, B. de Vivo
1993, Journal of Volcanology and Geothermal Research (58) 273-290
Detailed sampling of the Vesuvius lavas erupted in the period A.D. 1631-1944 provides a suite of samples for comprehensive chemical analyses and related studies. Major elements (Si, Ti, Al, Fetotal, Mn, Mg, Ca, Na, K and P), volatile species (Cl, F, S, H2O+, H2O- and CO2), and ferrous iron (Fe2+)...
Factors affecting spawning and recruitment of white sturgeon in the Columbia River downstream from McNary Dam
M.J. Parsley, J. Anders, Allen I. Miller, L.G. Beckman, G.T. McCabe Jr.
R.C. Beamesderfer, A.A. Nigro, editor(s)
1993, Report, Status and habitat requirements of the white sturgeon populations in the Columbia River downstream from McNary Dam, Volume I
No abstract available...
Relation of local scour to hydraulic properties at selected bridges in New York
Gerard K. Butch
Shen Hsieh WenSu S.T.Wen Feng, editor(s)
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Hydraulic properties, bridge geometry, and basin characteristics at 31 bridges in New York are being investigated to identify factors that affect local scour. Streambed elevations measured by the U.S. Geological Survey and New York State Department of Transportation are used to estimate local-scour depth. Data that show zero or minor...
Hormonal control of hepatic glycogen metabolism in food-deprived, continuously swimming coho salmon Oncorhynchus kisutch
M.M. Vijayan, A.G. Maule, C.B. Schreck, T.W. Moon
1993, Canadian Journal of Fisheries and Aquatic Sciences (50) 1676-1682
The plasma cortisol concentration and liver cytosolic glucocorticoid receptor activities of continuously swimming, food-deprived coho salmon (Oncorhynchus kisutch) did not differ from those of resting, fed fish. Plasma glucose concentration was significantly higher in the exercising, starved fish, but there were no significant differences in either hepatic glycogen concentration or...
Use of geophysical data to assess scour development
Gary Placzek, Peter F. Haeni, Roy Trent
Shen Hsieh WenSu S.T.Wen Feng, editor(s)
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
The development of scour holes in the Connecticut River near the new Baldwin Bridge has been documented by comparing geophysical records collected before (1989), during (1990), and after (1992) bridge construction. Eight piers that support the 570-m (meter) span over the Connecticut River were protected by 12-m wide cofferdams during...
Seasonal use of conservation reserve program lands by white-tailed deer in east-central South Dakota
Jeffrey H. Gould, Kurt J. Jenkins
1993, Wildlife Society Bulletin (21) 250-255
The Conservation Reserve Program (CRP_, a provision of the 1985 Food Security Act, subsidizes landowners to take highly erodible lands out of cultivation and seed them to perennial cover for 10years. In eastern South Dakota, 0.5 million ha were enrolled in the CRP from 1985 to 1990 (Agric. Stabilization and...
Probabalistic projections for recovery of the endangered Cui-ui
John M. Emlen, Thomas A. Strekal, Chester C. Buchanan
1993, North American Journal of Aquaculture (13) 467-474
The cui-ui Chamistes cujus, a lake sucker found in only Pyramid Lake, Nevada, is listed as endangered under the U.S. Endangered Species Act, and a recovery plan has been formulated in an effort to save it. We used a population simulation model that incorporated environmental stochasticity in water availability to...
Wind and tidal forcing of a buoyant plume, Mobile Bay, Alabama
R. P. Stumpf, G. Gelfenbaum, J.R. Pennock
1993, Continental Shelf Research (13) 1281-1301
AVHRR satellite imagery and in situ observations were combined to study the motion of a buoyant plume at the mouth of Mobile Bay, Alabama. The plume extended up to 30 km from shore, with a thickness of about 1 m. The inner plume, which was 3-8 m thick, moved between...
Prey selection by juvenile white sturgeon in reservoirs of the Columbia River
C.R. Sprague, L.G. Beckman
R.C. Beamesderfer, A.A. Nigro, editor(s)
1993, Report, Status and habitat requirements of the white sturgeon populations in the Columbia River downstream from McNary Dam, Volume II
No abstract available ...
Predation on white sturgeon eggs by sympatric fish species in three Columbia River impoundments
Allen I. Miller, L.G. Beckman
1993, Report, Status and habitat requirements of white sturgeon populations in the Columbia River downstream from McNary Dam, Volume II
No abstract available ...
Interaction between native and nonnative fish of the upper Muddy River, Nevada
G. Gary Scoppettone
1993, Transactions of the American Fisheries Society (122) 599-608
I investigated interactions between native and nonnative fishes in the upper Muddy River system to add insight into (1) the mechanism causing the decline of the Moapa dace Moapa coriacea after the introduction of the shortfin molly Poecilia mexicana, (2) the reason Moapa White River springfish Crenichthys bailevi moapaewere less...
