Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management
W.H. McAnally, A. Teeter, David H. Schoellhamer, C. Friedrichs, D. Hamilton, E. Hayter, P. Shrestha, H. Rodriguez, A. Sheremet, R. Kirby
2007, Journal of Hydraulic Engineering (133) 23-38
Techniques for measurement, modeling, and management of fluid mud are available, but research is needed to improve them. Fluid mud can be difficult to detect, measure, or sample, which has led to new instruments and new ways of using existing instruments. Multifrequency acoustic fathometers sense neither density...
A rangewide population genetic study of trumpeter swans
S.J. Oyler-McCance, F.A. Ransler, L.K. Berkman, T.W. Quinn
2007, Conservation Genetics (8) 1339-1353
For management purposes, the range of naturally occurring trumpeter swans (Cygnus buccinator) has been divided into two populations, the Pacific Coast Population (PP) and the Rocky Mountain Population (RMP). Little is known about the distribution of genetic variation across the species' range despite increasing pressure to make difficult management decisions...
Associations of decadal to multidecadal sea-surface temperature variability with Upper Colorado River flow
G.J. McCabe, J.L. Betancourt, H.G. Hidalgo
2007, Journal of the American Water Resources Association (43) 183-192
The relations of decadal to multidecadal (D2M) variability in global sea-surface temperatures (SSTs) with D2M variability in the flow of the Upper Colorado River Basin (UCRB) are examined for the years 1906-2003. Results indicate that D2M variability of SSTs in the North Atlantic, North Pacific, tropical Pacific, and Indian Oceans...
Quantification of changes in metal loading from storm runoff, Merse River (Tuscany, Italy)
Briant A. Kimball, F. Bianchi, Katherine Walton-Day, Robert L. Runkel, M. Nannucci, A. Salvadori
2007, Mine Water and the Environment (26) 209-216
The Merse River in Tuscany is affected by mine drainage and the weathering of mine wastes along several kilometres of its catchment. The metal loading to the stream was quantified by defining detailed profiles of discharge and concentration, using tracer-dilution and synoptic-sampling techniques. During the course of a field experiment...
Spawning distribution of sockeye salmon in a glacially influenced watershed: The importance of glacial habitats
Daniel Young, C.A. Woody
2007, Transactions of the American Fisheries Society (136) 452-459
The spawning distribution of sockeye salmon Oncorhynchus nerka was compared between clear and glacially turbid habitats in Lake Clark, Alaska, with the use of radiotelemetry. Tracking of 241 adult sockeye salmon to 27 spawning locations revealed both essential habitats and the relationship between spawn timing and seasonal turbidity cycles. Sixty-six...
Correlations between Cassini VIMS spectra and RADAR SAR images: Implications for Titan's surface composition and the character of the Huygens Probe Landing Site
Laurence A. Soderblom, Randolph L. Kirk, Jonathan I. Lunine, Jeffrey A. Anderson, Kevin H. Baines, Jason W. Barnes, Janet M. Barrett, Robert H. Brown, Bonnie J. Buratti, Roger N. Clark, Dale P. Cruikshank, Charles Elachi, Michael A. Janssen, Ralf Jaumann, Erich Karkoschka, Stéphane Le Mouélic, Rosaly Lopes, Ralph D. Lorenz, Thomas B. McCord, Philip D. Nicholson, Jani Radebaugh, Bashar Rizk, Christophe Sotin, Ellen R. Stofan, Tracie L. Sucharski, Martin G. Tomasko, Stephen D. Wall
2007, Planetary and Space Science (55) 2025-2036
Titan's vast equatorial fields of RADAR-dark longitudinal dunes seen in Cassini RADAR synthetic aperture images correlate with one of two dark surface units discriminated as “brown” and “blue” in Visible and Infrared Mapping Spectrometer (VIMS) color composites of short-wavelength infrared spectral cubes (RGB as 2.0, 1.6, 1.3 μm). In such composites...
Impacts of waste from concentrated animal feeding operations on water quality
J. Burkholder, B. Libra, P. Weyer, S. Heathcote, D. Kolpin, P.S. Thorne, M. Wichman
2007, Environmental Health Perspectives (115) 308-312
Waste from agricultural livestock operations has been a long-standing concern with respect to contamination of water resources, particularly in terms of nutrient pollution. However, the recent growth of concentrated animal feeding operations (CAFOs) presents a greater risk to water quality because of both the increased volume of waste and to...
Whole-ecosystem study shows rapid fish-mercury response to changes in mercury deposition
R.C. Harris, J.W.M. Rudd, M. Amyot, Christopher L. Babiarz, K.G. Beaty, P.J. Blanchfield, R.A. Bodaly, B.A. Branfireun, C.C. Gilmour, J.A. Graydon, A. Heyes, H. Hintelmann, J.P. Hurley, C.A. Kelly, David P. Krabbenhoft, S.E. Lindberg, R.P. Mason, M.J. Paterson, C.L. Podemski, A. Robinson, K.A. Sandilands, G.R. Southworthn, Louis, Michael T. Tate
2007, Proceedings of the National Academy of Sciences of the United States of America (104) 16586-16591
Methylmercury contamination of fisheries from centuries of industrial atmospheric emissions negatively impacts humans and wild-life worldwide. The response of fish methylmercury concentrations to changes in mercury deposition has been difficult to establish because sediments/soils contain large pools of historical contamination, and many factors in addition to deposition affect fish mercury....
Diel changes in water chemistry in an arsenic-rich stream and treatment-pond system
C.H. Gammons, T.M. Grant, David A. Nimick, S.R. Parker, M.D. DeGrandpre
2007, Science of the Total Environment (384) 433-451
Arsenic concentrations are elevated in surface waters of the Warm Springs Ponds Operable Unit (WSPOU), located at the head of the upper Clark Fork River Superfund site, Montana, USA. Arsenic is derived from historical deposition of smelter emissions (Mill and Willow Creeks) and historical mining and milling wastes (Silver Bow...
Chronic toxicity of copper and ammonia to juvenile freshwater mussels (Unionidae)
N. Wang, C.G. Ingersoll, I.E. Greer, D.K. Hardesty, C.D. Ivey, J.L. Kunz, W. G. Brumbaugh, F.J. Dwyer, A.D. Roberts, T. Augspurger, C.M. Kane, R. J. Neves, M.C. Barnhart
2007, Environmental Toxicology and Chemistry (26) 2048-2056
The objectives of the present study were to develop methods for conducting chronic toxicity tests with juvenile mussels under flow-through conditions and to determine the chronic toxicity of copper and ammonia to juvenile mussels using these methods. In two feeding tests, two-month-old fatmucket (Lampsilis siliquoidea) and rainbow mussel (Villosa iris)...
Effects of aquaculture production noise on hearing, growth, and disease resistance of rainbow trout Oncorhynchus mykiss
L.E. Wysocki, J. W. Davidson III, M.E. Smith, A.S. Frankel, W.T. Ellison, P. M. Mazik, A.N. Popper, J. Bebak
2007, Aquaculture (272) 687-697
Intensive aquaculture production often utilizes equipment (e.g., aerators, air and water pumps, harvesters, blowers, filtration systems, and maintenance machinery) that increases noise levels in fish culture tanks. Consequently, chronic exposure to elevated noise levels in tanks could negatively impact cultured species. Possible effects include impairment of the auditory system, increased...
Landscape controls on mercury in streamwater at Acadia National Park, USA
J.M. Peckenham, J. S. Kahl, S.J. Nelson, K.B. Johnson, T.A. Haines
2007, Environmental Monitoring and Assessment (126) 97-104
Fall and spring streamwater samples were analyzed for total mercury (Hg) and major ions from 47 locations on Mount Desert Island in Maine. Samples were collected in zones that were burned in a major wildfire in 1947 and in zones that were not burned. We hypothesized that Hg concentrations in...
Characterization of low-pathogenicity H5N1 avian influenza viruses from North America
Erica Spackman, D. E. Swayne, D. L. Suarez, D. A. Senne, J. C. Pedersen, M. L. Killian, J. Pasick, K. Handel, Segaran Pillai, C. #NAME? Lee, D. Stallknecht, R. Slemons, Hon S. Ip, T. Deliberto
2007, Journal of Virology (81) 11612-11619
Wild-bird surveillance in North America for avian influenza (AI) viruses with a goal of early identification of the Asian H5N1 highly pathogenic AI virus has identified at least six low-pathogenicity H5N1 AI viruses between 2004 and 2006. The hemagglutinin (HA) and neuraminidase (NA) genes from all 6 H5N1 viruses and...
Origins of thiadiamondoids and diamondoidthiols in petroleum
Z. Wei, J.M. Moldowan, F. Fago, J.E. Dahl, C. Cai, K. E. Peters
2007, Energy and Fuels (21) 3431-3436
Thiadiamondoids and diamondoidthiols are orders of magnitude more abundant in oil altered by thermochemical sulfate reduction (TSR) than they are in nonaltered oil. This suggests that thiadiamondoids and diamondoidthiols form during TSR. In order to prove this hypothesis, we perform laboratory...
Prevalence and distribution of pox-like lesions, avian malaria, and mosquito vectors in Kipahulu valley, Haleakala National Park, Hawai'i, USA
Samuel Aruch, Carter T. Atkinson, Amy F. Savage, Dennis LaPointe
2007, Journal of Wildlife Diseases (43) 567-575
We determined prevalence and altitudinal distribution of introduced avian malarial infections (Plasmodium relictum) and pox-like lesions (Avipoxvirus) in forest birds from Kīpahulu Valley, Haleakalā National Park, on the island of Maui, and we identified primary larval habitat for the mosquito vector of this disease. This intensively managed wilderness area and...
Role of sediment resuspension in the remobilization of particulate-phase metals from coastal sediments
Linda H. Kalnejais, William R. Martin, Richard P. Signell, Michael H. Bothner
2007, Environmental Science & Technology (41) 2282-2288
The release of particulate-phase trace metals due to sediment resuspension has been investigated by combining erosion chamber experiments that apply a range of shear stresses typically encountered in coastal environments with a shear stress record simulated by a hydrodynamic model. Two sites with contrasting sediment chemistry were investigated. Sediment particles...
USGS advances in integrated, high-resolution sea-floor mapping: inner continental shelf to estuaries
J. F. Denny, W. C. Schwab, D.C. Twichell, T.F. O’Brien, W. W. Danforth, D.S. Foster, E. Bergeron, C.W. Worley, B.J. Irwin, B. Butman, P. C. Valentine, W. E. Baldwin, R.A. Morton, E.R. Thieler, D.R. Nichols, B.D. Andrews
2007, Conference Paper, Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
The U.S. Geological Survey (USGS) has been involved in geological mapping of the sea floor for the past thirty years. Early geophysical and acoustic mapping efforts using GLORIA (Geologic LOng Range Inclined ASDIC) a long-range sidescan-sonar system, provided broad-scale imagery of deep waters within the U.S. Exclusive Economic Zone (EEZ)....
Hindcasting potential hurricane impacts on rapidly changing barrier islands
H.F. Stockdon, D.M. Thompson, A. H. Sallenger Jr.
2007, Conference Paper, Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Hindcasts of the coastal impact of Hurricane Ivan on Santa Rosa Island, Florida, using a storm-impact scaling model that compares hurricane-induced water levels to local dune morphology, were found to have an accuracy of 68% in predicting the occurrence of one of four impact regimes: swash, collision, overwash, and inundation....
Responses to riparian restoration in the Spring Creek watershed, Central Pennsylvania
R.F. Carline, M.C. Walsh
2007, Restoration Ecology (15) 731-742
Riparian treatments, consisting of 3- to 4-m buffer strips, stream bank stabilization, and rock-lined stream crossings, were installed in two streams with livestock grazing to reduce sediment loading and stream bank erosion. Cedar Run and Slab Cabin Run, the treatment streams, and Spring Creek, an adjacent reference stream without riparian...
Role of aquifer heterogeneity in fresh groundwater discharge and seawater recycling: An example from the Carmel coast, Israel
Y. Weinstein, W. C. Burnett, P.W. Swarzenski, Y. Shalem, Y. Yechieli, B. Herut
2007, Journal of Geophysical Research C: Oceans (112)
A case study is shown in which the pattern of submarine groundwater discharge and of seawater recycling is controlled by local hydrogeological variability. The coastal aquifer in Dor Bay is composed of two units: a partly confined calcaranitic sandstone (Kurkar) and an overlying loose sand. Groundwater in the Kurkar has...
Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas
M.A. Townsend, S.A. Macko
2007, Current Research in Earth Sciences (253)
Increasing nitrate-N in ground water is a problem in areas with limited ground-water supplies, such as central Kansas. Nitrate-N concentrations in ground water in the study area in Ellis County range from 0.9 to 26 mg/L. Calculated mean values observed in soil cores are 1.2-15 mg/kg. The ??15N signatures of...
Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes
J.K. Nielsen, S. James Taggart, Thomas C. Shirley, Jennifer Mondragon
2007, ICES Journal of Marine Science (64) 1772-1784
A systematic pot survey in Glacier Bay, Alaska, was conducted to characterize the spatial distribution of juvenile and adult female Tanner crabs, and their association with depth and temperature. The information was used to infer important recruitment processes for Tanner crabs in glaciated ecosystems. High-catch areas for juvenile and adult...
Restoration of waterbird habitats in Chesapeake Bay: Great expectations or Sisyphus revisited?
R.M. Erwin, R.A. Beck
2007, Waterbirds (30) 163-176
In the past half century, many waterbird populations in Chesapeake Bay have declined or shifted ranges, indicating major ecological changes have occurred. While many studies have focused on the problems associated with environmental degradation such as the losses of coastal wetlands and submerged vegetation, a number of restoration efforts have...
Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem
P.W. Swarzenski, S. Kruse, C. Reich, W.V. Swarzenski
2007, Conference Paper
It has been well established that fresh or brackish groundwater can exist both near and far from shore in many coastal and marine environments. The often permeable nature of marine sediments and the underlying bedrock provides abundant pathways for submarine groundwater discharge. While submarine groundwater discharge as a coastal hydrogeological...
Hydrogeologic controls on nitrate transport in a small agricultural catchment, Iowa
K. E. Schilling, M.D. Tomer, Y.-K. Zhang, T. Weisbrod, P. Jacobson, C.A. Cambardella
2007, Journal of Geophysical Research G: Biogeosciences (112)
Effects of subsurface deposits on nitrate loss in stream riparian zones are recognized, but little attention has been focused on similar processes occurring in upland agricultural settings. In this paper, we evaluated hydrogeologic controls on nitrate transport processes occurring in a small 7.6 ha Iowa catchment. Subsurface deposits in the...
