Spatial patterns in assemblage structures of pelagic forage fish and zooplankton in western Lake Superior
Timothy B. Johnson, Michael H. Hoff, Anett S. Trebitz, Charles R. Bronte, Timothy D. Corry, James F. Kitchell, Stephen J. Lozano, Doran M. Mason, Jill V. Scharold, Stephen T. Schram, Donald R. Schreiner
2004, Journal of Great Lakes Research (30) 395-406
We assessed abundance, size, and species composition of forage fish and zooplankton communities of western Lake Superior during August 1996 and July 1997. Data were analyzed for three ecoregions (Duluth-Superior, Apostle Islands, and the open lake) differing in bathymetry and limnological and biological patterns. Zooplankton abundance was three times higher...
Reconstructing paleo lake levels from relict shorelines along the Upper Great Lakes
Steve J. Baedke, Todd A. Thompson, John W. Johnston, Douglas A. Wilcox
2004, Aquatic Ecosystem Health & Management (7) 435-449
Shorelines of the upper Great Lakes include many embayments that contain strandplains of beach ridges. These former shoreline positions of the lakes can be used to determine changes in the elevation of the lakes through time, and they also provide information on the warping of the ground surface that...
A Holocene history of dune-mediated landscape change along the southeastern shore of Lake Superior
Walter L. Loope, Timothy G. Fisher, Harry M. Jol, John B. Anderton, William L. Blewett
2004, Geomorphology (61) 303-322
Causal links that connect Holocene high stands of Lake Superior with dune building, stream damming and diversion and reservoir impoundment and infilling are inferred from a multidisciplinary investigation of a small watershed along the SE shore of Lake Superior. Radiocarbon ages of wood fragments from in-place stumps and soil O...
Use of PRD1 bacteriophage in groundwater viral transport, inactivation, and attachment studies
Ronald W. Harvey, Joseph N. Ryan
2004, FEMS Microbiology Ecology (49) 3-16
PRD1, an icosahedra-shaped, 62 nm (diameter), double-stranded DNA bacteriophage with an internal membrane, has emerged as an important model virus for studying the manner in which microorganisms are transported through a variety of groundwater environments. The popularity of this phage for use in transport studies involving geologic media is due,...
Status of lake trout rehabilitation on Six Fathom Bank and Yankee Reef in Lake Huron
Charles P. Madenjian, Timothy J. Desorcie, Jerry R. McClain, Aaron P. Woldt, Jeffrey D. Holuszko, Charles A. Bowen II
2004, North American Journal of Fisheries Management (24) 1003-1016
Six Fathom Bank, an offshore reef in the central region of Lake Huron's main basin, was stocked annually with hatchery-reared lake trout Salvelinus namaycush during 1985–1998, and nearby Yankee Reef was stocked with hatchery-reared lake trout in 1992, 1997, and annually during 1999–2001. We conducted gill-net surveys during spring and fall to...
Habitat selection by two species of burrowing mayfly nymphs in the Les Cheneaux Islands region of northern Lake Huron
Marc A. Blouin, Patrick Hudson, Margret Chriscinske
2004, Journal of Freshwater Ecology (19) 507-514
This study focused primarily on the habitat preferences of Hexagenia limbata andEphemera simulans, two species prevalent in northern Lake Huron, to gain a better understanding of the key components that determined their distribution and abundance. Both species preferred habitats based upon depth and sediment type. In addition, the burrowing activity of H. limbata was...
Hydraulic and geochemical framework of the Idaho National Engineering and Environmental Laboratory vadose zone
John R. Nimmo, Joseph P. Rousseau, Kim S. Perkins, Kenneth G. Stollenwerk, Pierre D. Glynn, Roy C. Bartholomay, LeRoy L. Knobel
2004, Vadose Zone Journal (3) 6-34
Questions of major importance for subsurface contaminant transport at the Idaho National Engineering and Environmental Laboratory (INEEL) include (i) travel times to the aquifer, both average or typical values and the range of values to be expected, and (ii) modes of contaminant transport, especially sorption processes. The hydraulic and geochemical...
Importance of clay size minerals for Fe(III) respiration in a petroleum-contaminated aquifer
Evgenya S. Shelobolina, Robert T. Anderson, Yury N. Vodyanitskii, Anatolii V. Sivtsov, Richard Yuretich, Derek R. Lovely
2004, Geobiology (2) 67-76
The availability of Fe(III)-bearing minerals for dissimilatory Fe(III) reduction was evaluated in sediments from a petroleum-contaminated sandy aquifer near Bemidji, Minnesota (USA). First, the sediments from a contaminated area of the aquifer, in which Fe(III) reduction was the predominant terminal electron accepting process, were compared with sediments from a nearby,...
Comparison of 13 equations for determining evapotranspiration from a prairie wetland, Cottonwood Lake Area, North Dakota, USA
Donald O. Rosenberry, David L. Stannard, Thomas C. Winter, Margo L. Martinez
2004, Wetlands (24) 483-497
Evapotranspiration determined using the energy-budget method at a semi-permanent prairie-pothole wetland in east-central North Dakota, USA was compared with 12 other commonly used methods. The Priestley-Taylor and deBruin-Keijman methods compared best with the energy-budget values; mean differences were less than 0.1 mm d−1, and standard deviations were less than 0.3...
Uranium mill tailings: Nuclear waste and natural laboratory for geochemical and radioecological investigations
Edward R. Landa
2004, Journal of Environmental Radioactivity (77) 1-27
Uranium mill tailings (UMT) are a high volume, low specific activity radioactive waste typically disposed in surface impoundments. This review focuses on research on UMT and related earth materials during the past decade relevant to the assessment of: (1) mineral hosts of radionuclides; (2) the use of soil analogs in...
Object-based inversion of crosswell radar tomography data to monitor vegetable oil injection experiments
John W. Lane Jr., Frederick D. Day-Lewis, Roelof J. Versteeg, Clifton C. Casey
2004, Journal of Environmental & Engineering Geophysics (9) 63-77
Crosswell radar methods can be used to dynamically image ground-water flow and mass transport associated with tracer tests, hydraulic tests, and natural physical processes, for improved characterization of preferential flow paths and complex aquifer heterogeneity. Unfortunately, because the raypath coverage of the interwell region is limited by the borehole...
Population demographics, survival, and reporduction: Alaska sea otter research
Daniel H. Monson, James L. Bodkin, D.F. Doak, James A. Estes, M. T. Tinker, D.B. Siniff
Daniela Maldini, Donald Calkins, Shannon Atkinson, Rosa Meehan, editor(s)
2004, Conference Paper, Alaska sea otter research workshop: Addressing the decline of the southwestern Alaska sea otter population
The fundamental force behind population change is the balance between age-specific survival and reproductive rates. Thus, understanding population demographics is crucial when trying to interpret trends in population change over time. For many species, demographic rates change as the population’s status (i.e., relative to prey resources) varies. Indices of body...
Sea otter research methods and tools
James L. Bodkin
Daniela Maldini, Donald Calkins, Shannon Atkinson, Rosa Meehan, editor(s)
2004, Conference Paper, Alaska Sea Otter Research Workshop: Addressing the Decline of the Southwestern Alaska Sea Otter Population
Sea otters possess physical characteristics and life history attributes that provide both opportunity and constraint to their study. Because of their relatively limited diving ability they occur in nearshore marine habitats that are usually viewable from shore, allowing direct observation of most behaviors. Because sea otters live nearshore and forage...
Status of sea otter populations in southcentral and southeast Alaska, 2002-2003
James L. Bodkin
Daniela Maldini, Donald Calkins, Shannon Atkinson, Rosa Meehan, editor(s)
2004, Conference Paper, Alaska Sea Otter Research Workshop: Addressing the Decline of the Southwestern Alaska Sea Otter Population
During the years 2002-2004 estimated sea otter population sizes were calculated for Southeast Alaska, Prince William Sound, and the Kenai Peninsula and Cook Inlet regions of Alaska. Aerial surveys were conducted by a single observer from a float-equipped Bellanca Scout fixed-wing aircraft flying at 91 m altitude and 65 mph....
Studying sea otter foraging ecology: A review of some methodological approaches
M. T. Tinker, J. A. Estes, James L. Bodkin, M. M. Staedler, Daniel H. Monson
Daniela Maldini, Donald Calkins, Shannon Atkinson, Rosa Meehan, editor(s)
2004, Conference Paper, Alaska Sea Otter Research Workshop: Addressing the Decline of the Southwestern Alaska Sea Otter Population
The study of foraging ecology plays a central role in our understanding of animal populations and natural communities, and can also provide information necessary for the effective conservation of rare or endangered species. Sea otter researchers are interested in foraging ecology for many different reasons, but for heuristic purposes we...
Precise relocation of earthquakes following the 15 June 1991 eruption of Mount Pinatubo (Philippines)
J. Battaglia, C.H. Thurber, J.-L. Got, C.A. Rowe, R.A. White
2004, Journal of Geophysical Research B: Solid Earth (109)
The 15 June 1991 climactic eruption of Mount Pinatubo (Philippines) was followed by intense seismicity that remained at a high level for several months. We located 10,839 events recorded between 1 July and mid-December 1991. In contrast to the preeruptive seismicity which was focused in two groups below the summit...
A molecular comparison of Alaskan and North East Atlantic Halicondria panicea (Pallas 1766) (Porifera: Demospongiae)
Dirk Erpenbeck, Anne L. Knowlton, Sandra L. Talbot, Ray C. Highsmith, Rob W.M. van Soest
2004, Conference Paper, Sponge science in the new millennium: Papers contributed to the VI International Sponge Conference, Rapallo, Italy, 29th September - 5th October 2002
The intraspecific relationships between populations of Alaskan Halichondria cf. panicea are the subjects of ongoing research. In this study we compare CO1 sequences of Alaskan Halichondria cf. panicea with North East Atlantic Halichondria panicea and its sister species Halichondria bowerbanki. Alaskan Halichondria cf. panicea form a well-supported sister group to...
Plume-scale testing of a simplified method for detecting tritium contamination in plants and soil
Brian J. Andraski, Keith J. Halford, Robert L. Michel
2004, Conference Paper, Proceedings, Workshop on long-term performance monitoring of metals and radionuclides in the subsurface
Cost-effective methods are needed to detect contamination near radioactive-waste and other contaminated sites. Such methods should be capable of providing an early warning of contaminant releases and should be accurate and robust enough for assessing the long-term performance of waste-isolation facilities and remediation measures. Recently, a simplified method for detecting...
Variable breeding phenology affects the exposure of amphibian embryos to ultraviolet radiation: Reply
Paul Stephen Corn, Erin Muths
2004, Ecology (85) 1759-1763
Corn and Muths (2002) describe how seasonal and annual variation in estimated flux of ultraviolet-B (UV-B) radiation, combined with year-to-year variation in amphibian breeding, phenology, introduces considerable variability in the UV-B exposures to amphibians. The response to our paper by Blaustein et al. (2004) misstates the objective and conclusions of...
New U-series dates at the Caune de l'Arago, France
Christophe Falgueres, Y. Yokoyama, G. Shen, James L. Bischoff, T.-L. Ku, Henry de Lumley
2004, Journal of Archaeological Science (31) 941-952
In the beginning of the 1980s, the Caune de l'Arago was the focus of an interdisciplinary effort to establish the chronology of the Homo heidelbergensis (Preneandertals) fossils using a variety of techniques on bones and on speleothems. The result was a very large spread of dates particularly on bone samples....
Gene flow and genetic characterization of Northern Goshawks breeding in Utah
Sarah A. Sonsthagen, Sandra L. Talbot, C.M. White
2004, Condor (106) 826-836
Adult movement and natal dispersal data demonstrate that Northern Goshawks (Accipiter gentilis) are able to travel over long distances, suggesting a large functional population. However, these data are unable to determine whether these movements contribute to gene flow among adjacent breeding areas. We used eight microsatellite DNA loci and mitochondrial...
Precarious rock and overturned transformer evidence for ground shaking in the Ms 7.7 Kern County earthquake: An analog for disastrous shaking from a major thrust fault in the Los Angeles basin
J.N. Brune, A. Anooshehpoor, B. Shi, Yen Zheng
2004, Bulletin of the Seismological Society of America (94) 1993-2003
Precariously balanced rocks and overturned transformers in the vicinity of the White Wolf fault provide constraints on ground motion during the 1952 Ms 7.7 Kern County earthquake, a possible analog for an anticipated large earthquake in the Los Angeles basin (Shaw et al., 2002; Dolan et al., 2003). On the...
Improving wetland simulations by including heat transport in groundwater flow modeling
Hector R. Bravo, F. Jiang, R. J. Hunt
2004, Conference Paper, Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships
A procedure was developed to automatically calibrate a groundwater flow and heat transport model, resulting in the estimation of hydraulic conductivity and flux across the water table in wetland systems. This paper describes differences between previous approaches and this study, and summarizes some challenges in the method implementation. The procedure...
Density dependence and risk of extinction in a small population of sea otters
L.R. Gerber, K.E. Buenau, G. VanBlaricom
2004, Biodiversity and Conservation (13) 2741-2757
Sea otters (Enhydra lutris (L.)) were hunted to extinction off the coast of Washington State early in the 20th century. A new population was established by translocations from Alaska in 1969 and 1970. The population, currently numbering at least 550 animals, A major threat to the population is the ongoing...
Clearwater local scour experiments in a large flume
D.M. Sheppard, M. Odeh, A. Pritsivelis, T. Glasser
2004, Conference Paper, Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships
Local sediment scour experiments have been conducted with 0.114 m, 0.305 m and 0.914 m diameter circular piles in a 6.1 m (20 ft) wide by 6.4 m (21 ft) deep by 38.4 m (126 ft) long flume in the Hydraulics Laboratory at the USGS Conte Laboratory in Turners Falls,...
