Flow over bedforms in a large sand-bed river: A field investigation
Robert R. Holmes Jr., Marcelo H. Garcia
2008, Journal of Hydraulic Research (46) 322-333
An experimental field study of flows over bedforms was conducted on the Missouri River near St. Charles, Missouri. Detailed velocity data were collected under two different flow conditions along bedforms in this sand-bed river. The large river-scale data reflect flow characteristics similar to those of laboratory-scale flows, with flow separation...
Nutrient-reserve dynamics during egg production by female Greater Scaup (Aythya marila): Relationships with timing of reproduction
Kristen B. Gorman, Daniel Esler, Paul L. Flint, Tony D. Williams
2008, The Auk (125) 384-394
We studied nutrient-reserve dynamics of female Greater Scaup (Aythya marila) to quantify intraspecific strategies of nutrient acquisition for egg production, particularly in relation to the seasonal timing of reproduction (i.e., date of initiation of rapid follicle growth [RFG]). We collected female Greater Scaup on the Yukon-Kuskokwim Delta, Alaska, from arrival...
The 1906 San Francisco earthquake a century later: Introduction to the special section
Brad T. Aagaard, Gregory C. Beroza
2008, Bulletin of the Seismological Society of America (98) 817-822
The great 1906 San Francisco earthquake is perhaps the landmark event in the history of earthquake science. It began with a foreshock at 5:12 a.m. local time in the morning of 18 April 1906. Some 30 sec later, the main event initiated on the San Andreas fault, just off the San Francisco...
Reovirus associated with mortality of an Upland Sandpiper
Brett K. Sandercock, Ashley E. Casey, D. Earl Green, S. Ip, Kathryn A. Converse
2008, Wader Study Group Bulletin (115) 55-56
No abstract available....
Analysis of Dissolved Selenium Loading for Selected Sites in the Lower Gunnison River Basin, Colorado, 1978-2005
Judith C. Thomas, Kenneth J. Leib, John W. Mayo
2008, Scientific Investigations Report 2007-5287
Elevated selenium concentrations in streams are a water-quality concern in western Colorado. The U.S. Geologic Survey, in cooperation with the Colorado Department of Public Health and Environment, summarized selenium loading in the Lower Gunnison River Basin to support the development of total maximum daily selenium loads at sites that represent...
Soil erosion: data say C sink
J.W. Harden, A.A. Berhe, M.S. Torn, J.J. Harte, Shu-Guang Liu, Robert F. Stallard
2008, Science (320) 178-179
No abstract available....
A multiscale analysis of nest predation on Least Bell's Vireos (Vireo bellii pusillus)
Barbara E. Kus, Bonnie L. Peterson, Douglas H. Deutschman
2008, The Auk (125) 277-284
We examined variables influencing nest predation on the endangered Least Bell's Vireo (Vireo bellii pusillus) at three spatial scales to determine what nest-site, habitat, or landscape characteristics affect the likelihood of nest predation and to determine the spatial distribution of predation risk and the variables influencing it. We used MARK...
Climate change and coastal vulnerability assessment: Scenarios for integrated assessment
Robert J. Nicholls, Poh Poh Wong, Virginia Burkett, Colin D. Woodroffe, John Hay
2008, Sustainability Science (3) 89-102
Coastal vulnerability assessments still focus mainly on sea-level rise, with less attention paid to other dimensions of climate change. The influence of non-climatic environmental change or socio-economic change is even less considered, and is often completely ignored. Given that the profound coastal changes of the twentieth century are likely to...
National Wildlife Health Center's quarterly wildlife mortality report
Mark Jankowski, Krysten Schuler, Jennifer Bradsby
2008, Wildlife Disease Association Newsletter 9-15
No abstract available....
Key water issues now facing our nation
Robert M. Hirsch, Timothy L. Miller, Pixie A. Hamilton, Robert J. Gilliom
2008, AWRA Water Blog
Challenges to sustaining sufficient and high-quality water for human consumption, industry, farms, energy production, and ecosystem services continue to intensify in many parts of the Nation. We face four key water issues that call for support from the science and engineering communities....
Understanding and predicting ecological dynamics: Are major surprises inevitable
Daniel F. Doak, James A. Estes, Benjamin S. Halpern, Ute Jacob, D. R. Lindberg, James R. Lovvorn, Daniel H. Monson, M. Tim Tinker, Terrie M. Williams, J. Timothy Wootton, Ian Carroll, Mark Emmerson, Fiorenza Micheli, Mark Novak
2008, Ecology (89) 952-961
Ecological surprises, substantial and unanticipated changes in the abundance of one or more species that result from previously unsuspected processes, are a common outcome of both experiments and observations in community and population ecology. Here, we give examples of such surprises along with the results of a survey of well-established...
White sturgeon mitigation and restoration in the Columbia and Snake rivers upstream from Bonneville Dam, Annual Progress Report April 2006 - March 2007. Report C
M.J. Parsley, P. Kofoot
2008, Report, White Sturgeon mitigation and restoration in the Columbia and Snake Rivers upstream from Bonneville dam
Describe reproduction and early life history characteristics of white sturgeon populations in the Columbia River between Bonneville and Priest Rapids dams. Define habitat requirements for spawning and rearing white sturgeon and quantify the extent of habitat available in the Columbia River between Bonneville and Priest Rapids dams. Progress updates on...
The myth of plant species saturation
Thomas J. Stohlgren, David T. Barnett, Catherine S. Jarnevich, Curtis Flather, John Kartesz
2008, Ecology Letters (11) 313-322
Plant species assemblages, communities or regional floras might be termed ‘saturated’ when additional immigrant species are unsuccessful at establishing due to competitive exclusion or other inter-specific interactions, or when the immigration of species is off-set by extirpation of species. This is clearly not the case for state, regional or national...
Landsat still contributing to environmental research
Thomas R. Loveland, Mark A. Cochrane, Geoffrey M. Henebry
2008, Trends in Ecology and Evolution (23) 182-183
Landsat data have enabled continuous global monitoring of both human-caused and other land cover disturbances since 1972. Recently degraded performance and intermittent service of the Landsat 7 and Landsat 5 sensors, respectively, have raised concerns about the condition of global Earth observation programs. However, Landsat imagery is still useful for...
Development of the water-analysis screening tool used in the initial screening for the Pennsylvania State Water Plan update of 2008
Marla H. Stuckey
2008, Open-File Report 2008-1106
The Water Resources Planning Act, Act 220 of 2002, requires the Pennsylvania Department of Environmental Protection (PaDEP) to update the State Water Plan by 2008. As part of this update, a water-analysis screening tool (WAST) was developed by the U.S. Geological Survey, in cooperation with the PaDEP, to provide assistance...
Ground-water-flow modeling of a freshwater and brine-filled aquifer in the Onondaga Trough, Onondaga County, New York: A summary of findings
William M. Kappel, Richard M. Yager
2008, Open-File Report 2007-1409
In 2007, the U.S. Geological Survey (USGS) completed a hydrogeologic study that included the development of a groundwater-flow model of the glacial-drift aquifer in the Onondaga Trough near Syracuse, N.Y., which extends from the Valley Heads Moraine near Tully, N.Y., to Onondaga Lake (fig. 1). Glacial sediments within the Onondaga...
Estimation of Constituent Concentrations, Loads, and Yields in Streams of Johnson County, Northeast Kansas, Using Continuous Water-Quality Monitoring and Regression Models, October 2002 through December 2006
Teresa J. Rasmussen, Casey J. Lee, Andrew C. Ziegler
2008, Scientific Investigations Report 2008-5014
Johnson County is one of the most rapidly developing counties in Kansas. Population growth and expanding urban land use affect the quality of county streams, which are important for human and environmental health, water supply, recreation, and aesthetic value. This report describes estimates of streamflow and constituent concentrations, loads, and...
Continuous water-quality monitoring of streams in Johnson County, Kansas 2002-06
Teresa J. Rasmussen, Casey J. Lee, Andrew C. Ziegler
2008, Fact Sheet 2008-3007
Water quality in Johnson County, Kansas was characterized on the basis of continuous, in-stream monitoring. The results summarized in this fact sheet may be used to better understand concentration and load variability during changing seasonal and streamflow conditions and to assess water-quality conditions relative to water-quality standards and management goals....
Mid-Cenozoic tectonic and paleoenvironmental setting of the central Arctic Ocean
M. O’Regan, K. Moran, J. Backman, M. Jakobsson, F. Sangiorgi, Henk Brinkhuis, Rob Pockalny, Alasdair Skelton, Catherine E. Stickley, N. Koc, Hans-Juergen Brumsack, Debra A. Willard
2008, Paleoceanography (23) 1-15
Drilling results from the Integrated Ocean Drilling Program's Arctic Coring Expedition (ACEX) to the Lomonosov Ridge (LR) document a 26 million year hiatus that separates freshwater-influenced biosilica-rich deposits of the middle Eocene from fossil-poor glaciomarine silty clays of the early Miocene. Detailed micropaleontological and sedimentological data from sediments surrounding this...
Reproductive disruption in fish downstream from an estrogenic wastewater effluent
A.M. Vajda, Larry B. Barber, James L. Gray, E.M. Lopez, John D. Woodling, David O. Norris
2008, Environmental Science & Technology (42) 3407-3414
To assess the impact of an estrogenic wastewater treatment plant (WWTP) effluent on fish reproduction, white suckers (Catostomus commersoni) were collected from immediately upstream and downstream (effluent site) of the city of Boulder, CO, WWTP outfall. Gonadal intersex, altered sex ratios, reduced gonad size, disrupted ovarian and...
Mid-Pliocene Planktic Foraminifer Census Data from Ocean Drilling Program Hole 1237C
Rocio Caballero, Harry Dowsett
2008, Data Series 336
INTRODUCTION The U.S. Geological Survey is conducting a long-term study of mid-Pliocene climatic and oceanographic conditions. One of the key elements of the study involves the use of quantitative composition of planktic foraminifer assemblages in conjunction with other proxies to constrain estimates of sea-surface temperature (SST) and to identify major oceanographic...
Geophysical characterization of the American River levees, Sacramento, California, with electromagnetics, capacitively coupled resistivity, and DC resistivity
Theodore H. Asch, Maria Deszcz-Pan, Bethany L. Burton, Lyndsay B. Ball
2008, Open-File Report 2008-1109
A geophysical characterization of a portion of American River levees in Sacramento, California was conducted in May, 2007. Targets of interest included the distribution and thickness of sand lenses that underlie the levees and the depth to a clay unit that underlies the sand. The concern is that the...
Questa baseline and pre-mining ground-water quality investigation 22 — Groundwater budget for the Straight Creek drainage basin, Red River Valley, New Mexico, with a section on Sulphur Gulch water budget
Douglas P. McAda, Cheryl A. Naus
2008, Scientific Investigations Report 2007-5149
In April 2001, the U.S. Geological Survey (USGS) and the New Mexico Environment Department (NMED) began a cooperative study to infer the pre-mining ground-water chemistry at the Molycorp molybdenum mine site in the Red River Valley. The Molycorp mine has been in operation since the 1920s. Because ground-water conditions prior...
Water quality
Samuel N. Luoma, Susan Anderson, Brian A. Bergamaschi, Lisa Holm, Cathy Ruhl, David H. Schoellhamer, Robin Stewart
2008, Book chapter, The state of bay-Delta science, 2008
Sustainable water policy in California will require maintaining or improving water quality. The Delta is an important source of drinking water for Californians, but sustaining a quality sufficient for human and agricultural consumption presents a number of problems and challenges to water managers. Similarly, poor environmental water quality is recognized as one of the...
Making non-digitally-recorded seismograms accessible online for studying earthquakes
W.H.K. Lee, R. Benson
2008, Book chapter, Historical seismology: Modern approaches in solid earth sciences
No abstract available....
