Biomonitoring in the Boulder River watershed, Montana, USA: metal concentrations in biofilm and macroinvertebrates, and relations with macroinvertebrate assemblage
D.T. Rhea, D.D. Harper, A.M. Farag, W. G. Brumbaugh
2006, Environmental Monitoring and Assessment (115) 381-393
Portions of the Boulder River watershed contain elevated concentrations of arsenic, cadmium, copper, lead, and zinc in water, sediment, and biota. We measured concentrations of As, Cd, Cu, Pb, and Zn in biofilm and macroinvertebrates, and assessed macroinvertebrate assemblage and aquatic habitat with the objective of monitoring planned remediation...
Aquifer composition and the tendency toward scale-deposit formation during reverse osmosis desalination - Examples from saline ground water in New Mexico, USA
G. F. Huff
2006, Desalination (190) 235-242
Desalination is expected to make a substantial contribution to water supply in the United States by 2020. Currently, reverse osmosis is one of the most cost effective and widely used desalination technologies. The tendency to form scale deposits during reverse osmosis is an important factor in determining the suitability of...
Mineralogical anomalies and their influences on elemental geochemistry of the main workable coal beds from the Dafang Coalfield, Guizhou, China
S. Dai, D. Ren, D. Li, C. L. Chou, K. Luo
2006, Acta Geologica Sinica (80) 589-597
Mineralogy and geochemistry of the No. 11 Coal bed were investigated by using inductively-coupled plasma mass spectrometry (ICP-MS), X-ray fluorescence (XRF), scanning electron microscopy equipped with energy-dispersive X-ray (SEM-EDX), sequential chemical extraction procedure (SCEP), and optical microscopy. The results show that the No. 11 Coal bed has very high contents...
Simple equations guide high-frequency surface-wave investigation techniques
J. Xia, Y. Xu, C. Chen, R.D. Kaufmann, Y. Luo
2006, Soil Dynamics and Earthquake Engineering (26) 395-403
We discuss five useful equations related to high-frequency surface-wave techniques and their implications in practice. These equations are theoretical results from published literature regarding source selection, data-acquisition parameters, resolution of a dispersion curve image in the frequency-velocity domain, and the cut-off frequency of high modes. The first equation suggests Rayleigh...
Arsenic and selenium in microbial metabolism
John F. Stolz, Partha Basu, Joanne M. Santini, Ronald S. Oremland
2006, Annual Review of Microbiology (60) 107-130
Arsenic and selenium are readily metabolized by prokaryotes, participating in a full range of metabolic functions including assimilation, methylation, detoxification, and anaerobic respiration. Arsenic speciation and mobility is affected by microbes through oxidation/reduction reactions as part of resistance and respiratory processes. A robust arsenic cycle has been demonstrated in diverse...
Timing of magmatism following initial convergence at a passive margin, southwestern U.S. Cordillera, and ages of lower crustal magma sources
A. P. Barth, J. L. Wooden
2006, Journal of Geology (114) 231-245
Initiation of the Cordilleran magmatic arc in the southwestern United States is marked by intrusion of granitic plutons, predominantly composed of alkali-calcic Fe- and Sr-enriched quartz monzodiorite and monzonite, that intruded Paleoproterozoic basement and its Paleozoic cratonal-miogeoclinal cover. Three intrusive suites, recognized on the basis of differences in high field...
Degradation of water quality by bird feces in and around managed wetlands
G.G. Shellenbarger, A.B. Boehm
2006, Conference Paper, Proceedings of the South Bay Science Symposium
No abstract available....
Deciphering igneous and metamorphic events in high-grade rocks of the Wilmington complex, Delaware: Morphology, cathodoluminescence and backscattered electron zoning, and SHRIMP U-Pb geochronology of zircon and monazite
J. N. Aleinikoff, W.S. Schenck, M.O. Plank, L.A. Srogi, C.M. Fanning, S.L. Kamo, H. Bosbyshell
2006, Geological Society of America Bulletin (118) 39-64
High-grade rocks of the Wilmington Complex, northern Delaware and adjacent Maryland and Pennsylvania, contain morphologically complex zircons that formed through both igneous and metamorphic processes during the development of an island-arc complex and suturing of the arc to Laurentia. The arc complex has been divided into several members, the protoliths...
Submarine geology of Hana Ridge and Haleakala Volcano's northeast flank, Maui
Barry W. Eakins, Joel E. Robinson
2006, Journal of Volcanology and Geothermal Research (151) 229-250
We present a morphostructural analysis of the submarine portions of Haleakala Volcano and environs, based upon a 4-year program of geophysical surveys and submersible explorations of the underwater flanks of Hawaiian volcanoes that was conducted by numerous academic and governmental research organizations in Japan and the U.S. and funded primarily...
Populations estimates of North American shorebirds, 2006
R.I. Guy Morrison, Brian J. McCaffery, Robert E. Gill Jr., Susan K. Skagen, Stephanie L. Jones, Gary W. Page, Cheri L. Gratto-Trevor, Brad A. Andres
2006, Wader Study Group Bulletin (111) 67-85
This paper provides updates on population estimates for 52 species of shorebirds, involving 75 taxa, occurring in North America. New information resulting in a changed estimate is available for 39 of the 75 taxa (52%), involving 24 increases and 15 decreases. The preponderance of increased estimates is likely the result...
Population dynamics of Greater Scaup breeding on the Yukon-Kuskokwim Delta, Alaska
Paul L. Flint, J. Barry Grand, Thomas F. Fondell, Julie A. Morse
2006, Wildlife Monographs (162) 1-22
Populations of greater scaup (Aythya marila) remained relatively stable during a period when populations of lesser scaup (A. affinis) have declined from historic levels. To assist in describing these differences in population trends, from 1991 through 2000, we studied the survival, nesting ecology, and productivity of greater scaup on the...
Hydroecological modeling of the Lower Missouri River
H.E. Johnson, R. B. Jacobson, A. J. DeLonay
2006, Conference Paper, Proceedings of the third federal interagency hydrologic modeling conference
No abstract avaikable ...
Intradaily variability of water quality in a shallow tidal lagoon: Mechanisms and implications
L.V. Lucas, D.M. Sereno, J.R. Burau, T.S. Schraga, C.B. Lopez, M.T. Stacey, K.V. Parchevsky, V.P. Parchevsky
2006, Estuaries and Coasts (29) 711-730
Although surface water quality and its underlying processes vary over time scales ranging from seconds to decades, they have historically been studied at the lower (weekly to interannual) frequencies. The aim of this study was to investigate intradaily variability of three water quality parameters in a small freshwater tidal...
A mid-holocene fauna from Bear Den Cave, Sequoia National Park, California
Jim I. Mead, Thomas W. McGinnis, Jon E. Keeley
2006, Bulletin, Southern California Academy of Sciences (105) 43-58
Test excavation of floor fill deposits in the first room in Bear Den Cave, Sequoia National Park, produced fossiliferous sediments down to at least 40 cm depth. Radiocarbon analysis of charcoal from this layer indicates an early-middle Holocene age of 7220 CAL BP. The fossil accumulation represents prey recovered from...
Red mangrove (Rhizophora mangle) reproduction and seedling colonization after Hurricane Charley: Comparisons of Charlotte Harbor and Tampa Bay
C.E. Proffitt, E.C. Milbrandt, S.E. Travis
2006, Estuaries and Coasts (29) 972-978
Reproductive aspects of life history are known to be important in recovery following disturbance in many plant species although this has not been well studied in mangroves. Hurricane Charley devastated large areas of mangroves in Charlotte Harbor, Florida, in August 2004. We surveyed 6 forests in Charlotte Harbor (2002, 2003,...
Incorporation of seawater into mid-ocean ridge lava flows during emplacement
S.A. Soule, D.J. Fornari, M.R. Perfit, W.I. Ridley, M.H. Reed, J.R. Cann
2006, Earth and Planetary Science Letters (252) 289-307
Evidence for the interaction between seawater and lava during emplacement on the deep seafloor can be observed in solidified flows at a variety of scales including rapid quenching of their outer crusts and the formation of lava pillars through the body of the flow. Recently, an additional interaction, incorporation of...
Dietary exposure of mink (Mustela vison) to fish from the Housatonic River, Berkshire County, Massachusetts, USA: Effects on reproduction, kit growth, and survival
S.J. Bursian, C. Sharma, R.J. Aulerich, B. Yamini, R.R. Mitchell, C.E. Orazio, D.R.J. Moore, S. Svirsky, D. E. Tillitt
2006, Environmental Toxicology and Chemistry (25) 1533-1540
We evaluated the effects of feeding farm-raised mink (Mustela vison) diets containing polychlorinated biphenyl (PCB)-contaminated fish from the Housatonic River (HR; Berkshire County, MA, USA) on adult reproductive performance and kit growth and survival. Diets contained 0.22-3.54% HR fish, providing 0.34-3.7 ??g total PCBs (TPCB)/g feed wet wt (3.5-68.5 pg...
Migration depths of juvenile Chinook salmon and steelhead relative to total dissolved gas supersaturation in a Columbia River reservoir
J.W. Beeman, A.G. Maule
2006, Transactions of the American Fisheries Society (135) 584-594
The in situ depths of juvenile salmonids Oncorhynchus spp. were studied to determine whether hydrostatic compensation was sufficient to protect them from gas bubble disease (GBD) during exposure to total dissolved gas (TDG) supersaturation from a regional program of spill at dams meant to improve salmonid passage survival. Yearling Chinook...
Fire severity and plant age in postfire resprouting of woody plants in sage scrub and chaparral
Jon E. Keeley
2006, Madroño (53) 373-379
Postfire resprouting by woody plants confers a marked advantage in rate of recovery over species that regenerate entirely from seed. However, the predictability of this advantage varies markedly between species, with some showing nearly 100% rootcrown survival and others often much lower. This study examined patterns of fire-caused mortality and...
Productivity of Black Oystercatchers: Effects of recreational disturbance in a National Park
J.A. Morse, A.N. Powell, M.D. Tetreau
2006, Condor (108) 623-633
National parks in Alaska are generally assumed to be high-quality, undisturbed wildlife habitats. However, these parks attract recreational users, whose presence may reduce the suitability of key habitats for nesting shorebirds. In Kenai Fjords National Park, Black Oystercatchers (Haematopus bachmani) often breed on gravel beaches that are also popular campsites....
Cross-calibration of A.M. constellation sensors for long term monitoring of land surface processes
D. Meyer, G. Chander
2006, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Data from multiple sensors must be used together to gain a more complete understanding of land surface processes at a variety of scales. Although higher-level products derived from different sensors (e.g., vegetation cover, albedo, surface temperature) can be validated independently, the degree to which these sensors and their products can...
Electrical resistance sensors record spring flow timing, Grand Canyon, Arizona
E.A. Adams, S. A. Monroe, Abraham E. Springer, K.W. Blasch, D. J. Bills
2006, Ground Water (44) 630-641
Springs along the south rim of the Grand Canyon, Arizona, are important ecological and cultural resources in Grand Canyon National Park and are discharge points for regional and local aquifers of the Coconino Plateau. This study evaluated the applicability of electrical resistance (ER) sensors for measuring diffuse, low-stage (<1.0 cm)...
Relations between climatic variability and hydrologic time series from four alluvial basins across the southwestern United States
R. T. Hanson, M. D. Dettinger, M.W. Newhouse
2006, Hydrogeology Journal (14) 1122-1146
Hydrologic time series of groundwater levels, streamflow, precipitation, and tree-ring indices from four alluvial basins in the southwestern United States were spectrally analyzed, and then frequency components were reconstructed to isolate variability due to climatic variations on four time scales. Reconstructed components (RCs), from each time series, were compared to...
Unrest in Long Valley Caldera, California, 1978-2004
David P. Hill
Troise C.De Natale G.Kilburn C.R.J., editor(s)
2006, Geological Society Special Publication 1-24
Long Valley Caldera and the Mono-Inyo Domes volcanic field in eastern California lie in a left-stepping offset along the eastern escarpment of the Sierra Nevada, at the northern end of the Owens Valley and the western margin of the Basin and Range Province. Over the last 4 Ma, this volcanic...
Nonlinear dynamics in manatee vocalizations
D.A. Mann, T. J. O'Shea, D.P. Nowacek
2006, Marine Mammal Science (22) 548-555
[No abstract available]...
