Benthic foraminiferal assemblages in Osaka Bay, southwestern Japan: Faunal changes over the last 50 years
Akira Tsujimoto, Ritsuo Nomura, Moriaki Yasuhara, Shusaku Yoshikawa
2006, Paleontological Research (10) 141-161
Live benthic foraminiferal assemblages from surface sediment in Osaka Bay collected in 1999 were analyzed to characterize the distribution of the modern foraminiferal assemblages. Foraminiferal assemblages were compared with those of previous studies to document environmental changes in Osaka Bay over the past 50 years. Sixty-one species of foraminifera belonging...
Late Quaternary eolian dust in surficial deposits of a Colorado Plateau grassland: Controls on distribution and ecologic effects
R. L. Reynolds, M.C. Reheis, J. C. Neff, H. Goldstein, J. Yount
2006, Catena (66) 251-266
In a semi-arid, upland setting on the Colorado Plateau that is underlain by nutrient-poor Paleozoic eolian sandstone, alternating episodes of dune activity and soil formation during the late Pleistocene and Holocene have produced dominantly sandy deposits that support grass and shrub communities. These deposits also contain eolian dust, especially in...
A reexamination of the Sudbury landing
D.S. Ross
2006, Icarus (183) 233-234
The arrival of the massive body that led to the Sudbury impact structure has been interpreted as a relatively gentle event, with temperatures not exceeding 1300 K on the basis of the presence of fullerene-caged helium. Such temperatures are well below the 10,000 K peaks suggested in large impact modeling,...
Improving the precision of otolith-based age estimates for Greenland halibut (Reinhardtius hippoglossoides) with preparation methods adapted for fragile sagittae
J.L. Gregg, D.M. Anderl, D.K. Kimura
2006, Fishery Bulletin (104) 643-648
[No abstract available]...
Advanced National Siesmic System delivers improved information
S.A. Sipkin, J.R. Filson, H.M. Benz, D.J. Wald, P.S. Earle
2006, Eos, Transactions, American Geophysical Union (87) 365-366
[No abstract available]...
Fault dating in the Canadian Rocky Mountains: Evidence for late Cretaceous and early Eocene orogenic pulses
B.A. van der Pluijm, P.J. Vrolijk, D.R. Pevear, C.M. Hall, J. Solum
2006, Geology (34) 837-840
Fault rocks from the classic Rocky Mountain foreland fold-and-thrust belt in south-western Canada were dated by Ar analysis of clay grain-size fractions. Using X-ray diffraction quantification of the detrital and authigenic component of each fraction, these determinations give ages for individual faults in the area (illite age analysis). The resulting...
A survey of chemical constituents in National Fish Hatchery fish feed
Alec G. Maule, Ann Gannam, Jay Davis
2006, Report
Recent studies have demonstrated that various fish feeds contain significant concentrations of contaminants, many of which can bioaccumulate and bioconcentrate in fish. It appears that numerous organochlorine (OC) contaminants are present in the fish oils and fish meals used in feed manufacture, and some researchers speculate that all fish feeds...
Life history, ecology and population viability analysis of the Independence Lake strain Lahontan Cutthroat trout
P.H. Rissler, G.G. Scoppettone, S. Shea
2006, Report
n/a...
Trends in summer chemistry linked to productivity in lakes recovering from acid deposition in the Adirondack region of New York
B. Momen, G.B. Lawrence, S. A. Nierzwicki-Bauer, J.W. Sutherland, L.W. Eichler, J.P. Harrison, C.W. Boylen
2006, Ecosystems (9) 1306-1317
The US Environmental Protection Agency established the Adirondack Effects Assessment Program (AEAP) to evaluate and monitor the status of biological communities in lakes in the Adirondack region of New York that have been adversely affected by acid deposition. This program includes chemical analysis of 30 lakes, sampled two to three...
Enabling scientific workflows in virtual reality
O. Kreylos, G. Bawden, T. Bernardin, M.I. Billen, E.S. Cowgill, R.D. Gold, B. Hamann, M. Jadamec, L.H. Kellogg, O.G. Staadt, D.Y. Sumner
2006, Conference Paper, Proceedings - VRCIA 2006ACM International Conference on Virtual Reality Continuum and its Applications
To advance research and improve the scientific return on data collection and interpretation efforts in the geosciences, we have developed methods of interactive visualization, with a special focus on immersive virtual reality (VR) environments. Earth sciences employ a strongly visual approach to the measurement and analysis of geologic data due...
Inhibition of coral recruitment by macroalgae and cyanobacteria
I. B. Kuffner, L.J. Walters, M.A. Becerro, V.J. Paul, R. Ritson-Williams, K.S. Beach
2006, Marine Ecology Progress Series (323) 107-117
Coral recruitment is a key process in the maintenance and recovery of coral reef ecosystems. While intense competition between coral and algae is often assumed on reefs that have undergone phase shifts from coral to algal dominance, data examining the competitive interactions involved, particularly during the larval and immediate post-settlement...
Alpine plant community trends on the elk summer range of Rocky Mountain National Park, Colorado: An analysis of existing data
Linda Zeigenfuss
2006, Open-File Report 2006-1122
The majority of the elk (Cervus elaphus) population of Rocky Mountain National Park in Colorado summer in the park’s high-elevation alpine and subalpine meadows and willow krummholz. The park’s population of white-tailed ptarmigan (Lagopus leucurus altipetens) depends on both dwarf and krummholz willows for food and cover. Concern about the...
Tamarisk control, water salvage, and wildlife habitat restoration along rivers in the western United States
Patrick B. Shafroth
2006, Fact Sheet 2006-3071
In the latter part of the 19th century, species of the nonnative shrub tamarisk (also called saltcedar; for example, Tamarix ramosissima, T. chinensis) were introduced to the United States for use as ornamental plants for erosion control. By 1877, some naturalized populations had become established, and by the 1960s, tamarisk...
National Institute of Invasive Species Science (NIISS)
Tom Stohlgren
2006, Fact Sheet 2006-3036
The National Institute of Invasive Species Science (www.NIISS.org) is a consortium of governmental and nongovernmental partners, led by the U.S. Geological Survey (USGS), whose aim is to provide reliable information and advanced decision support tools for documenting, understanding, predicting, assessing, and addressing the threat of invasive species in the United...
Disease emergence and resurgence—the wildlife-human connection
Milton Friend, James W. Hurley, Pauline Nol, Katherine E. Wesenberg
2006, Circular 1285
In 2000, the Global Outbreak Alert and Response Network (GOARN) was organized as a global disease watchdog group to coordinate disease outbreak information and health crisis response. The World Health Organization (WHO) is the headquarters for this network. Understandably, the primary focus for WHO is human health. However, diseases such...
A shock-induced polymorph of anatase and rutile from the Chesapeake Bay impact structure, Virginia, U.S.A
J.C. Jackson, J. Wright Horton Jr., I.-M. Chou, H. E. Belkin
2006, American Mineralogist (91) 604-608
A shock-induced polymorph (TiO2II) of anatase and rutile has been identified in breccias from the late Eocene Chesapeake Bay impact structure. The breccia samples are from a recent, partially cored test hole in the central uplift at Cape Charles, Virginia. The drill cores from 744 to 823 m depth consist...
Field tests of acoustic telemetry for a portable coastal observatory
M. Martini, B. Butman, J. Ware, D. Frye
2006, Conference Paper, OCEANS 2006
Long-term field tests of a low-cost acoustic telemetry system were carried out at two sites in Massachusetts Bay. At each site, an acoustic Doppler current profiler mounted on a bottom tripod was fitted with an acoustic modem to transmit data to a surface buoy; electronics mounted on the buoy relayed...
Magnesium compounds
D.A. Kramer
2006, Mining Engineering (58) 44-45
In 2005, seawater and natural brines accounted for 51% of US magnesium compounds production. World magnesia production was estimated to be 14.5 Mt. Most of the production came from China, North Korea, Russia and Turkey. Although no specific production figures are available, Japan and the United States are estimated to...
Differential response in chick survival to diet in least and crested auklets
Adrian E. Gall, D.D. Roby, D.B. Irons, I.C. Rose
2006, Marine Ecology Progress Series (308) 279-291
Least auklets Aethia pusilla and crested auklets A. cristatella are abundant planktivorous seabirds found throughout the Bering Sea and are inextricably linked to the secondary productivity of this northern marine ecosystem. We assessed the relationship between productivity and diet in least and crested auklets by examining breeding chronology, daily survival...
Organic geochemistry - A retrospective of its first 70 years
K.A. Kvenvolden
2006, Conference Paper, Organic Geochemistry
Organic geochemistry had its origin in the early part of the 20th century when organic chemists and geologists realized that detailed information on the organic materials in sediments and rocks was scientifically interesting and of practical importance. The generally acknowledged "father" of organic geochemistry is Alfred E. Treibs (1899-1983), who...
Microbial transformations of arsenic in the environment: From soda lakes to aquifers
J.R. Lloyd, R.S. Oremland
2006, Elements (2) 85-90
Arsenic is a highly toxic element that supports a surprising range of biogeochemical transformations. The biochemical basis of these microbial interactions is described, with an emphasis on energy-yielding redox biotransformations that cycle between the As5+ and As3+ oxidation states. The subsequent impact of As3+-oxidising and As 5+-reducing prokaryotes on the...
Inverse modeling for seawater intrusion in coastal aquifers: Insights about parameter sensitivities, variances, correlations and estimation procedures derived from the Henry problem
E. Sanz, C.I. Voss
2006, Advances in Water Resources (29) 439-457
Inverse modeling studies employing data collected from the classic Henry seawater intrusion problem give insight into several important aspects of inverse modeling of seawater intrusion problems and effective measurement strategies for estimation of parameters for seawater intrusion. Despite the simplicity of the Henry problem, it embodies the behavior of a...
Structural fabrics, mineralization and Lamaride kinematics of the Idaho Springs-Ralston shear zone, Colorado mineral belt and central Front Range uplift
Jonathan S. Caine, E.P. Nelson, S.T. Beach, P.W. Layer
2006, Mountain Geologist (43) 1-24
The Idaho Springs and Central City mining districts form the central portion of a structurally controlled hydrothermal precious- and base-metal vein system in the Front Range of the northeast-trending Colorado Mineral Belt. Three new 40Ar/39Ar plateau ages on hydrothermal sericite indicate the veins formed during the Laramide orogeny between 65.4??1.5...
Isoeugenol concentrations in rainbow trout (Oncorhynchus mykiss) skin-on fillet tissue after exposure to AQUI-S™ at different temperatures, durations, and concentrations
Jeffery R. Meinertz, Shari L. Greseth, Theresa M. Schreier, Jeffry A. Bernardy, William H. Gingerich
2006, Aquaculture (254) 347-354
AQUI-S™ is a fish anesthetic/sedative approved for use in several countries including Australia, Chile, and New Zealand and is being pursued for use in the United States. Legal use of AQUI-S™ as an anesthetic in U.S. fish culture depends on approval by the U.S. Food and Drug Administration (FDA)....
Effect of summer throughfall exclusion, summer drought, and winter snow cover on methane fluxes in a temperate forest soil
W. Borken, E.A. Davidson, K. Savage, E.T. Sundquist, P. Steudler
2006, Soil Biology and Biochemistry (38) 1388-1395
Soil moisture strongly controls the uptake of atmospheric methane by limiting the diffusion of methane into the soil, resulting in a negative correlation between soil moisture and methane uptake rates under most non-drought conditions. However, little is known about the effect of water stress on methane uptake in temperate forests...
