Arsenic species in weathering mine tailings and biogenic solids at the Lava Cap Mine Superfund Site, Nevada City, CA
Andrea L. Foster, Roger P. Ashley, James J. Rytuba
2011, Geochemical Transactions (12)
Background A realistic estimation of the health risk of human exposure to solid-phase arsenic (As) derived from historic mining operations is a major challenge to redevelopment of California's famed "Mother Lode" region. Arsenic, a known carcinogen, occurs in multiple solid forms that vary in bioaccessibility. X-ray absorption fine-structure spectroscopy (XAFS) was...
Estimating California ecosystem carbon change using process model and land cover disturbance data: 1951-2000
Jinxun Liu, James E. Vogelmann, Zhiliang Zhu, Carl H. Key, Benjamin M. Sleeter, D.T. Price, Jing M. Chen, Mark A. Cochrane, Jeffery C. Eidenshink, Stephen M. Howard, Norman B. Bliss, Hong Jiang
2011, Ecological Modelling (222) 2333-2341
Land use change, natural disturbance, and climate change directly alter ecosystem productivity and carbon stock level. The estimation of ecosystem carbon dynamics depends on the quality of land cover change data and the effectiveness of the ecosystem models that represent the vegetation growth processes and disturbance effects. We used...
Using luminescence dating of coarse matrix material to estimate the slip rate of the Astaneh fault, Iran
M. Rizza, Shannon A. Mahan, J.-F. Ritz, H. Nazari, J. Hollingsworth, R. Salamati
2011, Quaternary Geochronology (6) 390-406
In this paper, we present optically and infrared stimulated luminescence (OSL and IRSL) ages for four samples from alluvial fan surfaces in the Astaneh Valley. This valley is located in the north-east part of the Alborz range in Iran. Our morphologic interpretations recognize at least three generations of fans in the study area,...
A survey of bees (hymenoptera: Apoidea) of the Indiana dunes and Northwest Indiana, USA
R. Grundel, R.P. Jean, K.J. Frohnapple, J. Gibbs, G.A. Glowacki, N.B. Pavlovic
2011, Journal of the Kansas Entomological Society (84) 105-138
The Indiana Dunes, and nearby natural areas in northwest Indiana, are floristically rich Midwest U.S. locales with many habitat types. We surveyed bees along a habitat gradient ranging from grasslands to forests in these locales, collecting at least 175 bee species along this gradient plus 29 additional species in other...
And last comes XYZ
Bill Langer
2011, Aggregates Manager (16) 52-52
Catesian Coordinates can be used to specify the position of any point in three-dimensional space by measuring its distances from three mutually perpendicular planes....
Monitoring soil geochemistry in the urban environment: A comparison of studies in 1972 and 2005 in Denver, Colorado
David B. Smith, Karl J. Ellefsen, Ronald G. Garrett, L. Graham Closs
2011, Book
No abstract available...
Excess nitrogen in the U.S. environment: Trends, risks, and solutions
E.A. Davidson, M.B. David, J.N. Galloway, C.L. Goodale, R. Haeuber, J. A. Harrison, R. W. Howarth, D.B. Jaynes, R.R. Lowrance, Nolan B. Thomas, J.L. Peel, R.W. Pinder, E. Porter, C.S. Snyder, A.R. Townsend, M.H. Ward
2011, Issues in Ecology
It is not surprising that humans have profoundly altered the global nitrogen (N) cycle in an effort to feed 7 billion people, because nitrogen is an essential plant and animal nutrient. Food and energy production from agriculture, combined with industrial and energy sources, have more than doubled the amount of...
Mineralogical and geochemical evidence for hydrothermal activity at the west wall of 12°50′N core complex (Mid-Atlantic ridge): a new ultramafic-hosted seafloor hydrothermal deposit?
Vesselin Dekov, Tanya Boycheva, Ulf Halenius, Kjell Billstrom, George D. Kamenov, Wayne C. Shanks, Jens Stummeyer
2011, Marine Geology (288) 90-102
Dredging along the west wall of the core complex at 12°50′N Mid-Atlantic Ridge sampled a number of black oxyhydroxide crusts and breccias cemented by black and dark brown oxyhydroxide matrix. Black crusts found on top of basalt clasts (rubble) are mainly composed of Mn-oxides (birnessite, 10-Å manganates) with thin films...
Wind River watershed restoration, annual report November 2009 to October 2010.
P.J. Connolly, I.G. Jezorek
2011, Report
This report summarizes work completed by U.S. Geological Survey’s Columbia River Research Laboratory (USGS-CRRL) in the Wind River subbasin during the period November 2009 through October 2010 under Bonneville Power Administration (BPA) contract 46102. Long term research in the Wind River has focused on assessments of steelhead/rainbow trout Oncorhynchus mykiss...
Factors affecting winter survival of female mallards in the lower Mississippi alluvial valley
B.E. Davis, A. D. Afton, R. R. Cox Jr.
2011, Waterbirds (34) 186-194
The lower Mississippi Alluvial Valley (hereafter LMAV) provides winter habitat for approximately 40% of the Mississippi Flyway's Mallard (Anas platyrhynhcos) population; information on winter survival rates of female Mallards in the LMAV is restricted to data collected prior to implementation of the North American Waterfowl Management Plan. To estimate recent...
Natural and human dimensions of a quasi-wild species: The case of kudzu
Z. Li, Q. Dong, Thomas P. Albright, Q. Guo
2011, Biological Invasions (13) 2167-2179
The human dimensions of biotic invasion are generally poorly understood, even among the most familiar invasive species. Kudzu (Pueraria montana (Lour.) Merr.) is a prominent invasive plant and an example of quasi-wild species, which has experienced repeated introduction, cultivation, and escape back to the wild. Here, we review a large body...
Mars: the evolutionary history of the northern lowlands based on crater counting and geologic mapping
S.C. Werner, K. L. Tanaka, J.A. Skinner Jr.
2011, Planetary and Space Science (59) 1143-1165
The geologic history of planetary surfaces is most effectively determined by joining geologic mapping and crater counting which provides an iterative, qualitative and quantitative method for defining relative ages and absolute model ages. Based on this approach, we present spatial and temporal details regarding the evolution of the Martian northern...
USGS remote sensing coordination for the 2010 Haiti earthquake
Kenneth A. Duda, Brenda Jones
2011, Photogrammetric Engineering and Remote Sensing (77) 899-908
In response to the devastating 12 January 2010, earthquake in Haiti, the US Geological Survey (USGS) provided essential coordinating services for remote sensing activities. Communication was rapidly established between the widely distributed response teams and data providers to define imaging requirements and sensor tasking opportunities. Data acquired from a variety...
40Ar* loss in experimentally deformed muscovite and biotite with implications for 40Ar/39Ar geochronology of naturally deformed rocks
M. Cosca, H. Stunitz, A.-L. Bourgeix, J.P. Lee
2011, Geochimica et Cosmochimica Acta (75) 7759-7778
The effects of deformation on radiogenic argon (40Ar∗) retentivity in mica are described from high pressure experiments performed on rock samples of peraluminous granite containing euhedral muscovite and biotite. Cylindrical cores, ∼15 mm in length and 6.25 mm in diameter, were drilled from granite collected from the South Armorican Massif in...
Shared bacterial and viral respiratory agents in bighorn sheep (Ovis canadensis), domestic sheep (Ovis aries), and goats (Capra hircus) in Montana
David S. Miller, Glen C. Weiser, Keith Aune, Brent Roeder, Mark Atkinson, Neil Anderson, Thomas J. Roffe, Kim A. Keating, Phillip L. Chapman, Cleon Kimberling, Jack C. Rhyan, P. Ryan Clarke
2011, Veterinary Medicine International (2011)
Transmission of infectious agents from livestock reservoirs has been hypothesized to cause respiratory disease outbreaks in bighorn sheep (Ovis canadensis), and land management policies intended to limit this transmission have proven controversial. This cross-sectional study compares the infectious agents present in multiple populations of bighorn sheep near to and distant...
Genetic variation in westslope cutthroat trout Oncorhynchus clarkii lewisi: Implications for conservation
D.P. Drinan, S.T. Kalinowski, N.V. Vu, B.B. Shepard, C.C. Muhlfeld, M. R. Campbell
2011, Conservation Genetics (12) 1513-1523
Twenty-five populations of westslope cutthroat trout from throughout their native range were genotyped at 20 microsatellite loci to describe the genetic structure of westslope cutthroat trout. The most genetic diversity (heterozygosity, allelic richness, and private alleles) existed in populations from the Snake River drainage, while populations from the Missouri River...
Gas hydrate saturation from acoustic impedance and resistivity logs in the Shenhu area, south China Sea
X. Wang, S. Wu, M. Lee, Y. Guo, S. Yang, J. Liang
2011, Marine and Petroleum Geology (28) 1625-1633
During the China’s first gas hydrate drilling expedition -1 (GMGS-1), gas hydrate was discovered in layers ranging from 10 to 25 m above the base of gas hydrate stability zone in the Shenhu area, South China Sea. Water chemistry, electrical resistivity logs, and acoustic impedance were used to estimate gas hydrate...
Bounce Rock-A shergottite-like basalt encountered at Meridiani Planum, Mars
J. Zipfel, C. Schroder, B.L. Jolliff, Ralf Gellert, K. E. Herkenhoff, R. Rieder, R. Anderson, J.F. Bell III, J. Bruckner, J.A. Crisp, P. R. Christensen, B. C. Clark, P.A. de Souza, G. Dreibus, C. D'uston, T. Economou, S.P. Gorevan, B.C. Hahn, G. Klingelhofer, T.J. McCoy, H.Y. McSween, D. W. Ming, R.V. Morris, D.S. Rodionov, S. W. Squyres, H. Wanke, S.P. Wright, M.B. Wyatt, A. S. Yen
2011, Meteoritics and Planetary Science (46) 1-20
The Opportunity rover of the Mars Exploration Rover mission encountered an isolated rock fragment with textural, mineralogical, and chemical properties similar to basaltic shergottites. This finding was confirmed by all rover instruments, and a comprehensive study of these results is reported here. Spectra from the miniature thermal emission spectrometer and...
An inexpensive instrument for measuring wave exposure and water velocity
J.D. Figurski, D. Malone, J.R. Lacy, M. Denny
2011, Limnology and Oceanography: Methods (9) 204-214
Ocean waves drive a wide variety of nearshore physical processes, structuring entire ecosystems through their direct and indirect effects on the settlement, behavior, and survivorship of marine organisms. However, wave exposure remains difficult and expensive to measure. Here, we report on an inexpensive and easily constructed instrument for measuring wave-induced...
Controls on large landslide distribution and implications for the geomorphic evolution of the southern interior Columbia River basin
E.B. Safran, S.W. Anderson, M. Mills-Novoa, P.K. House, L. Ely
2011, Geological Society of America Bulletin (123) 1851-1862
Large landslides (>0.1 km2) are important agents of geomorphic change. While most common in rugged mountain ranges, large landslides can also be widespread in relatively low-relief (several 100 m) terrain, where their distribution has been relatively little studied. A fuller understanding of the role of large landslides in landscape evolution...
Parallelization of GeoClaw code for modeling geophysical flows with adaptive mesh refinement on many-core systems
S. Zhang, D.A. Yuen, A. Zhu, S. Song, David L. George
2011, Conference Paper, 14th IEEE Int. Conf. on Computational Science and Engineering, CSE 2011 and 11th Int. Symp. on Pervasive Systems, Algorithms, and Networks, I-SPA 2011 and 10th IEEE Int. Conf. on IUCC 2011
We parallelized the GeoClaw code on one-level grid using OpenMP in March, 2011 to meet the urgent need of simulating tsunami waves at near-shore from Tohoku 2011 and achieved over 75% of the potential speed-up on an eight core Dell Precision T7500 workstation [1]. After submitting that work to SC11...
Hierarchical spatial capture-recapture models for estimating density from trapping arrays
J. Andrew Royle, B. Gardner
Allan F. O’Connell, James D. Nichols, K. Ullas Karanth, editor(s)
2011, Book chapter, Camera traps in animal ecology: Methods and analyses
No abstract available....
Using multi-source satellite data for lake level modelling in ungauged basins: A case study for Lake Turkana, East Africa
N.M. Velpuri, G.B. Senay, K.O. Asante
2011, Hydrology and Earth System Sciences Discussions (8) 4851-4890
Managing limited surface water resources is a great challenge in areas where ground-based data are either limited or unavailable. Direct or indirect measurements of surface water resources through remote sensing offer several advantages of monitoring in ungauged basins. A physical based hydrologic technique to monitor lake water levels in ungauged...
Soil and periphyton indicators of anthropogenic water-quality changes in a rainfall-driven wetland
P.V. McCormick
2011, Wetlands Ecology and Management (19) 19-34
Surface soils and periphyton communities were sampled across an oligotrophic, soft-water wetland to document changes associated with pulsed inputs of nutrient- and mineral-rich canal drainage waters. A gradient of canal-water influence was indicated by the surface-water specific conductance, which ranged between 743 and 963 μS cm−1 in the canals to as low as...
Integument coloration signals reproductive success, heterozygosity, and antioxidant levels in chick-rearing black-legged kittiwakes
S. Leclaire, J. White, E. Arnoux, B. Faivre, N. Vetter, Scott A. Hatch, E. Danchin
2011, Die Naturwissenschaften (98) 773-782
Carotenoid pigments are important for immunity and as antioxidants, and carotenoid-based colors are believed to provide honest signals of individual quality. Other colorless but more efficient antioxidants such as vitamins A and E may protect carotenoids from bleaching. Carotenoid-based colors have thus recently been suggested to reflect the concentration of...
