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...
Assess current and potential salmonid production in Rattlesnake Creek associated with restoration efforts
M.B. Allen, P.J. Connolly
2006, Report
No abstract available ...
Fish tag recovery from the American White Pelican nesting colony on Anaho Island, Pyramid Lake, Nevada
G.G. Scoppettone, P.H. Rissler, D. Withers, M.C. Fabes
2006, Great Basin Birds (8) 6-10
No abstract available ...
Gas hydrate potential of the mid Atlantic outer continental shelf
William W. Shedd, Deborah R. Hutchinson
2006, Fire in the Ice: NETL Methane Hydrate Newsletter (6) 8-9
For the last two years, the Minerals Management Service (MMS) has been studying the resource potential of gas hydrates in federal offshore lands of the Outer Continental Shelf (OCS) off the Atlantic, Gulf of Mexico, Pacific, and Alaska in collaboration with the U.S. Geological Survey (USGS), the Department of Energy...
Reducing risk in exploration under cover
Donald A. Singer, Ryoichi Kouda
2006, Conference Paper, Proceedings of 9th International Symposium on Mineral Exploration (ISME IX): Toward new frontiers for resource exploration and sustainable development
No abstract available....
Minding the gap: Frequency of indels in mtDNA control region sequence data and influence on population genetic analyses
John M. Pearce
2006, Molecular Ecology (15) 333-341
Insertions and deletions (indels) result in sequences of various lengths when homologous gene regions are compared among individuals or species. Although indels are typically phylogenetically informative, occurrence and incorporation of these characters as gaps in intraspecific population genetic data sets are rarely discussed. Moreover, the impact of gaps on estimates...
Atmospheric dust in modern soil on aeolian sandstone, Colorado Plateau (USA): Variation with landscape position and contribution to potential plant nutrients
Richard L. Reynolds, J. Neff, Marith C. Reheis, Paul J. Lamothe
2006, Geoderma (130) 108-123
Rock-derived nutrients in soils originate from both local bedrock and atmospheric dust, including dust from far-distant sources. Distinction between fine particles derived from local bedrock and from dust provides better understanding of the landscape-scale distribution and abundance of soil nutrients. Sandy surficial deposits over dominantly sandstone substrates, covering vast upland...
Analysis of environmental variation in a Great Plains reservoir using principal components analysis and geographic information systems
J.M. Long, W.L. Fisher
2006, Lake and Reservoir Management (22) 132-140
We present a method for spatial interpretation of environmental variation in a reservoir that integrates principal components analysis (PCA) of environmental data with geographic information systems (GIS). To illustrate our method, we used data from a Great Plains reservoir (Skiatook Lake, Oklahoma) with longitudinal variation in physicochemical conditions. We measured...
Breeding and moulting locations and migration patterns of the Atlantic population of Steller's eiders Polysticta stelleri as determined from satellite telemetry
Margaret R. Petersen, Jan O. Bustnes, Geir H. Systad
2006, Journal of Avian Biology (37) 58-68
This study was designed to determine the spring, summer, autumn, and early winter distribution, migration routes, and timing of migration of the Atlantic population of Steller's eiders Polysticta stelleri. Satellite transmitters were implanted in 20 eiders captured in April 2001 at Vads??, Norway, and their locations were determined from 5...
Static stress change from the 8 October, 2005 M = 7.6 Kashmir earthquake
T. Parsons, R.S. Yeats, Y. Yagi, A. Hussain
2006, Geophysical Research Letters (33)
We calculated static stress changes from the devastating M = 7.6 earthquake that shook Kashmir on 8 October, 2005. We mapped Coulomb stress change on target fault planes oriented by assuming a regional compressional stress regime with greatest principal stress directed orthogonally to the mainshock strike. We tested calculation sensitivity...
A component-resampling approach for estimating probability distributions from small forecast ensembles
M. Dettinger
2006, Climatic Change (76) 149-168
In many meteorological and climatological modeling applications, the availability of ensembles of predictions containing very large numbers of members would substantially ease statistical analyses and validations. This study describes and demonstrates an objective approach for generating large ensembles of "additional" realizations from smaller ensembles, where the additional ensemble members share...
Interaction Assessment: A modeling tool for predicting population dynamics from field data
John M. Emlen, Jeffrey J. Duda, Matt D. Kirchhoff, D. Carl Freeman
2006, Ecological Modelling (192) 557-570
Interaction Assessment (INTASS) is a field and analytic methodology for constructing population dynamics models. Because data collected in generating a model for one species comprise much of the information needed for other species, a small increase in effort can result in simultaneous expressions for the dynamics of multiple species. These...
Effects of egg size, parental quality and hatch-date on growth and survival of Common Tern Sterna hirundo chicks
J.M. Arnold, J.J. Hatch, I.C.T. Nisbet
2006, Ibis (148) 98-105
We examined the relative contributions of egg size, parental quality and hatch-date to growth and survival of second-hatched chicks (those chicks making the greatest contribution to differences in productivity among pairs) by exchanging clutches among nests of Common Terns Sterna hirundo matched for lay-date (range 13 May to 9 June)....
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...
Geology of the Yucca Mountain region
J. S. Stuckless, Dennis W. O’Leary
2006, Memoir of the Geological Society of America (199) 9-50
Yucca Mountain has been proposed as the site for the nation's first geologic repository for high-level radioactive waste. This chapter provides the geologic framework for the Yucca Mountain region. The regional geologic units range in age from late Precambrian through Holocene, and these are described briefly. Yucca Mountain is composed...
Water-quality characteristics and contaminants in the rural karst-dominated Spring Mill Lake watershed, southern Indiana
N.R. Hasenmueller, M.A. Buehler, N.C. Krothe, J.B. Comer, T.D. Branam, M.V. Ennis, R.T. Smith, D.D. Zamani, L. Hahn, J.P. Rybarczyk
2006, Special Paper of the Geological Society of America 153-167
The Spring Mill Lake watershed is located in the Mitchell Plateau, a karst area that developed on Mississippian carbonates in southern Indiana. Spring Mill Lake is a reservoir built in the late 1930s and is located in Spring Mill State Park. Within the park, groundwater from subsurface conduits issues as...
Denitrification potential in stream sediments impacted by acid mine drainage: Effects of pH, various electron donors, and iron
J.L. Baeseman, R. L. Smith, J. Silverstein
2006, Microbial Ecology (51) 232-241
Acid mine drainage (AMD) contaminates thousands of kilometers of stream in the western United States. At the same time, nitrogen loading to many mountain watersheds is increasing because of atmospheric deposition of nitrate and increased human use. Relatively little is known about nitrogen cycling in acidic, heavy-metal-laden streams; however,...
An integrated chronostratigraphic data system for the twenty-first century
P.J. Sikora, James G. Ogg, A. Gary, C. Cervato, Felix Gradstein, B.T. Huber, C. Marshall, J.A. Stein, B. Wardlaw
2006, Special Paper of the Geological Society of America 53-59
Research in stratigraphy is increasingly multidisciplinary and conducted by diverse research teams whose members can be widely separated. This developing distributed-research process, facilitated by the availability of the Internet, promises tremendous future benefits to researchers. However, its full potential is hindered by the absence of a development strategy for the...
The quest for the perfect gravity anomaly: Part 2 - Mass effects and anomaly inversion
Gordon R. Keller, T.G. Hildenbrand, W. J. Hinze, X. Li, D. Ravat, M. Webring
2006, SEG Technical Program Expanded Abstracts (25) 864-868
Gravity anomalies have become an important tool for geologic studies since the widespread use of high-precision gravimeters after the Second World War. More recently the development of instrumentation for airborne gravity observations, procedures for acquiring data from satellite platforms, the readily available Global Positioning System for precise vertical and horizontal...
Distribution of boreal toad populations in relation to estimated UV-B dose in Glacier National Park, Montana, USA
B. R. Hossack, S. A. Diamond, P.S. Corn
2006, Canadian Journal of Zoology (84) 98-107
A recent increase in ultraviolet B radiation is one hypothesis advanced to explain suspected or documented declines of the boreal toad (Bufo boreas Baird and Girard, 1852) across much of the western USA, where some experiments have shown ambient UV-B can reduce embryo survival. We examined B. boreas occupancy relative...
Ecological values of shallow-water habitats: Implications for the restoration of disturbed ecosystems
C.B. Lopez, J. E. Cloern, T.S. Schraga, A.J. Little, L.V. Lucas, J.K. Thompson, J.R. Burau
2006, Ecosystems (9) 422-440
A presumed value of shallow-habitat enhanced pelagic productivity derives from the principle that in nutrient-rich aquatic systems phytoplankton growth rate is controlled by light availability, which varies inversely with habitat depth. We measured a set of biological indicators across the gradient of habitat depth within the Sacramento–San Joaquin River...
Habitat-based adaptive management at Mount Haggin Wildlife Management Area
R.B. Keigley, C.W. Fager
2006, Alces (42) 49-54
The 22,743-hectare Mount Haggin Wildlife Management Area was purchased in 1976, in part for moose (Alces alces) winter range. Observed moose populations climbed from a low of 7 in 1976 to a high of 56 in 2000. A 4-step management program was initiated in 2000 consisting of definition of management...
Cosmogenic 10Be and 26Al exposure ages of tors and erratics, Cairngorm Mountains, Scotland: Timescales for the development of a classic landscape of selective linear glacial erosion
W.M. Phillips, A.M. Hall, R. Mottram, L.K. Fifield, D.E. Sugden
2006, Geomorphology (73) 222-245
The occurrence of tors within glaciated regions has been widely cited as evidence for the preservation of relic pre-Quaternary landscapes beneath protective covers of non-erosive dry-based ice. Here, we test for the preservation of pre-Quaternary landscapes with cosmogenic surface exposure dating of tors. Numerous granite tors are present on summit...
Rainfall characteristics for shallow landsliding in Seattle, Washington, USA
J. W. Godt, R.L. Baum, A.F. Chleborad
2006, Earth Surface Processes and Landforms (31) 97-110
Shallow landsliding in the Seattle, Washington, area, has caused the occasional loss of human life and millions of dollars in damage to property. The effective management of the hazzard requires an understanding of the rainfall conditions that result in landslides. We present an empirical approach to quantify the antecedent moisture...
Effects of enhanced zinc and copper in drinking water on spatial memory and fear conditioning
L.D. Chrosniak, L.N. Smith, C.G. McDonald, B.F. Jones, J.M. Flinn
2006, Journal of Geochemical Exploration (88) 91-94
Ingestion of enhanced zinc can cause memory impairments and copper deficiencies. This study examined the effect of zinc supplementation, with and without copper, on two types of memory. Rats raised pre- and post-natally on 10 mg/kg ZnCO3 or ZnSO4 in the drinking water were tested in a fear-conditioning experiment at...
