Effect of cryopreservation and in vitro culture of bovine fibroblasts on histone acetylation levels and in vitro development of hand-made cloned embryos
L. Chacon, M.C. Gomez, J.A. Jenkins, S.P. Leibo, G. Wirtu, B.L. Dresser, C.E. Pope
2011, Zygote (19) 255-264
In this study, the relative acetylation levels of histone 3 in lysine 9 (H3K9ac) in cultured and cryopreserved bovine fibroblasts was measured and we determined the influence of the epigenetic status of three cultured (C1, C2 and C3) donor cell lines on the in vitro development of reconstructed bovine embryos. Results...
Compositional diversity and geologic insights of the Aristarchus crater from Moon Mineralogy Mapper data
J.F. Mustard, C.M. Pieters, P.J. Isaacson, J.W. Head, S. Besse, R. N. Clark, R.L. Klima, N.E. Petro, M.I. Staid, J.M. Sunshine, C.J. Runyon, S. Tompkins
2011, Journal of Geophysical Research E: Planets (116)
The Moon Mineralogy Mapper (M3) acquired high spatial and spectral resolution data of the Aristarchus Plateau with 140 m/pixel in 85 spectral bands from 0.43 to 3.0 m. The data were collected as radiance and converted to reflectance using the observational constraints and a solar spectrum scaled to the Moon-Sun...
Assessing the potential for luminescence dating of basalts
S. Tsukamoto, G.A.T. Duller, A.G. Wintle, Daniel R. Muhs
2011, Quaternary Geochronology (6) 61-70
The possibility of dating basalt using luminescence was tested on four samples with independent age control from Cima volcanic field, California, with the ultimate aim of assessing whether the technique could be used to date sediments on the surface of Mars. Previous analysis of these samples had demonstrated that the infrared stimulated...
Active aeolian processes on Mars: A regional study in Arabia and Meridiani Terrae
S. Silvestro, D.A. Vaz, L.K. Fenton, Paul E. Geissler
2011, Geophysical Research Letters (38)
We present evidence of widespread aeolian activity in the Arabia Terra/Meridiani region (Mars), where different kinds of aeolian modifications have been detected and classified. Passing from the regional to the local scale, we describe one particular dune field in Meridiani Planum, where two ripple populations are distinguished by means of...
Impacts of agricultural land use on biological integrity: A causal analysis
C.M. Riseng, M.J. Wiley, Robert W. Black, M.D. Munn
2011, Ecological Applications (21) 3128-3146
Agricultural land use has often been linked to nutrient enrichment, habitat degradation, hydrologic alteration, and loss of biotic integrity in streams. The U.S. Geological Survey's National Water Quality Assessment Program sampled 226 stream sites located in eight agriculture‐dominated study units across the United States to investigate the geographic variability and...
Gas geochemistry of the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: implications for gas hydrate exploration in the Arctic
T.D. Lorenson, T. S. Collett, R.B. Hunter
2011, Marine and Petroleum Geology (28) 343-360
Gases were analyzed from well cuttings, core, gas hydrate, and formation tests at the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well, drilled within the Milne Point Unit, Alaska North Slope. The well penetrated a portion of the Eileen gas hydrate deposit, which overlies the more deeply buried Prudhoe Bay,...
2-D inner-shelf current observations from a single VHF WEllen RAdar (WERA) station
G. Voulgaris, N. Kumar, K.-W. Gurgel, John C. Warner, Jeffrey H. List
2011, Conference Paper, 2011 IEEE/OES/CWTM 10th working conference on current, waves and turbulence measurement, CWTM 2011
The majority of High Frequency (HF) radars used worldwide operate at medium to high frequencies (8 to 30 MHz) providing spatial resolutions ranging from 3 to 1.5 km and ranges from 150 to 50 km. This paper presents results from the deployment of a single Very High Frequency (VHF, 48...
Glacial influence on the geochemistry of riverine iron fluxes to the Gulf of Alaska and effects of deglaciation
A.W. Schroth, John Crusius, F. Chever, B.C. Bostick, O.J. Rouxel
2011, Geophysical Research Letters (38)
Riverine iron (Fe) derived from glacial weathering is a critical micronutrient source to ecosystems of the Gulf of Alaska (GoA). Here we demonstrate that the source and chemical nature of riverine Fe input to the GoA could change dramatically due to the widespread watershed deglaciation that is underway. We examine...
Does the "kamaroma"-plastron pattern morph occur in both Philippine subspecies of the turtle Cuora amboinensis?
C.H. Ernst, A.F. Laemmerzahl, Jeffrey E. Lovich
2011, Proceedings of the Biological Society of Washington (124) 259-269
Two subspecies of the turtle Cuora amboinensis have been reported from the Philippine Islands, C. a. amboinensis and C. a. kamaroma, distinguished primarily by their carapace morphology, and secondarily by their plastron patterns. We assessed the utility of using shell and postorbital-stripe morphology instead of plastron patterns to distinguish these putative taxa. Adult <span...
No correlation between Anderson Reservoir stage level and underlying Calaveras fault seismicity despite calculated differential stress increases
T. Parsons
2011, Lithosphere (3) 261-264
Concerns have been raised that stresses from reservoir impoundment may trigger damaging earthquakes because rate changes have been associated with reservoir impoundment or stage-level changes globally. Here, the idea is tested blindly using Anderson Reservoir, which lies atop the seismically active Calaveras fault. The only knowledge held by the author...
Are patterns in nutrient limitation belowground consistent with those aboveground: Results from a 4 million year chronosequence
Sasha C. Reed, P.M. Vitousek, C.C. Cleveland
2011, Biogeochemistry (106) 323-336
Accurately predicting the effects of global change on net carbon (C) exchange between terrestrial ecosystems and the atmosphere requires a more complete understanding of how nutrient availability regulates both plant growth and heterotrophic soil respiration. Models of soil development suggest that the nature of nutrient limitation changes over the course...
Observations of changes in waveform character induced by the 1999 Mw7.6 Chi-Chi earthquake
K.H. Chen, T. Furumura, J. Rubinstein, R.-J. Rau
2011, Geophysical Research Letters (38)
We observe changes in the waveforms of repeating earthquakes in eastern Taiwan following the 1999 Mw7.6 Chi-Chi earthquake, while their recurrence intervals appear to be unaffected. There is a clear reduction in waveform similarity and velocity changes indicated by delayed phases at the time of the Chi-Chi event. These changes...
Stochastic population dynamics in populations of western terrestrial garter snakes with divergent life histories
David A. Miller, W.R. Clark, S.J. Arnold, A.M. Bronikowski
2011, Ecology (92) 1658-1671
Comparative evaluations of population dynamics in species with temporal and spatial variation in life‐history traits are rare because they require long‐term demographic time series from multiple populations. We present such an analysis using demographic data collected during the interval 1978–1996 for six populations of western terrestrial garter snakes (Thamnophis elegans)...
Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: Coring operations, core sedimentology, and lithostratigraphy
K. Rose, R. Boswell, Timothy S. Collett
2011, Marine and Petroleum Geology (28) 311-331
In February 2007, BP Exploration (Alaska), the U.S. Department of Energy, and the U.S. Geological Survey completed the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well (Mount Elbert well) in the Milne Point Unit on the Alaska North Slope. The program achieved its primary goals of validating the pre-drill estimates...
CyberShake: A Physics-Based Seismic Hazard Model for Southern California
R. Graves, T.H. Jordan, S. Callaghan, E. Deelman, Edward H. Field, G. Juve, C. Kesselman, P. Maechling, G. Mehta, K. Milner, D. Okaya, P. Small, K. Vahi
2011, Pure and Applied Geophysics (168) 367-381
CyberShake, as part of the Southern California Earthquake Center’s (SCEC) Community Modeling Environment, is developing a methodology that explicitly incorporates deterministic source and wave propagation effects within seismic hazard calculations through the use of physics-based 3D ground motion simulations. To calculate a waveform-based seismic hazard estimate for a site of...
A behavior-oriented dynamic model for sandbar migration and 2DH evolution
K.D. Splinter, R.A. Holman, Nathaniel G. Plant
2011, Journal of Geophysical Research C: Oceans (116)
A nonlinear model is developed to study the time‐dependent relationship between the alongshore variability of a sandbar, a(t), and alongshore‐averaged sandbar position, xc(t). Sediment transport equations are derived from energetics‐based formulations. A link between this continuous physical representation and a parametric form describing the migration of sandbars of constant shape is established...
Eruptive history of South Sister, Oregon Cascades
J. Fierstein, W. Hildreth, A.T. Calvert
2011, Journal of Volcanology and Geothermal Research (207) 145-179
South Sister is southernmost and highest of the Three Sisters, three geologically dissimilar stratovolcanoes that together form a spectacular 20km reach along the Cascade crest in Oregon. North Sister is a monotonously mafic edifice as old as middle Pleistocene, Middle Sister a basalt-andesite-dacite cone built between 48 and 14ka, and...
Are temperate mature forests buffered from invasive lianas?
Noel B. Pavlovic, Stacey A. Leicht-Young
2011, Journal of the Torrey Botanical Society (138) 85-92
Mature and old-growth forests are often thought to be buffered against invasive species due to low levels of light and infrequent disturbance. Lianas (woody vines) and other climbing plants are also known to exhibit lower densities in older forests. As part of a larger survey of the lianas of the...
Effects of reduction in porosity and permeability with depth on storage capacity and injectivity in deep saline aquifers: A case study from the Mount Simon Sandstone aquifer
C.R. Medina, J.A. Rupp, D.A. Barnes
2011, International Journal of Greenhouse Gas Control (5) 146-156
The Upper Cambrian Mount Simon Sandstone is recognized as a deep saline reservoir that has significant potential for geological sequestration in the Midwestern region of the United States. Porosity and permeability values collected from core analyses in rocks from this formation and its lateral equivalents in Indiana, Kentucky, Michigan, and...
An Analysis of the Published Mineral Resource Estimates of the Haji-Gak Iron Deposit, Afghanistan
David M. Sutphin, Karine Renaud, Lawrence J. Drew
2011, Natural Resources Research (20) 329-353
The Haji-Gak iron deposit of eastern Bamyan Province, eastern Afghanistan, was studied extensively and resource calculations were made in the 1960s by Afghan and Russian geologists. Recalculation of the resource estimates verifies the original estimates for categories A (in-place resources known in detail), B (in-place resources known in moderate detail),...
New insights of tsunami hazard from the 2011 Tohoku-oki event
K. Goto, C. Chague-Goff, S. Fujino, J. Goff, Bruce Jaffe, Y. Nishimura, Bruce M. Richmond, D. Sugawara, Witold Szczucinski, D.R. Tappin, Robert C. Witter, E. Yulianto
2011, Marine Geology (290) 46-50
We report initial results from our recent field survey documenting the inundation and resultant deposits of the 2011 Tohoku-oki tsunami from Sendai Plain, Japan. The tsunami inundated up to 4.5 km inland but the > 0.5 cm-thick sand deposit extended only 2.8 km (62% of the inundation distance). The deposit however continued as a...
Enhanced transpiration by riparian buffer trees in response to advection in a humid temperate agricultural landscape
V. Hernandez-Santana, H. Asbjornsen, T. Sauer, T. Isenhart, K. Schilling, Ronald Schultz
2011, Forest Ecology and Management (261) 1415-1427
Riparian buffers are designed as management practices to increase infiltration and reduce surface runoff and transport of sediment and nonpoint source pollutants from crop fields to adjacent streams. Achieving these ecosystem service goals depends, in part, on their ability to remove water from the soil via transpiration. In these systems,...
Evaluating the effect of predators on white-tailed deer: Movement and diet of coyotes
M.M. Turner, A.P. Rockhill, C.S. Deperno, J.A. Jenks, R. W. Klaver, A.R. Jarding, T.W. Grovenburg, K. H. Pollock
2011, Journal of Wildlife Management (75) 905-912
Coyotes (Canis latrans) may affect adult and neonate white-tailed deer (Odocoileus virginianus) survival and have been implicated as a contributor to the decline of deer populations. Additionally, coyote diet composition is influenced by prey availability, season, and region. Because coyote movement and diet vary by region, local data are important...
Late Quaternary environmental change inferred from phytoliths and other soil-related proxies: Case studies from the central and southern Great Plains, USA
C.E. Cordova, W.C. Johnson, R.D. Mandel, M.W. Palmer
2011, Catena (85) 87-108
This study investigates stable carbon isotopes (δ13C), opal phytolith assemblages, burnt phytoliths, microscopic charcoal and Sporormiella spores from modern soils and paleosols in Kansas and Oklahoma. Grass and dicot phytoliths in combination with δ13C are used as proxies for reconstructing the structure of grasslands and woodlands. Burnt grass phytoliths and microscopic charcoal...
Multimodel inference and adaptive management
S.E. Rehme, L.A. Powell, Craig R. Allen
2011, Journal of Environmental Management (92) 1360-1364
Ecology is an inherently complex science coping with correlated variables, nonlinear interactions and multiple scales of pattern and process, making it difficult for experiments to result in clear, strong inference. Natural resource managers, policy makers, and stakeholders rely on science to provide timely and accurate management recommendations. However, the time...
