Habitat use of woodpeckers in the Big Woods of eastern Arkansas
David G. Krementz, Sarah E. Lehnen, J.D. Luscier
2012, Journal of Fish and Wildlife Management (3) 89-97
The Big Woods of eastern Arkansas contain some of the highest densities of woodpeckers recorded within bottomland hardwood forests of the southeastern United States. A better understanding of habitat use patterns by these woodpeckers is a priority for conservationists seeking to maintain these high densities in the Big Woods and...
Sulfur dioxide emission rates from Kilauea Volcano, Hawaii, 2007-2010
T. Elias, A. J. Sutton
2012, Open-File Report 2012-1107
Kīlauea Volcano has one of the longest running volcanic sulfur dioxide (SO2) emission rate databases on record. Sulfur dioxide emission rates from Kīlauea Volcano were first measured by Stoiber and Malone (1975) and have been measured on a regular basis since 1979 (Elias and Sutton, 2007, and references within). Compilations...
Effects of lead on Na+, K+-ATPase and hemolymph ion concentrations in the freshwater mussel Elliptio complanata
Shad Mosher, W. Gregory Cope, Frank X. Weber, Damian Shea, Thomas J. Kwak
2012, Environmental Toxicology (27) 268-276
Freshwater mussels are an imperiled fauna exposed to a variety of environmental toxicants such as lead (Pb) and studies are urgently needed to assess their health and condition to guide conservation efforts. A 28-day laboratory toxicity test with Pb and adult Eastern elliptio mussels (Elliptio complanata) was conducted to determine...
Toward an understanding of disequilibrium dihedral angles in mafic rocks
Marian B. Holness, Madeleine C.S. Humphreys, Rachel Sides, Rosalind T. Helz, Christian Tegner
2012, Journal of Geophysical Research (117)
The median dihedral angle at clinopyroxene-plagioclase-plagioclase junctions in mafic rocks, Θcpp, is generally lower than equilibrium (109˚ {plus minus} 2˚). Observation of a wide range of mafic bodies demonstrates that previous work on systematic variations of Θcpp is incorrect in several important respects. Firstly, the spatial distribution of plagioclase compositional...
SIRT1 attenuates palmitate-induced endoplasmic reticulum stress and insulin resistance in HepG2 cells via induction of oxygen-regulated protein 150
T.W. Jung, K.T. Lee, Myung W. Lee, K.H. Ka
2012, Biochemical and Biophysical Research Communications (422) 229-232
Endoplasmic reticulum (ER) stress has been implicated in the pathology of type 2 diabetes mellitus (T2DM). Although SIRT1 has a therapeutic effect on T2DM, the mechanisms by which SIRT1 ameliorates insulin resistance (IR) remain unclear. In this study, we investigated the impact of SIRT1 on palmitate-induced ER stress in HepG2...
Comparison of stream invertebrate response models for bioassessment metric
Ian R. Waite, Jonathan G. Kennen, Jason T. May, Larry R. Brown, Thomas F. Cuffney, Kimberly A. Jones, James L. Orlando
2012, Journal of the American Water Resources Association (48) 570-583
We aggregated invertebrate data from various sources to assemble data for modeling in two ecoregions in Oregon and one in California. Our goal was to compare the performance of models developed using multiple linear regression (MLR) techniques with models developed using three relatively new techniques: classification and regression trees (CART),...
Uncertainty
Randall J. Hunt
2012, Book chapter, Australian groundwater modelling guidelines
Management decisions will often be directly informed by model predictions. However, we now know there can be no expectation of a single ‘true’ model; thus, model results are uncertain. Understandable reporting of underlying uncertainty provides necessary context to decision-makers, as model results are used for management decisions. This, in turn,...
Probabilistic estimates of surface coseismic slip and afterslip for Hayward fault earthquakes
Brad T. Aagaard, James J. Lienkaemper, David P. Schwartz
2012, Bulletin of the Seismological Society of America (102) 961-979
We examine the partition of long‐term geologic slip on the Hayward fault into interseismic creep, coseismic slip, and afterslip. Using Monte Carlo simulations, we compute expected coseismic slip and afterslip at three alinement array sites for Hayward fault earthquakes with nominal moment magnitudes ranging from about 6.5 to 7.1. We...
Monitoring glacier surface seismicity in time and space using Rayleigh waves
T. D. Mikesell, K. Van Wijk, Matthew M. Haney, J.H. Bradford, Hans P. Marshall, J. T. Harper
2012, Journal of Geophysical Research F: Earth Surface (117) 1-12
Sliding glaciers and brittle ice failure generate seismic body and surface wave energy characteristic to the source mechanism. Here we analyze continuous seismic recordings from an array of nine short-period passive seismometers located on Bench Glacier, Alaska (USA) (61.033°N, 145.687°W). We focus on the arrival-time and amplitude information of the...
Geologic map of the Hecate Chasma quadrangle (V-28), Venus
Ellen R. Stofan, John E. Guest, Antony W. Brian
2012, Scientific Investigations Map 3163
The Hecate Chasma quadrangle (V–28) extends from lat 0° to 25° N. and from long 240° E. to 270° E. The quadrangle was mapped at 1:5,000,000 scale as part of the National Aeronautics and Space Administration (NASA) Planetary Geologic Mapping Program. Hecate Chasma is an extensive rift system consisting of multiple...
On-line access to geoscience bibliographic citations
Emily C. Wild
2012, EXPLORE: Newsletter for the Association of Applied Geochemists (155) 1-4-5
On-line geoscience bibliographic citations and access points to citations are exponentially increasing as commercial, non-profit, and government agencies worldwide publish materials electronically. On-line bibliographic tools capture cited works, and open access content allows for freely obtained citations and documents. For this newsletter, citations from the numerous journals and books listed...
Metal dispersion resulting from mining activities in coastal environments: A pathways approach
Randolph A. Koski
2012, Oceanography (25) 170-183
Acid rock drainage (ARD) and disposal of tailings that result from mining activities impact coastal areas in many countries. The dispersion of metals from mine sites that are both proximal and distal to the shoreline can be examined using a pathways approach in which physical and chemical processes guide metal...
Uplift history of the Sila Massif, southern Italy, deciphered from cosmogenic 10Be erosion rates and river longitudinal profile analysis
Valerio Olivetti, Andrew J. Cyr, Paola Molin, Claudio Faccenna, Darryl E. Granger
2012, Tectonics (31)
The Sila Massif in the Calabrian Arc (southern Italy) is a key site to study the response of a landscape to rock uplift. Here an uplift rate of ∼1 mm/yr has imparted a deep imprint on the Sila landscape recorded by a high-standing low-relief surface on top of the massif,...
Estimations of evapotranspiration and water balance with uncertainty over the Yukon River Basin
Wenping Yuan, Shuguang Liu, Shunlin Liang, Zhengxi Tan, Heping Liu, Claudia Young
2012, Water Resources Management (26) 2147-2157
In this study, the revised Remote Sensing-Penman Monteith model (RS-PM) was used to scale up evapotranspiration (ET) over the entire Yukon River Basin (YRB) from three eddy covariance (EC) towers covering major vegetation types. We determined model parameters and uncertainty using a Bayesian-based method in the three EC sites. The...
Correlation of clayey gouge in a surface exposure of the San Andreas fault with gouge at depth from SAFOD: Implications for the role of serpentinite in fault mechanics
Diane E. Moore, Michael J. Rymer
2012, Journal of Structural Geology (38) 51-60
Magnesium-rich clayey gouge similar to that comprising the two actively creeping strands of the San Andreas Fault in drill core from the San Andreas Fault Observatory at Depth (SAFOD) has been identified in a nearby outcrop of serpentinite within the fault zone at Nelson Creek. Each occurrence of the gouge...
A direct-gradient multivariate index of biotic condition
Leandro E. Miranda, J.N. Aycock, K. J. Killgore
2012, Transactions of the American Fisheries Society (141) 1637-1648
Multimetric indexes constructed by summing metric scores have been criticized despite many of their merits. A leading criticism is the potential for investigator bias involved in metric selection and scoring. Often there is a large number of competing metrics equally well correlated with environmental stressors, requiring a judgment call by...
Novel microsatellite loci for studies of Thamnophis Gartersnake genetic identity and hybridization
Brian L. Sloss, Gregor W. Schuurman, Rori A. Paloski, Owen D. Boyle, Joshua M. Kapfer
2012, Conservation Genetics Resources (4) 383-386
Butler’s Gartersnakes (BGS; Thamnophis butleri) are confined to open and semi-open canopy wetlands and adjacent uplands, habitats under threat of development in Wisconsin. To address issues of species identity and putative hybridization with congeneric snakes, a suite of 18 microsatellite loci capable of cross-species amplification of Plains Gartersnakes...
Geophysical study of the San Juan Mountains batholith complex, southwestern Colorado
Benjamin J. Drenth, G. Randy Keller, Ren A. Thompson
2012, Geosphere (8) 669-684
One of the largest and most pronounced gravity lows over North America is over the rugged San Juan Mountains of southwestern Colorado (USA). The mountain range is coincident with the San Juan volcanic field (SJVF), the largest erosional remnant of a widespread mid-Cenozoic volcanic field that spanned much of the...
Reconstruction of past methane availability in an Arctic Alaska wetland indicates climate influenced methane release during the past ~12,000 years
Matthew J. Wooller, John W. Pohlman, Benjamin V. Gaglioti, Peter Langdon, Miriam Jones, Katey M. Walter Anthony, Kevin W. Becker, Kai-Uwe Hinrichs, Marcus Elvert
2012, Journal of Paleolimnology (48) 27-42
Atmospheric contributions of methane from Arctic wetlands during the Holocene are dynamic and linked to climate oscillations. However, long-term records linking climate variability to methane availability in Arctic wetlands are lacking. We present a multi-proxy ~12,000 year paleoecological reconstruction of intermittent methane availability from a radiocarbon-dated sediment core (LQ-West) taken...
New insights into the nation's carbon storage potential
Peter D. Warwick, Zhi-Liang Zhu
2012, Eos, Transactions, American Geophysical Union (93) 241-242
Carbon sequestration is a method of securing carbon dioxide (CO2) to prevent its release into the atmosphere, where it contributes to global warming as a greenhouse gas. Geologic storage of CO2 in porous and permeable rocks involves injecting high-pressure CO2 into a subsurface rock unit that has available pore space....
Geologic map of the Themis Regio quadrangle (V-53), Venus
Ellen R. Stofan, Antony W. Brian
2012, Scientific Investigations Map 3165
The Themis Regio quadrangle (V-53), Venus, has been geologically mapped at 1:5,000,000 scale as part of the NASA Planetary Geologic Mapping Program. The quadrangle extends from lat 25° to 50° S. and from long 270° to 300° E. and encompasses the Themis Regio highland, the surrounding plains, and the southernmost...
A Markov chain analysis of the movements of juvenile salmonids, including sockeye salmon, in the forebay of McNary Dam, Washington and Oregon, 2006-09
Noah S. Adams, Tyson W. Hatton
2012, Open-File Report 2012-1120
Passage and survival data were collected at McNary Dam between 2006 and 2009. These data have provided critical information for resource managers to implement structural and operational changes designed to improve the survival of juvenile salmonids as they migrate past the dam. Much of the valuable information collected at McNary...
A Markov chain analysis of the movements of juvenile salmonids in the forebay of McNary Dam, Washington and Oregon, 2006-09
Noah S. Adams, Tyson W. Hatton
2012, Open-File Report 2012-1119
Passage and survival data for yearling and subyearling Chinook salmon and juvenile steelhead were collected at McNary Dam between 2006 and 2009. These data have provided critical information for resource managers to implement structural and operational changes designed to improve the survival of juvenile salmonids as they migrate past the...
A baseline analysis of the distribution, host-range, and severity of the rust Puccinia Psidii in the Hawaiian islands, 2005-2010
Robert C. Anderson
2012, Report
Puccinia psidii was first described by Winter (1884) on guava (Psidium guajava L.) in Brazil. The rust is still a major pest of native guava in Brazil and is often referred to as “guava rust” internationally. It is unusual among rust fungi because of its broad and ever-expanding host-range within...
Spatial aspects of building and population exposure data and their implications for global earthquake exposure modeling
F. Dell’Acqua, P. Gamba, K. Jaiswal
2012, Natural Hazards
This paper discusses spatial aspects of the global exposure dataset and mapping needs for earthquake risk assessment. We discuss this in the context of development of a Global Exposure Database for the Global Earthquake Model (GED4GEM), which requires compilation of a multi-scale inventory of assets at risk, for example, buildings,...
