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...
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...
The 2007 Nazko, British Columbia, earthquake sequence: Injection of magma deep in the crust beneath the Anahim volcanic belt
J.F. Cassidy, N. Balfour, C. Hickson, H. Kao, Rickie White, J. Caplan-Auerbach, S. Mazzotti, Gary C. Rogers, I. Al-Khoubbi, A.L. Bird, L. Esteban, M. Kelman, J. Hutchinson, D. McCormack
2011, Bulletin of the Seismological Society of America (101) 1732-1741
On 9 October 2007, an unusual sequence of earthquakes began in central British Columbia about 20 km west of the Nazko cone, the most recent (circa 7200 yr) volcanic center in the Anahim volcanic belt. Within 25 hr, eight earthquakes of magnitude 2.3-2.9 occurred in a region where no earthquakes...
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...
Mechanism of the 1996-97 non-eruptive volcano-tectonic earthquake swarm at Iliamna Volcano, Alaska
Diana Roman, John A. Power
2011, Bulletin of Volcanology (73) 143-153
A significant number of volcano-tectonic (VT) earthquake swarms, some of which are accompanied by ground deformation and/or volcanic gas emissions, do not culminate in an eruption. These swarms are often thought to represent stalled intrusions of magma into the mid- or shallow-level crust. Real-time assessment of the likelihood that a...
Post-breeding bird responses to canopy tree retention, stand size, and edge in regenerating Appalachian hardwood stands
Molly E. McDermott, Petra B. Wood
2011, Forest Ecology and Management (262) 547-554
Avian use of even-aged timber harvests is likely affected by stand attributes such as size, amount of edge, and retained basal area, all characteristics that can easily be manipulated in timber harvesting plans. However, few studies have examined their effects during the post-breeding period. We studied the impacts of clearcut,...
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...
Making United States Integrated Ocean Observing System (U.S. IOOS) inclusive of marine biological resources
H. Moustahfid, J. Potemra, P. Goldstein, R. Mendelssohn, A. Desrochers
2011, Conference Paper, OCEANS'11 - MTS/IEEE Kona, Program Book
An important Data Management and Communication (DMAC) goal is to enable a multi-disciplinary view of the ocean environment by facilitating discovery and integration of data from various sources, projects and scientific domains. United States Integrated Ocean Observing System (U.S. IOOS) DMAC functional requirements are based upon guidelines for standardized data...
Use of habitats by female mallards wintering in Southwestern Louisiana
Paul T. Link, A. D. Afton, R. R. Cox Jr., B.E. Davis
2011, Waterbirds (34) 429-438
Habitat use by wintering Mallards (Anas platyrhychos) on the Gulf Coast Chenier Plain (GCCP) has received little study and quantitative data is needed for management of GCCP waterfowl. Radio-telemetry techniques were used to record habitats used by 135 female Mallards during winters 2004-2005 and 2005-2006 in south-western Louisiana. Habitat use...
Cougar survival and source-sink structure on Greater Yellowstone's Northern Range
T.K. Ruth, M.A. Haroldson, K.M. Murphy, P.C. Buotte, M.G. Hornocker, H.B. Quigley
2011, Journal of Wildlife Management (75) 1381-1398
We studied survival and causes of mortality of radiocollared cougars (Puma concolor) on the Greater Yellowstone Northern Range (GYNR) prior to (1987–1994) and after wolf (Canis lupus) reintroduction (1998–2005) and evaluated temporal, spatial, and environmental factors that explain variation in adult, subadult, and kitten survival. Using Program MARK and multimodel...
Fire, grazing history, lichen abundance, and winter distribution of caribou in Alaska's taiga
William B. Collins, Bruce W. Dale, Layne G. Adams, Darien E. McElwain, Kyle Joly
2011, Journal of Wildlife Management (75) 369-377
In the early 1990s the Nelchina Caribou (Rangifer tarandus) Herd (NCH) began a dramatic shift to its current winter range, migrating at least an additional 100 km beyond its historic range. We evaluated the impacts of fire and grazing history on lichen abundance and subsequent use and distribution by the NCH....
Watershed morphology of highland and mountain ecoregions in eastern Oklahoma
D. K. Splinter, Daniel C. Dauwalter, R. A. Marston, William Fisher
2011, Professional Geographer (63) 131-143
The fluvial system represents a nested hierarchy that reflects the relationship among different spatial and temporal scales. Within the hierarchy, larger scale variables influence the characteristics of the next lower nested scale. Ecoregions represent one of the largest scales in the fluvial hierarchy and are defined by recurring patterns of...
Downhole well log and core montages from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
Timothy S. Collett, R.E. Lewis, William J. Winters, Myung W. Lee, K.K. Rose, R.M. Boswell
2011, Marine and Petroleum Geology (28) 561-577
The BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well was an integral part of an ongoing project to determine the future energy resource potential of gas hydrates on the Alaska North Slope. As part of this effort, the Mount Elbert well included an advanced downhole geophysical logging program. Because gas...
Permafrost-associated natural gas hydrate occurrences on the Alaska North Slope
Timothy S. Collett, Myung W. Lee, Warren F. Agena, John J. Miller, Kristen A. Lewis, M.V. Zyrianova, R. Boswell, T.L. Inks
2011, Marine and Petroleum Geology (28) 279-294
In the 1960s Russian scientists made what was then a bold assertion that gas hydrates should occur in abundance in nature. Since this early start, the scientific foundation has been built for the realization that gas hydrates are a global phenomenon,...
King eider foraging effort during the pre-breeding period in Alaska
Steffen Oppel, Abby N. Powell, Malcolm G. Butler
2011, The Condor (113) 52-60
For reproduction, many arctic-nesting migratory birds rely on nutrients obtained on the breeding grounds, so they devote sufficient time to foraging immediately prior to nesting. However, little is known about the increase in foraging effort necessary to meet the energetic requirements of reproduction. In early June 2006 and 2008, we...
Links between type E botulism outbreaks, lake levels, and surface water temperatures in Lake Michigan, 1963-2008
Brenda Moraska Lafrancois, Stephen C. Riley, David S. Blehert, Anne E. Ballmann
2011, Journal of Great Lakes Research (37) 86-91
Relationships between large-scale environmental factors and the incidence of type E avian botulism outbreaks in Lake Michigan were examined from 1963 to 2008. Avian botulism outbreaks most frequently occurred in years with low mean annual water levels, and lake levels were significantly lower in outbreak years than in non-outbreak years....
Diet and gut morphology of male mallards during winter in North Dakota
R.E. Olsen, R. R. Cox Jr., A. D. Afton, C.D. Ankney
2011, Waterbirds (34) 59-69
A free-ranging Mallard (Anas platyrhynchos) population was investigated during winter (December-January 1996-1999) below the Garrison Dam, North Dakota, USA, to relate diet to gut morphology variation in males. Four explanatory variables (fish consumption, male age, winter, and body size) were evaluated as to whether they influenced five response variables associated...
Sulfur in the South Florida ecosystem: Distribution, sources, biogeochemistry, impacts, and management for restoration
William H. Orem, C. Gilmour, D. Axelrad, David P. Krabbenhoft, D. Scheidt, P. Kalla, P. McCormick, M. Gabriel, George Aiken
2011, Critical Reviews in Environmental Science and Technology (41) 249-288
Sulfur is broadly recognized as a water quality issue of significance for the freshwater Florida Everglades. Roughly 60% of the remnant Everglades has surface water sulfate concentrations above 1 mg l-1, a restoration performance measure based on present sulfate levels in unenriched areas. Highly enriched marshes in the northern Everglades...
Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers
A.D. Dybowska, Marie Noele Croteau, S.K. Misra, D. Berhanu, Samuel N. Luoma, P. Christian, P. O'Brien, E. Valsami-Jones
2011, Environmental Pollution (159) 266-273
Understanding the behavior of engineered nanoparticles in the environment and within organisms is perhaps the biggest obstacle to the safe development of nanotechnologies. Reliable tracing is a particular issue for nanoparticles such as ZnO, because Zn is an essential element and a common pollutant thus present at elevated background concentrations. We synthesized isotopically...
Understanding the role of fog in forest hydrology: Stable isotopes as tools for determining input and partitioning of cloud water in montane forests
Martha A. Scholl, W. Eugster, R. Burkard
2011, Hydrological Processes (25) 353-366
Understanding the hydrology of tropical montane cloud forests (TMCF) has become essential as deforestation of mountain areas proceeds at an increased rate worldwide. Passive and active cloud‐water collectors, throughfall and stemflow collectors, visibility or droplet size measurements, and micrometeorological sensors are typically used to measure the fog water inputs to...
Developing empirical collapse fragility functions for global building types
K. Jaiswal, D. Wald, D. D’Ayala
2011, Earthquake Spectra (27) 775-795
Building collapse is the dominant cause of casualties during earthquakes. In order to better predict human fatalities, the U.S. Geological Survey’s Prompt Assessment of Global Earthquakes for Response (PAGER) program requires collapse fragility functions for global building types. The collapse fragility is expressed as the probability of collapse at discrete...
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,...
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)...
