Sediment geochemistry of Corte Madera Marsh, San Francisco Bay, California: have local inputs changed, 1830-2010?
Renee K. Takesue, Bruce E. Jaffe
2013, Open-File Report 2013-1042
Large perturbations since the mid-1800s to the supply and source of sediment entering San Francisco Bay have disturbed natural processes for more than 150 years. Only recently have sediment inputs through the Sacramento-San Joaquin Delta (the Delta) decreased to what might be considered pre-disturbance levels. Declining sediment inputs to San...
Late Quaternary stream piracy and strath terrace formation along the Belle Fourche and lower Cheyenne Rivers, South Dakota and Wyoming
John F. Stamm, Robert R. Hendricks, J. Foster Sawyer, Shannon Mahan, Brent J. Zaprowski, Nicholas M. Geibel, David C. Azzolini
2013, Geomorphology (197) 10-20
Stream piracy substantially affected the geomorphic evolution of the Missouri River watershed and drainages within, including the Little Missouri, Cheyenne, Belle Fourche, Bad, and White Rivers. The ancestral Cheyenne River eroded headward in an annular pattern around the eastern and southern Black Hills and pirated the headwaters of the ancestral...
A conceptual framework for Lake Michigan coastal/nearshore ecosystems, with application to Lake Michigan Lakewide Management Plan (LaMP) objectives
Paul W. Seelbach, Lisa R. Fogarty, David Bo Bunnell, Sheridan K. Haack, Mark W. Rogers
2013, Open-File Report 2013-1138
The Lakewide Management Plans (LaMPs) within the Great Lakes region are examples of broad-scale, collaborative resource-management efforts that require a sound ecosystems approach. Yet, the LaMP process is lacking a holistic framework that allows these individual actions to be planned and understood within the broader context of the Great Lakes...
Springs, streams, and gas vent on and near Mount Adams volcano, Washington
Manuel Nathenson, Robert H. Mariner
2013, Scientific Investigations Report 2013-5097
Springs and some streams on Mount Adams volcano have been sampled for chemistry and light stable isotopes of water. Spring temperatures are generally cooler than air temperatures from weather stations at the same elevation. Spring chemistry generally reflects weathering of volcanic rock from dissolved carbon dioxide. Water in some springs...
Potential effects of deepening the St. Johns River navigation channel on saltwater intrusion in the surficial aquifer system, Jacksonville, Florida
Jason C. Bellino, Rick M. Spechler
2013, Scientific Investigations Report 2013-5146
The U.S. Army Corps of Engineers (USACE) has proposed dredging a 13-mile reach of the St. Johns River navigation channel in Jacksonville, Florida, deepening it to depths between 50 and 54 feet below North American Vertical Datum of 1988. The dredging operation will remove about 10 feet of sediments from...
Fatty acid composition at the base of aquatic food webs is influenced by habitat type and watershed land use
James H. Larson, William B. Richardson, Brent C. Knights, Lynn Bartsch, Michelle Bartsch, J. C. Nelson, Jason A. Veldboom, Jonathan M. Vallazza
2013, PLoS ONE (8)
Spatial variation in food resources strongly influences many aspects of aquatic consumer ecology. Although large-scale controls over spatial variation in many aspects of food resources are well known, others have received little study. Here we investigated variation in the fatty acid (FA) composition of seston and primary consumers within (i.e.,...
Post-earthquake building safety inspection: Lessons from the Canterbury, New Zealand, earthquakes
J. Marshall, Kishor S. Jaiswal, N. Gould, F. Turner, B. Lizundia, J. Barnes
2013, Earthquake Spectra (29) 1091-1107
The authors discuss some of the unique aspects and lessons of the New Zealand post-earthquake building safety inspection program that was implemented following the Canterbury earthquake sequence of 2010–2011. The post-event safety assessment program was one of the largest and longest programs undertaken in recent times anywhere in the world....
Frictional-faulting model for harmonic tremor before Redoubt Volcano eruptions
Ksenia Dmitrieva, Alicia J. Hotovec-Ellis, Stephanie G. Prejean, Eric M. Dunham
2013, Nature Geoscience (6) 652-656
Seismic unrest, indicative of subsurface magma transport and pressure changes within fluid-filled cracks and conduits, often precedes volcanic eruptions. An intriguing form of volcano seismicity is harmonic tremor, that is, sustained vibrations in the range of 0.5–5 Hz. Many source processes can generate harmonic tremor. Harmonic tremor in the 2009 eruption...
Refinement of late-Early and Middle Miocene diatom biostratigraphy for the east coast of the United States
John A. Barron, James Browning, Peter Sugarman, Kenneth G. Miller
2013, Geosphere (9) 1286-1302
Integrated Ocean Drilling Program (IODP) Expedition 313 continuously cored Lower to Middle Miocene sequences at three continental shelf sites off New Jersey, USA. The most seaward of these, Site M29, contains a well-preserved Early and Middle Miocene succession of planktonic diatoms that have been independently correlated with the geomagnetic polarity...
Eastern musk turtle (Sternotherus odoratus)
Brad M. Glorioso
2013, Book chapter, The Reptiles of Tennessee
No abstract available....
Seasonal flux and assemblage composition of planktic foraminifera from the northern Gulf of Mexico, 2008-11
Caitlin E. Reynolds, Richard Z. Poore
2013, Open-File Report 2013-1158
The U.S. Geological Survey anchored a sediment trap in the northern Gulf of Mexico to collect seasonal time-series data on the flux and assemblage composition of live planktic foraminifers. This report provides an update of the previous time-series data to include results from 2011. Ten species, or varieties, constituted ~92...
Ecological correlates of variable organ sizes and fat loads in the most northerly-wintering shorebirds
Daniel R. Ruthrauff, Anne Dekinga, Robert E. Gill Jr., R.W. Summers, Theunis Piersma
2013, Canadian Journal of Zoology (91) 698-705
Shorebirds at northern latitudes during the nonbreeding season typically carry relatively large lipid stores and exhibit an up-regulation of lean tissues associated with digestion and thermogenesis. Intraspecific variation in these tissues across sites primarily reflects differences in environmental conditions. Rock (Calidris ptilocnemis (Coues, 1873)) and Purple (Calidris maritima (Brünnich, 1764))...
A wetting and drying scheme for ROMS
John C. Warner, Zafer Defne, Kevin Haas, Hernan G. Arango
2013, Computers & Geosciences (58) 54-61
The processes of wetting and drying have many important physical and biological impacts on shallow water systems. Inundation and dewatering effects on coastal mud flats and beaches occur on various time scales ranging from storm surge, periodic rise and fall of the tide, to infragravity wave motions. To correctly simulate...
Lidar-derived estimate and uncertainty of carbon sink in successional phases of woody encroachment
Temuulen Sankey, Rupesh Shrestha, Joel B. Sankey, Stuart Hardgree, Eva Strand
2013, Journal of Geophysical Research: Biogeosciences (118) 1144-1155
Woody encroachment is a globally occurring phenomenon that contributes to the global carbon sink. The magnitude of this contribution needs to be estimated at regional and local scales to address uncertainties present in the global- and continental-scale estimates, and guide regional policy and management in balancing restoration activities, including removal...
Key landscape ecology metrics for assessing climate change adaptation options: Rate of change and patchiness of impacts
Laura López-Hoffman, David D. Breshears, Craig D. Allen, Marc L. Miller
2013, Ecosphere (4)
Under a changing climate, devising strategies to help stakeholders adapt to alterations to ecosystems and their services is of utmost importance. In western North America, diminished snowpack and river flows are causing relatively gradual, homogeneous (system-wide) changes in ecosystems and services. In addition, increased climate variability is also accelerating the...
Updated methodology for nuclear magnetic resonance characterization of shales
Kathryn E. Washburn, Justin E. Birdwell
2013, Journal of Magnetic Resonance (233) 17-28
Unconventional petroleum resources, particularly in shales, are expected to play an increasingly important role in the world’s energy portfolio in the coming years. Nuclear magnetic resonance (NMR), particularly at low-field, provides important information in the evaluation of shale resources. Most of the low-field NMR analyses performed on shale samples rely...
Land-cover change in the conterminous United States from 1973 to 2000
Benjamin M. Sleeter, Terry L. Sohl, Thomas R. Loveland, Roger F. Auch, William Acevedo, Mark A. Drummond, Kristi L. Sayler, Stephen V. Stehman
2013, Global Environmental Change (23) 733-748
Land-cover change in the conterminous United States was quantified by interpreting change from satellite imagery for a sample stratified by 84 ecoregions. Gross and net changes between 11 land-cover classes were estimated for 5 dates of Landsat imagery (1973, 1980, 1986, 1992, and 2000). An estimated 673,000 km2(8.6%) of the...
Mapping risk of avian influenza transmission at the interface of domestic poultry and wild birds
Diann J. Prosser, Laura L. Hungerford, R. Michael Erwin, Mary Ann Ottinger, John Y. Takekawa, Erle C. Ellis
2013, Frontiers in Public Health (1)
Emergence of avian influenza viruses with high lethality to humans, such as the currently circulating highly pathogenic A(H5N1) (emerged in 1996) and A(H7N9) cause serious concern for the global economic and public health sectors. Understanding the spatial and temporal interface between wild and domestic populations, from which these viruses emerge,...
Food-web dynamics in a large river discontinuum
Wyatt F. Cross, Colden V. Baxter, Emma J. Rosi-Marshall, Robert O. Hall Jr., Theodore A. Kennedy, Kevin C. Donner, Holly A. Wellard Kelly, Sarah E.Z. Seegert, Kathrine E. Behn, Michael D. Yard
2013, Ecological Monographs (83) 311-337
Nearly all ecosystems have been altered by human activities, and most communities are now composed of interacting species that have not co-evolved. These changes may modify species interactions, energy and material flows, and food-web stability. Although structural changes to ecosystems have been widely reported, few studies have linked such changes...
On the twenty-first-century wet season projections over the Southeastern United States
Christopher Selman, Vasu Misra, Lydia Stefanova, Steven Dinapoli, Thomas J. Smith III
2013, Regional Environmental Change (13) 153-164
This paper reconciles the difference in the projections of the wet season over the Southeastern United States (SEUS) from a global climate model (the Community Climate System Model Version 3 [CCSM3]) and from a regional climate model (the Regional Spectral Model [RSM]) nested in the CCSM3. The CCSM3 projects a...
Geologic occurrences of erionite in the United States: an emerging national public health concern for respiratory disease
Bradley S. Van Gosen, Thomas A. Blitz, Geoffrey S. Plumlee, Gregory P. Meeker, M. Patrick Pierson
2013, Environmental Geochemistry and Health (35) 419-430
Erionite, a mineral series within the zeolite group, is classified as a Group 1 known respiratory carcinogen. This designation resulted from extremely high incidences of mesothelioma discovered in three small villages from the Cappadocia region of Turkey, where the disease was linked to environmental exposures to fibrous forms of erionite....
The variability of California summertime marine stratus: impacts on surface air temperatures
Sam F. Iacobellis, Daniel R. Cayan
2013, Journal of Geophysical Research D: Atmospheres (118) 9105-9122
This study investigates the variability of clouds, primarily marine stratus clouds, and how they are associated with surface temperature anomalies over California, especially along the coastal margin. We focus on the summer months of June to September when marine stratus are the dominant cloud type. Data used include satellite cloud...
Comparison of age distributions estimated from environmental tracers by using binary-dilution and numerical models of fractured and folded karst: Shenandoah Valley of Virginia and West Virginia, USA
Richard M. Yager, Niel Plummer, Leon J. Kauffman, Daniel H. Doctor, David L. Nelms, Peter Schlosser
2013, Hydrogeology Journal (21) 1193-1217
Measured concentrations of environmental tracers in spring discharge from a karst aquifer in the Shenandoah Valley, USA, were used to refine a numerical groundwater flow model. The karst aquifer is folded and faulted carbonate bedrock dominated by diffuse flow along fractures. The numerical model represented bedrock structure and discrete features...
Geochemical and isotopic variations in shallow groundwater in areas of the Fayetteville Shale development, north-central Arkansas
Nathaniel R. Warner, Timothy M. Kresse, Phillip D. Hays, Adrian Down, Jonathan D. Karr, R.B. Jackson, Avner Vengosh
2013, Applied Geochemistry (35) 207-220
Exploration of unconventional natural gas reservoirs such as impermeable shale basins through the use of horizontal drilling and hydraulic fracturing has changed the energy landscape in the USA providing a vast new energy source. The accelerated production of natural gas has triggered a debate concerning the safety and possible environmental...
Blood mineral concentrations in manatees (Trichechus manatus latirostris and Trichechus manatus manatus)
J. Siegal-Willott, Kendal E. Harr, Jeffery O. Hall, Lee-Ann C. Hayek, Nicole Auil-Gomez, James A. Powell, Robert K. Bonde, Darryl Heard
2013, Journal of Zoo and Wildlife Medicine (44) 285-894
Limited information is available regarding the role of minerals and heavy metals in the morbidity and mortality of manatees. Whole-blood and serum mineral concentrations were evaluated in apparently healthy, free-ranging Florida (Trichechus manatus latirostris, n = 31) and Belize (Trichechus manatus manatus, n = 14) manatees. Toxicologic statuses of the...
