The Cambrian-Ordovician rocks of Sonora, Mexico, and southern Arizona, southwestern margin of North America (Laurentia)
William R. Page, Alta C. Harris, John E. Repetski
James R. Derby, R.D. Fritz, S.A. Longacre, W.A. Morgan, C.A. Sternbach, editor(s)
2013, Book chapter, The great American carbonate bank: The geology and economic resources of the Cambrian-Ordovician Sauk megasequence of Laurentia
Cambrian and Ordovician shelf, platform, and basin rocks are present in Sonora, Mexico, and southern Arizona and were deposited on the southwestern continental margin of North America (Laurentia). Cambrian and Ordovician rocks in Sonora, Mexico, are mostly exposed in scattered outcrops in the northern half of the state. Their discontinuous nature results...
Assessing winter cover crop nutrient uptake efficiency using a water quality simulation model
In-Young Yeo, Sangchui Lee, Ali M. Sadeghi, Peter C. Beeson, W. Dean Hively, Greg W. McCarty, Megan W. Lang
2013, Hydrology and Earth System Sciences (10) 14229-14263
Winter cover crops are an effective conservation management practice with potential to improve water quality. Throughout the Chesapeake Bay Watershed (CBW), which is located in the Mid-Atlantic US, winter cover crop use has been emphasized and federal and state cost-share programs are available to farmers to subsidize the cost of...
Genetic structure of the Common Eider in the western Aleutian Islands prior to fox eradication
Sarah A. Sonsthagen, Sandra L. Talbot, Robert E. Wilson, Margaret R. Petersen, Jeffrey C. Williams, G. Vernon Byrd, Kevin G. McCracken
2013, The Condor (115) 28-39
Since the late 18th century bird populations residing in the Aleutian Archipelago have been greatly reduced by introduced arctic foxes (Alopex lagopus). We analyzed data from microsatellite, nuclear intron, and mitochondrial (mtDNA) loci to examine the spatial genetic structure, demography, and gene flow among four Aleutian Island populations of the Common...
Distribution of burrowing owls in east-central South Dakota
Jill A. Shaffer, Jason P. Thiele
2013, The Prairie Naturalist (45) 60-64
Western burrowing owl (Athene cunicularia hypugaea) populations have declined across much of western North America, particularly at the northern and eastern edges of the species’ breeding range (Martell et al. 2001, Murphy et al. 2001, Shyry et al. 2001, Skeel et al. 2001, Klute et al. 2003). In South Dakota,...
Megacity megaquakes—Two near misses
Ross S. Stein, Shinji Toda
2013, Science (341) 850-852
Two recent earthquakes left their mark on Santiago de Chile and Tokyo, well beyond the rupture zones, raising questions about the future vulnerability of these and other cities that lie in seismically active regions. Though spared strong shaking, the megacities nevertheless lit up in small quakes, perhaps signaling an abrupt...
Wildfire and aspect effects on hydrologic states after the 2010 Fourmile Canyon Fire
Brian A. Ebel
2013, Vadose Zone Journal (12)
Wildfire can change how soils take in, store, and release water. This study examined differences in how burned and unburned plots on north versus south-facing slope aspects respond to rainfall. The largest wildfire impacts were litter/duff combustion on burned north-facing slopes versus soil-water retention reduction on burned south-facing slopes.Wildfire is...
Research strategies for addressing uncertainties
David E. Busch, Levi D. Brekke, Kristen Averyt, Angela Jardine, Leigh Welling
Gregg Garfin, Angela Jardine, Robert W. Merideth, Mary Black, Sarah LeRoy, editor(s)
2013, Book chapter, Assessment of climate change in southwest United States: a report prepared for the National Climate Assessment
Research Strategies for Addressing Uncertainties builds on descriptions of research needs presented elsewhere in the book; describes current research efforts and the challenges and opportunities to reduce the uncertainties of climate change; explores ways to improve the understanding of changes in climate and hydrology; and emphasizes the use of research...
Pre-eruptive magmatic conditions at Augustine Volcano, Alaska, 2006: Evidence from amphibole geochemistry and textures
Sarah De Angelis, Jessica D Larsen, Michelle L. Coombs
2013, Journal of Petrology (54) 1939-1961
Variations in the geochemistry and texture of amphibole phenocrysts erupted from Augustine Volcano in 2006 provide new insights into pre- and syn-eruptive magma storage and mixing. Amphiboles are rare but present in all magma compositions (low- to high-silica andesites) from the 3 month long eruption. Unzoned magnesiohornblende in the high-...
Tampa Bay
Larry Handley, Kathryn Spear, Lindsay Cross, René Baumstark, Ryan Moyer, Cindy A. Thatcher
2013, Book chapter, Emergent wetlands status and trends in the northern Gulf of Mexico 1950-2010
No abstract available....
Hydrologic connectivity to streams increases nitrogen and phosphorus inputs and cycling in soils of created and natural floodplain wetlands
Kristin L. Wolf, Gregory E. Noe, Changwoo Ahn
2013, Journal of Environmental Quality (42) 1245-1255
Greater connectivity to stream surface water may result in greater inputs of allochthonous nutrients that could stimulate internal nitrogen (N) and phosphorus (P) cycling in natural, restored, and created riparian wetlands. This study investigated the effects of hydrologic connectivity to stream water on soil nutrient fluxes in plots (n =...
Coasts: Complex changes affecting the Northwest's diverse shorelines
W. Spencer Reeder, Ruggiero Peter, Sarah L. Shafer, Amy K. Snover, Laurie L. Houston, Patty Glick, Jan Newton, Susan M. Capalbo
2013, Book chapter, Climate change in the Northwest: Implications for our landscapes, waters, and communities
No abstract available....
Ion-probe U–Pb dating of authigenic and detrital opal from Neogene-Quaternary alluvium
Leonid A. Neymark, James B. Paces
2013, Earth and Planetary Science Letters (361) 98-109
Knowing depositional ages of alluvial fans is essential for many tectonic, paleoclimatic, and geomorphic studies in arid environments. The use of U–Pb dating on secondary silica to establish the age of Neogene-Quaternary clastic sediments was tested on samples of authigenic and detrital opal and chalcedony from depths of ∼25...
A Method for Telemetry-based Logging of Animal Activity
B. Lardner, J. A. Savidge, R.N. Reed, G.H. Rodda
2013, Herpetological Review
Topological and canonical kriging for design flood prediction in ungauged catchments: an improvement over a traditional regional regression approach?
Stacey A. Archfield, Alessio Pugliese, Attilio Castellarin, Jon O. Skoien, Julie E. Kiang
2013, Hydrology and Earth System Sciences (17) 1575-1588
In the United States, estimation of flood frequency quantiles at ungauged locations has been largely based on regional regression techniques that relate measurable catchment descriptors to flood quantiles. More recently, spatial interpolation techniques of point data have been shown to be effective for predicting streamflow statistics (i.e., flood flows and...
Strategies for rapid global earthquake impact estimation: the Prompt Assessment of Global Earthquakes for Response (PAGER) system
Kishor Jaiswal, D.J. Wald
2013, Book chapter, Handbook of seismic risk analysis and management of civil infrastructure systems
This chapter summarizes the state-of-the-art for rapid earthquake impact estimation. It details the needs and challenges associated with quick estimation of earthquake losses following global earthquakes, and provides a brief literature review of various approaches that have been used in the past. With this background, the chapter introduces the operational...
Red-backed vole brain promotes highly efficient in vitro amplification of abnormal prion protein from macaque and human brains infected with variant Creutzfeldt-Jakob disease agent.
Julie Nemecek, Nabanita Nag, Christina M. Carlson, Jay R. Schneider, Dennis M. Heisey, Christopher J. Johnson, David M. Asher, Luisa Gregori
2013, PLoS ONE (8)
Rapid antemortem tests to detect individuals with transmissible spongiform encephalopathies (TSE) would contribute to public health. We investigated a technique known as protein misfolding cyclic amplification (PMCA) to amplify abnormal prion protein (PrPTSE) from highly diluted variant Creutzfeldt-Jakob disease (vCJD)-infected human and macaque brain homogenates, seeking to improve the rapid...
Enhanced transfer of terrestrially derived carbon to the atmosphere in a flooding event
Thomas S. Bianchi, Fenix Garcia-Tigreros, Shari A. Yvon-Lewis, Michael Shields, Heath J. Mills, David Butman, Christopher Osburn, Peter A. Raymond, G. Christopher Shank, Steven F. DiMarco, Nan Walker, Brandi Kiel Reese, Ruth Mullins-Perry, Antonietta Quigg, George R. Aiken, Ethan L. Grossman
2013, Geophysical Research Letters (40) 116-122
Rising CO2 concentration in the atmosphere, global climate change, and the sustainability of the Earth's biosphere are great societal concerns for the 21st century. Global climate change has, in part, resulted in a higher frequency of flooding events, which allow for greater exchange between soil/plant litter and aquatic carbon pools. Here...
Eighth Landsat satellite becomes operational
J. R. Irons, Thomas R. Loveland
2013, Photogrammetric Engineering and Remote Sensing (79) 398-401
No abstract available....
Transport and fate of microbial pathogens in agricultural settings
Scott A. Bradford, Veronica L. Morales, Wei Zhang, Ronald W. Harvey, Aaron I. Packman, Arvind Mohanram, Claire Welty
2013, Critical Reviews in Environmental Science and Technology (43) 775-893
An understanding of the transport and survival of microbial pathogens (pathogens hereafter) in agricultural settings is needed to assess the risk of pathogen contamination to water and food resources, and to develop control strategies and treatment options. However, many knowledge gaps still remain in predicting the fate and transport of...
Characterizing LEDAPS surface reflectance products by comparisons with AERONET, field spectrometer, and MODIS data
Tom Maiersperger, Pat Scaramuzza, Larry Leigh, S. Shrestha, Kevin Gallo, Calli B. Jenkerson, John L. Dwyer
2013, Remote Sensing of Environment (136) 1-13
This study provides a baseline quality check on provisional Landsat Surface Reflectance (SR) products as generated by the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center using Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software. Characterization of the Landsat SR products leveraged comparisons between aerosol optical thickness...
Regulation of striped bass and hybrid striped bass fisheries in the United States
William R. Collier, Phillip William Bettoli, George D. Scholten, Timothy N. Churchill
2013, American Fisheries Society Symposium (80)
No abstract available....
Projecting the land cover change and its environmental impacts in the Cedar River Basin in the Midwestern United States
Yiping Wu, Shuguang Liu, Terry L. Sohl, Claudia Young
2013, Environmental Research Letters (8) 1-13
The physical surface of the Earth is in constant change due to climate forcing and human activities. In the Midwestern United States, urban area, farmland, and dedicated energy crop (e.g., switchgrass) cultivation are predicted to expand in the coming decades, which will lead to changes in hydrological processes. This study...
Rethinking infiltration in wildfire-affected soils
Brian A. Ebel, John A. Moody
2013, Hydrological Processes (27) 1510-1514
Wildfires frequently result in natural hazards such as flash floods (Yates et al., 2001) and debris flows (Cannon et al., 2001a,b; Gabet and Sternberg, 2008). One of the principal causes of the increased risk of post-wildfire hydrologically driven hazards is reduced in filtration rates (e.g. Scott and van Wyk, 1990;...
Reforestation to enhance Appalachian mined lands as habitat for terrestrial wildlife
Petra B. Wood, Jeff Larkin, Jeremy Mizel, Carl E. Zipper, Patrick Angel
2013, Forest Reclamation Advisory 10
Surface mining is widespread throughout the Appalachian coalfield, a region with extensive forests that are rich in wildlife. Game species for hunting, non-game wildlife species, and other organisms are important contributors to sustainable and productive ecosystems. Although small breaks in the forest canopy are important to wildlife diversity, most native...
Use of gene-expression programming to estimate Manning’s roughness coefficient for high gradient streams
H. Azamathulla, Robert D. Jarrett
2013, Water Resources Management (27) 715-729
Manning’s roughness coefficient (n) has been widely used in the estimation of flood discharges or depths of flow in natural channels. Therefore, the selection of appropriate Manning’s nvalues is of paramount importance for hydraulic engineers and hydrologists and requires considerable experience, although extensive guidelines are available. Generally,...
