Basin-floor Lake Bonneville stratigraphic section as revealed in paleoseismic trenches at the Baileys Lake site, West Valley fault zone, Utah
Michael D. Hylland, Christopher B. DuRoss, Greg N. McDonald, Susan S. Olig, Charles G. Oviatt, Shannon A. Mahan, Anthony J. Crone, Stephen Personius
2012, Book chapter, Selected topics in engineering and environmental geology in Utah
Recent paleoseismic trenching on the Granger fault of the West Valley fault zone in Salt Lake County, Utah, exposed a nearly complete section of late Pleistocene Lake Bonneville deposits, and highlights challenges related to accurate interpretation of basin-floor stratigraphy in the absence of numerical age constraints. We used radiocarbon and...
Nest defense- Grassland bird responses to snakes
Kevin S. Ellison, Christine Ribic
2012, Studies in Avian Biology (43) 149-159
Predation is the primary source of nest mortality for most passerines; thus, behaviors to reduce the impacts of predation are frequently quantified to study learning, adaptation, and coevolution among predator and prey species. Video surveillance of nests has made it possible to examine real-time parental nest defense. During 1999-2009, we...
Communicating science: from cuneiform to the contemporary and beyond
Cecil A. Jennings
Cecil A. Jennings, Thomas E. Lauer, Bruce C. Vondracek, editor(s)
2012, Book chapter, Scientific Communication for Natural Resource Professionals
No abstract available....
Near‐surface void detection using a seismic landstreamer and horizontal velocity and attenuation tomography
Sean F. Buckley, John W. Lane Jr.
2012, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2012
The detection and characterization of subsurface voids plays an important role in the study of karst formations and clandestine tunnels. Horizontal velocity and attenuation tomography (HVAT) using offset‐fan shooting and a towed seismic land streamer is a simple, rapid, minimally invasive method that shows promise for detecting near‐surface voids and...
Estimating White-tailed Deer abundance at Gettysburg National Military Park and Eisenhower National Historic Site
David P. Stainbrook, Duane R. Diefenbach
2012, Natural Resource Technical Report NPS/NER/NRTR—2012/626
The mission at Gettysburg National Military Park and Eisenhower National Historic Site (GNMP-ENHS) is to preserve the historic character of the parks to enable current and future generations to understand and interpret the events that took place at each park. Management objectives include maintaining the landscape as it existed during...
Significance of a 3D Elevation Program to wetland mapping
Gregory I. Snyder, Megan Lang
2012, National Wetlands Newsletter (34) 11-15
The recent National Enhanced Assessment conducted by the U.S. Geology Survey identified billions of dollars in potential annual benefits if a national-scale enhanced elevation data program was implemented. Given the importance of topography to wetlands, wetland mapping could benefit significantly from improved elevation data. ...
FOP 2012 stop, Honey Lake fault, Doyle, CA
Ryan Gold, Richard W. Briggs, Anthony Crone, Steve Angster
2012, Book chapter, Guidebook: neotectonics of the Lake Tahoe and Carson and Sierra Valleys, F.O.P. 2012 - Sept. 13-16: friends of the Pleistocene Pacific cell meeting
The Honey Lake fault system (HLFS) strikes north-northwestward across Long Valley near Doyle, CA and is part of a network of active, dextral strike-slip faults in the northern Walker Lane (Figure 1). Geologic investigations of a right-laterally offset terrace riser along the north bank of Long Valley Creek, which we...
Migration strategy affects avian influenza dynamics in mallards (Anas platyrhynchos).
John Y. Takekawa, Nichola J. Hill, Joshua T. Ackerman, Garth Herring, Keith Hobson, Carol J. Cardona, Jonathan Runstadler, Walter M. Boyce
2012, Molecular Ecology (21) 5986-5999
Studies of pathogen transmission typically overlook that wildlife hosts can include both migrant and resident populations when attempting to model circulation. Through the application of stable isotopes in flight feathers, we estimated the migration strategy of mallards (Anas platyrhynchos) occurring on California wintering grounds. Our study demonstrates that mallards- a...
Neoproterozoic tectonic evolution of the Jebel Saghro and Bou Azzer - El Graara inliers, eastern and central Anti-Atlas, Morocco
Gregory J. Walsh, John N. Aleinikoff, Richard W. Harrison, William C. Burton, James E. Quick, Foudad Benziane, Abdelaziz Yazidi, Abderrahim Saadane
2012, Precambrian Research (216-219) 23-62
New mapping, geochemistry, and 17 U–Pb SHRIMP zircon ages from rocks of the Sirwa, Bou Azzer–El Graara, and Jebel Saghro inliers constrain the Neoproterozoic evolution of the eastern Anti-Atlas during Pan-African orogenesis. In the Sirwa inlier, Tonian quartzite from the pre Pan-African passive margin deposits of the Mimount Formation contains...
Conditions and processes affecting radionuclide transport
Ardyth M. Simmons, Leonid A. Neymark
2012, GSA Memoirs (209) 277-362
Characteristics of host rocks, secondary minerals, and fluids would affect the transport of radionuclides from a previously proposed repository at Yucca Mountain, Nevada. Minerals in the Yucca Mountain tuffs that are important for retarding radionuclides include clinoptilolite and mordenite (zeolites), clay minerals, and iron and manganese oxides and hydroxides. Water...
Synthesis study of an erosion hot spot, Ocean Beach, California
Patrick L. Barnard, Jeff E. Hansen, Li H. Erikson
2012, Journal of Coastal Research (28) 903-922
A synthesis of multiple coastal morphodynamic research efforts is presented to identify the processes responsible for persistent erosion along a 1-km segment of 7-km-long Ocean Beach in San Francisco, California. The beach is situated adjacent to a major tidal inlet and in the shadow of the ebb-tidal delta at the...
The Glen Canyon Dam adaptive management program: Progress and immediate challenges
John F. Hamill, Theodore S. Melis
Philip J. Boon, Paul J. Raven, editor(s)
2012, Book chapter, River conservation and management
Adaptive management emerged as an important resource management strategy for major river systems in the United States (US) in the early 1990s. The Glen Canyon Dam Adaptive Management Program (‘the Program’) was formally established in 1997 to fulfill a statutory requirement in the 1992 Grand Canyon Protection Act (GCPA). The...
Fate and transport of glyphosate and aminomethylphosphonic acid in surface waters of agricultural basins
Richard H. Coupe, Stephen J. Kalkhoff, Paul D. Capel, Caroline Gregoire
2012, Pest Management Science (68) 16-30
BACKGROUND: Glyphosate [N-(phosphonomethyl)glycine] is a herbicide used widely throughout the world in the production of many crops and is heavily used on soybeans, corn and cotton. Glyphosate is used in almost all agricultural areas of the United States, and the agricultural use of glyphosate has increased from less than 10...
Geochemical constraints on adakites of different origins and copper mineralization
W.-D. Sun, M.-X. Ling, S.-L. Chung, X. Ding, X.-Y. Yang, H.-Y. Liang, W.-M. Fan, R. Goldfarb, Q.-Z. Yin
2012, Journal of Geology (120) 105-120
The petrogenesis of adakites holds important clues to the formation of the continental crust and copper ± gold porphyry mineralization. However, it remains highly debated as to whether adakites form by slab melting, by partial melting of the lower continental crust, or by fractional crystallization of normal arc magmas. Here,...
Land-cover change detection
Xuexia Chen, Chandra Giri, James Vogelmann
2012, Book chapter, Remote Sensing of Land Use and Land Cover
Land cover is the biophysical material on the surface of the earth. Land-cover types include grass, shrubs, trees, barren, water, and man-made features. Land cover changes continuously. The rate of change can be either dramatic and abrupt, such as the changes caused by logging, hurricanes and fire, or subtle and...
Life history of the fluted kidneyshell Ptychobranchus subtentum
V.M. Davis, J.B. Layzer
2012, American Midland Naturalist (167) 79-95
The fluted kidneyshell Ptychobranchus subtentum (Say, 1825) is a candidate for listing under the Endangered Species Act by the US Fish and Wildlife Service. Fecundity, fish hosts, and selected population demographics were determined during 2005–2006 for the fluted kidneyshell in the upper Clinch River, Hancock County, Tennessee. Females were fertilized in Aug....
Modelling reintroduced populations: The state of the art and future directions
Doug P. Armstrong, Michelle H. Reynolds
John G. Ewen, Doug P. Armstrong, Kevin Park, Phillip J. Seddon, editor(s)
2012, Book chapter, Reintroduction biology: Integrating science and management
No abstract available....
Loss and modification of habitat
Francis Lemckert, Stephen Hecnar, David S. Pilliod
John W. Wilkinson, Harold Heatwole, editor(s)
2012, Book chapter, Conservation and decline of amphibians: ecological aspects, effect of humans, and management
Amphibians live in a wide variety of habitats around the world, many of which have been modified or destroyed by human activities. Most species have unique life history characteristics adapted to specific climates, habitats (e.g., lentic, lotic, terrestrial, arboreal, fossorial, amphibious), and local conditions that provide suitable areas for reproduction,...
Wildlife forestry
Daniel J. Twedt
Okia Clement Akais, editor(s)
2012, Book chapter, Global Perspectives on Sustainable Forest Management
Using multitemporal remote sensing imagery and inundation measures to improve land change estimates in coastal wetlands
Y.C. Allen, B.R. Couvillion, J.A. Barras
2012, Estuaries and Coasts (35) 190-200
Remote sensing imagery can be an invaluable resource to quantify land change in coastal wetlands. Obtaining an accurate measure of land change can, however, be complicated by differences in fluvial and tidal inundation experienced when the imagery is captured. This study classified Landsat imagery from two wetland areas in coastal...
GONe: Software for estimating effective population size in species with generational overlap
J.A. Coombs, B.H. Letcher, K.H. Nislow
2012, Molecular Ecology Resources (12) 160-163
GONe is a user‐friendly, Windows‐based program for estimating effective size (Ne) in populations with overlapping generations. It uses the Jorde–Ryman modification to the temporal method to account for age structure in populations. This method requires estimates of age‐specific survival and birth rate and allele frequencies measured in...
Magnetostratigraphy of the Neogene Chaka basin and its implications for mountain building processes in the north-eastern Tibetan Plateau
H.-P. Zhang, W.H. Craddock, Richard O. Lease, W.-T. Wang, D.-Y. Yuan, P.-Z. Zhang, P. Molnar, D.-W. Zheng, W.-J. Zheng
2012, Basin Research (24) 31-50
Magnetostratigraphy of sedimentary rock deposited in the Chaka basin (north‐eastern Tibetan Plateau) indicates a late Miocene onset of basin formation and subsequent development of the adjacent Qinghai Nan Shan. Sedimentation in the basin initiated at ∼11 Ma. In the lower part of the basin fill, a coarsening‐upward sequence starting at ∼9 Ma,...
Nekton density patterns and hurricane recovery in submerged aquatic vegetation, and along non-vegetated natural and created edge habitats
Megan La Peyre, J. Gordon
2012, Estuarine, Coastal and Shelf Science (98) 108-118
We compared nekton habitat value of submerged aquatic vegetation, flooded non-vegetated natural and man-made edge habitats in mesohaline interior marsh areas in southwest Louisiana using a 1-m2 throw trap and 3-mm bag seine. When present, SAV habitats supported close to 4 times greater densities and higher species richness of nekton as compared to either natural or man-made...
Exploring similarities among many species distributions
Scott Simmerman, Jingyuan Wang, James Osborne, Kimberly Shook, Jian Huang, William Godsoe, Theodore R. Simons
2012, Conference Paper, Proceedings of the 1st Conference of the Extreme Science and Engineering Discovery Environment: Bridging from the eXtreme to the campus and beyond
Collecting species presence data and then building models to predict species distribution has been long practiced in the field of ecology for the purpose of improving our understanding of species relationships with each other and with the environment. Due to limitations of computing power as well as limited means of...
Intelligent estimation of spatially distributed soil physical properties
F. Iwashita, Michael J. Friedel, G.F. Ribeiro, Stephen J. Fraser
2012, Geoderma (170) 1-10
Spatial analysis of soil samples is often times not possible when measurements are limited in number or clustered. To obviate potential problems, we propose a new approach based on the self-organizing map (SOM) technique. This approach exploits underlying nonlinear relation of the steady-state geomorphic concave–convex nature of hillslopes (from hilltop...
