Mapping behavioral landscapes for animal movement: a finite mixture modeling approach
Jeff A. Tracey, Jun Zhu, Erin E. Boydston, Lisa M. Lyren, Robert N. Fisher, Kevin R. Crooks
2013, Ecological Applications (23) 654-669
Because of its role in many ecological processes, movement of animals in response to landscape features is an important subject in ecology and conservation biology. In this paper, we develop models of animal movement in relation to objects or fields in a landscape. We take a finite mixture modeling approach...
Investigating the potential impact of efflorescent mineral crusts on water quality: complementing analytical techniques with geochemical modelling
Bronwyn Camden-Smith, Raymond H. Johnson, Robert Richardson, David Billing, Hlanganani Tutu
Adrian Brown, Linda Figueroa, Christian Wolkersdorfer, editor(s)
2013, Conference Paper, Annual International Mine Water Association Conference: Reliable Mine Water Technology
Efflorescent crusts are a common feature forming on the surface of gold mining sites and tailings storage facilities during the dry season. Their dissolution at the start of the wet sea- son releases an acidic pulse of water rich in metal pollutants. The composition of the crusts is indicative of the water from...
Chemometric differentiation of crude oil families in the San Joaquin Basin, California
Kenneth E. Peters, Delphine Coutrot, Xavier Nouvelle, L. Scott Ramos, Brian G. Rohrback, Leslie B. Magoon, John E. Zumberge
2013, AAPG Bulletin (97) 103-143
Chemometric analyses of geochemical data for 165 crude oil samples from the San Joaquin Basin identify genetically distinct oil families and their inferred source rocks and provide insight into migration pathways, reservoir compartments, and filling histories. In the first part of the study, 17 source-related biomarker and stable carbon-isotope ratios...
Effects of Canada goose herbivory on the tidal freshwater wetlands in Anacostia Park, 2009-2011
Cairn C. Krafft, Jeffrey S. Hatfield, Richard S. Hammerschlag
2013, Report
Herbivory has played a major role in dictating vegetation abundance and species composition at Kingman Marsh in Anacostia Park, Washington, D.C., since restoration of this tidal freshwater wetland was initiated in 2000. The diverse and robust vegetative cover that developed in the first year post-reconstruction experienced significant decimation in...
Optimal temperature for malaria transmission is dramaticallylower than previously predicted
Eerin A. Mordecai, Krijin P. Paaijmans, Leah R. Johnson, Christian Balzer, Tal Ben-Horin, Emily de Moor, Amy McNally, Samraat Pawar, Sadie J. Ryan, Thomas C. Smith, Kevin D. Lafferty
2013, Ecology Letters (16) 22-30
The ecology of mosquito vectors and malaria parasites affect the incidence, seasonal transmission and geographical range of malaria. Most malaria models to date assume constant or linear responses of mosquito and parasite life-history traits to temperature, predicting optimal transmission at 31 °C. These models are at odds with field observations...
Geologic model for the assessment of undiscovered hydrocarbons in Lower to Upper Cretaceous carbonate rocks of the Fredericksburg and Washita groups, U.S. Gulf Coast Region
Sharon M. Swanson, Catherine B. Enomoto, Kristin O. Dennen, Brett J. Valentine, Celeste D. Lohr
2013, Gulf Coast Association of Geological Societies Transactions (63) 423-437
As part of the assessment of undiscovered oil and gas resources in Jurassic and Cretaceous strata of the U.S. Gulf Coast in 2010, the U.S. Geological Survey assessed carbonate rocks of the Fredericksburg and Washita groups and their equivalent units underlying onshore lands and State waters. One conventional assessment unit...
Maintaining and restoring sustainable ecosystems in southern Nevada
Jeanne C. Chambers, Burton K. Pendleton, Donald W. Sada, Steven M. Ostoja, Matthew L. Brooks
2013, General Technical Report RMRS-GTR-303-7
Managers in southern Nevada are challenge with determining appropriate goals and objectives and developing viable approaches for maintaining and restoring sustainable ecosystems in a time of rapid socio-ecological and environmental change. Sustainable or "healthy" ecosystems supply clean air, water and habitat for a diverse array of plants and animals. As...
Public release of the ISC-GEM Global Instrumental Earthquake Catalogue (1900-2009)
Dmitry A. Storchak, Domenico Di Giacomo, Istvan Bondara, E. Robert Engdahl, James Harris, William H.K. Lee, Antonio Villaseñor, Peter Bormann
2013, Seismological Research Letters (84) 810-815
The International Seismological Centre–Global Earthquake Model (ISC–GEM) Global Instrumental Earthquake Catalogue (1900–2009) is the result of a special effort to substantially extend and improve currently existing global catalogs to serve the requirements of specific user groups who assess and model seismic hazard and risk. The data from the ISC–GEM Catalogue...
Adaptive harvest management for the Svalbard population of pink-footed geese: cooperator report
Fred A. Johnson, Gitte H. Jensen, Jesper Madsen
2013, Report
This document describes progress to date on the development of a harvest‐management strategy for maintaining pink‐footed goose abundance near their target level by providing for sustainable harvests in Norway and Denmark. Many goose populations in western Europe have increased dramatically in recent decades. The Svalbard population of pink‐footed geese (Anser brachyrhynchus) is a good...
Modeling groundwater flow and quality
Leonard F. Konikow, Pierre D. Glynn
Olle Selinus, editor(s)
2013, Book chapter, Essentials of medical geology
In most areas, rocks in the subsurface are saturated with water at relatively shallow depths. The top of the saturated zone—the water table—typically occurs anywhere from just below land surface to hundreds of feet below the land surface. Groundwater generally fills all pore spaces below the water table and is...
Potential effects of climate change on inland glacial lakes and implications for lake-dependent biota in Wisconsin: final report April 2013
Michael W. Meyer, John F. Walker, Kevin P. Kenow, Paul W. Rasmussen, Paul J. Garrison, Paul C. Hanson, Randall J. Hunt
2013, Report
The economic vitality and quality of life of many northern Wisconsin communities is closely associated with the ecological condition of the abundant water resources in the region. Climate change models predict warmer temperatures, changes to precipitation patterns, and increased evapotranspiration in the Great Lakes region. Recently (1950-2006), many regions of...
Spatial extent and dynamics of dam impacts on tropical island freshwater fish assemblages
Patrick B. Cooney, Thomas J. Kwak
2013, BioScience (63) 176-190
Habitat connectivity is vital to the persistence of migratory fishes. Native tropical island stream fish assemblages composed of diadromous species require intact corridors between ocean and riverine habitats. High dams block fish migration, but low-head artificial barriers are more widespread and are rarely assessed for impacts. Among all 46 drainages...
2D IR spectra of cyanide in water investigated by molecular dynamics simulations
Myung Won Lee, Joshua K. Carr, Michael Gollner, Peter Hamm, Markus Meuwly
2013, Journal of Chemical Physics (139) 1-12
Using classical molecular dynamics simulations, the 2D infrared (IR) spectroscopy of CN− solvated in D2O is investigated. Depending on the force field parametrizations, most of which are based on multipolar interactions for the CN− molecule, the frequency-frequency correlation function and observables computed from it differ. Most notably, models based on...
Reactive transport modeling at uranium in situ recovery sites: uncertainties in uranium sorption on iron hydroxides
Raymond H. Johnson, Hlanganani Tutu
Adrian Brown, Linda Figueroa, Christian Wolkersdorfer, editor(s)
2013, Conference Paper, Annual International Mine Water Association Conference: Reliable Mine Water Technology
Geochemical changes that can occur down gradient from uranium in situ recovery (ISR) sites are important for various stakeholders to understand when evaluating potential effects on surrounding groundwater quality. If down gradient solid-phase material consists of sandstone with iron hydroxide coatings (no pyrite or organic carbon), sorption of uranium on...
NW CSC annual report fiscal year 2013
Gustavo A. Bisbal
2013, Report
The Northwest Climate Science Center (NW CSC) was established in 2010 as one of eight regional Climate Science Centers created by the Department of the Interior (DOI). The NW CSC encompasses Washing-ton, Oregon, Idaho, and western Montana and has overlapping boundaries with three Landscape Conservation Cooperatives (LCCs): the Great Northern,...
Influence of disturbance on temperate forest productivity
Emily B. Peters, Kirk R. Wythers, John B. Bradford, Peter B. Reich
2013, Ecosystems (16) 95-110
Climate, tree species traits, and soil fertility are key controls on forest productivity. However, in most forest ecosystems, natural and human disturbances, such as wind throw, fire, and harvest, can also exert important and lasting direct and indirect influence over productivity. We used an ecosystem model, PnET-CN, to examine how...
Estimating direct fatality impacts at wind farms: how far we’ve come, where we have yet to go
Manuela M. Huso
Susan Savitt Schwartz, editor(s)
2013, Conference Paper, PNWWRM IX. Proceedings of the Wind-Wildlife Research Meeting IX, Broomfield, CO, November 28-30, 2012
Measuring the potential impacts of wind farms on wildlife can be difficult and may require development of new statistical tools and models to accurately reflect the measurement process. This presentation reviews the recent history of approaches to estimating wildlife fatality under the unique conditions encountered at wind farms, their unifying...
In-stream attenuation of neuro-active pharmaceuticals and their metabolites
Jeffrey Writer, Ronald C. Antweiler, Imma Ferrar, Joseph N. Ryan, Michael Thurman
2013, Environmental Science & Technology (47) 9781-9790
In-stream attenuation was determined for 14 neuro-active pharmaceuticals and associated metabolites. Lagrangian sampling, which follows a parcel of water as it moves downstream, was used to link hydrological and chemical transformation processes. Wastewater loading of neuro-active compounds varied considerably over a span of several hours, and thus a sampling regime...
An overview of the Southern Nevada Agency Partnership science and research synthesis
Jeanne C. Chambers, Matthew L. Brooks, Kent Turner, Carol B. Raish, Steven M. Ostoja
2013, General Technical Report RMRS-GTR-303-1
Maintaining and restoring the diverse ecosystems and resources that occur in southern Nevada in the face of rapid socio-economic and ecological change presents numerous challenged to Federal land managers. Rapid population growth since the 1980s, the land uses associated with that growth, and the interactions of those uses with the...
Influences of Availability on Parameter Estimates from Site Occupancy Models with Application to Submersed Aquatic Vegetation
Brian R. Gray, Mark D. Holland, Feng Yi, Leigh Ann Harrod Starcevich
2013, Natural Resource Modeling (26) 526-545
Site occupancy models are commonly used by ecologists to estimate the probabilities of species site occupancy and of species detection. This study addresses the influence on site occupancy and detection estimates of variation in species availability among surveys within sites. Such variation in availability may result from temporary emigration, nonavailability...
234U/238U and δ87Sr in peat as tracers of paleosalinity in the Sacramento-San Joaquin Delta of California, USA
Judith Z. Drexler, James B. Paces, Charles N. Alpers, Lisamarie Windham-Myers, Leonid A. Neymark, Thomas D. Bullen, Howard E. Taylor
2013, Applied Geochemistry (40) 164-179
The purpose of this study was to determine the history of paleosalinity over the past 6000+ years in the Sacramento-San Joaquin Delta (the Delta), which is the innermost part of the San Francisco Estuary. We used a combination of Sr and U concentrations, d87Sr values, and 234U/238U activity ratios (AR)...
Descriptions and characterizations of water-level data and groundwater flow for the Brewster Boulevard and Castle Hayne Aquifer Systems and the Tarawa Terrace Aquifer
Robert E. Faye, L. Elliott Jones, René J. Suárez-Soto
2013, Report, Analyses and historical reconstruction of groundwater flow, contaminant fate and transport, and distribution of drinking water within the service areas of the Hadnot Point and Holcomb Boulevard Water Treatment Plants and Vicinities, U.S. Marine Corps Base Camp Lejeune, North Carolina
This supplement of Chapter A (Supplement 3) summarizes results of analyses of groundwater-level data and describes corresponding elements of groundwater flow such as vertical hydraulic gradients useful for groundwater-flow model calibration. Field data as well as theoretical concepts indicate that potentiometric surfaces within the study area are shown to resemble...
Using state-and-transition modeling to account for imperfect detection in invasive species management
Leonardo Frid, Tracy Holcombe, Jeffrey T. Morisette, Aaryn D. Olsson, Lindy Brigham, Travis M. Bean, Julio L. Betancourt, Katherine Bryan
2013, Invasive Plant Science and Management (6) 36-47
Buffelgrass, a highly competitive and flammable African bunchgrass, is spreading rapidly across both urban and natural areas in the Sonoran Desert of southern and central Arizona. Damages include increased fire risk, losses in biodiversity, and diminished revenues and quality of life. Feasibility of sustained and successful mitigation will depend heavily...
The interplay of evolved seawater and magmatic-hydrothermal fluids in the 3.24 Ga panorama volcanic-hosted massive sulfide hydrothermal system, North Pilbara Craton, Western Australia
Susan L. Drieberg, Steffen G. Hagemann, David L. Huston, Gary Landis, Chris G. Ryan, Esme Van Achterbergh, Torsten Vennemann
2013, Economic Geology (108) 79-110
The ~3240 Ma Panorama volcanic-hosted massive sulfide (VHMS) district is unusual for its high degree of exposure and low degree of postdepositional modification. In addition to typical seafloor VHMS deposits, this district contains greisen- and vein-hosted Mo-Cu-Zn-Sn mineral occurrences that are contemporaneous with VHMS orebodies and are hosted by the...
Tectonic evolution and Cretaceous gold metallogenesis of southwestern Alaska
Garth E. Graham, Richard J. Goldfarb, Marti L. Miller, Kati Gibler, Mike Roberts
2013, Society of Economic Geologists Special Publication (17) 169-200
Cretaceous gold metallogenesis in southwestern Alaska comprises three distinct episodes related to the accretionary evolution of northwestern North America. The oldest mineralizing event is characterized by 112 Ma Cu-Au-Bi-Te porphyry-type(?) veining in the zoned Bonanza and adjacent plutons that intruded rocks of the Nyac terrane. Tectonic reconstructions and limited geological...
