Net ecosystem production and organic carbon balance of U.S. East Coast estuaries: A synthesis approach
Maria Herrmann, Raymond G. Najjar, W. Michael Kemp, Richard B. Alexander, Elizabeth W. Boyer, Wei-Jun Cai, Peter C. Griffith, Kevin D. Kroeger, S. Leigh McCallister, Richard A. Smith
2015, Global Biogeochemical Cycles (29) 96-111
Net ecosystem production (NEP) and the overall organic carbon budget for the estuaries along the East Coast of the United States are estimated. We focus on the open estuarine waters, excluding the fringing wetlands. We developed empirical models relating NEP to loading ratios of dissolved inorganic nitrogen to total organic...
Early Permian conodont fauna and stratigraphy of the Garden Valley Formation, Eureka County, Nevada
Bruce R. Wardlaw, Dora M. Gallegos, Valery V. Chernykh, Walter S. Snyder
2015, Micropaleontology (61) 369-387
The lower part of the Garden Valley Formation yields two distinct conodont faunas. One of late Asselian age dominated by Mesogondolella and Streptognathodus and one of Artinskian age dominated by Sweetognathus with Mesogondolella. The Asselian fauna contains the same species as those found in the type area of the Asselian...
Provenance and detrital zircon geochronologic evolution of lower Brookian foreland basin deposits of the western Brooks Range, Alaska, and implications for early Brookian tectonism
Thomas E. Moore, Paul B. O’Sullivan, Christopher J. Potter, Raymond A. Donelick
2015, Geosphere (11) 93-122
The Upper Jurassic and Lower Cretaceous part of the Brookian sequence of northern Alaska consists of syntectonic deposits shed from the north-directed, early Brookian orogenic belt. We employ sandstone petrography, detrital zircon U-Pb age analysis, and zircon fission-track double-dating methods to investigate these deposits in a succession of thin...
Analyzing high resolution topography for advancing the understanding of mass and energy transfer through landscapes: A review
Paola Passaiacquaa, Patrick Belmont, Dennis M. Staley, Jeffery Simley, J. Ramon Arrowsmith, Collin A. Bode, Christopher Crosby, Stephen DeLong, Nancy Glenn, Sara Kelly, Dimitri Lague, Harish Sangireddy, Keelin Schaffrath, David Tarboton, Thad Wasklewicz, Joseph Wheaton
2015, Earth-Science Reviews (148) 174-193
The study of mass and energy transfer across landscapes has recently evolved to comprehensive considerations acknowledging the role of biota and humans as geomorphic agents, as well as the importance of small-scale landscape features. A contributing and supporting factor to this evolution is the emergence over the last two...
River corridor science: Hydrologic exchange and ecological consequences from bedforms to basins
Judson Harvey, Michael Gooseff
2015, Water Resources Research (51) 6893-6922
Previously regarded as the passive drains of watersheds, over the past 50 years, rivers have progressively been recognized as being actively connected with off-channel environments. These connections prolong physical storage and enhance reactive processing to alter water chemistry and downstream transport of materials and energy. Here we propose river corridor...
Denitrification in the Mississippi River network controlled by flow through river bedforms
Jesus D. Gomez-Velez, Judson W. Harvey, M. Bayani Cardenas, Brian Kiel
2015, Nature Geoscience (8) 941-945
Increasing nitrogen concentrations in the world’s major rivers have led to over-fertilization of sensitive downstream waters. Flow through channel bed and bank sediments acts to remove riverine nitrogen through microbe-mediated denitrification reactions. However, little is understood about where in the channel network this biophysical process is most efficient, why certain...
Management applications of discontinuity theory
David G. Angeler, Craig R. Allen, Chris Barichievy, Tarsha Eason, Ahjond S. Garmestani, Nicholas A.J. Graham, Dean Granholm, Lance H. Gunderson, Melinda Knutson, Kirsty L. Nash, R. John Nelson, Magnus Nystrom, Trisha Spanbauer, Craig A. Stow, Shana M. Sundstrom
2015, Journal of Applied Ecology (53) 688-698
Human impacts on the environment are multifaceted and can occur across distinct spatiotemporal scales. Ecological responses to environmental change are therefore difficult to predict, and entail large degrees of uncertainty. Such uncertainty requires robust tools for management to sustain ecosystem goods and services and maintain resilient ecosystems.We...
Golden Eagle predation of an adult turkey vulture
Clint W. Boal
2015, Bulletin of the Texas Ornithological Society (48) 53-55
The Golden Eagle (Aquila chrysaetos) is a large, apex predator that occurs at low densities, has a long life span, experiences delayed maturity, has low reproductive rates, and has no natural predators (Watson 1997, Kochert et al. 2002). Golden Eagles are sensitive to anthropogenic driven landscape changes in land cover...
Database creation, data quality assessment, and geochemical maps (phase V, deliverable 59)—Final report on compilation and validation of geochemical data
Robert G. Eppinger, Stuart A. Giles, Gregory K. Lee, Steven M. Smith
2015, Open-File Report 2013-1280-D
Under the World Bank-funded Second Projet de Renforcement Institutionnel du Secteur Minier de la Republique Islamique de Mauritanie (PRISM-II), this Phase V geochemistry report follows earlier Phase I and Phase II summary reports on geochemical data (U.S. Geological Survey, 2007 and Eppinger, 2007; respectively). All the reports are based on...
A Candidate Vegetation Index of Biological Integrity Based on Species Dominance and Habitat Fidelity
Brian D Gara, Martin A. Stapanian
2015, Ecological Indicators (50) 225-232
Indices of biological integrity of wetlands based on vascular plants (VIBIs) have been developed in many areas of the USA and are used in some states to make critical management decisions. An underlying concept of all VIBIs is that they respond negatively to disturbance. The Ohio VIBI (OVIBI) is calculated...
North Cascades National Park Service Complex
Robert Hoffman, Andrea Woodward, Patricia K. Haggerty, Kurt J. Jenkins, Paul C. Griffin, M. J. Adams, Joan Hagar, Tonnie Cummings, Dan Duriscoe, Karen Kopper, Jon Riedel, Lelaina Marin, Guillaume S. Mauger, Karen Bumbaco, Jeremy S. Littell
2015, Report
Natural Resource Condition Assessments (NRCAs) evaluate current conditions for a subset of natural resources and resource indicators in national parks. NRCAs also report on trends in resource condition (when possible), identify critical data gaps, and characterize a general level of confidence for study findings. The resources and indicators emphasized in...
Crystalline basement map of Mauritania derived from filtered aeromagnetic data (deliverable 54_1), Aeromagnetic and geological structure map of Mauritania (phase V, deliverable 54_2), Maximum depth to basement map of Mauritania derived from Euler analysis of Aeromagnetic data (phase V, deliverable 54_3), and color composite image of radioelement data (added value)
Carol A. Finn, John D. Horton
2015, Open-File Report 2013-1280-B1
In 1996, at the request of the Government of the Islamic Republic of Mauritania, a team of U.S. Geological Survey (USGS) scientists produced a strategic plan for the acquisition, improvement and modernization of multidisciplinary sets of data to support the growth of the Mauritanian minerals sector and to highlight the...
Global Cropland Area Database (GCAD) derived from Remote Sensing in Support of Food Security in the Twenty-first Century: Current Achievements and Future Possibilities
Pardhasaradhi G. Teluguntla, Prasad S. Thenkabail, Jun Xiong, Murali Krishna Gumma, Chandra Giri, Cristina Milesi, Mutlu Ozdogan, Russ Congalton, James Tilton, Temuulen Tsagaan Sankey, Richard Massey, Aparna Phalke, Kamini Yadav
2015, Book chapter, Land resources: monitoring, modelling, and mapping
The precise estimation of the global agricultural cropland- extents, areas, geographic locations, crop types, cropping intensities, and their watering methods (irrigated or rainfed; type of irrigation) provides a critical scientific basis for the development of water and food security policies (Thenkabail et al., 2012, 2011, 2010). By year 2100, the...
Predicted changes in climatic niche and climate refugia of conservation priority salamander species in the northeastern United States
William B. Sutton, Kyle Barrett, Allison T. Moody, Cynthia S. Loftin, Phillip G. deMaynadier, Priya Nanjappa
2015, Forests (6) 1-26
Global climate change represents one of the most extensive and pervasive threats to wildlife populations. Amphibians, specifically salamanders, are particularly susceptible to the effects of changing climates due to their restrictive physiological requirements and low vagility; however, little is known about which landscapes and species are vulnerable to climate change....
Stratigraphic and microfossil evidence for a 4500-year history of Cascadia subduction zone earthquakes and tsunamis at Yaquina River estuary, Oregon, USA
Nicholas A Graehl, Harvey M. Kelsey, Robert C. Witter, Eileen Hemphill-Haley, Simon E. Engelhart
2015, GSA Bulletin (127) 211-226
The Sallys Bend swamp and marsh area on the central Oregon coast onshore of the Cascadia subduction zone contains a sequence of buried coastal wetland soils that extends back ∼4500 yr B.P. The upper 10 of the 12 soils are represented in multiple cores. Each soil is abruptly overlain...
Tornadic storm avoidance behavior in breeding songbirds
Henry M. Streby, Gunnar R. Kramer, Sean M. Peterson, Justin A. Lehman, David A. Buehler, David E. Andersen
2015, Current Biology (25) 98-102
Migration is a common behavior used by animals of many taxa to occupy different habitats during different periods. Migrant birds are categorized as either facultative (i.e., those that are forced to migrate by some proximal cue, often weather) or obligate (i.e., those that migrate on a regular cycle). During migration,...
Status assessment of the Endangered snow leopard Panthera uncia and other large mammals in the Kyrgyz Alay, using community knowledge corrected for imperfect detection
Julia Taubmann, Koustubh Sharma, Kubanychbek Zhumabai Uulu, James E. Hines, Charudutt Mishra
2015, Oryx (50) 220-230
The Endangered snow leopard Panthera uncia occurs in the Central Asian Mountains, which cover c. 2 million km2. Little is known about its status in the Kyrgyz Alay Mountains, a relatively narrow stretch of habitat connecting the southern and northern...
Automated integration of lidar into the LANDFIRE product suite
Birgit Peterson, Kurtis Nelson, Carl Seielstad, Jason M. Stoker, W. Matt Jolly, Russell Parsons
2015, Remote Sensing Letters (6) 247-256
Accurate information about three-dimensional canopy structure and wildland fuel across the landscape is necessary for fire behaviour modelling system predictions. Remotely sensed data are invaluable for assessing these canopy characteristics over large areas; lidar data, in particular, are uniquely suited for quantifying three-dimensional canopy structure. Although lidar data are increasingly...
Using chromate to investigate the impact of natural organics on the surface reactivity of nanoparticulate magnetite
Andrew L. Swindle, Isabelle M. Cozzarelli, Andrew S. Elwood Madden
2015, Environmental Science & Technology (49) 2156-2162
Chromate was used as a chemical probe to investigate the size-dependent influence of organics on nanoparticle surface reactivity. Magnetite–chromate sorption experiments were conducted with ∼90 and ∼6 nm magnetite nanoparticles in the presence and absence of fulvic acid (FA), natural organic matter (NOM), and isolated landfill leachate (LL). Results indicated...
Beyond temperature: Clumped isotope signatures in dissolved inorganic carbon species and the influence of solution chemistry on carbonate mineral composition
Aradhna K. Tripati, Pamela S. Hill, Robert A. Eagle, Jed L. Mosenfelder, Jianwu Tang, Edwin A. Schauble, John M. Eiler, Richard E. Zeebe, Joji Uchikawa, Tyler B. Coplen, Justin B. Ries, Drew Henry
2015, Geochimica et Cosmochimica Acta (166) 344-371
“Clumped-isotope” thermometry is an emerging tool to probe the temperature history of surface and subsurface environments based on measurements of the proportion of 13C and 18O isotopes bound to each other within carbonate minerals in 13C18O16O22- groups (heavy isotope “clumps”). Although most clumped isotope geothermometry implicitly presumes carbonate crystals have attained...
Projecting the spatiotemporal carbon dynamics of the Greater Yellowstone Ecosystem from 2006 to 2050
Shengli Huang, Shuguang Liu, Jinxun Liu, Devendra Dahal, Claudia Young, Brian Davis, Terry L. Sohl, Todd Hawbaker, Benjamin M. Sleeter, Zhiliang Zhu
2015, Carbon Balance and Management (10)
BackgroundClimate change and the concurrent change in wildfire events and land use comprehensively affect carbon dynamics in both spatial and temporal dimensions. The purpose of this study was to project the spatial and temporal aspects of carbon storage in the Greater Yellowstone Ecosystem (GYE) under...
Angler satisfaction in South Dakota
Kjetil R. Henderson, Larry M. Gigliotti
2015, Proceedings of the South Dakota Academy of Science (94) 171-186
Many industries use satisfaction measures to evaluate performance. The South Dakota Department of Game, Fish and Parks identified satisfaction as one of their performance measures for evaluating fishing in South Dakota. In fisheries management, the perspectives’ of license buyers are valuable to determine if management activities are providing the benefits...
High‐resolution trench photomosaics from image‐based modeling: Workflow and error analysis
Nadine G. Reitman, Scott E.K. Bennett, Ryan D. Gold, Richard W. Briggs, Christopher B. DuRoss
2015, Bulletin of the Seismological Society of America (105) 2354-2366
Photomosaics are commonly used to construct maps of paleoseismic trench exposures, but the conventional process of manually using image‐editing software is time consuming and produces undesirable artifacts and distortions. Herein, we document and evaluate the application of image‐based modeling (IBM) for creating photomosaics and 3D models of paleoseismic trench exposures,...
Day-roost tree selection by northern long-eared bats—What do non-roost tree comparisons and one year of data really tell us?
Alexander Silvis, W. Mark Ford, Eric R. Britzke
2015, Global Ecology and Conservation (3) 756-763
Bat day-roost selection often is described through comparisons of day-roosts with randomly selected, and assumed unused, trees. Relatively few studies, however, look at patterns of multi-year selection or compare day-roosts used across years. We explored day-roost selection using 2 years of roost selection data for female northern long-eared bats (Myotis...
Validation of geometric accuracy of Global Land Survey (GLS) 2000 data
Rajagopalan Rengarajan, Aparajithan Sampath, James C. Storey, Mike Choate
2015, Photogrammetric Engineering and Remote Sensing (2) 131-141
The Global Land Survey (GLS) 2000 data were generated from Geocover™ 2000 data with the aim of producing a global data set of accuracy better than 25 m Root Mean Square Error (RMSE). An assessment and validation of accuracy of GLS 2000 data set, and its co-registration with Geocover™ 2000...
