Spatially explicit modelling of floodplain forest succession: Interactions among flood inundation, forest successional processes, and other disturbances in the Upper Mississippi River floodplain, USA
Nathan R. De Jager, Molly Van Appledorn, Timothy J. Fox, Jason J. Rohweder, Lyle J. Guyon, Andrew R. Meier, Robert J. Cosgriff, Benjamin J. Vandermyde
2019, Ecological Modelling (405) 15-32
Simulation models are often used to identify hydrologic regimes suitable for different riparian or floodplain tree species. However, most existing models pay little attention to forest successional processes or other disturbances that may interact with the hydrologic regime of river systems to...
Knowing your limits: Estimating range boundaries and co-occurrence zones for two competing plethodontid salamanders
S. M. Amburgey, D. A. W. Miller, Adrianne B. Brand, Andrea M. Dietrich, Evan H. Campbell Grant
2019, Ecosphere (10) 1-19
Understanding threats to species persistence requires knowledge of where species currently occur. We explore methods for estimating two important facets of species distributions, namely where the range limit occurs and how species interactions structure distributions. Accurate understanding of range limits is crucial for predicting range dynamics...
Assessing water quality from highway runoff at selected sites in North Carolina with the Stochastic Empirical Loading and Dilution Model (SELDM)
J. Curtis Weaver, Gregory E. Granato, Sharon A. Fitzgerald
2019, Scientific Investigations Report 2019-5031
In 2015, the U.S. Geological Survey (USGS) entered into a cooperative agreement with the North Carolina Department of Transportation (NCDOT) to develop a North Carolina-enhanced variation of the national Stochastic Empirical Loading and Dilution Model (SELDM) with available North Carolina-specific streamflow and water-quality data and to demonstrate use of the...
Intra‐Annual Changes in Waterborne Nanophyetus salmincola
Paul Hershberger, Rachel Powers, Bonnie L Besijn, J. Rankin, Mark A. Wilson, B Antipa, J Bjelland, Ashley Mackenzie, Jacob Gregg, Maureen Purcell
2019, Journal of Aquatic Animal Health (31) 259-265
An analysis of daily water samples collected from an index site on Big Soos Creek, Washington indicated intra‐annual differences in the concentrations of waterborne Nanophyetus salmincola. Waterborne concentrations, quantified as gene copies/L, peaked during the fall (October–November 2016), decreased to very low concentrations over the winter (January–March 2017), and then...
Inversion of airborne EM data with an explicit choice of prior model
Thomas Mejer Hansen, Burke J. Minsley
2019, Geophysical Journal International (218) 1348-1366
Inversion of airborne electromagnetic (AEM) data is an under-determined inverse problem, in that infinitely many resistivity models exist that will be able to explain the observed data, within measurement errors. Therefore, additional information or constraints must be taken into account to solve the inverse problem. In deterministic approaches, the goal...
Salinity yield modeling of the Upper Colorado River Basin using 30-meter resolution soil maps and random forests
Travis Nauman, Christopher P. Ely, Matthew Miller, Michael C. Duniway
2019, Water Resources Research (55) 4954-4973
Salinity loading in the Upper Colorado River Basin (UCRB) costs local economies upwards of $300 million US dollars annually. Salinity source models have generally included coarse spatial data to represent non‐agriculture sources. We developed new predictive soil property and cover maps at 30 m resolution to improve source representation in...
Context matters: Using reinforcement learning to develop human-readable, state-dependent outbreak response policies
William J. M. Probert, Sandya Lakkur, Christopher J Fonnesbeck, Katriona Shea, Michael C. Runge, Michael J. Tildesley, Matthew J. Ferrari
2019, Philosophical Transactions of the Royal Society B: Biological Sciences (374) 1-9
The number of all possible epidemics of a given infectious disease that could occur on a given landscape is large for systems of real-world complexity. Furthermore, there is no guarantee that the control actions that are optimal, on average, over all possible epidemics are also best for each possible epidemic....
Development of microsatellite loci for two New World vultures (Cathartidae)
Darren J Wostenberg, Jennifer A. Fike, Sara J. Oyler-McCance, Michael L. Avery, Antoinette J. Piaggio
2019, BMC Research Notes (12)
ObjectiveUse next-generation sequencing to develop microsatellite loci that will provide the variability necessary for studies of genetic diversity and population connectivity of two New World vulture species.ResultsWe characterized 11 microsatellite loci for black vultures (Coragyps atratus) and 14 loci for turkey vultures (Cathartes aura). These microsatellite...
The Orange Tuff: A Late Pleistocene tephra-fall deposit emplaced by a VEI 5 silicic Plinian eruption in West Java, Indonesia
Christopher Harpel, Kushendratno, James Stimac, Cecilia F. Avendano Rodriguez de Harpel, Sofyan Primulyana
2019, Bulletin of Volcanology (81)
A VEI 5 dacite eruption emplaced the Orange Tuff about between 34.3 cal kBP and 17.2 cal kBP. Gunung Salak is the unit’s source and the Orange Tuff represents the most recent such eruption from any of the volcanoes southwest of Bogor, Indonesia. The Orange Tuff is the region’s first...
Effects of climate change on habitat and connectivity for populations of a vulnerable, endemic salamander in Iran
Mohammad Reza Ashrafzadeh, Ali Asghar Naghipour, Maryam Haidarian, Szilvia Kusza, David S. Pilliod
2019, Global Ecology and Conservation (19)
Habitat loss and fragmentation are among the biggest threats to amphibian populations and anthropogenic climate change may exacerbate these. The response of Iran's amphibians to climate change is uncertain and yet making an accurate prediction of how the species will respond is critical for conservation. We assessed how expected future...
Effect of corolla slitting and nectar robbery by the Eastern Carpenter Bee (Hymenoptera: Apidae) on fruit quality of Vaccinium corymbosum, L.; (Ericales: Ericaceae).
Sara K Tucker, Howard S. Ginsberg, Steven R. Alm
2019, Environmental Entomology (48) 718-726
Eastern carpenter bees, Xylocopa virginica (L.) (Hymenoptera: Apidae), are among the most abundant native bee visitors to highbush blueberry, Vaccinium corymbosum L., flowers in the northeastern United States, and they sometimes display corolla-slitting behavior to rob nectar. We studied foraging behavior of X. virginica on 14 blueberry cultivars in an experimental planting in Rhode Island, and...
Using an individual-based model to assess common biases in lek-based count data to estimate population trajectories of lesser prairie-chickens
Beth Ross, Daniel S. Sullins, David A. Haukos
2019, PLoS ONE
Researchers and managers are often interested in monitoring the underlying state of a population (e.g., abundance), yet error in the observation process might mask underlying changes due to imperfect detection, availability for sampling, and heterogeneity in abundance. Additional heterogeneity can be introduced into a monitoring program when male-based surveys are...
Volcano deformation: Insights into magmatic systems
Daniel Dzurisin
2019, Book chapter, Encyclopedia of Complexity and Systems Science
Volcano geodesy is the branch of geodetic science that deals with the changing shapes of volcanoes, whether large or small, deep-seated or surficial. Together with seismicity and volcanic gas flux, deformation of the ground surface can be a key indicator of subsurface conditions and processes at volcanoes—information that not only...
Application of electron microscopy TEM and SEM for analysis of coals, organic-rich shales and carbonaceous matter
B. Kwiecinska, Brett J. Valentine, S. Pusz
2019, International Journal of Coal Geology (211)
This paper provides a brief summary of the history, development and variety of applications of electron microscopy techniques to analyze coals, organic-rich shales, and carbonaceous materials. General construction and principles of operation of transmitted (TEM) and scanning electron microscope (SEM) are outlined, along with guidance on specimen preparation, and a brief overview of...
Movements of juvenile Pacific Lamprey (Entosphenus tridentatus) in the Yakima and Columbia Rivers, Washington, 2018—A pilot study using acoustic telemetry
Theresa L. Liedtke, Ralph T. Lampman, Z. Daniel Deng, Tyler E. Beals, Michael S. Porter, Amy C. Hansen, Tobias J. Kock, Ryan G. Tomka, Patrick Monk
2019, Open-File Report 2019-1058
Telemetry has been an invaluable tool to improve our understanding of adult Pacific Lamprey (Entosphenus tridentatus) movements and to guide management approaches to protect and restore this species of concern. Juvenile and larval lamprey, however, are much smaller than adults, and have not been monitored with telemetry because available transmitters...
Assessment of Paleozoic Shale-Oil and Shale-Gas Resources in the Tarim Basin of China, 2018
Christopher J. Potter, Christopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Heidi M. Leathers-Miller, Kristen R. Marra, Phuong A. Le, Ronald M. Drake II, Michael E. Brownfield, Janet K. Pitman
2019, Fact Sheet 2019-3011
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 1.4 billion barrels of shale oil and 26.9 trillion cubic feet of shale gas in Paleozoic formations in the Tarim Basin of China....
The 3D Elevation Program—Supporting California's Economy
Carol L. Ostergren, Drew Decker, Carswell Jr.
2019, Fact Sheet 2019-3029
IntroductionCalifornia faces unprecedented challenges presented by shifting weather patterns that are defining a “new normal.” The result has been extreme weather events, prolonged drought, flooding, and debris flows. These conditions drive severe tree mortality, increase wildfire occurrence and intensity, reduce water availability, and hasten subsidence in groundwater basins. Collectively, these...
Assessment of Undiscovered Oil and Gas Resources of the Reggane Basin Province, Algeria, 2018
Christopher J. Schenk, Michael E. Brownfield, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Marilyn E. Tennyson, Thomas M. Finn, Kristen R. Marra, Stephanie B. Gaswirth, Heidi M. Leathers-Miller, Janet K. Pitman, Ronald M. Drake II
2019, Fact Sheet 2019-3016
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 1.3 billion barrels of oil and 63 trillion cubic feet of gas in the Reggane Basin Province of Algeria....
Encylopedia of Caves
Katherine J. Knierim, Phillip D. Hays
2019, Book chapter, Encyclopedia of Caves
For many people, a visit to a cave is a wondrous event directing our minds to ponder the mysteries presented by these unique places and inspiring questions: How old is the cave? What was the role of water in forming the cave and where did the water come from? How is the...
Revisions to suspended-sediment concentration, percent smaller than 0.063 millimeter, and instantaneous suspended-sediment discharge reported for a cooperative program between the U.S. Geological Survey and the U.S. Army Corps of Engineers in the lower Mississippi-Atchafalaya River Basin, October 1989 to February 2015
Katherine K. Norton, Lisa D. Olsen, Todd E. Baumann, Lane B. Simmons, Athena P. Clark, Dennis K. Demcheck, Marlon Johnson
2019, Scientific Investigations Report 2018-5147
This report presents revised results for four parameters reported for suspended-sediment samples that were collected in the lower Mississippi-Atchafalaya River Basin as part of a cooperative program between the U.S. Army Corps of Engineers, Mississippi Valley Division, New Orleans District and the U.S. Geological Survey (USGS). The cooperative program has...
Assessment of coal mine methane (CMM) and abandoned mine methane (AMM) resource potential of longwall mine panels: example from Northern Appalachian Basin, USA
C. Ozgen Karacan, Peter D. Warwick
2019, International Journal of Coal Geology (208) 37-53
"Coal mine methane (CMM) and abandoned mine methane (AMM), are by-products of underground coal mining. The quantity and the emission rate of CMM and AMM may vary depending on the type of mine, gas content of the mined coal seam, and gas sourced from strata and coal beds in overlying...
Geochemical factors controlling dissolved elemental mercury and methylmercury formation in Alaskan wetlands of varying trophic status
Brett Poulin, Joseph N. Ryan, Michael Tate, David Krabbenhoft, Mark E Hines, Tamar Barkay, Jeffra Schaefer, George R. Aiken
2019, Environmental Science & Technology (53) 6203-6213
Transformations of aqueous inorganic divalent mercury (Hg(II)i) to volatile dissolved gaseous mercury (Hg(0)(aq)) and toxic methylmercury (MeHg) governs mercury bioavailability and fate in northern ecosystems. This study quantified concentrations of aqueous mercury species (Hg(II)i, Hg(0)(aq), MeHg) and relevant geochemical constituents in pore waters of eight Alaskan wetlands that differ in...
Insights from Rock-Eval analysis on the influence of sample weight on hydrocarbon generation from Lower Permian organic-matter rich rocks, West Bokaro basin, India
B Hazra, C. Ozgen Karacan, Mani T Devleena, Pradeep K. Singh, Ashok K. Singh
2019, Marine and Petroleum Geology (106) 160-170
Among the different Rock-Eval parameters, the hydrocarbons released under S2 peak of Rock-Eval is of significance as it indicates the residual hydrocarbon content of the rock. Further, through its relationship with TOC content, it helps in calculating hydrogen indices (HI) which helps in understanding the type of organic-matter present in...
Relationships between regional coastal land cover distributions and elevation reveal data uncertainty in a sea-level rise impacts model
Erika E. Lentz, Nathaniel G. Plant, E. Robert Thieler
2019, Earth Surface Dynamics (7) 429-438
Understanding land loss or resilience in response to sea-level rise (SLR) requires spatially extensive and continuous datasets to capture landscape variability. We investigate sensitivity and skill of a model that predicts dynamic response likelihood to SLR across the northeastern U.S. by exploring several data inputs and outcomes....
A unified catalog of earthquake hypocenters and magnitudes at volcanoes in Alaska—1989 to 2018
John Power, Paul A. Friberg, Matthew M. Haney, Thomas Parker, Scott D. Stihler, James P. Dixon
2019, Scientific Investigations Report 2019-5037
The Alaska Volcano Observatory (AVO) has maintained an earthquake catalog since 1989 that now contains over 120,000 hypocenters and magnitudes that occurred near Alaskan volcanoes. Since 1989 the seismic instrumentation and data acquisition and processing techniques have undergone numerous changes as computer systems and seismic processing software have advanced and...
