Sea-cliff bedstraw (Galium buxifolium) patterns and trends, 2005–14, on Santa Cruz and San Miguel Islands, Channel Islands National Park, California
Kathryn McEachern, Katherine A. Chess, Karen Flagg, Kenneth G. Niessen
2019, Open-File Report 2019-1054
Sea-cliff bedstraw (Galium buxifolium [Rubiaceae]) is a delicate dioecious subshrub endemic to Santa Cruz and San Miguel Islands, in the northern California Channel Islands. It was listed as endangered in 1997 under the Federal Endangered Species Act, threatened by soil loss, habitat alteration, and herbivory from more than a century...
Petrographic, geochemical, and geochronologic data for cenozoic volcanic rocks of the Tonopah, Divide, and Goldfield Mining Districts, Nevada
Edward A. du Bray, David A. John, Peter G. Vikre, Joseph P. Colgan, Michael A. Cosca, Leah E. Morgan, Robert J. Fleck, Wayne R. Premo, Christopher S. Holm-Denoma
2019, Data Series 1099
The purpose of this report is to summarize geochemical, petrographic, and geochronologic data for samples, principally those of unmineralized Tertiary volcanic rocks, from the Tonopah, Divide, and Goldfield mining districts of west-central Nevada (fig. 1). Much of the data presented here for the Tonopah and Divide districts are for samples...
Non-native plants have greater impacts because of differing per-capita effects and non-linear abundance-impact curves
Ian S. Pearse, Helen Sofaer, David N. Zaya, Greg Spyreas
2019, Ecology Letters (22) 1214-1220
Invasive, non-native species can have tremendous impacts on biotic communities, where they reduce the abundance and diversity of local species. However, it remains unclear whether impacts of non-native species arise from their high abundance or whether each non-native individual has a disproportionate impact – i.e., a higher per-capita effect –...
Looking for love under the ice: Using passive acoustics to detect burbot (Lota lota: Gadidae) spawning activity
Timothy B. Grabowski, Shawn P. Young, Peter A. Cott
2019, Freshwater Biology (65) 37-44
Burbot (Lota lota: Gadidae) is a difficult species to manage effectively due to its preference for deep‐water habitats and under‐ice spawning behaviour, resulting in a poor understanding of its reproductive activity. However, the use of acoustic signalling by burbot as part of their mating system has recently been described...
Radiometric ages of volcanic rocks on the fort rock dome and in the aquarius mountains, Yavapai and Mohave Counties, Arizona
Gary S. Fuis, Andrew T. Calvert, Katie Sullivan
2019, Open-File Report 2019-1038
The Fort Rock dome, in Yavapai County, Ariz., is a roughly circular geologic structure in plan view, 2.5 km in diameter, that is similar in many ways to an impact crater; however, it is a structural dome caused by a potassic mafic intrusion at depth, and the crater-like depression in...
Hydrogeology of an alpine talus aquifer: Cordillera Blanca, Peru
Robin Glas, Laura K. Lautz, Jeffrey M. McKenzie, Robert Moucha, Daniel Chavez, Bryan Mark, John W. Lane Jr.
2019, Hydrogeology Journal (21) 2137-2154
The dramatic loss of glacial mass in low latitudes is causing shifts in downstream water availability and use during the driest months of the year. The world’s largest concentration of tropical glaciers lies in the Cordillera Blanca range of Peru, where glacial runoff is declining and...
Monitoring volcanic deformation
Maurizio Battaglia, Jorge Alpala, Rosa Alpala, Mario Angarita, Dario Arcos, Leonardo Eullides, Pablo Euillades, Cyrill Mueller, Lourdes Narvaez
2019, Book chapter, Reference Module in Earth Systems and Environmental Sciences
Whereas research in volcano geodesy seeks to push the boundaries of our knowledge of the physics of volcanoes, monitoring looks at changes in volcano behavior to predict when a volcanic crisis might develop. To be effective, geodetic monitoring must be done before, during, and after eruptions and must be...
From the oceans to the cloud: Opportunities and challenges for data, models, computation and workflows
Tiffany Vance, Micah Wengren, Eugene F. Burger, Debra Hernandez, Timothy Kearns, Encarni Medina-Lopez, Nazila Merati, Kevin O’Brien, Jonathan O’Neil, J. Potemra, Richard P. Signell, Kyle Wilcox
2019, Frontiers in Marine Science (6)
Advances in ocean observations and models mean increasing flows of data. Integrating observations between disciplines over spatial scales from regional to global presents challenges. Running ocean models and managing the results is computationally demanding. The rise of cloud computing presents an opportunity to rethink traditional approaches. This includes developing...
Optimizing an inner-continental shelf geologic framework investigation through data repurposing and machine learning
Elizabeth A. Pendleton, Laura L. Brothers, Ed Sweeney
2019, Geosciences (9)
The U.S. Geological Survey (USGS) and the National Oceanic Atmospheric Administration (NOAA) have collected approximately 5,400 km2 of geophysical and hydrographic data on the Atlantic continental shelf between Delaware and Virginia over the past decade and a half. Although originally acquired for different objectives, the comprehensive coverage and variety of...
The pathogenesis of H7 highly pathogenic avian influenza viruses in Lesser Scaup (Aythya affinis)
Christopher B. Stephens, Diann Prosser, Mary J. Pantin-Jackwood, Alicia Berlin, Erica Spackman
2019, Avian Diseases (63) 230-234
Waterfowl are the natural hosts of avian influenza virus (AIV), and through migration spread the virus worldwide. Most AIVs carried by wild waterfowl are low pathogenic strains; however, Goose/Guangdong/1996 lineage clade 2.3.4.4 H5 highly pathogenic (HP) AIV now appears to be endemic in wild birds in much of...
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...
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....
