Evidence for frequent, large tsunamis spanning locked and creeping parts of the Aleutian megathrust
Robert C. Witter, Richard W. Briggs, Simon E. Engelhart, Guy R. Gelfenbaum, Richard D Koehler, Alan R. Nelson, SeanPaul La Selle, Reide Corbett, Kristi L. Wallace
2019, Geological Society of America Bulletin (131) 707-729
At the eastern end of the 1957 Andreanof Islands magnitude-8.6 earthquake rupture, Driftwood Bay (Umnak Island) and Stardust Bay (Sedanka Island) lie along presently locked and creeping parts of the Aleutian megathrust, respectively, based on satellite geodesy onshore. Both bays, located 200-km apart, face the Aleutian trench and harbor coastal...
Ross Ice Shelf response to climate driven by the tectonic imprint on seafloor bathymetry
K J Tinto, L Padman, C S Siddoway, M.R. Springer, H.A. Fricker, I. Das, F. Caratori Tontini, D.F. Porter, N.P. Frearson, S. J. Howard, M.R. Siegfried, C. Mosbeux, M.K. Becker, C. Bertinato, A. Boghosian, N. Brady, Bethany L. Burton, W. Chu, S.I. Cordero, T. Dhakal, L. Dong, C.D. Gustafson, S. Keeshin, C. Locke, A. Lockett, G. O'Brien, J.J. Spergel, S.E. Starke, M. Tankersley, M. Wearing, R. E. Bell
2019, Nature Geoscience (12) 441-449
Ocean melting has thinned Antarctica's ice shelves at an increasing rate over the past two decades, leading to loss of grounded ice. The Ross Ice Shelf is currently close to steady state but geological records indicate that it can disintegrate rapidly, which would accelerate grounded ice loss from catchments...
Application of a towed time-domain electromagnetic (tTEM) imaging system in Jamestown, North Dakota
Carole D. Johnson, Joshua Valder, Eric A. White, Pradip Kumar Maurya, David Hisz, John W. Lane Jr.
2019, Conference Paper, Symposium on the application of geophysics to engineering and environmental problems proceedings
Time-Domain Electromagnetic (EM) methods have been used for decades in support of groundwater investigations. A new towed Time-Domain EM system called “tTEM”, designed by Aarhus University, is being tested and evaluated under a collaborative research agreement with the U.S. Geological Survey (USGS). The tTEM system is rapid and efficient, providing...
Remembering F. Peter Haeni - "What did we learn from this?"
Carole D. Johnson, John W. Lane Jr.
2019, Conference Paper, Symposium on the application of geophysics to engineering and environmental problems proceedings
Frederick Peter (‘Pete’) Haeni grew up on Long Island, New York, where he developed a lifelong love of the water —–a love that continued with his family in Deep River, Connecticut, and at their Eagle Island cottage in Maine. Pete was always at home on the water — whether sailing,...
Negative frequency-dependent foraging behaviour in a generalist herbivore (Alces alces) and its stabilizing influence on food-web dynamics
Sarah R. Hoy, John A. Vucetich, Rongsong Liu, Don DeAngelis, Rolf O. Peterson, Leah M. Vucetich, John J. Henderson
2019, Journal of Applied Ecology (88) 1291-1304
1. Resource selection is widely appreciated to be context‐dependent and shaped by both biological and abiotic factors. However, few studies have empirically assessed the extent to which selective foraging behaviour is dynamic and varies in response to environmental conditions for free‐ranging animal populations. 2. Here, we assessed the extent that forage...
Development and characterization of polymorphic microsatellite markers in Northern Fulmar, Fulmarus glacialis (Procellariformes), and cross-species amplification in eight other seabirds
Megan C. Gravley, George K. Sage, Andrew M. Ramey, Scott A. Hatch, Verena A. Gill, Jolene R. Rearick, Aevar Petersen, Sandra L. Talbot
2019, Genes and Genomics (41) 1015-1026
BackgroundIn the North Pacific, northern fulmar (Fulmarus glacialis) forms extensive colonies in few locales, which may lead to limited gene flow and locale-specific population threats. In the Atlantic, there are thousands of colonies of varying sizes and in Europe the species is considered...
Use of a towed electromagnetic induction (tTem) system for shallow aquifer characterization – An example from the Mississippi Alluvial Plain
Eric A. White, Carole D. Johnson, Pradip Kumar Maurya, Wade Kress, David B. Kelly, John W. Lane
2019, Conference Paper, Symposium on the application of geophysics to engineering and environmental problems proceedings
The Mississippi Alluvial Plain (MAP) aquifer system is a vital resource that supports agriculture in one of the most productive regions of the country. The U.S. Geological Survey Water Availability and Use Science Program (WAUSP) is conducting a multi-discipline investigation of the MAP aquifer system. The investigation is utilizing borehole,...
Evidence for a role of arginine vasotocin (AVT) receptors in the gill during salinity acclimation by a euryhaline teleost fish
Sean C. Lema, Elise H Washburn, Mary E Crowley, Paul G Carvalho, Jennifer N Egelston, Stephen D. McCormick
2019, American Journal of Physiology - Regulatory, Integrative and Comparative Physiology (316) R735-R750
The neurohypophysial nonapeptide arginine vasotocin (AVT) plays a role in regulation of osmotic balance in teleost fishes, but its mechanisms of action are not fully understood. Recently, is was discovered that nonapeptide receptors differentiated into V1a-type, several V2-type, and two isotocin (IT) receptor paralogs in teleost fishes, and it remains...
Estimation of ground motion variability in the CEUS using simulations
Xiaodan Sun, Sanaz Rezaeian, Brandon Clayton, Stephen H. Hartzell
Stephen H. Hartzell, editor(s)
2019, Conference Paper, ICASP 13 Proceedings
We estimate earthquake ground-motion variability in the central and eastern U.S. (CEUS) by varying the model parameters of a deterministic physics-based and a stochastic site-based simulation method. Utilizing a moderate-magnitude database of recordings, we simulate ground motions for larger-magnitude scenarios M6.0, 6.5, 7.0, 7.5, and 8.0. For the physics-based method,...
Probabilistic seismic hazard analysis using stochastic simulated ground motions
Sarah Azar, Mayssa Dabaghi, Sanaz Rezaeian
2019, Conference Paper, Proceedings of ICASP13
: In recent years, ground motion models used in probabilistic seismic hazard analyses (PSHA) have evolved from the traditional approach of using ground motion prediction equations (GMPEs) to using ground motion time series models. The purpose of this paper is to develop an approach to perform a probabilistic seismic hazard...
A three-pipe problem: Dealing with complexity to halt amphibian declines
Sarah J. Converse, Evan H. Campbell Grant
2019, Biological Conservation (236) 107-114
Natural resource managers are increasingly faced with threats to managed ecosystems that are largely outside of their control. Examples include land development, climate change, invasive species, and emerging infectious diseases. All of these are characterized by large uncertainties in timing, magnitude,...
Mismatches between breeding phenology and resource abundance of resident alpine ptarmigan negatively affect chick survival
Gregory T Wann, Cameron L. Aldridge, Amy E. Seglund, Sara J. Oyler-McCance, Boris C. Kondratieff, Clait E. Braun
2019, Ecology and Evolution (9) 7200-7212
1. Phenological mismatches – defined here as the difference in reproductive timing of an individual relative to the availability of its food resources – occur in many avian species. Mistiming breeding activities in environments with constrained breeding windows may have severe fitness costs due to reduced opportunities for repeated breeding...
Implications of seismic design values for economic losses
Dustin Cook, Abbie B. Liel, Nico Luco, Edward Almeter, Curt B. Haselton
2019, Conference Paper
In the U.S., seismic design values are determined mostly through a risk-targeting process, which combines information about the expected collapse fragility of code-designed structures with seismic hazard at a site. However, this target only applies where the risk-targeted ground motions govern the design. In other areas, primarily close to active...
Characterizing groundwater/surface-water interaction using hydrograph-separation techniques and groundwater-level data throughout the Mississippi Delta, USA
Courtney D. Killian, William H. Asquith, Jeannie R. B. Barlow, Gardner C. Bent, Wade Kress, Paul M. Barlow, Darrel W. Schmitz
2019, Hydrogeology Journal (27) 2167-2179
The Mississippi Delta, located in northwest Mississippi, is an area dense with industrial-level agriculture sustained by groundwater-dependent irrigation supplied by the Mississippi River Valley Alluvial aquifer (alluvial aquifer). The Delta provides agricultural commodities across the United States and around the world. Observed declines in groundwater altitudes and streamflow contemporaneous with...
Conservation research across scales in a national program: How to be relevant to local management yet general at the same time
Michael J. Adams, Erin L. Muths
2019, Biological Conservation (236) 100-106
Successfully addressing complex conservation problems requires attention to pattern and process at multiple spatial scales. This is challenging from a logistical and organizational perspective. In response to indications of worldwide declines in amphibian populations, the Amphibian Research and Monitoring Initiative (ARMI) of the United States Geological Survey was established in...
Predicting hydrologic disturbance of streams using species occurrence data
J.T. Fox, Daniel D. Magoulick
2019, Science of the Total Environment (686) 254-263
Aquatic organisms have adapted over evolutionary time-scales to hydrologic variability represented by the natural flow regime of rivers and streams in their unimpaired state. Rapid landscape change coupled with growing human demand for water have altered natural flow regimes of many rivers and streams...
Vertical coseismic offsets from differential high-resolution stereogrammetric DSMs: The 2013 Baluchistan, Pakistan earthquake
William D. Barnhart, Ryan D. Gold, Hannah N. Shea, Katherine E. Peterson, Richard W. Briggs, David J. Harbor
2019, Journal of Geophysical Research B: Solid Earth (124) 6039-6055
The recent proliferation of high-resolution (< 3-m spatial resolution) digital topography datasets opens a spectrum of geodetic applications in differential topography, including the quantification of coseismic vertical displacement fields. Most investigations of coseismic vertical displacements to date rely, in part, on pre- or post-event lidar surveys that are intractable or...
Effect of hydrologic, geomorphic, and vegetative conditions on avian communities in the Middle Rio Grande of New Mexico
S. W. Hamilton, Sammy L. King, G. Dello Russo
2019, Wetlands (39) 1029-1042
We evaluated relationships among hydrogeomorphology, vegetation structure and composition, and avian communities among three subreaches of the San Acacia Reach of the Middle Rio Grande (MRG) River of New Mexico. The subreaches varied in degradation, with Subreach 1 being severely entrenched and hydrologically disconnected, Subreach 2 being the least impacted,...
Global phylodynamic analysis of avian paramyxovirus-1 provides evidence of inter-host transmission and intercontinental spatial diffusion
Joseph T. Hicks, Kiril M. Dimitrov, Claudio L. Afonso, Andrew M. Ramey, Justin Bahl
2019, BMC Evolutionary Biology (19)
BackgroundAvian avulavirus (commonly known as avian paramyxovirus-1 or APMV-1) can cause disease of varying severity in both domestic and wild birds. Understanding how viruses move among hosts and geography would be useful for informing prevention and control efforts. A Bayesian statistical framework was employed to...
Toward explaining nitrogen and phosphorus trends in Chesapeake Bay tributaries, 1992-2012
Scott Ator, Ana M. Garcia, Gregory E. Schwarz, Joel Blomquist, Andrew J. Sekellick
2019, Journal of the American Water Resources Association (55) 1149-1168
Understanding trends in stream chemistry is critical to watershed management, and often complicated by multiple contaminant sources and landscape conditions changing over varying time scales. We adapted spatially-referenced regression (SPARROW) to infer causes of recent nutrient trends in Chesapeake Bay tributaries by relating observed fluxes during 1992, 2002, and 2012...
A global synthesis of lava lake dynamics
Einat Lev, Philipp Ruprecht, Clive Oppenheimer, Nial Peters, Matthew R. Patrick, Pedro Hernandez, Letizia Spampinato, Jeffrey J. Marlow
2019, Journal of Volcanology and Geothermal Research (381) 16-31
Active lava lakes represent a variety of open-vent volcanism in which a sizeable body of lava accumulates at the top of the magma column, constrained by the vent and/or crater geometry. The longevity of lava lakes reflects a balancing of cooling and outgassing occurring at the surface by input of...
Comparison of a simple hydrostatic and a data-intensive 3D numerical modeling method of simulating sea-level rise induced groundwater inundation for Honolulu, Hawai'i, USA
Shellie Habel, Charles H. Fletcher, Kolja Rotzoll, Aly I. El-Kadi, Delwyn S. Oki
2019, Environmental Research Letters (1)
Groundwater inundation (GWI) is a particularly challenging consequence of sea-level rise (SLR), as it progressively inundates infrastructure located above and below the ground surface. Paths of flooding by GWI differ from other types of SLR flooding (i.e., wave overwash, storm-drain backflow) such that it is more difficult to mitigate, and...
Planning for ecological drought: Integrating ecosystem services and vulnerability assessment
Nejem Raheem, Amanda E. Cravens, Molly S. Cross, Shelley D. Crausbay, Aaron R. Ramirez, Jamie McEvoy, Dionne Zoanni, Deborah J. Bathke, Michael Hayes, Shawn Carter, Madeleine Rubenstein, Ann Schwend, Kimberly R. Hall, Paul Suberu
2019, WIREs Water (6)
As research recognizes the importance of ecological impacts of drought to natural and human communities, drought planning processes need to better incorporate ecological impacts. Drought planning currently recognizes the vulnerability of some ecological impacts from drought (e.g., loss of instream flow affecting fish populations). However, planning often does not identify...
Drilling, construction, water chemistry, water levels, and regional potentiometric surface of the upper carbonate-rock aquifer in Clark County, Nevada, 2009–2015
Jon W. Wilson
2019, Scientific Investigations Map 3434
The U.S. Geological Survey (USGS) and the Bureau of Land Management (BLM) initiated a cooperative study through the Southern Nevada Public Land Management Act (Bureau of Land Management, 1998) to install six wells in the carbonate-rock and basin-fill aquifers of Clark County, Nevada, in areas of sparse groundwater data. This...
A comparison of riparian vegetation sampling methods along a large, regulated river
Emily C. Palmquist, Sarah Sterner, Barbara Ralston
2019, River Research and Applications (35) 759-767
Monitoring riparian vegetation cover and species richness is an important component of assessing change and understanding ecosystem processes. Vegetation sampling methods determined to be the best option in other ecosystems (e.g., desert grasslands and arctic tundra) may not be the best option in multilayered, species rich,...
