Ar-Ar age constraints on the timing of Havre Trough opening and magmatism
Richard Wysoczanski, Graham S. Leonard, James F. Gill, Ian Wright, Andrew T. Calvert, William McIntosh, Brian Jicha, John A Gamble, Christian Timm, Monica Handler, Elizabeth Kathleen Drewes-Todd, Alex Zohrab
2019, New Zealand Journal of Geology and Geophysics (62) 371-377
The age and style of opening of the Havre Trough back-arc system is uncertain due to a lack of geochronologic constraints for the region. 40Ar/39Ar dating of 19 volcanic rocks from across the southern Havre Trough and Kermadec Arc was conducted in three laboratories to provide age constraints on the system....
Temporal relationship between the Lassen Volcanic Center and mafic regional volcanism
Aurelie Germa, Chris Perry, Xavier Quidelleur, Andrew T. Calvert, Michael A. Clynne, Chuck Connor, Laura Connor, Rocco Malservisi, Sylvain Charbonnier
2019, Bulletin of Volcanology (81)
Monogenetic volcanoes, distributed over large areas, contribute to the growth of monogenetic volcanic fields (MVFs) over thousands to millions of years of activity. It is now accepted that MVFs are also temporally clustered. To reduce uncertainties inherent to this episodic character, it is critical to combine multi-disciplinary studies to improve...
Identifying salt marsh shorelines from remotely sensed elevation data and imagery
Amy S. Farris, Zafer Defne, Neil K. Ganju
2019, Remote Sensing (11)
Salt marshes are valuable ecosystems that are vulnerable to lateral erosion, submergence, and internal disintegration due to sea-level rise, storms, and sediment deficits. Because many salt marshes are losing area in response to these factors, it is important to monitor their lateral extent at high resolution over multiple timescales. In...
Intense hurricane activity over the past 1500 years at South Andros Island, The Bahamas
Elizabeth Wallace, Jeffrey P. Donnelly, Peter J. van Hengstum, Charlotte Winman, Richard Sullivan, Tyler Winkler, Nicole D'Entremont, Michael Toomey, Nancy A. Albury
2019, Paleoceanography and Paleoclimatology (34) 1761-1783
Hurricanes cause substantial loss of life and resources in coastal areas. Unfortunately, historical hurricane records are too short and incomplete to capture hurricane-climate interactions on multi-decadal and longer timescales. Coarse-grained, hurricane-induced deposits preserved in blue holes in the Caribbean can provide records of past hurricane activity extending back thousands of...
Review of indicators for comparing environmental effects across energy sources
Monica Dorning, James E. Diffendorfer, Scott R Loss, Kenneth J. Bagstad
2019, Environmental Research Letters (14)
Robust, quantitative comparisons of environmental effects across energy sources can support development of energy planning strategies that meet growing demand while managing and minimizing undesirable effects on environmental resources. Multicriteria analyses of energy systems often use a suite of indicators to make such comparisons, but those indicators and their units...
Life cycle of the trout cecal nematode, Truttaedacnitis truttae (Nematoda: Cucullanidae): Experimental and field observations
Anindo Choudhury, Rebecca A. Cole
2019, Journal of Parasitology (105) 769-782
Truttaedacnitis truttae is a cucullanid nematode of primarily salmonine fishes. Brown trout (Salmo trutta) in Europe reportedly become parasitized by ingesting lampreys (Lampetra planeri) carrying infective larvae. However, our field and laboratory observations suggested that North American specimens of T. truttae have an alternative life cycle. High abundances and potential impact of T. truttae in...
Morphological identification of Bighead Carp, Silver Carp, and Grass Carp eggs using random forests machine learning classification
Carlos A. Camacho, Christopher J. Sullivan, Michael J. Weber, Clay Pierce
2019, North American Journal of Fisheries Management (39) 1373-1384
Visual identification of fish eggs is difficult and unreliable due to a lack of information on the morphological egg characteristics of many species. We used random forests machine learning to predict the identity of genetically identified Bighead Carp Hypophthalmichthys nobilis, Grass Carp Ctenopharyngodon idella, and Silver Carp H. molitrix eggs based on egg morphometric and...
Multi-decade mortality and a novel homolog of hepatitis C virus in bald eagles (Haliaeetus leucocephalus), the national bird of the USA
Tony L. Golberg, Samuel D. Sibley, Marie E. Pinkerton, Christopher D. Dunn, Lindsey Long, C. LeAnn White, Sean M. Strom
2019, Scientific Reports (9)
The bald eagle (Haliaeetus leucocephalus) once experienced near-extinction but has since rebounded. For decades, bald eagles near the Wisconsin River, USA, have experienced a lethal syndrome with characteristic clinical and pathological features but unknown etiology. Here, we describe a novel hepacivirus-like virus (Flaviviridae: Hepacivirus) identified during an investigation of Wisconsin...
The HayWired earthquake scenario—Societal consequences
Shane T. Detweiler, Anne M. Wein, editor(s)
2019, Scientific Investigations Report 2017-5013-R–W
The HayWired Earthquake Scenario—Societal Consequences is the third volume of U.S. Geological Survey (USGS) Scientific Investigations Report 2017–5013, which describes the HayWired scenario, developed by USGS and its partners. The scenario is a hypothetical yet scientifically realistic earthquake sequence that is being used to better understand hazards for the San...
Annual winter site fidelity of Barrow's goldeneyes in the Pacific
Megan Willie, Daniel Esler, W. Sean Boyd, Timothy D. Bowman, Jason Schamber, Jonathan Thompson
2019, Journal of Wildlife Management (84) 161-171
Coastal regions on the Pacific north coast of North America provide important wintering habitat for many species of sea ducks. Although winter range and habitat preferences are well described for most species, fidelity to coastal wintering sites is generally undocumented. Fidelity is an important factor necessary for understanding interactions with...
Estimated use of water in Georgia for 2015 and water-use trends, 1985–2015
Jaime A. Painter
2019, Open-File Report 2019-1086
Water-withdrawal, water-use, and water-return information have been collected and compiled for each county in Georgia every 5 years since 1980 using data obtained from various Federal, State, and private agencies, as well as additional online sources. For 2015, water use, water withdrawal, and water returns were estimated for each county,...
Characterizing range-wide population divergence in an alpine-endemic bird: A comparison of genetic and genomic approaches
Kathryn Langin, Cameron L. Aldridge, Jennifer A. Fike, Robert S. Cornman, Kathy M Martin, Greg T Wann, Amy E. Seglund, Michael A Schroeder, David P Benson, Brad C. Fedy, Jessica R. Young, Scott D. Wilson, Don H Wolfe, Clait E. Braun, Sara J. Oyler-McCance
2019, Conservation Genetics (19) 1471-1485
The delineation of intraspecific units that are evolutionarily and demographically distinct is an important step in the development of species-specific management plans. Neutral genetic variation has served as the primary data source for delineating “evolutionarily significant units,” but with recent advances in genomic technology, we now have an unprecedented ability...
Climate-driven state shifts in the Prairie Pothole Region: Assessing future impacts relevant to the management of wetland habitats critical to waterfowl
David M. Mushet, Owen P. McKenna
2019, Report
Embedded within the North American Prairie Pothole Region (PPR) are millions of small, depressional wetlands that annually support 50–80% of the continent’s waterfowl production. We recently assembled evidence that demonstrates a change towards a wetter climate that is driving a shift in the state of the region’s wetland ecosystems. This...
Controls on eolian landscape evolution in fractured bedrock
Jonathan P. Perkins, Noah J. Finnegan, Shanaka L. de Silva, Michael J. Willis
2019, Geophysical Research Letters (46) 12012-12020
Wind abrasion is important for planetary landscape evolution, and wind‐abraded bedrock landscapes contain many landforms that are difficult to interpret. Here we exploit a natural experiment in Chile where topographic shielding by an upwind lava flow yields diverse erosional landforms in a downwind ignimbrite. Using a 3‐D topographic wind model,...
Variability in results from mineralogical and organic geochemical interlaboratory testing of U. S. Geological Survey shale reference materials
Justin E. Birdwell, Stephen A. Wilson
2019, Conference Paper, Proceedings of the 7th Unconventional Resources Technology Conference
The expansion of unconventional petroleum resource exploration and production in the United States has led to an increase in source rock characterization efforts, particularly related to bulk organic and mineralogical properties. To support the analytical and research needs of industry and academia, as well as internal work, the U.S. Geological...
Evolutionary history predicts high-impact invasions by herbivorous insects
Angela M. Mech, Kathryn A. Thomas, Travis D. Marsico, Daniel A. Herms, Craig Allen, Matthew P. Ayres, Kamal J.K. Gandhi, Jessica Gurevitch, Nathan P. Havill, Ruth A. Hufbauer, Andrew M. Liebhold, Kenneth F. Raffa, Ashley N. Schulz, Daniel R. Uden, Patrick C. Tobin
2019, Ecology and Evolution (9) 12216-12230
A long‐standing goal of invasion biology is to identify factors driving highly variable impacts of non‐native species. Although hypotheses exist that emphasize the role of evolutionary history (e.g., enemy release hypothesis & defense‐free space hypothesis), predicting the impact of non‐native herbivorous insects has eluded scientists for over a century. Using a...
Competitive interactions among H, CU, and Zn ion moderate aqueous uptake of Cu and Zn by an aquatic insect
Daniel J. Cain, Marie Noele Croteau, Christopher C. Fuller
2019, Environmental Pollution (255)
The absorption of aqueous copper (Cu) and zinc (Zn) by aquatic insects, a group widely used to assess water quality, is unresolved. This study examined interactions among Cu, Zn, and protons that potentially moderate Cu and Zn uptake by the acid-tolerant stonefly Zapada sp. Saturation uptake kinetics was imposed to...
Mechanics of inflationary deformation during Caldera collapse: Evidence from the 2018 Kīlauea Eruption
Paul Segall, Kyle R. Anderson, Ingrid A. Johanson, Asta Miklius
2019, Geophysical Research Letters (46) 11782-11789
During the 2018 Kilauea eruption the caldera ffloor dropped 500 meters in 62 nearly periodic events of up to 8 meters. Caldera collapse maintains pressure in the magma reservoir necessary to sustain high-rate eruptions. The 2018 collapses were accompanied by inflationary tilts and displacements, similar to observations at other basaltic...
A geographic hot spot of Ichthyophonus infection in the southern Salish Sea, USA
Paul Hershberger, Ashley MacKenzie, Jacob Gregg, A Lindquist, T Sandell, Maya L. Groner, D Lowry
2019, Diseases of Aquatic Organisms (136) 157-162
The prevalence of Ichthyophonus infection in Pacific herring Clupea pallasii was spatially heterogeneous in the southern Salish Sea, Washington State, USA. Over the course of 13 mo, 2232 Pacific herring were sampled from 38 midwater trawls throughout the region. Fork length was positively correlated with Ichthyophonus infection at all sites....
Hurricane Matthew: Predictions, observations, and an analysis of coastal change
Justin J. Birchler, Kara S. Doran, Joseph W. Long, Hilary F. Stockdon
2019, Open-File Report 2019-1095
Hurricane Matthew, the strongest Atlantic hurricane of the 2016 hurricane season, made land-fall south of McClellanville, S.C., around 1500 Coordinated Universal Time (UTC) on October 8, 2016. Hurricane Matthew affected the States of Florida, Georgia, South Carolina, and North Carolina along the U.S. Atlantic coastline. Numerous barrier islands were breached,...
Insights into post-Miocene uplift of the western margin of the Colorado Plateau from the stratigraphic record of the lower Colorado River
Ryan S. Crow, Keith A. Howard, L. Sue Beard, Phil Pearthree, Kyle House, Karl Karlstrom, Lisa Peters, William C. McIntosh, Colleen Cassidy, Tracey J. Felger, Debra Block
2019, Geosphere (15) 1826-1845
The spatial and temporal distribution of Pliocene to Holocene Colorado River deposits (southwestern USA and northwestern Mexico) form a primary data set that records the evolution of a continental-scale river system and helps to delineate and quantify the magnitude of regional deformation. We focus in particular on the age and...
Evaluating the effects of barriers on Slimy Sculpin movement and population connectivity using novel sibship-based and traditional genetic metrics
Spencer Y. Weinstein, Jason A. Coombs, Keith H. Nislow, Chris Riley, Allison H. Roy, Andrew R. Whiteley
2019, Transactions of the American Fisheries Society (148) 1117-1131
Population genetics-based approaches can provide robust and cost-effective ways to assess the effects of potential barriers, including dams and road-stream crossings, on the passage and population connectivity of aquatic organisms. Determining the best way to apply and modify genetic tools for different species and situations is essential for making these...
The 30 November 2018 Mw7.1 Anchorage Earthquake
Michael E. West, Adrian Bender, Matthew Gardine, Lea Gardine, Kara Gately, Peter J. Haeussler, Wael Hassan, Franz Meyer, Cole Richards, Natalia Ruppert, Carl Tape, John Thornley, Robert C. Witter
2019, Seismological Research Letters (91) 66-84
The Mw">Mw 7.1 47 km deep earthquake that occurred on 30 November 2018 had deep societal impacts across southcentral Alaska and exhibited phenomena of broad scientific interest. We document observations that point to future directions...
Vertical distribution of microplastics in the water column and surficial sediment from the Milwaukee River basin to Lake Michigan
Peter L. Lenaker, Austin K. Baldwin, Steven R. Corsi, Sherri A. Mason, Paul C. Reneau, John W Scott
2019, Environmental Science & Technology (53) 12227-12237
Microplastic contamination was studied along a freshwater continuum from inland streams to the Milwaukee River estuary to Lake Michigan, and vertically from the water surface, water subsurface and sediment. Microplastics were detected in all 96 water samples and nine sediment samples collected. Results indicated a gradient of polymer presence with...
Economic valuation of Landsat imagery
Crista L. Straub, Stephen R. Koontz, John B. Loomis
2019, Open-File Report 2019-1112
Landsat satellites have been operating since 1972, providing a continuous global record of the Earth’s land surface. The imagery is currently available at no cost through the U.S. Geological Survey (USGS). A previous USGS study estimated that Landsat imagery provided users an annual benefit of $2.19 billion in 2011, with...
