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...
Projected urban growth in the Southeastern USA puts small streams at risk
Peter C. Van Metre, Ian R. Waite, Sharon L. Qi, Barbara Mahler, Adam Terando, Michael Wieczorek, Michael R. Meador, Paul M. Bradley, Celeste A. Journey, Travis S. Schmidt, Daren M. Carlisle
2019, PLoS ONE (10)
Future land-use development has the potential to profoundly affect the health of aquatic ecosystems in the coming decades. We developed regression models predicting the loss of sensitive fish (R2=0.39) and macroinvertebrate (R2=0.64) taxa as a function of urban and agricultural land uses and applied them to projected urbanization of...
The effect of brine on the electrical properties of methane hydrate
Ryan Lu, Laura A. Stern, Wyatt L. Du Frane, John C. Pinkston, J. Murray Roberts, S. Constable
2019, Journal of Geophysical Research (124) 10877-10892
Gas hydrates possess lower electrical conductivity (inverse of resistivity) than either seawater or ice, but higher than clastic silts and sands, such that electromagnetic methods can be employed to help identify their natural formation in marine and permafrost environments. Controlled laboratory studies offer a means to...
Nest survival of Black-necked Stilts (Himantopus mexicanus) on the upper Texas coast, USA
Thomas V. Riecke, Warren C. Conway, David A. Haukos, Jena A. Moon, Christopher E. Comer
2019, Waterbirds (42) 261-271
The Black-necked Stilt (Himantopus mexicanus) is a migratory shorebird of temperate and tropical America. Declining wetland quality and associated declines in hydrological integrity may contribute to widespread habitat loss for stilts nesting on the upper Texas Gulf of Mexico coast of the USA, as both fresh and brackish...
Detrital zircon geochronology along a structural transect across the Kahiltna assemblage in the western Alaska Range: Implications for emplacement of the Alexander-Wrangellia-Peninsular terrane against North America
Stephen E. Box, Susan M. Karl, James V. Jones III, Dwight Bradley, Peter J. Haeussler, Paul B. O’Sullivan
2019, Geosphere (15) 1774-1808
The Kahiltna assemblage in the western Alaska Range consists of deformed Upper Jurassic and Cretaceous clastic strata that lie between the Alexander-Wrangellia-Peninsular (AWP) terrane to the south, and the Farewell and other peri-cratonic terranes to the north. Differences in detrital zircon populations and sandstone petrography allow geographic separation of the...
A mechanistic understanding of ecological responses to land-use change in headwater streams
Richard H. Walker, Annika W. Walters
2019, Ecosphere (10)
Anthropogenic activities, such as oil and natural gas development (ONGD), have significantly altered the landscape. It is often challenging to identify the mechanistic processes underlying ecological responses to land-use change (LUC). In aquatic ecosystems, alterations to habitat and food availability and water quality associated with increased...
Stormquakes
Wenyuan Fan, Jeffrey J. McGuire, C. D. de Groot-Hedlin, M. A. H. Hedlin, S. Coats, J. W. Fiedler
2019, Geophysical Research Letters (46) 12918
Seismic signals from ocean-solid Earth interactions are ubiquitously recorded on our planet. However, these wavefields are typically incoherent in most frequency bands limiting their utilization for understanding ocean dynamics or solid Earth properties. In contrast, we find that during large storms such as hurricanes and Nor’easters the interaction of long-period...
Plant and insect herbivore community variation across the Paleocene–Eocene boundary in the Hanna Basin, southeastern Wyoming
Lauren E Schmidt, Regan E Dunn, Jason J Mercer, Marieke Dechesne, Ellen D Currano
2019, PeerJ
Ecosystem function and stability are highly affected by internal and external stressors. Utilizing paleobotanical data gives insight into the evolutionary processes an ecosystem undergoes across long periods of time, allowing for a more complete understanding of how plant and insect herbivore communities are affected by ecosystem imbalance. To study how...
Escherichia coli in the Santa Cruz River in Tumacácori National Historical Park, Arizona
Nicholas V. Paretti
2019, Fact Sheet 2019-3065
At Tumacácori National Historical Park in southern Arizona, resource managers are concerned about microbial pathogens in the Santa Cruz River that could pose a serious health risk to employees and visitors. The U.S. Geological Survey recently completed a comprehensive 3-year study of water quality in the Santa Cruz River watershed...
Spatial and temporal distribution of bacterial indicators and microbial-source tracking within Tumacácori National Historical Park and the upper Santa Cruz River, southern Arizona and northern Mexico, 2015–2016
Nicholas V. Paretti, Christopher M. Kephart, Thomas J. Porter, Edyth Hermosillo, Jay R. Cederberg, Justine P. Mayo, Bruce Gungle, Alissa L. Coes, Rachel S. Tucci, Laura M. Norman
2019, Scientific Investigations Report 2019-5108
Tumacácori National Historical Park (TUMA) in southern Arizona protects the culturally important Mission San José de Tumacácori, while also managing a part of the ecologically diverse riparian corridor of the Santa Cruz River. The quality of the water flowing through depends solely on upstream watershed activities, and among the water-quality...
Historic changes to floodplain systems in the Driftless Area
Colin S. Belby, Lindsay J Spigel, Faith A. Fitzpatrick
2019, Book chapter, The physical geography and geology of the Driftless Area: The career and contributions of James C. Knox
Floodplain systems in the Driftless Area have experienced widespread historical transformations in hydrologic and sediment characteristics as well as rates of hydrogeomorphic processes. These changes exceed natural variability experienced during the Holocene and are driven by nearly two centuries of major land-cover alterations coupled with shifting...
Oyster reefs in northern Gulf of Mexico estuaries harbor diverse fish and decapod crustacean assemblages: A meta-synthesis
Megan K. LaPeyre, D. A. Marshall, L. S. Miller, A. T. Humphries
2019, Frontiers in Marine Science (6)
Oyster reefs provide habitat for numerous fish and decapod crustacean species that mediate ecosystem functioning and support vibrant fisheries. Recent focus on the restoration of eastern oyster (Crassostrea virginica) reefs stems from this role as a critical ecosystem engineer. Within the shallow estuaries of the northern Gulf of Mexico (nGoM), the...
Morphodynamic resilience of intertidal mudflats on a seasonal time scale
Mick Van der Wegen, Dano Roelvink, Bruce E. Jaffe
2019, JGR Oceans (124) 8290-8308
Intertidal mudflats are morphodynamic features present in many estuaries worldwide. Often located between vegetated shores and deep channels they comprise valuable ecosystems and serve to protect the hinterland by attenuating waves. Although mudflats are persistently present on yearly to decadal time scales, little is known on their morphodynamic adaptation to...
Holocene Sea-Level Variability from Chesapeake Bay Tidal Marshes
Thomas M. Cronin, Megan K. Clevenger, Neil E. Tibert, Tammy Prescott, Michael Toomey, J. Bradford Hubeny, Mark B. Abbott, Julia Seidenstein, Hannah Whitworth, Samuel R Fisher, Nick Wondolowski, Anna Ruefer
2019, Holocene (29) 1979-1693
We reconstructed the last 10,000 years of Holocene relative sea-level rise (RSLR) from sediment core records in near Chesapeake Bay, eastern U.S.A., including new marsh records from the Potomac and Rappahannock Rivers, Virginia. Results show mean RSLR rates of 2.6 mm yr-1 from 10 to 8 kilo-annum (ka) due...
River water-quality concentration and flux estimation can be improved by accounting for serial correlation through an autoregressive model
Qian Zhang, Robert M. Hirsch
2019, Water Resources Research (55) 9705-9723
Accurate quantification of riverine water‐quality concentration and flux is challenging because monitoring programs typically collect concentration data at lower frequencies than discharge data. Statistical methods are often used to estimate concentration and flux on days without observations. One recently developed approach is the Weighted Regressions on Time, Discharge, and Season...
Infrasound from giant bubbles during explosive submarine eruptions
John J. Lyons, Matthew M. Haney, David Fee, Aaron Wech, Christopher F. Waythomas
2019, Nature Geoscience (12) 952-958
Shallow submarine volcanoes pose unique scientific and monitoring challenges. The interaction between water and magma can create violent explosions just below the surface, but the inaccessibility of submerged volcanoes means they are typically not instrumented. This both increases the risk to marine and aviation traffic and leaves the underlying eruption...
Riverine turtles select habitats maintained by natural discharge regimes in an unimpounded large river
Brian J. Tornabene, Matthew E. Jaeger, Robert G. Bramblett, Mark Nelson, Nathan McClenning, Trevor Watson, Alan Ankrum, Kenneth Frazer, Ann Marie Reinhold, Alexander V. Zale
2019, River Research and Applications (35) 1489-1498
Turtle populations are imperiled worldwide, but limited ecological information from unaltered systems hampers science‐based management and conservation of some species, especially riverine turtles such as the spiny softshell (Apalone spinifera). We therefore investigated movements and spatial habitat selection of 54 A. spinifera in 633 river kilometres (rkm) of the...
Calibration of the USGS National Hydrologic Model in ungauged basins using statistical at-site streamflow simulations
William Farmer, Jacob LaFontaine, Lauren Hay
2019, Journal of Hydrologic Engineering (24)
In the absence of measured streamflow, statistically simulated daily streamflow can be used to support the ability of physical models to represent hydrologic processes at ungauged locations. The objective of this study was to determine the feasibility of using statistical simulations in place of measured streamflow to calibrate physical...
Large loss of CO2 in winter observed across pan-arctic permafrost region
Susan M Natali, Jennifer D. Watts, Stefano Potter, Brendan M. Rogers, Sarah M. Ludwig, Anne-Katrin Selbmann, Patrick F. Sullivan, Benjamin W. Abbott, Kyle A. Arndt, Leah Birch, Mats P. Bjorkman, Anthony Bloom, Gerardo Celis, Torben R. Christiensen, Casper T. Christiansen, Roisin Commane, Elisabeth J. Cooper, Patrick Crill, Claudia Czimczik, Sergey Davydov, Jinyang Du, Jocelyn E. Egan, Bo Elberling, Eugenie S. Euskirchen, Thomas Friborg, Helene Genet, Mathias Gockede, Jordan P. Goodrich, Paul Grogan, Manuel Helbig, Elchin E. Jafarov, Julie Jastrow, Aram Kalhori, Yongwon Kim, John S Kimball, Lars Kutzbach, Mark J. Lara, Klaus S. Larsen, Michael M Loranty, Magnus Lund, Massimo Lupascu, Nima Madani, Avni Malhorta, Jack McFarland, David A. McGuire, Anders Michelson, Christina Minions, Walter C. Oechel, David Olefeldt, Frans-Jan Parmentier, Norbert Pirk, Benjamin Poulter, William L. Quinton, Fereidoun Rezanezhad, David Risk, Torsten Sachs, Kevin Schaefer, Neils M. Schmidt, Edward A. Schuur, Philipp R. Semenchuk, Gaius Shaver, Oliver Sonnentag, Gregory Starr, Claire C. Treat, Mark P. Waldrop, Yihui Wang, Jeffrey Welker, Christian Wille, Xiaofeng Xu, Zhen Zhang, Qianlai Zhuang, Donatella Zona
2019, Nature Climate Change (9) 852-857
Recent warming in the Arctic, which has been amplified during the winter1,<a id="ref-link-section-d35506e2410_1" title="Koenigk, T. et al. Arctic Climate Change in 21st...
