Identifying credible and diverse GCMs for regional climate change studies—case study: Northeastern United States
Ambarish V. Karmalkar, Jeanne M. Thibeault, Alexander Bryan, Anji Seth
2019, Climatic Change (154) 367-386
Climate data obtained from global climate models (GCMs) form the basis of most studies of regional climate change and its impacts. Using the northeastern US as a test case, we develop a framework to systematically sub-select reliable models for use in climate change studies in the region. We retain 14...
Assessment of continuous gas resources in the Permian Phosphoria Formation of the Southwestern Wyoming Province, Wyoming, 2019
Christopher J. Schenk, Tracey J. Mercier, Thomas M. Finn, Kristen R. Marra, Phuong A. Le, Heidi M. Leathers-Miller, Janet K. Pitman, Michael E. Brownfield, Ronald M. Drake II
2019, Fact Sheet 2019-3047
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 1.4 trillion cubic feet of continuous gas in the Phosphoria Formation of the Southwestern Wyoming Province, Wyoming....
Debris-flow monitoring and warning: Review and examples
Marcel Hurlimann, Velio Coviello, Coraline Bel, Xiaojun Guo, Matteo Berti, Christoph Graf, Johannes Hubl, Shusuke Miyata, Joel B. Smith, Hsiao-Yuan Yin
2019, Earth-Science Reviews (199)
Debris flows represent one of the most dangerous types of mass movements, because of their high velocities, large impact forces and long runout distances. This review describes the available debris-flow monitoring techniques and proposes recommendations to inform the design of future monitoring and warning/alarm systems. The selection and application of...
Comparisons of stereological and other approaches for quantifying macrophage aggregates in piscine spleens
Mark A Matsche, Vicki S. Blazer, Patricia M. Mazik
2019, Journal of Aquatic Animal Health (31) 328-348
Macrophage aggregates (MA s) are focal accumulations of pigmented macrophages in the spleen and other tissues of fish. A central role of MA s is the clearance and destruction of degenerating cells and recycling of some cellular components. Macrophage aggregates also respond to chemical contaminants and infectious agents and may...
Total grain size distribution of an intense Hawaiian fountaining event: Case study of the1959 Kīlauea Iki eruption
Sebastian B Mueller, Bruce F. Houghton, Donald A. Swanson, Matthieu Poret, Sarah A. Fagents
2019, Bulletin of Volcanology (81)
The 1959 eruption of Kīlauea Iki on the Island of Hawai’i is a principal example of powerful Hawaiian fountaining. Over 36 days (including repose periods), 16 fountaining episodes created a small cone, a downwind tephra blanket of approximately 0.003 km3 and a lava lake of about 0.04 km3 volume. During the explosive activity, the maximum...
Ecosystem size predicts social dynamics in recreational fisheries
M. A. Kaemingk, C. J. Chizinski, Craig R. Allen, Kevin L. Pope
2019, Ecology and Society (24)
Recreational fisheries are complex adaptive systems that are inherently difficult to manage due to a heterogeneous user group (consumptive vs. non-consumptive) that utilize patchily distributed resources on the landscape (lakes, rivers, coastlines). There is a need to identify which system components can effectively predict and be used to manage...
Prey fish communities of the Laurentian Great Lakes: A cross-basin overview of status and trends based on bottom trawl surveys, 1978-2016
Owen Gorman
2019, Aquatic Ecosystem Health & Management (22) 263-279
Annual bottom trawl surveys were initiated in the 1970s in Laurentian Great Lakes Superior, Huron, Michigan and Ontario and in 1990 in Erie to provide annual assessments of the status and trends of prey fish communities. Native Cisco Coregonus artedi and Bloater C. hoyi dominated the prey fish community of Lake Superior. Prey fish...
Historical land use and land cover for assessing the northern Colorado Front Range urban landscape
Mark A. Drummond, Michael P. Stier, James E. Diffendorfer
2019, Journal of Maps (15) 89-93
We describe historical land-use and land-cover (LULC) maps for the northern Colorado urban Front Range. The Front Range urban landscape is diverse and interspersed with highly productive agriculture as well as natural land cover types including evergreen forest in the Rocky Mountain foothills and Great Plains grassland. To understand the...
Comparing and improving methods for reconstructing peatland water-table depth from testate amoebae
Connor Nolan, John Tipton, Robert K. Booth, Mevin Hooten, Stephen Jackson
2019, Holocene (29) 1350-1361
Proxies that use changes in the composition of ecological communities to reconstruct temporal changes in an environmental covariate are commonly used in paleoclimatology and paleolimnology. Existing methods, such as weighted averaging and modern analog technique, relate compositional data to the covariate in very simple ways, and different methods are seldom compared...
Differential effects of temperature and salinity on growth and mortality of oysters (Crassostrea virginica) in Barataria Bay and Breton Sound, Louisiana
T. Sehlinger, M.R. Lowe, Megan K. LaPeyre, T.M. Soniat
2019, Journal of Shellfish Research (38) 317-326
Temperature and salinity and their interaction exert a major control on the life cycle of the eastern oyster (Crassostrea virginica), affecting reproduction, development, growth, and mortality. Quantifying specific temperature and salinity relationships on oyster growth and mortality has however proven difficult, with data suggesting potentially region-specific responses. Legacy and recent...
A Generalized Additive Model approach to evaluating water quality: Chesapeake Bay Case Study
Rebecca Murphy, Elgin Perry, Jon Harcum, Jennifer L. Keisman
2019, Environmental Modelling & Software (118)
Nutrient-reduction efforts have been undertaken in recent decades to mitigate the impacts of eutrophication in coastal and estuarine systems worldwide. To track progress in response to one of these efforts we use Generalized Additive Models (GAMs) to evaluate a diverse suite of water quality constituents over a 32-year period in...
Where was the 31 October 1895, Charleston, Missouri Earthquake?
Stacey S. Martin, Susan E. Hough
2019, Bulletin of the Seismological Society of America (109) 1479-1497
We revisit the magnitude and location of the 31 October 1895 Charleston, Missouri earthquake, which is widely regarded to be the last MW6 or greater earthquake in the central United States. Although a recent study (Bakun et al., 2003) concluded that this earthquake was located in southern Illinois, over 100...
Dextral, normal, and sinistral faulting across the eastern California shear zone-Mina deflection transition, California-Nevada
Kevin DeLano, Jeffrey Lee, Rachelle Roper, Andrew T. Calvert
2019, Geosphere (15) 1206-1239
Strike-slip faults commonly include extensional and contractional bends and stepovers, whereas rotational stepovers are less common. The Volcanic Tableland, Black Mountain, and River Spring areas (California and Nevada, USA) (hereafter referred to as the VBR region) straddle the transition from the dominantly NW-striking dextral faults that define the northwestern part...
A new set of basaltic tephras from southeastern Alaska represent key stratigraphic markers for the late Pleistocene
Paul S. Wilcox, Jason A. Addison, Sarah J. Fowell, James F. Baichtal, Ken Severin, Daniel H. Mann
2019, Quaternary Research (92) 246-256
An 8-cm-thick black basaltic tephra with nine discrete normally graded beds is present in cores from a lake on Baker Island in southeastern Alaska. The estimated age of the tephra is 13,492 ± 237 cal yr BP. Although similar in age to the MEd tephra from the adjacent Mt. Edgecumbe...
Geese mediate vegetation state changes with parallel effects on N cycling that leave nutritional legacies for offspring
Roger W. Ruess, Jack McFarland, Brian T. Person, James S. Sedinger
2019, Ecosphere (10)
Along the coastal fringe of the Yukon–Kuskokwim River Delta in southwestern Alaska, geese maintain grazing lawns dominated by a rhizomatous sedge that, when ungrazed, transitions to a taller, less palatable growth form that is taxonomically described as a different species. Nutrients recycled in goose feces, in conjunction with grazing, are...
Relevance of wind stress and wave-dependent ocean surface roughness on the generation of winter meteotsunamis in Northern Gulf of Mexico
Lijing Shi, Maitane Olabarrieta, Arnoldo Valle-Levinson, John C. Warner
2019, Ocean Modeling (140)
Meteotsunamis associated with passing squall lines are often observed ahead of cold fronts during winter seasons in Northern Gulf of Mexico. These types of meteotsunamis occur simultaneously with wind speed variations (~5-20 m/s) and sea-level atmospheric pressure oscillations (~1-6 hPa) with periods between 2 hours to several minutes. In order...
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...
