A new technique to calculate earthquake stress transfer and to forecast aftershocks
Margarita Segou, Thomas E. Parsons
2020, Bulletin of the Seismological Society of America (110) 863-873
Coseismic stress changes have been the primary physical principle used to explain aftershocks and triggered earthquakes. However, this method does not adequately forecast earthquake rates and diverse rupture populations when subjected to formal testing. We show that earthquake forecasts can be impaired by assumptions made in physics-based models, such as...
Semiautomated estimates of directivity and related source properties of small to moderate southern California earthquakes using second seismic moments
Haoran Meng, Jeffrey J. McGuire, Yehuda Ben-Zion
2020, Journal of Geophysical Research (125)
We develop a semiautomated method for estimating with second seismic moments the directivity, rupture area, duration, and centroid velocity of earthquakes. The method is applied to 41 southern California earthquakes with magnitude in the range 3.5–5.2 and provides stable results for 28 events. Apparent source time functions (ASTFs) of P and S phases are...
Paddlefish management and conservation: Opportunities and challenges at home and abroad
Cecil A. Jennings
2020, Fisheries Magazine (45) 334-334
Ratcheting up rigor in wildlife management decision making
Angela K. Fuller, Daniel J. Decker, Michael V. Schiavone, Ann Forstchen
2020, Wildlife Society Bulletin (44) 29-41
The wildlife management institution has been transforming to ensure relevance and positive conservation outcomes into the future. Continuous improvement of decision making is one aspect of this transformation, but many obstacles hinder systematic approaches to decision making. One can point to examples of formal decision science applications by state and...
Bridging the research-management gap: Landscape ecology in practice on public lands in the western United States
Sarah K. Carter, David S. Pilliod, Travis S. Haby, Karen L. Prentice, Cameron L. Aldridge, Patrick J. Anderson, Zachary H. Bowen, John B. Bradford, Samuel A. Cushman, Joseph C. DeVivo, Michael C. Duniway, Ryan S. Hathaway, Lisa Nelson, Courtney A. Schultz, Rudy Schuster, E. Jamie Trammell, Jake Weltzin
2020, Landscape Ecology (35) 545-560
The field of landscape ecology has grown and matured in recent decades, but incorporating landscape science into land management decisions remains challenging. Many lands in the western United States are federally owned and managed for multiple uses, including recreation, conservation, and energy development. We argue for stronger integration of landscape...
Geology and assessment of undiscovered oil and gas resources of the Sverdrup Basin Province, Arctic Canada, 2008
Marilyn E. Tennyson, Janet K. Pitman
Thomas E. Moore, Donald L. Gautier, editor(s)
2020, Professional Paper 1824-I
The Sverdrup Basin Province, an area of 515,000 square kilometers on the northern margin of North America, extends 1,300 kilometers across the Canadian Arctic Islands from near the Mackenzie Delta to northern Ellesmere Island. It consists of an intracratonic late Paleozoic to early Cenozoic rift-sag basin and a Mesozoic rift...
Short-term forecasts of insect phenology inform pest management
Theresa M. Crimmins, Katharine L. Gerst, Diego Huerta, R. Lee Marsh, Erin E. Posthumus, Alyssa H. Rosemartin, Jeff R. Switzer, Jake Weltzin, Len Coop, Nicholas Dietschler, Daniel A. Herms, Samita Limbu, R. Talbot Trotter, Mark Whitmore
2020, Annals of the Entomological Society of America (113) 139-148
Insect pests cost billions of dollars per year globally, negatively impacting food crops and infrastructure, and contributing to the spread of disease. Timely information regarding developmental stages of pests can facilitate early detection and control, increasing efficiency and effectiveness. In 2018, the U.S. National Phenology Network (USA-NPN) released a suite...
Linking monitoring and data analysis to predictions and decisions for the range-wide eastern black rail status assessment
Conor P. McGowan, N. Angeli, W. Beisler, C.W. Snyder, N.M. Rankin, J. Woodrow, J. Wilson, E. Rivenbark, A. Schwarzer, C. Hand, R.M. Anthony, R. Griffin, K. Barrett, A. Haverland, N. Roach, T. Schneider, A. J. Smith, F. Smith, J. Tolliver, Bryan D Watts
2020, Endangered Species Research (43) 209-222
The US Fish and Wildlife Service has initiated a re-envisioned approach for providing decision makers with the best available science and synthesis of that information, called the Species Status Assessment (SSA), for endangered species decision making. The SSA report is a descriptive document that provides decision makers with an assessment...
Mixed organic and inorganic tapwater exposures and potential effects in greater Chicago area, USA
Paul Bradley, Maria Argos, Dana W. Kolpin, Shannon M. Meppelink, Kristin M. Romanok, Kelly L. Smalling, Michael J. Focazio, Joshua M. Allen, Julie E. Dietze, Michael J. Devito, Ariel Donovan, Nicola Evans, Carrie E. Givens, James L. Gray, Christopher P. Higgins, Michelle L. Hladik, Luke Iwanowicz, Celeste A. Journey, Rachael F. Lane, Zachary R. Laughrey, Keith A. Loftin, R. Blaine McCleskey, Carrie A. McDonough, Elizabeth K Medlock Kakaley, Michael T. Meyer, Andrea Holthouse-Putz, Susan D Richardson, Alan Stark, Christopher P. Weis, Vickie S. Wilson, Abderrahman Zehraoui
2020, Science of the Total Environment (719)
Safe drinking water at the point of use (tapwater, TW) is a public-health priority. TW exposures and potential human-health concerns of 540 organics and 35 inorganics were assessed in 45 Chicago area United States (US) homes in 2017. No US Environmental Protection Agency (EPA) enforceable Maximum Contaminant Level(s) (MCL) were...
Geology and assessment of undiscovered oil and gas resources of the Franklinian Shelf Province, Arctic Canada and North Greenland, 2008
Marilyn E. Tennyson, Janet K. Pitman
Thomas E. Moore, Donald L. Gautier, editor(s)
2020, Professional Paper 1824-H
In 2008, the U.S. Geological Survey assessed the potential for undiscovered oil and gas resources of the Franklinian Shelf Province of northern Canada and Greenland as part of the U.S. Geological Survey Circum-Arctic Resource Appraisal Program. The Franklinian Shelf Province lies along the northernmost edge of the North American craton...
Basin amplification effects in the Puget Lowland, Washington from strong motion recordings and 3D simulations
Mika Thompson, Erin A. Wirth, Arthur D. Frankel, J. Renate Hartog, John E. Vidale
2020, Bulletin of the Seismological Society of America (110) 534-555
Sedimentary basins in the Puget Sound region, Washington State, increase ground‐motion intensity and duration of shaking during local earthquakes. We analyze Pacific Northwest Seismic Network and U.S. Geological Survey strong‐motion recordings of five local earthquakes (M 3.9–6.8), including the 2001 Nisqually earthquake, to characterize sedimentary basin...
Integrating broad‐scale data to assess demographic and climatic contributions to population change in a declining songbird
Jim Saracco, Madeleine A. Rubenstein
2020, Ecology and Evolution (10) 1804-1816
Climate variation and trends affect species distribution and abundance across large spatial extents. However, most studies that predict species response to climate are implemented at small spatial scales or are based on occurrence‐environment relationships that lack mechanistic detail. Here, we develop an integrated population model (IPM)...
Identification of factors affecting predation risk for juvenile turtles using 3D printed models
S.J. Tetzlaff, A. Estrada, Brett Alexander DeGregorio, J. H. Sperry
2020, Animals (10)
Although it is widely accepted that juvenile turtles experience high levels of predation, such events are rarely observed, providing limited evidence regarding predator identities and how juvenile habitat selection and availability of sensory cues to predators affects predation risk. We placed three-dimensional printed models resembling juvenile box...
Oil-source rock correlation studies in the unconventional Upper Cretaceous Tuscaloosa marine shale (TMS) petroleum system, Mississippi and Louisiana, USA
Paul C. Hackley, Kristin Opferkuch Dennen, Daniel Garza, Celeste Lohr, Brett Valentine, Javin J. Hatcherian, Catherine B. Enomoto, Frank T. Dulong
2020, Journal of Petroleum Science and Engineering (190)
The U.S. Geological Survey assessed undiscovered unconventional hydrocarbon resources reservoired in the Upper Cretaceous Tuscaloosa marine shale (TMS) of southern Mississippi and adjacent Louisiana in 2018. As part of the assessment, oil-source rock correlations were examined in the TMS play area where operators produce light (38–45° API), sweet oil from...
Hydrogeologic characterization, groundwater chemistry, and vulnerability assessment, Ute Mountain Ute Reservation, Colorado and Utah
Nancy J. Bauch, L. Rick Arnold
2020, Scientific Investigations Report 2019-5122
The U.S. Geological Survey, in cooperation with the Ute Mountain Ute Tribe (UMUT), initiated a study in 2016 to increase understanding of the hydrogeology and chemistry of groundwater within select areas of the Ute Mountain Ute Reservation (UMUR) in Colorado and Utah, identify vulnerabilities to the system and other natural...
Impacts of mineralogical variation on CO2 behavior in small pores from producing intervals of the Marcellus Shale: Results from neutron scattering
Leslie F. Ruppert, Aaron M. Jubb, Thomas F Headen, Tristan G. A. Youngs, Bryan Bandli
2020, Energy & Fuels (34) 2765-2771
The Near and InterMediate Range Order Diffractometer (NIMROD) was used to examine the potential impact of shale mineralogy on CO2 behavior within micropores. Two samples with varying mineral compositions were obtained from producing intervals in the dry gas window in the Middle...
Quantifying 40 years of rockfall activity in Yosemite Valley with historical Structure-from-Motion photogrammetry and terrestrial laser scanning
Antoine Guerin, Greg M. Stock, Mariah J. Radue, Michel Jaboyedoff, Brian D. Collins, Battista Matasci, Nikita Avdievitch, Marc-Henri Derron
2020, Geomorphology (356)
Rockfalls and rockslides are often dominant geomorphic processes in steep bedrock landscapes, but documenting their occurrence can be challenging, requiring frequent monitoring and well resolved spatial data. Repeat application of remote sensing methods such as Terrestrial Laser Scanning (TLS) and Structure-from-Motion...
Inexpensive, underwater filming of rare fishes in high definition
Scott A. Bonar, Taylor Ulrich
2020, Fisheries Magazine (45) 121-130
Generating public interest in fish and their biology is often challenging. Many aquatic species are cryptic and largely invisible to the public. Therefore, increasing public awareness of cryptic fishes and elevating their visibility to broad audiences requires innovation. Inexpensive technological advancements now provide fisheries biologists, managers,...
Assessing establishment and growth of agricultural plantings on reservoir mudflats
D. M. Norris, H.R. Hatcher, M. E. Colvin, G. Coppola, M. A. Lashley, Leandro E. Miranda
2020, North American Journal of Fisheries Management (40) 394-405
Winter drawdowns in flood control reservoirs create expansive mudflats that lack the vegetation typical of littoral zones, which reduces the amount of structure available for fish habitat. This study investigated the feasibility of establishing agricultural plantings as a management action to ameliorate mudflats by providing structural...
Modelling pinniped abundance and distribution by combining counts at terrestrial sites and in-water sightings
Steven L. Whitlock, Jamie N. Womble, James T. Peterson
2020, Ecological Modelling (420)
Pinnipeds are commonly monitored using aerial photographic surveys at land- or ice-based sites, where animals come ashore for resting, pupping, molting, and to avoid predators. Although these counts form the basis for monitoring population change over time, they do not provide information...
Estuarine submerged aquatic vegetation habitat provides organic carbon storage across a shifting landscape
E. R. Hillman, V. H. Rivera-Monroy, A. J. Nyman, Megan K. La Peyre
2020, Science of the Total Environment (717)
Submerged aquatic vegetation (SAV) thrives across the estuarine salinity gradient providing valuable ecosystem services. Within the saline portion of estuaries, seagrass areas are frequently cited as hotspots for their role in capturing and retaining organic carbon (Corg). Non-seagrass SAV, located in the fresh to brackish estuarine areas, may also retain...
Genes in space: What Mojave desert tortoise genetics can tell us about landscape connectivity
Kirsten E. Dutcher, Amy G. Vandergast, Todd Esque, Anna Mitelberg, Marjorie D Matocq, Jill S. Heaton, Ken E Nussear
2020, Conservation Genetics (21) 289-303
Habitat loss and fragmentation in the Mojave Desert have been increasing, which can create barriers to movement and gene flow leading to decreased populations of native species. Disturbance and degradation of Mojave desert tortoise habitat includes linear features (e.g. highways, railways, and a network of dirt roads), urbanized areas, and...
Seismicity of the Earth 1900–2018
Gavin P. Hayes, Gregory M. Smoczyk, Antonio H. Villasenor, Kevin P. Furlong, Harley M. Benz
2020, Scientific Investigations Map 3446
This map illustrates 119 years of global seismicity in the context of global plate tectonics and the Earth’s physiography. Primarily designed for use by earth scientists, engineers, and educators, this map provides a comprehensive overview of strong (magnitude [M] 5.5 and larger) earthquakes since 1900. The map clearly identifies the...
Determining the drivers of suspended sediment dynamics in tidal marsh-influenced estuaries using high-resolution ocean color remote sensing
Xiaohe Zhang, Cedric Fichot, Carly Baracco, Ruizhe Guo, Sydney Neugebauer, Zachary Bengtsson, Neil K. Ganju, Sergio Fagherazzi
2020, Remote Sensing (240)
Sediment budgets are a critical metric to assess coastal marsh vulnerability to sea-level rise and declining riverine sediment inputs. However, calculating accurate sediment budgets is challenging in tidal marsh-influenced estuaries where suspended sediment concentrations (SSC) typically vary on scales of hours and meters, and where SSC dynamics are driven by...
Water quality and ecological risk assessment of intermittent streamflow through mining and urban areas of San Marcos River sub-basin, Mexico
Elisenda Lopez, Reynaldo Patino, Maria L. Vazquez-Sauceda, Roberto Perez-Castaneda, Leonardo U. Arellano-Mendez, Rene Ventura-Houle, Lorenzo Heyer
2020, Environmental Nanotechnology, Monitoring & Management (14)
Intermittent rivers are becoming more ecologically stressed worldwide. Flow cessation occurs naturally and spatiotemporally in these systems and anthropogenic activities such as wastewater discharges can have considerable impacts. Public entities mostly monitor water quality in permanent streams, leading to insufficient monitoring of intermittent streams and consequently to their potentially inadequate...
