Assessment of undiscovered gas resources of the Fruitland Total Petroleum System, San Juan Basin Province, New Mexico and Colorado, 2020
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake II
2020, Fact Sheet 2020-3047
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 39 trillion cubic feet of gas within continuous and conventional reservoirs of the Fruitland Total Petroleum System in the San Juan Basin Province, New Mexico and Colorado....
Assessment of undiscovered gas resources in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado, 2020
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake II
2020, Fact Sheet 2020-3048
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 2.6 trillion cubic feet of gas in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado....
Behavior at short temporal scales drives dispersal dynamics and survival in a metapopulation of brook trout (Salvelinus fontinalis)
Tyler Wagner, Shannon White
2020, Freshwater Biology (66) 278-285
1) Movement has been studied extensively in stream salmonids, and most data suggest that population-level behavior is best described by a leptokurtic distribution. This distribution emphasizes the large proportion of sedentary individuals in a population, which can implicitly lead to assumptions of low population connectivity and overlook the ecological significance...
Decreases in aluminum toxicity and mortality of caged brook trout in Adirondack Mountain Streams
Barry P. Baldigo, Scott D. George
2020, Summary Report 20-35
Mortality of juvenile brook trout and water chemistry were characterized in six western Adirondack streams in northern New York State during spring 2015, 2016, and 2017 and compared with results from comparable tests done between 1980 and 2003 in many of the same streams to assess temporal changes in inorganic...
Comparing methods to estimate the proportion of turbine-induced bird and bat mortality in the search area under a road and pad search protocol
Joseph Maurer, Manuela Huso, Daniel Dalthorp, Lisa Madsen, Claudio Fuentes
2020, Environmental and Ecological Statistics (27) 769-801
Estimating bird and bat mortality at wind facilities typically involves searching for carcasses on the ground near turbines. Some fraction of carcasses inevitably lie outside the search plots, and accurate mortality estimation requires accounting for those carcasses using models to extrapolate from searched to unsearched areas....
Systematics, evolution, and genetics of bears
Andrew C Kitchener, Eva Bellemain, Xiang Ding, Alexander Kopatz, Verena Kutschera, Valentina Salomashkina, Manuel Ruiz-Garcia, Tabitha A. Graves, Yiling Hou, Lars Werdelin, Axel Janke
2020, Book chapter, Bears of the world: Ecology, conservation and management
Molecular genetics are key to understanding current and historical relationships between isolated populations, including species’ colonizations during glacial–interglacial cycles, to determine viability of local populations, needs for habitat corridors, and other aspects of population management, especially...
An analysis of streamflow trends in the southern and southeastern US from 1950-2015
Kirk D. Rodgers, Victor L. Roland II, Anne B. Hoos, Elena Crowley-Ornelas, Rodney Knight
2020, Water (12)
In this article, the mean daily streamflow at 139 streamflow-gaging stations (sites) in the southern and southeastern United States are analyzed for spatial and temporal patterns. One hundred and thirty-nine individual time-series of mean daily streamflow were reduced to five aggregated time series of Z scores for...
colorspace: A toolbox for manipulating and assessing colors and palettes
Achim Zeileis, Jason C. Fisher, Kurt Hornik, Ross Ihaka, Claire D. McWhite, Paul Murrell, Reto Stauffer, Claus O. Wilke
2020, Journal of Statistical Software (96)
The R package colorspace provides a flexible toolbox for selecting individual colors or color palettes, manipulating these colors, and employing them in statistical graphics and data visualizations. In particular, the package provides a broad range of color palettes based on the HCL (hue-chroma-luminance)...
The new Landsat Collection-2 Digital Elevation Model
Shannon Franks, James C. Storey, Rajagopalan Rengarajan
2020, Remote Sensing (12)
The Landsat Collection-2 distribution introduces a new global Digital Elevation Model (DEM) for scene orthorectification. The new global DEM is a composite of the latest and most accurate freely available DEM sources and will include reprocessed Shuttle Radar Topographic Mission (SRTM) data (called NASADEM), high-resolution stereo optical data (ArcticDEM), a...
Conservation genomics of the threatened western spadefoot, Spea hammondii, in urbanized southern California
Kevin M Neal, Robert N. Fisher, Milan J. Mitrovich, H. Bradley Shaffer
2020, Journal of Heredity (111) 613-627
Populations of the western spadefoot (Spea hammondii) in southern California occur in one of the most urbanized and fragmented landscapes on the planet and have lost up to 80% of their native habitat. Orange County is one of the last strongholds for this pond-breeding amphibian in the region, and...
Lateral carbon exports from drained peatlands: An understudied carbon pathway in the Sacramento-San Joaquin Delta, California
Christina M. Richardson, Joseph K. Fackrell, Tamara E. C. Kraus, Megan B. Young, Adina Paytan
2020, Journal of Geophysical Research: Biogeosciences (125)
Degradation of peatlands via drainage is increasing globally and destabilizing peat carbon (C) stores. The effects of drainage on the timing and magnitude of lateral C losses from degraded peatlands remains understudied. We measured spatial and temporal variability in lateral C exports from three drained peat islands in the Sacramento‐San...
Evidence of spawning by lake trout Salvelinus namaycush on substrates at the base of large boulders in northern Lake Huron
Steve A. Farha, Thomas Binder, Charles R. Bronte, Daniel B. Hayes, John Janssen, J. Ellen Marsden, Stephen Riley, Charles C. Krueger
2020, Journal of Great Lakes Research (46) 1674-1688
Identification of lake trout spawning sites has focused on cobble substrates associated with bathymetric relief (e.g., ‘contour’ or ‘slope’ along reefs), but this ‘model’ may be narrow in scope. Previous telemetry work conducted near Drummond Island, USA, Lake Huron, identified egg presence in...
Aeolian remobilisation of volcanic ash: Outcomes of a workshop in the Argentinian Patagonia
Paul A. Jarvis, Costanza Bonadonna, Lucia Dominguez, Pablo Forte, Corine Frischknecht, Donaldo Bran, Rigoberto Aguilar, Frances Beckett, Manuela Elissondo, John Gillies, Ulrich Kueppers, Jonathan Merrison, Nick Varley, Kristi L. Wallace
2020, Frontiers in Earth Science (8)
During explosive volcanic eruptions, large quantities of tephra can be dispersed and deposited over wide areas. Following deposition, subsequent aeolian remobilisation of ash can potentially exacerbate primary impacts on timescales of months to millennia. Recent ash remobilisation events (e.g., following eruptions of Cordón Caulle 2011; Chile, and Eyjafjallajökull 2010, Iceland)...
Evaluating the impacts of foreshore sand and birds on microbiological contamination at a freshwater beach
Ammar Saffaie, Chelsea J. Weiskerger, Meredith B. Nevers, Muruleedhara Byappanahalli, Mantha S. Phanikumar
2020, Water Research (190)
Beaches along the Great Lakes shorelines are important recreational and economic resources. However, contamination at the beaches can threaten their usage during the swimming season, potentially resulting in beach closures and/or advisories. Thus, understanding the dynamics that control nearshore water quality is integral to effective beach management. There have been...
Post-fire vegetation response in a repeatedly burned low-elevation sagebrush steppe protected area provides insights about resilience and invasion resistance
Tom Rodhouse, Kathryn M. Irvine, Lisa Bowersock
2020, Frontiers in Ecology and Evolution (8)
Sagebrush steppe ecosystems are threatened by human land-use legacies, biological invasions, and altered fire and climate dynamics. Steppe protected areas are therefore of heightened conservation importance but are few and vulnerable to the same impacts broadly affecting sagebrush steppe. To address this problem, sagebrush steppe conservation science is increasingly...
Towards the understanding of hydrogeochemical seismic responses in karst aquifers: A retrospective meta-analysis focused on the Apennines (Italy)
Gilberto Binda, Andrea Pozzi, Alessandro Michetti, Paula Noble, Michael R. Rosen
2020, Minerals (10)
Earthquakes are known to affect groundwater properties, yet the mechanisms causing chemical and physical aquifer changes are still unclear. The Apennines mountain belt in Italy presents a rich literature of case studies documenting hydrogeochemical response to seismicity, due to the high frequency of seismic events and the presence of different...
Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment
S.T. Wilson, A.N. Al-Haj, A. Bourbonnais, C. Frey, R.W. Fulweiler, John D. Kessler, H.K. Marchant, J Milucka, N.E. Ray, P Suntharalingham, B.F. Thornton, R.C. Upstill-Goddard, T.S. Weber, D.L. Arévalo-Martínez, H.W. Bange, H.M. Benway, D. Bianchi, A.V. Borges, B.X. Chang, P.M. Crill, D.A. del Valle, L. Farias, S.B. Joye, A. Kock, J Labidi, C.C. Manning, John Pohlman, G. Rehder, K.J. Sparrow, P.D. Tortell, T. Truede, D.L. Valentine, B.B. Ward, S. Yang, L.N. Yurganov
2020, Biogeosciences (17) 5809-5828
>In the current era of rapid climate change, accurate characterization of climate-relevant gas dynamics – namely production, consumption, and net emissions – is required for all biomes, especially those ecosystems most susceptible to the impact of change. Marine environments include regions that act as net sources or sinks for numerous...
Use of real-time sensors to temporally characterize water quality in groundwater and surface water in Mason County, Illinois, 2017–19
Lance R. Gruhn, William S. Morrow
2020, Scientific Investigations Report 2020-5108
The persistence of high nitrate concentrations in shallow groundwater has been well documented in the shallow glacial aquifer of Mason County, Illinois. Nitrates in groundwater can be a concern when concentrations exceed 10 milligrams per liter in drinking water. Additionally, nitrate in groundwater can contribute to surface water nitrogen loads...
Sphalerite oxidation in seawater with covellite: Implications for seafloor massive sulfide deposits and mine waste
Amy Gartman, Samantha P. Whisman, James R. Hein
2020, ACS Earth and Space Chemistry (4) 2261-2269
Metal sulfide minerals exist in several marine environments and are in thermodynamic disequilibrium with oxygenated seawater from the time of their formation. Oxidation is both ubiquitous and heterogeneous, as observational and experimental evidence demonstrates that sulfide minerals may oxidize completely on decadal...
Whitebark pine in the national parks of the Pacific states: An assessment of population vulnerability
Erik S Jules, Phillip J. van Mantgem, Benjamin G Iberle, Jonathan C B Nesmith, Regina M Rochefort
2020, Northwest Science (94) 129-141
Whitebark pine (Pinus albicaulis) is a long-lived tree found in high-elevation forests of western North America that is declining due to the non-native white pine blister rust (Cronartium ribicola) and climate-driven outbreaks of mountain pine beetle (Dendroctonus ponderosae; MPB). The National Park Service established a...
Geochemistry and age of groundwater in the Williston Basin, USA: Assessing potential effects of shale-oil production on groundwater quality
Peter B. McMahon, Joel M. Galloway, Andrew G. Hunt, Kenneth Belitz, Bryant Jurgens, Tyler D. Johnson
2020, Applied Geochemistry
Thirty water wells were sampled in 2018 to understand the geochemistry and age of groundwater in the Williston Basin and assess potential effects of shale-oil production from the Three Forks-Bakken petroleum system (TBPS) on groundwater quality. Two geochemical groups are identified...
Challenging our understanding of western Yellow-billed Cuckoo habitat needs and accepted management practices
P.J. Wohner, S.A. Laymon, J.E. Stanek, Sammy L. King, R.J. Cooper
2020, Restoration Ecology (29)
Riparian restoration in the southwestern United States frequently involves planting cottonwood (Populus spp.) and willow (Salix spp.). In the absence of flooding and gap-forming disturbance, planted forests often senesce without further young tree recruitment. This has largely been the case in California riparian systems that historically supported state-endangered western Yellow-billed Cuckoo (Coccyzus...
Bathymetric and velocimetric surveys at highway bridges crossing the Missouri and Mississippi Rivers on the periphery of Missouri, July–August 2018
Richard J. Huizinga
2020, Scientific Investigations Report 2020-5088
Bathymetric and velocimetric data were collected by the U.S. Geological Survey, in cooperation with the Missouri Department of Transportation, near 7 bridges at 6 highway crossings of the Missouri and Mississippi Rivers on the periphery of the State of Missouri from July 16 to August 13, 2018. A multibeam echosounder...
Predicted pH of groundwater in the Mississippi River Valley alluvial and Claiborne aquifers, south-central United States
James A. Kingsbury, Katherine J. Knierim, Connor J. Haugh
2020, Scientific Investigations Map 3465
Regional aquifers in the Mississippi embayment are the principal sources of water used for public and domestic supply, irrigation, and industrial uses throughout the region. An understanding of how water quality varies spatially, temporally, and with depth are critical aspects to ensuring long-term sustainable use of these resources. A boosted...
Multiple-well monitoring site adjacent to the North and South Belridge Oil Fields, Kern County, California
Rhett R. Everett, Anthony A. Brown, Janice M. Gillespie, Adam Kjos, Nicole C. Fenton
2020, Open-File Report 2020-1116
The U.S. Geological Survey (USGS), in cooperation with the California State Water Resources Control Board, is evaluating several questions about oil and gas development and groundwater resources in California, including (1) the location of groundwater resources; (2) the proximity of oil and gas operations to groundwater and the geologic materials...
