Geologic map of Jezero crater and the Nili Planum region, Mars
Vivian Z. Sun, Kathryn M. Stack
2020, Scientific Investigations Map 3464
The cratered highlands located northwest of Isidis Planitia have been recognized as one of the best preserved Noachian landscapes currently exposed on Mars; the area hosts a record of diverse surface processes, diagenesis, and aqueous alteration. This region has consistently been considered a high priority for landed-mission exploration and includes...
Quality of data from the U.S. Geological Survey National Water Quality Network for water years 2013–17
Laura Medalie, Laura M. Bexfield
2020, Scientific Investigations Report 2020-5116
Water samples from 122 sites in the U.S. Geological Survey National Water Quality Network were collected in 2013–17 to document ambient water-quality conditions in surface water of the United States and to determine status and trends of loads and concentrations for nutrients, contaminants, and sediment to estuaries and streams. Quality-control...
Metallogenic implications of a new geodynamic model for the Eglab, Algeria
Cliff D. Taylor, Dwight Bradley, Carol A. Finn, Arezki Zerrouki, Brahim Ayad, Nadjib F. Belanteur, Nabyl Bouchilaoune, Michaela Johnson, Ghania Meziane, Mark J. Mihalasky, Hamza Mouchene, Samir Oughou, Steven M. Smith, Federico Solano, Siham Zerrouk
2020, Conference Paper
No abstract available....
Ecological risk assessment of environmental stress and bioactive chemicals to riverine fish populations: An individual-based model of smallmouth bass Micropterus dolomieu
Yan Li, Vicki S. Blazer, Luke R. Iwanowicz, Megan K. Schall, Kelly Smalling, Donald E. Tillitt, Tyler Wagner
2020, Ecological Modelling (438) 1-16
Ecological risk assessments play an important role in environmental management and decision-making. Although empirical measurements of the effects of habitat changes and chemical exposure are often made at molecular and individual levels, environmental decision-making often requires the quantification of management-relevant, population-level outcomes....
Relative reproductive phenology and synchrony affect neonate survival in a nonprecocial ungulate
Eric S. Michel, Bronson K. Strickland, Stephen Demarais, Jerrold L. Belant, Todd M. Kautz, Jared F. Duquette, Dean E. Beyer Jr., Michael J. Chamberlain, Karl V. Miller, Rebecca M. Shuman, John C. Kilgo, Duane R. Diefenbach, Bret D. Wallingford, Justin K. Vreeland, Stephen S. Ditchkoff, Christopher S. DePerno, Christopher E. Moorman, M. Colter Chitwood, Marcus A. Lashley
2020, Functional Ecology (34) 2536-2547
Degree of reproductive synchronization in prey is hypothesized as a predator defense strategy reducing prey risk via predator satiation or predator avoidance. Species with precocial young, especially those exposed to specialist predators, should be highly synchronous to satiate predators (predator satiation hypothesis), while prey with nonprecocial (i.e. altricial) young, especially...
USGS Telemetry Project
Brent C. Knights, Marybeth K. Brey, Jessica C. Stanton, Travis J. Harrison, Douglas Appel, Enrika Hlavacek, James J. Duncker
2020, Report, Interim summary report 2020
Telemetry of acoustically tagged bigheaded carp (i.e., bighead carp Hypophthalmichthys nobilis and silver carp H. molitrix) and surrogate fish species has become an invaluable tool in management for these species in the upper Illinois Waterway Systems (i.e., upper Illinois River, lower Des Plaines River, and Chicago Area Waterway System). For...
A multispecies approach to manage effects of land cover and weather on upland game birds
A.R. Schindler, David A. Haukos, C.A. Hagen, Beth Ross
2020, Ecology and Evolution (10) 14330-14345
Loss and degradation of grasslands in the Great Plains region have resulted in major declines in abundance of grassland bird species. To ensure future viability of grassland bird populations, it is crucial to evaluate specific effects of environmental factors among species to determine drivers of population decline and develop effective...
Development and application of an empirical dune growth model for evaluating barrier island recovery from storms
Patricia (Soupy) Dalyander, Rangley C. Mickey, Davina Passeri, Nathaniel G. Plant
2020, Journal of Marine Science and Engineering (8)
Coastal zone managers require models that predict barrier island change on decadal time scales to estimate coastal vulnerability, and plan habitat restoration and coastal protection projects. To meet these needs, methods must be available for predicting dune recovery as well as dune erosion. In the present study, an empirical dune...
Quantitative textural measures of the aeromagnetic field: Two examples at regional scale
Mark E. Gettings
2020, Book chapter, An Introduction to Approaches and Modern Applications with Ensemble Learning
No abstract available....
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....
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...
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...
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...
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 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 C. 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...
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...
Critical shifts in trace metal transport and remediation performance under future low river flows
Patrick A. Byrne, Patrizia Onnis, Robert L. Runkel, Ilaria Frau, Sarah F. L. Lynch, Paul Edwards
2020, Environmental Science & Technology (54) 15742-15750
Exceptionally low river flows are predicted to become more frequent and more severe across many global regions as a consequence of climate change. Investigations of trace metal transport dynamics across streamflows reveal stark changes in water chemistry, metal transformation processes, and...
Assessment of Ambystomatid salamander populations and their breeding habitats in the Delaware Water Gap National Recreation Area
Craig D. Snyder, John A. Young, James T. Julian, Tim L. King, Shanon E. Julian
2020, Scientific Investigations Report 2020-5081
This report presents abundance and occurrence data for three species of ambystomad salamanders (Ambystoma maculatum, A. jeffersonianum, and A. opacum) collected over a 3-year period (2000, 2001, and 2002) at 200 potentional breeding sies within the Delaware Water Gap National Recreation Area (DEWA). In addition, numerous measures of inpond, near-pond,...
U.S. mineral supply chain security in the age of pandemics and trade wars
Nedal Nassar, Steven M. Fortier
2020, The Science Breaker
Modern technology makes use of numerous mineral commodities whose production is concentrated in a few countries. New research identifies the commodities whose supply disruption poses the greatest risk to the manufacturing sector. While the analysis is applied to the U.S. manufacturing sector, the principles are equally applicable to other economies...
