Bathymetry of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 at the U.S. Air Force Academy, Colorado, 2019
Michael S. Kohn, Laura A. Hempel
2020, Scientific Investigations Map 3463
The U.S. Geological Survey, in cooperation with the U.S. Air Force Academy (USAFA), carried out bathymetric and topographic surveys to characterize the volume of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 at the U.S. Air Force Academy, Colorado. Bathymetric maps of each...
Development of a suite of functional immune assays and initial assessment of their utility in wild smallmouth bass health assessments
Cheyenne R. Smith, Christopher A. Ottinger, Heather L. Walsh, Vicki S. Blazer
2020, Open-File Report 2020-1077
Methods were developed for measuring immune function in Micropterus dolomieu (smallmouth bass). The ultimate objective is to monitor and evaluate changes over time in immune status and disease resistance in conjunction with other characteristics of fish health and environmental stressors. To test these methods for utility in ecotoxicological studies, 192...
Yellowstone's Old Faithful Geyser shut down by a severe 13th century drought
Shaul Hurwitz, John King, Gregory T. Pederson, Justin Martin, David Damby, Michael Manga, Jefferson Hungerford, Sara Peek
2020, Geophysical Research Letters (47)
To characterize eruption activity of the iconic Old Faithful Geyser in Yellowstone National Park over past centuries, we obtained 41 new radiocarbon dates of mineralized wood preserved in the mound of silica that precipitated from erupted waters. Trees do not grow on active geyser mounds, implying that...
Localized fault-zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes
William D. Barnhart, Ryan D. Gold, James Hollingsworth
2020, Nature Geoscience (13) 699-704
Earthquakes produce a spectrum of elastic and inelastic deformation processes that are reflected across various length and time scales. While elasticity has long dominated research assumptions in active tectonics, increasing interest has focused on the inelastic characteristics of earthquakes, particularly those of the surface fault rupture...
Habitat characterization and species distribution model of the only large-lake population of the endangered Silver Chub (Macrhybopsis storeriana, Kirtland 1844)
James E. McKenna Jr., Patrick Kocovsky
2020, Ecology and Evolution (10) 12076-12090
The endangered Silver Chub (Macrhybopsis storeriana, Kirtland 1844) is native to North America and primarily riverine, with the only known large‐lake population in Lake Erie. Once a major component of the Lake Erie fish community, it declined and became nearly extirpated in the mid‐1900s. Recent collections in...
A novel approach for next generation water use mapping using Landsat and Sentinel-2 satellite data
Ramesh Singh, Kul Bikram Khand, Stefanie Kagone, Matthew Schauer, Gabriel Senay, Zhuoting Wu
2020, Hydrological Sciences Journal (65) 2508-2519
Evapotranspiration (ET) is needed in a range of applications in hydrology, climatology, ecology, and agriculture. Remote sensing-based estimation is the only viable and economical method for ET estimation over large areas. The current Landsat satellites provide images every 16 days limiting the ability to capture biophysical changes affecting...
Seismic reflection imaging of the low-angle Panamint normal fault system, eastern California
Ryan D. Gold, William J. Stephenson, Richard W. Briggs, Christopher DuRoss, Eric Kirby, Edward W Woolery, Jaime Delano, Jackson K. Odum
2020, JGR Solid Earth (125)
Shallowly dipping (<30°) low‐angle normal faults (LANFs) have been documented globally; however, examples of active LANFs in continental settings are limited. The western margin of the Panamint Range in eastern California is defined by a LANF that dips west beneath Panamint Valley and has evidence of Quaternary motion. In addition,...
Spatiotemporal pattern of interactions between an apex predator and sympatric species
Marta P Guitart, David P Onorato, James E. Hines, Madan K. Oli
2020, Journal of Mammology (101) 1279-1288
Increases in apex predator abundance can influence the behavior of sympatric species, particularly when the available habitat and/or resources are limited. We assessed the temporal and spatiotemporal interactions between Florida panthers (Puma concolor coryi) and six focal sympatric species in South Florida, where Florida panther abundance has increased by more...
Estimating flood magnitude and frequency on streams and rivers in Connecticut, based on data through water year 2015
Elizabeth A. Ahearn, Glenn A. Hodgkins
2020, Scientific Investigations Report 2020-5054
The U.S. Geological Survey, in cooperation with the Connecticut Department of Transportation, updated flood-frequency estimates with 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (2-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence intervals, respectively) for 141 streamgages in Connecticut and 11 streamgages in adjacent...
Transmissivity estimated from brief aquifer tests of domestic wells and compared with bedrock lithofacies and position on hillsides in the Appalachian Plateau of New York
Allan D. Randall, Andrew C. Mills
2020, Scientific Investigations Report 2020-5087
Procedures for undertaking and analyzing recovery from aquifer tests of 13 to 132 seconds (described in reports cited herein) were applied to 51 domestic drilled wells that penetrated bedrock outside major valleys in the part of the Appalachian Plateau of New York drained by the Susquehanna River. Transmissivities calculated from...
A clarification on the effects of urbanization on Golden Eagle (Aquila chrysaetos) habitat selection
Jeff A. Tracey, Melanie C. Madden, Peter H. Bloom, Robert N. Fisher
2020, Open-File Report 2020-1110
IntroductionIn 2018, the U.S. Geological Survey (USGS) published an Open-File Report (Tracey and others, 2018) presenting a Bayesian habitat selection model for golden eagles (Aquila chrysaetos) in San Diego County, California. The model used telemetry data to examine the effects of urban development, exurban development, and...
Identifying the greatest earthquakes of the past 2000 years at the Nehalem River Estuary, Northern Oregon Coast, USA
Alan R. Nelson, Andrea D. Hawkes, Yuki Sawai, Simon E. Engelhart, Robert C. Witter, Wendy C. Grant-Walter, Lee-Ann Bradley, Tina Dura, Niamh Cahill, Benajamin P. Horton
2020, Open Quaternary (6) 1-30
We infer a history of three great megathrust earthquakes during the past 2000 years at the Nehalem River estuary based on the lateral extent of sharp (≤3 mm) peat-mud stratigraphic contacts in cores and outcrops, coseismic subsidence as interpreted from fossil diatom assemblages and reconstructed with foraminiferal assemblages using a...
The eruptive history, magmatic evolution, and influence of glacial ice at long-lived Akutan volcano, eastern Aleutian Islands, Alaska, USA
Michelle L. Coombs, Brian Jicha
2020, GSA Bulletin
New 40Ar/39Ar and whole-rock geochemical data are used to develop a detailed eruptive chronology for Akutan volcano, Akutan Island, Alaska, USA, in the eastern Aleutian island arc. Akutan Island (166°W, 54.1°N) is the site of long-lived volcanism and the entire island comprises volcanic rocks as old as 3.3 Ma. Our current...
A review of an electric weir and fishway in a Great Lakes tributary from conception to termination
Jenna Tews, Jean V. Adams, Kevin Mann, Ellie Koon, John Heinrich
2020, Journal of Great Lakes Research (47) S297-S309
A successful management plan requires clear goals and a process for evaluation. Without them, managers risk operational shifts in which continuous changes disguised as improvements may have little beneficial effect. The conception, design, and operation of an electric barrier and fishway on the Pere Marquette River of Lake Michigan serve...
Extraformational sediment recycling on Mars
Kenneth S. Edgett, Steven Banham, Kristen A. Bennett, Lauren A. Edgar, Christopher S. Edwards, Alberto Fairen, Christopher M. Fedo, Deirdra M. Fey, James B. Garvin, John P. Grotzinger, Sanjeev Gupta, Marie Henderson, Christopher H House, Nicolas Mangold, Scott McLennan, Horton E. Newsom, Scott Rowland, Kirsten L. Siebach, Lucy Thompson, Scott VanBommel, Roger C. Wiens, Rebecca Williams, Aileen Yingst
2020, Geosphere (6) 1508-1537
Extraformational sediment recycling (old sedimentary rock to new sedimentary rock) is a fundamental aspect of Earth’s geological record; tectonism exposes sedimentary rock, whereupon it is weathered and eroded to form new sediment that later becomes lithified. On Mars, tectonism has been minor, but two decades...
Decontamination of Ceratocystis pathogens responsible for rapid ʻŌhiʻa Death
Kylle Roy, Kelly Jaenecke, Nikko Bjontegard, Dan Mikros, Ellen Dunkle, Corie Yanger, Lionel S. Sugiyama, Lisa M. Keith, Robert W. Peck
2020, Plant Health Progress (21) 301-305
Rapid ʻōhiʻa death (ROD) is caused by two recently described species of Ceratocystis, C. lukuohia and C. huliohia. These fungi are decimating ʻōhiʻa lehua (Metrosideros polymorpha), the keystone native tree species of Hawaiʻi. Viable Ceratocystis propagules can persist in ambrosia beetle frass (Coleoptera: Scolytinae), and movement of the frass...
Water balance as an indicator of natural resource condition: Case studies from Great Sand Dunes National Park and Preserve
David P. Thoma, Michael T. Tercek, E. William Schweiger, Seth M. Munson, John E. Gross, S. Tom Olliff
2020, Global Ecology and Conservation (24)
Managing climate impacts to natural resources in protected areas can be hampered by lack of monitoring data, poor understanding of natural resource responses to climate, or lack of timely condition assessments that can inform management actions. Here we demonstrate the utility...
Using movement to inform conservation corridor design for Mojave desert tortoise
Steven J. Hromada, Todd Esque, Amy G. Vandergast, Kirsten E. Dutcher, Corey I Mitchell, Miranda E Gray, Tony Chang, Brett G. Dickson, Kenneth E. Nussear
2020, Movement Ecology (8)
BackgroundPreserving corridors for movement and gene flow among populations can assist in the recovery of threatened and endangered species. As human activity continues to fragment habitats, characterizing natural corridors is important in establishing and maintaining connectivity corridors within the anthropogenic development matrix. The Mojave desert tortoise (Gopherus agassizii)...
Spatially explicit reconstruction of post-megafire forest recovery through landscape modeling
Wenru Xu, Hong He, Jacob S. Fraser, Todd Hawbaker, Paul D. Henne, Shengwu Duan, Zhiliang Zhu
2020, Environmental Modelling and Software (134)
Megafires are large wildfires that occur under extreme weather conditions and produce mixed burn severities across diverse environmental gradients. Assessing megafire effects requires data covering large spatiotemporal extents, which are difficult to collect from field inventories. Remote sensing provides an alternative...
Pacific herring Clupea pallasii are not susceptible to vibriosis from Vibrio anguillarum or V. ordalii under laboratory conditions
Paul Hershberger, M.E.T Stinson, Brenda L Hall, Ashley MacKenzie, Jacob L. Gregg, William August Richards, James Winton
2020, Journal of Fish Diseases (43) 1607-1609
The ubiquity of Vibrio spp. throughout the coastal marine waters of the Pacific Northwest of North America raises questions about the susceptibility of native marine fishes, including Pacific herring (Clupea pallasii). Early reports of Vibriolike disease (Rucker et al., 1954; Walford, 1958) and Vibrio sp. isolations (Pacha & Kiehn, 1969)...
The effects of management practices on grassland birds—Brewer’s Sparrow (Spizella breweri breweri)
Brett L. Walker, Lawrence D. Igl, Jill A. Shaffer
2020, Professional Paper 1842-AA
Keys to Brewer’s Sparrow (Spizella breweri breweri) management include maintaining extensive, unfragmented patches of suitable breeding habitat; reducing conifer cover and height; preventing the invasion of conifers and nonnative plants, especially cheatgrass (downy brome [Bromus tectorum]); minimizing disturbance to soil; and restricting the use of pesticides and herbicides during the...
Headwaters fed by subterranean ice: Potential climate refugia for alpine stream communities?
Lusha M. Tronstad, Scott Hotaling, J. Joseph Giersch, Oliver J. Wilmot, Debra S. Finn
2020, Western North American Naturalist (3) 395-407
Near-term extirpations of macroinvertebrates are predicted for mountain streams worldwide as a warming climate drives the recession of high-elevation ice and snow. However, hydrological sources likely vary in their resistance to climate change, and thus streams fed by more resistant sources could persist as climate refugia for imperiled biota. In...
Can oceanic prey effects on growth and time to fledging mediate terrestrial predator limitation of an at‐risk seabird?
Timothy Knudson, James R. Lovvorn, M. James Lawonn, Robin Corcoran, Dan Roby, John F. Piatt, William Pyle
2020, Ecosphere (11)
Most seabird species nest colonially on cliffs or islands with limited terrestrial predation, so that oceanic effects on the quality or quantity of prey fed to chicks more often determine nest success. However, when predator access increases, impacts can be dramatic, especially when exposure to predators is extended due to...
High site fidelity does not equate to population genetic structure for common goldeneye and Barrow's goldeneye in North America
Joshua I. Brown, Philip Lavretsky, Robert E. Wilson, Christy Haughey, W. Sean Boyd, Daniel Esler, Sandra L. Talbot, Sarah A. Sonsthagen
2020, Journal of Avian Biology (51)
Delineation of population structure provides valuable information for conservation and management of species, as levels of demographic and genetic connectivity not only affect population dynamics but also have important implications for adaptability and resiliency of populations and species. Here, we measure population genetic structure and connectivity across the ranges of...
Lessons learned from the first worldwide accessible e-learning in Landscape Ecology
Kienast Felix, Gosteli Selina, Thomas C. Edwards Jr., Martius Gregor
2020, Landscape Online (83) 1-14
Massive open online courses (MOOCs) are distance learning tools for individualized learning. They allow students to learn at their own pace in a virtual classroom. We describe success and pitfalls of the MOOC Landscape Ecology, designed as an undergraduate University course taught by an international consortium of Professors covering theory...
