Geologic map of the Bonanza caldera area, northeastern San Juan Mountains, Colorado
Peter W. Lipman
2020, Scientific Investigations Map 3394
The San Juan Mountains in southwestern Colorado have long been known as a site of exceptionally voluminous mid-Tertiary volcanism, including at least 22 major ignimbrite sheets (each 150–5,000 km³) and associated caldera structures active at 34–23 Ma. Recent volcanologic and petrologic studies in the San Juan region have focused mainly...
Development of microsatellite markers for three at risk tiger beetles Cicindela dorsalis dorsalis, C. d. media, and C. puritana
Aaron Aunins, Michael S. Eackles, David C. Kazyak, Michael Drummond, Tim L. King
2020, BMC Research Notes (13)
ObjectiveTiger beetles inhabiting sandy beaches and cliffs along the east coast of the United States are facing increasing habitat loss due to erosion, urbanization, and sea level rise. The northeastern beach tiger beetle Cicindela dorsalis dorsalis and Puritan tiger beetle Cicindela puritana are both listed as threatened under the Endangered Species Act of...
Li and Ca enrichment in the Bristol Dry Lake brine compared to brines from Cadiz and Danby Dry Lakes, Barstow-Bristol Trough, California, USA
Michael R. Rosen, Lisa L. Stillings, Tyler Kane, Kate M. Campbell, Matthew Vitale, Ray Spanjers
2020, Minerals (10)
Relatively few discharging playas in western United States extensional basins have high concentrations of lithium (Li) and calcium (Ca) in the basin-center brines. However, the source of both these ions is not well understood, and it is not clear why basins in close proximity within the same...
Egg and larval collection methods affect spawning adult numbers inferred by pedigree analysis
Robert D. Hunter, Edward F. Roseman, Nick M. Sard, Daniel B. Hayes, Travis O. Brenden, Robin L. DeBruyne, Kim T. Scribner
2020, North American Journal of Fisheries Management (40) 307-319
Analytical methods that incorporate genetic data are increasingly used in monitoring and assessment programs for important rate functions of fish populations (e.g., recruitment). Because gear types vary in efficiencies and effective sampling areas, results from genetic‐based assessments likely differ depending on the sampling gear used to collect genotyped individuals; consequently,...
Evaluating dewatering approaches to protect larval Pacific lamprey
Theresa L. Liedtke, Lisa K. Weiland, Joseph J. Skalicky, Ann E. Gray
2020, Open-File Report 2020-1026
Executive SummaryLarval Pacific lamprey live for several years burrowed in nearshore sediments where they filter feed on detritus and organic matter. Dewatering of larval habitat can occur as a result of flow-management practices, construction projects, or seasonal closures of irrigation diversions. Effective management of dewatering events requires guidance on approaches...
Characterization of feed coals and coal combustion byproducts from the Wyodak-Anderson coal zone, Powder River Basin, Wyoming
Michael E. Brownfield
2020, Mountain Geologist (57) 199-240
The U.S. Geological Survey (USGS) determined the physical and chemical properties of more than 260 feed coal and coal combustion byproducts from two coal-fired power plants. These plants utilized a low-sulfur (0.23-0.47 wt. % S) and low ash (4.9-6.3 wt. % ash) subbituminous coal from the Wyodak-Anderson coal zone...
Economic valuation of health benefits from using geologic data to communicate radon risk potential
Scott J. Chiavacci, Carl D. Shapiro, Emily Pindilli, Clyde F. Casey, Mary Kay Rayens, Amanda T. Wiggins, William M. Andrews Jr., Ellen J. Hahn
2020, Environmental Health (19)
Background: Radon exposure is the second leading cause of lung cancer worldwide and represents a major health concern within and outside the United States. Mitigating exposure to radon is especially critical in places with high rates of tobacco smoking (e.g., Kentucky, USA), as radon-induced lung cancer is markedly greater among...
Electrofishing encounter probability, survival, and dispersal of stocked age-0 Muskellunge in Wisconsin lakes
Daniel J. Dembkowski, Janice A. Kerns, Emma G. Easterly, Daniel A. Isermann
2020, North American Journal of Fisheries Management (40) 383-393
Boat electrofishing is often used to sample age-0 Muskellunge Esox masquinongy for indexing recruitment or evaluating stocking success. However, electrofishing samples typically result in low CPUE, prompting concerns regarding whether catch rates reflect actual abundance or whether boat electrofishing is generally ineffective for capturing age-0 Muskellunge (i.e., if fish are not being...
40Ar/39Ar and U-Pb SIMS zircon ages of Ediacaran dikes from the Arabian-Nubian Shield of south Jordan
Hind Ghanem, Ryan J. McAleer, Ghaleb H. Jarrar, Mu’ayyad Al Hseinat, Martin Whitehouse
2020, Precambrian Research (434)
A spectacular feature of the Arabian-Nubian Shield (ANS) is the abundance of well-exposed and extensive Neoproterozoic dike swarms of multiple generations. These dikes are generally categorized into metamorphosed and unmetamorphosed post-orogenic dike swarms. The unmetamorphosed dikes in the northern ANS can be grouped into an old and young generations. We...
Altered climate leads to positive density‐dependent feedbacks in a tropical wet forest
Armando Barreto-Muñoz, Aura M. Alonso-Rodriguez, Laura Aldrich-Wolfe, Molly A. Cavaleri, Sasha C. Reed, Tana E Wood
2020, Global Change Biology (26) 3417-3428
Climate change is predicted to result in warmer and drier Neotropical forests relative to current conditions. Negative density‐dependent feedbacks, mediated by natural enemies, are key to maintaining the high diversity of tree species found in the tropics, yet we have little understanding of how projected changes...
Thermal diversity of salmon streams in the Matanuska-Susitna Basin, Alaska
Rebecca Shaftel, Sue Mauger, Jeffrey A. Falke, Daniel Rinella, Jeff Davis, Leslie Jones
2020, JAWRA (56) 630-646
We present the first description of summer stream thermal regimes in Alaska using metrics that represent the magnitude, variability, frequency, duration, and timing of temperature events related to salmon life histories. We used cluster analysis to characterize thermal regimes present in the Matanuska-Susitna (Mat-Su) Basin based...
Genetic family reconstruction characterizes Lake Sturgeon use of newly constructed spawning habitat and larval dispersal
Robert D. Hunter, Edward F. Roseman, Nick M. Sard, Robin L. DeBruyne, Jinliang Wang, Kim T. Scribner
2020, Transactions of the American Fisheries Society (149) 266-283
Since 2004, seven spawning reefs have been constructed in the St. Clair–Detroit River system to remediate lost spawning habitat and increase recruitment of Lake Sturgeon Acipenser fulvescens . Assessment of management actions by collecting and enumerating eggs and larvae provided evidence of spawning Lake Sturgeon and survival of...
Gametogenesis and assessment of nonlethal tools to assign sex and reproductive condition in Burbot
Lauren M. McGarvey, Leif J. Halvorson, Jason E. Ilgen, Christopher S. Guy, Jason G. McLellan, Molly A. H. Webb
2020, Transactions of the American Fisheries Society (149) 225-240
Nonlethal tools (plasma sex steroid concentrations and ultrasound) for assigning sex and reproductive condition in Burbot Lota lota from Lake Roosevelt, Washington, were assessed. Gonadal tissue, blood plasma, and gonadal sonograms were collected monthly from November 2016 to March 2018. Gametogenesis was described by gonadal histology during an...
The role of sand lances (Ammodytes sp.) in the Northwest Atlantic Ecosystem: A synthesis of current knowledge with implications for conservation and management
Michelle D. Staudinger, Holly Goyert, Justin Suca, Kaycee Coleman, Linda Welch, Joel Llopiz, Dave Wiley, Irit Altman, Andew Applegate, Peter Auster, Hannes Baumann, Julia Beaty, Deirdre Boelke, Les Kaufman, Pam Loring, Jerry Moxley, Suzanne Paton, Kevin Powers, David Richardson, Jooke Robbins, Jeff Runge, Brian Smith, Caleb Spiegel, Halley Steinmetz
2020, Fish and Fisheries (21) 522-556
The American sand lance (Ammodytes americanus, Ammodytidae) and the Northern sand lance (A. dubius, Ammodytidae) are small forage fishes that play an important functional role in the Northwest Atlantic Ocean (NWA). The NWA is a highly dynamic ecosystem currently facing increased risks from climate change, fishing and energy development. We...
Climate explorer: Improved access to local climate projections
Fredric Lipschultz, David Herring, Andrea J. Ray, Jay R. Alder, LuAnn Dahlman, Arthur DeGaetano, James F. Fox, Edward Gardiner, Jamie Herring, Jeff Hicks, Forrest Melton, Philip E. Morefield, William Sweet
2020, Article
The goal of the U.S. Climate Resilience Toolkit’s (CRT) Climate Explorer (CE) is to provide information at appropriate spatial and temporal scales to help practitioners gain insights into the risks posed by climate change. Ultimately, these insights can lead to groups of local stakeholders taking action to build their resilience...
Implementation of a surface water extent model in Cambodia using cloud-based remote sensing
Christopher E. Soulard, Jessica J. Walker, Roy E. Petrakis
2020, Remote Sensing (12)
Mapping surface water over time provides the spatially explicit information essential for hydroclimatic research focused on droughts and flooding. Hazard risk assessments and water management planning also rely on accurate, long-term measurements describing hydrologic fluctuations. Stream gages are a common measurement tool used to better understand flow and inundation dynamics,...
Quantifying interregional flows of multiple ecosystem services – A case study for Germany
Janina Kleeman, Matthias Schroter, Kenneth J. Bagstad, Christian Kuhlicke, Thomas Kastner, Dor Fridman, Catharina J. E. Schulp, Sarah Wolff, Javier Martinez-Lopez, Thomas Koellner, Sebastian Arnhold, Berta Martin-Lopez, Alexandra Marques, Laura Lopez-Hoffman, Jianguo Liu, Meidad Kissinger, Carlos Guerra, Aletta Bonn
2020, Global Environmental Change (61)
Despite a growing number of national-scale ecosystem service (ES) assessments, few studies consider the impacts of ES use and consumption beyond national or regional boundaries. Interregional ES flows – ecosystem services “imported” from and “exported” to other countries – are rarely analyzed and their importance for global sustainability is little...
Reconnaissance of surface water estrogenicity and the prevalence of intersex in smallmouth bass (Micropterus dolomieu) inhabiting New Jersey
Luke Iwanowicz, Kelly L. Smalling, Vicki S. Blazer, Ryan P. Braham, Lakyn R. Sanders, Anna Boetsma, Nick Procopio, Sandra Goodrow, Gary Buchanan, Daniel Millemann, Bruce Ruppel, John Vile, Brian Henning, John Abatemarco
2020, International Journal of Environmental Research and Public Health (17)
The observation of testicular oocytes in male fishes has been utilized as a biomarker of estrogenic endocrine disruption. A reconnaissance project led in the Northeastern United States (US) during the period of 2008–2010 identified a high prevalence of intersex smallmouth bass on or near US Fish & Wildlife Service National...
A critical review on the potential impacts of neonicotinoid insecticide use: Current knowledge of environmental fate, toxicity, and implications for human health
Hans-Joachim Lehmler, Dana W. Kolpin, Michelle L. Hladik, John D. Vargo, Keith E. Schilling, Gregory H. LeFevre, Tonya L. Peeples, Matthew C. Poch, Lauren E. LaDuca, David M. Cwiertny, R. William Field
2020, Environmental Science: Processes and Impacts (22) 1315-1346
Neonicotinoid insecticides are widely used in both urban and agricultural settings around the world. Historically, neonicotinoid insecticides have been viewed as ideal replacements for more toxic compounds, like organophosphates, due in part to their perceived limited potential to affect the environment and human health. This critical review investigates the environmental...
Contaminant subsidies to riparian food webs in Appalachian streams impacted by mountaintop removal coal mining
Laura C. Naslund, Jacqueline R. Gerson, Alexander C. Brooks, David Walters, Emily S. Bernhardt
2020, Environmental Science & Technology (54) 3951-3959
Selenium is highly elevated in Appalachian streams and stream organisms that receive alkaline mine drainage from mountaintop removal coal mining compared to unimpacted streams in the region. Adult aquatic insects can be important vectors of waterborne contaminants to riparian food webs, yet pathways of Se transport and exposure of riparian...
Geologic map of Petroglyph National Monument and vicinity, Bernalillo County, New Mexico
Ren A. Thompson, Christine F. Chan, Amy K. Gilmer, Ralph R. Shroba
2020, Scientific Investigations Map 3447
This geologic map depicts and briefly describes geologic units underlying Petroglyph National Monument and immediately adjacent areas in Bernalillo County, New Mexico. The Monument is underlain dominantly by Quaternary basalts of the Albuquerque Volcanoes volcanic field, a series of basin-filling volcanic flows and associated vents from a monogenetic volcanic highland...
Status and trends of pelagic and benthic prey fish populations in Lake Michigan, 2019
David Bunnell, David Warner, Charles P. Madenjian, Ben Turschak, Patricia Dieter, Tim Desorcie
2020, Report
Lakewide acoustic (AT) and bottom trawl (BT) surveys are conducted annually to generate indices of pelagic and benthic prey fish densities in Lake Michigan. The BT survey has been conducted each fall since 1973 using 12-m trawls at depths ranging from 9 to 110 m and include 70 fixed locations...
A within-season approach for detecting early crop stage of corn and soybean using high temporal and spatial resolution imagery
Feng Gao, Martha Anderson, Craig S. T. Daughtry, Arnon Karnieli, W. Dean Hively, William P. Kustas
2020, Remote Sensing of Environment (242)
Crop emergence is a critical stage for crop development and crop growth modeling. Mapping crop emergence using remote sensing data is challenging. Previous remote sensing phenology algorithms showed that crop stages could be detected around the V3-V4 (3 to 4 established leaves) vegetative stage. Traditional approaches have a strong assumption...
Mechanics of near-field deformation during co- and post-seismic shallow fault slip
Johanna Nevitt, Benjamin A. Brooks, Rufus D. Catchings, Mark Goldman, Todd Ericksen, Craig L. Glennie
2020, Scientific Reports (10)
Poor knowledge of how faults slip and distribute deformation in the shallow crust hinders efforts to mitigate hazards where faults increasingly intersect with the expanding global population at Earth’s surface. Here we analyze two study sites along the 2014 M 6.0 South Napa, California, earthquake rupture, each dominated by either...
Detecting commonality in multidimensional fish movement histories using sequence analysis
Michael R. Lowe, Christopher Holbrook, Darryl W. Hondorp
2020, Animal Biotelemetry (8)
BackgroundAcoustic telemetry, for tracking fish movement histories, is multidimensional capturing both spatial and temporal domains. Oftentimes, analyses of such data are limited to a single domain, one domain nested within the other, or ad hoc approaches that simultaneously consider both domains. Sequence analysis, on the other hand, offers...
