Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

183835 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 498, results 12426 - 12450

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Opinion: A preferred approach for dealing with reproducibility and replicability in science
James D. Nichols, Madan K. Oli, William L. Kendall, G. Scott Boomer
2021, Proceedings of the National Academy of Sciences of the United States of America (118) 1-5
Science impacts our daily lives and guides national and international policies (1). Thus, results of scientific studies are of paramount importance; yet, there are concerns that many studies are not reproducible or replicable (2). To address these concerns, the National Research Council conducted a Consensus Study [NASEM 2019...
Shade, light, and stream temperature responses to riparian thinning in second-growth redwood forests of northern California
David Roon, Jason B. Dunham, Jeremiah D Groom
2021, PLoS ONE (16)
Resource managers in the Pacific Northwest (USA) actively thin second-growth forests to accelerate the development of late-successional conditions and seek to expand these restoration thinning treatments into riparian zones. Riparian forest thinning, however, may impact stream temperatures–a key water quality parameter often regulated to protect stream habitat and aquatic organisms....
Modeling how to achieve localized areas of reduced white-tailed deer density
Amanda N. Van Buskirk, Christopher S. Rosenberry, Bret D. Wallingford, Emily Just Domoto, Marc E. McDill, Patrick Drohan, Duane R. Diefenbach
2021, Ecological Modelling (442)
Localized management of white-tailed deer (Odocoileus virginianus) involves the removal of matriarchal family units with the intent to create areas of reduced deer density. However, application of this approach has not always been successful, possibly because of female dispersal and high deer densities. We developed a spatially explicit, agent-based model...
The Mars 2020 Perseverance rover mast camera zoom (Mastcam-Z) multispectral, stereoscopic imaging investigation
J. F. Bell III, J. N. Maki, G. L. Mehall, M. A. Ravine, M. A. Caplinger, Z. J. Bailey, S. Brylow, J. A. Schaffner, K. M. Kinch, M. B. Madsen, A. Winhold, A. G. Hayes, P. Corlies, C. Tate, M. Barrington, E. Cisneros, E. Jensen, Katy L. Parise, Kelon Crawford, C. Rojas, L. Mehall, J. Joseph, J. B. Proton, N. Cluff, R. G. Deen, B. Betts, Edward A. Cloutis, A. J. Coates, Anthony Colaprete, K. S. Edgett, B. L. Ehlmann, Sarah A. Fagents, J. P. Grotzinger, C. Hardgrove, Kenneth E. Herkenhoff, Briony H. N. Horgan, R. Jaumann, J. R. Johnson, M. T. Lemmon, G. Paar, M Caballo-Perucha, S. Gupta, C Traxler, F. Preusker, M. S. Rice, M. S. Robinson, N. Schmitz, R. Sullivan, M. J. Wolff
2021, Space Science Reviews (217)
Mastcam-Z is a multispectral, stereoscopic imaging investigation on the Mars 2020 mission’s Perseverance rover. Mastcam-Z consists of a pair of focusable, 4:1 zoomable cameras that provide broadband red/green/blue and narrowband 400-1000 nm color imaging with fields of view from 25.6° × 19.2° (26 mm focal length at 283 μrad/pixel) to 6.2° × 4.6° (110 mm focal length at 67.4 μrad/pixel). The...
Geologic assessment of undiscovered oil and gas resources in the Cherokee Platform area of Kansas, Oklahoma, and Missouri
Ronald M. Drake II, Joseph R. Hatch
2021, Scientific Investigations Report 2020-5110
In 2015, the U.S. Geological Survey completed a geology-based assessment to estimate the volumes of undiscovered, technically recoverable petroleum resources in the Cherokee Platform Province area of southeastern Kansas, northeastern Oklahoma, and southwestern Missouri. The U.S. Geological Survey identified four stratigraphic intervals that contain petroleum source rocks: (1) thin shales...
Does taxonomic and numerical resolution affect the assessment of invertebrate community structure in New World freshwater wetlands?
Mateus M. Pires, Marta G. Grech, Cristina Stenert, Leonardo Maltchik, Luis B. Epele, Kyle McLean, Jamie M. Kneitel, Douglas A. Bell, Hamish S. Greig, Chase R. Gagne, Darold P. Batzer
2021, Ecological Indicators (125)
The efficiency of biodiversity assessments and biomonitoring studies is commonly challenged by limitations in taxonomic identification and quantification approaches. In this study, we assessed the effects of different taxonomic and numerical resolutions on a range of community structure metrics in invertebrate compositional data sets from six regions distributed across North...
Uncovering process domains in large rivers: Patterns and potential drivers of benthic substrate heterogeneity in two North American riverscapes
E.A Scholl, W. F. Cross, C. V. Baxter, Christopher S. Guy
2021, Geomorphology (375) 1-15
Identifying and understanding functional process domains (sensu Montgomery, 1999) in rivers is paramount for linking the physical habitat template to ecosystem structure and function. To date, efforts to do this have been rare, especially in large rivers, as they require appropriate tools for quantifying habitat heterogeneity with fine-scale resolution across...
Evaluating lethal toxicant doses for the largest individuals of an invasive vertebrate predator with indeterminate growth
Shane R. Siers, Scott Michael Goetz, Rachel M. Volsteadt, Melia G. Nafus
2021, Management of Biological Invasions (12) 476-494
The brown treesnake (Boiga irregularis) was accidentally introduced to Guam and caused severe ecological and economic damages. Acetaminophen is an effective, low-risk oral toxicant for invasive brown treesnakes, and an automated aerial delivery system (ADS) has been developed for landscape-scale toxic bait distribution. A fixed dose of 80 mg of...
Improving the ability of a BACI design to detect impacts within a kelp‐forest community
Andrew Rassweiler, Daniel K Okamoto, Daniel C. Reed, David J Kushner, Donna M Schroeder, Kevin D. Lafferty
2021, Ecological Applications (31)
Distinguishing between human impacts and natural variation in abundance remains difficult because most species exhibit complex patterns of variation in space and time. When ecological monitoring data are available, a before‐after‐control‐impact (BACI) analysis can control natural spatial and temporal variation to better identify an impact and estimate its magnitude. However,...
The role of hydrates, competing chemical constituents, and surface composition on CLNO2 formation
Haley M. Royer, Dhruv Mitroo, Sarah M. Hayes, Savannah Haas, Kerri A Pratt, Patricia Blackwelder, Thomas E. Gill, Cassandra J. Gaston
2021, Environmental Science Technology (55) 2869-2877
Atomic chlorine (Cl•) affects air quality and atmospheric oxidizing capacity. Nitryl chloride (ClNO2) – a common Cl• source–forms when chloride-containing aerosols react with dinitrogen pentoxide (N2O5). A recent study showed that saline lakebed (playa) dust is an inland source of particulate chloride (Cl–)...
SARS-CoV-2 exposure in escaped mink, Utah, USA
Susan A. Shriner, Jeremeny E. Ellis, J. Jeffrey Root, Annette Roug, Scott R. Stopak, Gerald W. Wiscomb, Jared R. Zierenberg, Hon S. Ip, Mia K. Torchetti, Thomas J. DeLiberto
2021, Emerging Infectious Diseases (27) 988-990
In August 2020, outbreaks of coronavirus disease were confirmed on mink farms in Utah, USA. We surveyed mammals captured on and around farms for evidence of infection or exposure. Free-ranging mink, presumed domestic escapees, exhibited high antibody titers, suggesting a potential severe acute respiratory syndrome coronavirus...
Cloud-native repositories for big scientific data
Ryan Abernathey, Tom Augspurger, Anderson Banihirwe, Charles C. Blackmon-Luca, Timothy Crone, Chelle Gentemann, Joseph Hamman, Naomi Henderson, Chiara Lepore, Theo McCaie, Niall Robinson, Richard P. Signell
2021, Computing in Science and Engineering (23) 26-35
Scientific data have traditionally been distributed via downloads from data server to local computer. This way of working suffers from limitations as scientific datasets grow toward the petabyte scale. A “cloud-native data repository,” as defined in this article, offers several advantages over traditional data repositories—performance, reliability,...
Estimating the survival of unobservable life stages for a declining frog with a complex life-history
Jonathan P. Rose, Sarah Kupferberg, Clara A Wheeler, Patrick M. Kleeman, Brian J. Halstead
2021, Ecosphere (12)
Demographic models enhance understanding of drivers of population growth and inform conservation efforts to prevent population declines and extinction. For species with complex life histories, however, parameterizing demographic models is challenging because some life stages can be difficult to study directly. Integrated population models (IPMs) empower...
The interactive effects of stream temperature, stream size, and non-native species on Yellowstone cutthroat trout
Robert K. Al-Chokhachy, Michael Lien, Bradley B. Shepard, Brett High
2021, Canadian Journal of Fisheries and Aquatic Sciences (78) 1073-1083
Climate change and non-native species are considered two of the biggest threats to native salmonids in North America. We evaluated how non-native salmonids and stream temperature and discharge were associated with Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) distribution, abundance, and body size to gain a more complete understanding of the...
Evidence of preferential flow activation in the vadose zone via geophysical monitoring
Lorenzo De Carlo, Kimberlie Perkins, Maria Clementina Caputo
2021, Sensors (21)
Preferential pathways allow rapid and non-uniform water movement in the subsurface due to strong heterogeneity of texture, composition, and hydraulic properties. Understanding the importance of preferential pathways is crucial, because they have strong impact on flow and transport hydrodynamics in the unsaturated zone. Particularly, improving knowledge of...
The contribution of currents, sea-swell waves, and infragravity waves to suspended-sediment transport across a coral reef-lagoon system.
Andrew Pomeroy, Curt D. Storlazzi, Kurt J. Rosenberger, Ryan Lowe, Jeff Hansen, Mark L. Buckley
2021, JGR Oceans (126)
Coral reefs generate substantial volumes of carbonate sediment, which is redistributed throughout the reef‐lagoon system. However, there is little understanding of the specific processes that transport this sediment produced on the outer portions of coral reefs throughout a reef‐lagoon system. Furthermore, the separate contributions of currents, sea‐swell waves, and infragravity...
Historical data provide important context for understanding declines in Cutthroat Trout
Brittany J. Nordberg, Elizabeth G. Mandeville, Annika W. Walters, Jason C. Burckhardt, Catherine E. Wagner
2021, North American Journal of Fisheries Management (41) 809-819
We used historical stocking and population survey records of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri and other salmonids in the North Fork Shoshone River drainage, Wyoming to summarize fish stocking history and population trends. Based on 98 years of historical records, we found that despite extensive stocking of Yellowstone Cutthroat Trout and minimal...
Would you like to know more? The effect of personalized wildfire risk information and social comparisons on information-seeking behavior in the wildland–urban interface
James Meldrum, Hannah Brenkert-Smith, Patricia A. Champ, Jamie Gomez, Hilary Byerly, Lilia C. Falk, Christopher M. Barth
2021, Natural Hazards (106) 2139-2161
Private landowners are important actors in landscape-level wildfire risk management. Accordingly, wildfire programs and policy encourage wildland–urban interface homeowners to engage with local organizations to properly mitigate wildfire risk on their parcels. We investigate whether parcel-level wildfire risk assessment data, commonly used to inform community-level planning...
Months-long spike in aqueous Arsenic following domestic well installation and disinfection: Short- and long-term drinking water quality implications
Melinda L. Erickson, Elizabeth D. Swanner, Brady A. Ziegler, Jeffrey R. Havig
2021, Journal of Hazardous Materials (414)
Exposure to high concentration geogenic arsenic via groundwater is a worldwide health concern. Well installation introduces oxic drilling fluids and hypochlorite (a strong oxidant) for disinfection, thus inducing geochemical disequilibrium. Well installation causes changes in geochemistry lasting 12 + months, as illustrated in a recent study of 250 new...
Estimates of energy partitioning, evapotranspiration, and net ecosystem exchange of CO2 for an urban lawn and a tallgrass prairie in the Denver metropolitan area under contrasting conditions
Thomas Thienelt, Dean E. Anderson
2021, Urban Ecosystems (24) 1201-1220
Lawns as a landcover change substantially alter evapotranspiration, CO2, and energy exchanges and are of rising importance considering their spatial extent. We contrast eddy covariance (EC) flux measurements collected in the Denver, Colorado, USA metropolitan area in 2011 and 2012 over a lawn and a xeric...
Electrical conductivity of the lithosphere-asthenosphere system
Samer Naif, Kate Selway, Benjamin Scott Murphy, Gary D. Egbert, Anne Pommier
2021, Physics of the Earth and Planetary Interiors (313)
Electromagnetic geophysical methods image the electrical conductivity of the subsurface. Electrical conductivity is an intrinsic material property that is sensitive to temperature, composition, porosity, volatile and/or melt content, and other physical properties relevant to the solid Earth. Therefore, imaging the electrical structure of the crust and mantle yields valuable information on...
Heatwave-induced synchrony within forage fish portfolio disrupts energy flow to top pelagic predators
Mayumi L. Arimitsu, John F. Piatt, Scott Hatch, Robert M. Suryan, Sonia Batten, Mary Anne Bishop, Rob W. Campbell, Heather Coletti, Dan Cushing, Kristen Gorman, Russell R. Hopcroft, Kathy J. Kuletz, Caitlin Elizabeth Marsteller, Caitlin McKinstry, David McGowan, John Moran, W. Scott Pegau, Anne Schaefer, Sarah K. Schoen, Jan Straley, Vanessa R. von Biela
2021, Global Change Biology (27) 1859-1878
During the Pacific marine heatwave of 2014–2016, abundance and quality of several key forage fish species in the Gulf of Alaska were simultaneously reduced throughout the system. Capelin (Mallotus catervarius), sand lance (Ammodytes personatus), and herring (Clupea pallasii) populations were at historically low levels, and within this community abrupt declines...