Geochemical advances in Arctic Alaska oil typing - North Slope oil correlation and charge history
Palma J. Botterell, David W. Houseknecht, Paul G. Lillis, Silvana M. Barbanti, Jeremy E. Dahl, J. Michael Moldowan
2021, Marine and Petroleum Geology (127)
The Arctic Alaska petroleum province is geologically and geochemically complex. Mixed hydrocarbon charge from multiple source rocks and/or levels of thermal maturity is common within an individual oil pool. Biomarker and chemometric statistical analyses were used to correlate twenty-nine oils to five oil families derived from: (1) Triassic Shublik Formation (calcareous...
Foreword
Frank T. van Manen
2021, Book chapter, Sloth Bear-the Barefoot Bear of Sri Lanka
No abstract available....
Airborne dust plumes lofted by dislodged ice blocks at Russell Crater, Mars
Cynthia L. Dinwiddie, Timothy N. Titus
2021, Geophysical Research Letters (48)
Linear dune gullies on poleward-facing Martian slopes are enigmatic. Formation by CO2-ice block or snow cornice falls has been proposed based on optical imagery of bright, high-albedo features inside gully channels. Because these features often resemble patchy frost residue rather than three-dimensional blocks, more evidence is needed to support the...
Fish Rhabdoviruses (Rhabdoviridae)
Gael Kurath, David B. Stone
2021, Book chapter, Encyclopedia of Virology 4th Edition
The family Rhabdoviridae currently has 18 genera accepted by the International Committee for Virus Taxonomy (ICTV), and three of those genera contain fish rhabdoviruses. In the genera Novirhabdovirus, Sprivivirus, and Perhabdovirus all viruses infect fish hosts, and there are no fish viruses in any of the other 15 rhabdovirus genera....
Broadening the ecology of fear: Non-lethal effects arise from diverse responses to predation and parasitism
D R Daversa, Ryan F. Hechinger, E Madin, A Fenton, A I Dell, E G Ritchie, Timothy J. Rohrbacher, V H W Rudolf, Kevin D. Lafferty
2021, Proceedings of the Royal Society B (288)
Research on the ‘ecology of fear’ posits that defensive prey responses to avoid predation can cause non-lethal effects across ecological scales. Parasites also elicit defensive responses in hosts with associated non-lethal effects, which raises the longstanding, yet unresolved question of how non-lethal effects of parasites compare with...
Forecasting induced earthquake hazard using a hydromechanical earthquake nucleation model
Justin Rubinstein, Andrew J. Barbour, Jack H Norbeck
2021, Seismological Research Letters (92) 2206-2220
In response to the dramatic increase in earthquake rates in the central United States, the U.S Geological Survey began releasing 1 yr earthquake hazard models for induced earthquakes in 2016. Although these models have been shown to accurately forecast earthquake hazard, they rely purely on earthquake...
Airborne dust plumes lofted by dislodged ice blocks at Russell crater, Mars
Cynthia Dinwiddie, Timothy N. Titus
2021, Geophysical Research Letters (48)
Linear dune gullies on poleward‐facing Martian slopes are enigmatic. Formation by CO2‐ice block or snow cornice falls has been proposed based on optical imagery of bright, high‐albedo features inside gully channels. Because these features often resemble patchy frost residue rather than three‐dimensional blocks, more evidence is needed...
Co-transport of biogenic nano-hydroxyapatite and Pb(II) in saturated sand columns: Controlling factors and stochastic modeling
Dongbao Zhou, Xuan Han, Yong Zhang, Wei Wei, Christopher Green, HongGuang Sun, Chunmiao Zheng
2021, Chemosphere (275)
Biogenic nano-hydroxyapatite (bio-nHAP) has recently gained great interest in many domains, especially in the remediation of heavy metal-contaminated soil, due to its high reactivity, low cost, and eco-friendly nature. The co-transport and reaction of bio-nHAP with Pb(II) in saturated porous media, however, are not...
Long-term carbon sinks in marsh soils of coastal Louisiana are at risk to wetland loss
Melissa M. Baustian, Camille Stagg, Carey L. Perry, Leland C. Moss, Tim J. B. Carruthers
2021, Journal of Geophysical Research: Biogeosciences (126)
Coastal marshes are essential habitats for soil carbon accumulation and burial, which can influence the global carbon budget. Coastal Louisiana has extensive marsh habitats (fresh, intermediate, brackish, and saline) where soil cores were collected to a depth of 100 cm at 24 sites to assess long-term carbon...
Evaluation of six methods for correcting bias in estimates from ensemble tree machine learning regression model
Kenneth Belitz, Paul Stackelberg
2021, Environmental Modeling and Software (139)
Ensemble-tree machine learning (ML) regression models can be prone to systematic bias: small values are overestimated and large values are underestimated. Additional bias can be introduced if the dependent variable is a transform of the original data. Six methods were evaluated for their ability to correct systematic and introduced bias....
Long-term ecosystem and biogeochemical research in Loch Vale watershed, Rocky Mountain National Park, Colorado
Jill S. Baron, David W. Clow, Isabella A. Oleksy, Timothy Weinmann, Caitlin Charlton, Amanda Jayo
2021, Hydrological Processes (35)
Loch Vale watershed was instrumented in 1983 with initial support from the National Acid Precipitation Assessment Program to ask whether ecosystems of Rocky Mountain National Park (RMNP) were affected by acidic atmospheric deposition. Research and monitoring activities were expanded in 1991 by the U.S. Geological Survey...
No ring fracture in Mono Basin, California
Edward Hildreth, Judith Fierstein, Juliet Ryan-Davis
2021, Geological Society of America Bulletin (133) 2210-2225
In Mono Basin, California, USA, a near-circular ring fracture 12 km in diameter was proposed by R.W. Kistler in 1966 to have originated as the protoclastic margin of the Cretaceous Aeolian Buttes pluton, to have been reactivated in the middle Pleistocene, and to have influenced the arcuate trend of the...
Hydrographic and benthic mapping—St. Croix National Scenic Riverway—Osceola landing
Jenny L. Hanson, Jayme Stone
2021, Open-File Report 2020-1149
High-resolution topographic and bathymetric mapping can assist in the analysis of river habitat. The National Park Service has been planning to relocate a boat ramp along the St. Croix River in Minnesota, across the river from the town of Osceola, Wisconsin, to improve visitor safety, improve operations for commercial use,...
Rangeland fractional components across the western United States from 1985 to 2018
Matthew B. Rigge, Collin Homer, Hua Shi, Debbie Meyer, Brett Bunde, Brian J. Granneman, Kory Postma, Patrick Danielson, Adam Case, George Z. Xian
2021, Remote Sensing (13)
Monitoring temporal dynamics of rangelands to detect and understand change in vegetation cover and composition provides a wealth of information to improve management and sustainability. Remote sensing allows the evaluation of both abrupt and gradual rangeland change at unprecedented spatial and temporal extents. Here, we describe the production of the...
Decadal-scale hotspot methane ebullition within lakes following abrupt permafrost thaw
K.W. Anthony, P. Lindgren, P. Hanke, M. Engram, P. Anthony, R. Daanen, A. Bondurant, A.K. Liljedahl, J. Lenz, G. Grosse, B.M. Jones, L. S. Brosius, Stephanie R. James, Burke J. Minsley, Neal Pastick, J. Munk, J. P. Chanton, C.E. Miller, F.J. Meyer
2021, Environmental Research Letters (16)
Thermokarst lakes accelerate deep permafrost thaw and the mobilization of previously frozen soil organic carbon. This leads to microbial decomposition and large releases of carbon dioxide (CO2) and methane (CH4) that enhance climate warming. However, the time scale of permafrost-carbon emissions following thaw is not well known...
Machine learning predicted redox conditions in the glacial aquifer system, northern continental United States
Melinda L. Erickson, Sarah M. Elliott, Craig J. Brown, Paul Stackelberg, Katherine Marie Ransom, James E. Reddy
2021, Water Resources Research (57)
Groundwater supplies 50% of drinking water worldwide and 30% in the United States. Geogenic and anthropogenic contaminants can, however, compromise water quality, thus limiting groundwater availability. Reduction/oxidation (redox) processes and redox conditions affect groundwater quality by influencing the mobility and transport of common geogenic and anthropogenic contaminants....
Interrupted incubation: How dabbling ducks respond when flushed from the nest
Rebecca Croston, C. Alex Hartman, Mark P. Herzog, Sarah H. Peterson, Jeffrey Kohl, Cory T. Overton, Cliff L. Feldheim, Michael L. Casazza, Josh T. Ackerman
2021, Ecology and Evolution (11) 2862-2872
Nesting birds must provide a thermal environment sufficient for egg development while also meeting self‐maintenance needs. Many birds, particularly those with uniparental incubation, achieve this balance through periodic incubation recesses, during which foraging and other self‐maintenance activities can occur. However, incubating birds may experience disturbances such...
Atmospheric nitrogen deposition in the Chesapeake Bay watershed: A history of change
Douglas A. Burns, Gopal Bhatt, Lewis C. Linker, Jesse Bash, Paul Capel, Gary W. Shenk
2021, Atmospheric Environment (251)
The Chesapeake Bay watershed has been the focus of pioneering studies of the role of atmospheric nitrogen (N) deposition as a nutrient source and driver of estuarine trophic status. Here, we review the history and evolution of scientific investigations of the role of atmospheric N deposition, examine trends from wet...
Temporal influences on selenium partitioning, trophic transfer, and exposure in a major U.S. river
Jessica E Brandt, James Roberts, Craig A. Stricker, Holly Rogers, Patricia Nease, Travis S. Schmidt
2021, Environmental Science and Technology (55) 3645-3656
Hydrologic and irrigation regimes mediate the timing of selenium (Se) mobilization to rivers, but the extent to which patterns in Se uptake and trophic transfer through recipient food webs reflect the temporal variation in Se delivery is unknown. We investigated Se mobilization, partitioning, and trophic transfer along approximately 60 river...
Redefining the age of the lower Colorado River, southwestern United States
Ryan S. Crow, J. Schwing, K. E. Karlstrom, M. Heizler, P. A. Pearthree, P. K. House, S. Dulin, S. U. Janecke, Mark E. Stelten, L. J. Crossey
2021, Geology (49) 635-640
Sanidine dating and magnetostratigraphy constrain the timing of integration of the lower Colorado River (southwestern United States and northern Mexico) with the evolving Gulf of California. The Colorado River arrived at Cottonwood Valley (Nevada and Arizona) after 5.24 Ma (during or after the Thvera subchron). The river reached the proto–Gulf...
Evaluating fish rescue as a drought adaptation strategy using a life cycle modeling approach for imperiled coho salmon
Brittany A Beebe, Kale T Bentley, Thomas W. Buehrens, Russell Perry, Jonathan B. Armstrong
2021, North American Journal of Fisheries Management (41) 3-18
Projected intensification of drought as a result of climate change may reduce the capacity of streams to rear fish, exacerbating the challenge of recovering salmonid populations listed under the Endangered Species Act. Without management intervention, some stocks will likely go extinct as stream drying and fragmentation reduce juvenile survival to...
Discovery of a large subsoil nitrate reservoir in an arroyo floodplain and associated aquifer contamination
Benjamin Shawn Linhoff, John Joseph Lunzer
2021, Geology (49) 667-671
In an area of elevated nitrate (NO3) groundwater concentrations in the northern Chihuahuan Desert in central New Mexico (United States), a large reservoir of nitrate was found in the subsoil of an arroyo floodplain. Nitrate inventories in the floodplain subsoils ranged from 10,000 to 38,000...
Estimating blue carbon sequestration under coastal management scenarios
Monica Mei Jeen Moritsch, Mary Alida Young, Paul Carnell, Peter I Macreadie, Catherine E. Lovelock, Emily Nicholson, Peter T. Raimondi, Lisa M. Wedding, Daniel Ierodiaconou
2021, Science of the Total Environment (777)
Restoring and protecting “blue carbon” ecosystems - mangrove forests, tidal marshes, and seagrass meadows - are actions considered for increasing global carbon sequestration. To improve understanding of which management actions produce the greatest gains in sequestration, we used a spatially explicit model to compare carbon sequestration and its economic...
Using decision science for monitoring threatened western snowy plovers to inform recovery
Bruce G. Marcot, James E. Lyons, Daniel C Elbert, Laura Todd
2021, Animals (11)
Western Snowy Plovers (Charadrius nivosus nivosus) are federally listed under the US Endangered Species Act as Threatened. They occur along the US Pacific coastline and are threatened by habitat loss and destruction and excessive levels of predation and human disturbance. Populations have been monitored since the...
Extreme Quaternary plate boundary exhumation and strike slip localized along the southern Fairweather fault, Alaska, USA
Richard O. Lease, Peter J. Haeussler, Robert C. Witter, Daniel F. Stockli, Adrian Bender, Harvey Kelsey, Paul O’Sullivan
2021, Geology (49) 602-606
The Fairweather fault (southeastern Alaska, USA) is Earth’s fastest-slipping intracontinental strike-slip fault, but its long-term role in localizing Yakutat–(Pacific–)North America plate motion is poorly constrained. This plate boundary fault transitions northward from pure strike slip to transpression where it comes onshore and undergoes a <25°, 30-km-long restraining double bend. To...
