Waif gopher tortoise survival and site fidelity following translocation
R.K. McKee, K.A. Buhlmann, Clinton T. Moore, J. Hepinstall-Cymerman, T.D. Tuberville
2021, Journal of Wildlife Management (85) 640-653
Gopher tortoises (Gopherus polyphemus) are among the most commonly translocated reptiles. Waif tortoises are animals frequently of unknown origin that have been displaced from the wild and often held in human possession for various reasons and durations. Although there are risks associated with any translocation, waif tortoises are generally excluded...
2021 Computational Infrastructure for Geodynamics Developers Workshop
Brad T. Aagaard, Jed Brown, Catherin Cooper, Rene Gassmoeller, Lorraine Hwang, Marc Spiegelman
2021, Conference Paper
The CIG Developers Workshop resulted in a number of recommendations that we think will help expand the CIG developer community, make software more accessible to new users, and increase developer productivity through use of common infrastructure and best practices for software development. This includes building a broad user base with...
U–Pb zircon eruption age of the Old Crow tephra and review of extant age constraints
Seth D. Burgess, Jorge A. Vazquez, Christopher F. Waythomas, Kristi L. Wallace
2021, Quaternary Geochronology (66)
Eruption of the Old Crow tephra deposited ~200 km3 of volcanic ash throughout Alaska and the northwestern Yukon (eastern Beringia), providing an isochronous marker across the region on a scale unique in the Pleistocene. The Old Crow tephra represents a critical temporal piercing point used...
The influence of land cover and storm magnitude on hydrologic flowpath activation and runoff generation in steep tropical catchments of central Panama
Andrew L. Birch, Robert Stallard, Sidney A. Bush, Holly R. Barnard
2021, Journal of Hydrology (596)
Despite abundant research documenting that land use/land cover (LULC) have substantial impacts on the hydrology of humid tropical systems, field-based evidence for the physical mechanisms behind these impacts are still lacking. In particular, our understanding of the hydrologic flowpaths that generate runoff in these...
Nitrogen and phosphorus sources and delivery from the Mississippi/Atchafalaya River Basin: An update using 2012 SPARROW models
Dale M. Robertson, David A. Saad
2021, Journal of the American Water Resources Association (57) 406-429
Nitrogen (N) and phosphorus (P) inputs throughout the Mississippi/Atchafalaya River Basin (MARB) have been linked to the Gulf of Mexico hypoxia and water‐quality problems throughout the MARB. To describe N and P loading throughout the MARB, SPAtially Referenced Regression On Watershed attributes (SPARROW) models were previously...
Analytical validation of two RT-qPCR tests and detection of spring viremia of carp virus (SVCV) in persistently infected koi Cyprinus carpio
Sharon C Clouthier, Tamara Schroeder, Emma K Bueren, Eric D. Anderson, Eveline Emmenegger
2021, Diseases of Aquatic Organisms (143) 169-188
Spring viremia of carp virus (SVCV) ia a carp sprivivirus and a member of the genus Sprivivirus within the family Rhabdoviridae. The virus is the etiological agent of spring viremia of carp, a disease of cyprinid species including koi Cyprinus carpio L. and notifiable to the World Organisation for Animal Health. The goal of this...
Subducting oceanic basement roughness impacts on upper plate tectonic structure and a backstop splay fault zone activated in the southern Kodiak aftershock region of the Mw 9.2, 1964 megathrust rupture, Alaska
Anne Krabbenhoeft, Roland E. von Huene, John J. Miller, Dirk Klaeschen
2021, Geosphere (17) 409-437
In 1964, the Alaska margin ruptured in a giant Mw 9.2 megathrust earthquake, the 2nd largest during worldwide instrumental recording. The coseismic slip and aftershock region offshore Kodiak Island was surveyed in 1977 – 1981 to understand the region’s tectonics. We re-processed multichannel seismic (MCS) field data using current standard...
Accommodating the role of site memory in dynamic species distribution models
Graziella Vittoria DiRenzo, David A. W. Miller, Blake R. Hossack, Brent H. Sigafus, Paige E. Howell, Erin L. Muths, Evan H. Campbell Grant
2021, Ecology (102)
First-order dynamic occupancy models (FODOMs) are a class of state-space model in which the true state (occurrence) is observed imperfectly. An important assumption of FODOMs is that site dynamics only depend on the current state and that variations in dynamic processes are adequately captured with covariates...
Elk migration influences the risk of disease spillover in the Greater Yellowstone Ecosystem
Nathaniel D. Rayl, Jerod Merkle, Kelly Proffitt, E. S. Almberg, Jennifer D. Jones, Justin Gude, Paul C. Cross
2021, Journal of Animal Ecology (90) 1264-1275
Wildlife migrations provide important ecosystem services, but they are declining. Within the Greater Yellowstone Ecosystem (GYE) some elk (Cervus canadensis) herds are losing migratory tendencies, which may increase spatiotemporal overlap between elk and livestock (domestic bison [Bison bison] and cattle [Bos taurus]), potentially exacerbating pathogen transmission risk.We combined disease,...
Volcanic Aquifers of Hawai‘i—Construction and calibration of numerical models for assessing groundwater availability on Kaua‘i, O‘ahu, and Maui
Scot K. Izuka, Kolja Rotzoll, Tracy Nishikawa
2021, Scientific Investigations Report 2020-5126
Steady-state numerical groundwater-flow models were constructed for the islands of Kaua‘i, O‘ahu, and Maui to enable quantification of the hydrologic consequences of withdrawals and other stresses that can place limits on groundwater availability. The volcanic aquifers of Hawai‘i supply nearly all drinking water for the islands’ residents, freshwater for diverse...
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...
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...
Evaluation of six methods for correcting bias in estimates from ensemble tree machine learning regression model
Kenneth Belitz, Paul E. 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...
Machine learning predicted redox conditions in the glacial aquifer system, northern continental United States
Melinda L. Erickson, Sarah M. Elliott, Craig J. Brown, Paul E. 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, Joshua 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...
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...
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...
Riverscape nesting dynamics of Neosho Smallmouth Bass: To cluster or not to cluster?
Andrew D. Miller, Shannon K. Brewer
2021, Diversity and Distributions (27) 1005-1018
AimHierarchical stream habitat conditions influence patterns of fish abundance and population dynamics. The spawning period is important for stream fishes but coincides with unpredictable environmental conditions and stressors. Thus, identifying habitats that confer suitable spawning is crucial to managing vulnerable fish populations, including narrow-range endemics. Here, we...
Local explosion detection and infrasound localization by reverse time migration using 3-D finite-difference wave propagation
David Fee, Liam Toney, Keehoon Kim, Richard Sanderson, Alexandra M. Iezzi, Robin S Matoza, Silvio DeAngelis, Art Jolly, John J. Lyons, Matthew M. Haney
2021, Frontiers in Earth Science (9)
Infrasound data are routinely used to detect and locate volcanic and other explosions, using both arrays and single sensor networks. However, at local distances (<15 km) topography often complicates acoustic propagation, resulting in inaccurate acoustic travel times leading to biased source locations when assuming straight-line propagation. Here we...
