Implications of the earthquake cycle for inferring fault locking on the Cascadia megathrust
Frederick Pollitz, Eileen Evans
2017, Geophysical Journal International (209) 167-185
GPS velocity fields in the Western US have been interpreted with various physical models of the lithosphere-asthenosphere system: (1) time-independent block models; (2) time-dependent viscoelastic-cycle models, where deformation is driven by viscoelastic relaxation of the lower crust and upper mantle from past faulting events; (3) viscoelastic block models, a time-dependent...
Geology along the Blue Ridge Parkway in Virginia
Mark W. Carter, C. Scott Southworth, Richard P. Tollo, Arthur J. Merschat, Sara Wagner, Ava Lazor, John N. Aleinikoff
2017, Book chapter, From the Blue Ridge to the beach: Geological field excursions across Virginia
Detailed geologic mapping and new SHRIMP (sensitive high-resolution ion microprobe) U-Pb zircon, Ar/Ar, Lu-Hf, 14C, luminescence (optically stimulated), thermochronology (fission-track), and palynology reveal the complex Mesoproterozoic to Quaternary geology along the ~350 km length of the Blue Ridge Parkway in Virginia. Traversing the boundary of the central and southern Appalachians, rocks...
The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats
Christine May, Joshua J. Roering, Kyle Snow, Kitty Griswold, Robert E. Gresswell
2017, Geomorphology (277) 228-236
Waterfalls create barriers to fish migration, yet hundreds of isolated salmonid populations exist above barriers and have persisted for thousands of years in steep mountainous terrain. Ecological theory indicates that small isolated populations in disturbance-prone landscapes are at greatest risk of extirpation because immigration and recolonization are not possible. On...
Imaging of earthquake faults using small UAVs as a pathfinder for air and space observations
Andrea Donnellan, Joseph Green, Adnan Ansar, Joseph Aletky, Margaret Glasscoe, Yehuda Ben-Zion, J. Ramon Arrowsmith, Stephen B. DeLong
2017, Conference Paper, 2017 IEEE Aerospace Conference Proceedings
Large earthquakes cause billions of dollars in damage and extensive loss of life and property. Geodetic and topographic imaging provide measurements of transient and long-term crustal deformation needed to monitor fault zones and understand earthquakes. Earthquake-induced strain and rupture characteristics are expressed in topographic features imprinted on the landscapes of...
A 600-year-long stratigraphic record of tsunamis in south-central Chile
Isabel Hong, Tina Dura, Lisa L. Ely, Benajamin P. Horton, Alan R. Nelson, Marco Cisternas, Daria Nikitina, Robert L. Wesson
2017, The Holocene (27) 39-51
The stratigraphy within coastal river valleys in south-central Chile clarifies and extends the region’s history of large, earthquakes and accompanying tsunamis. Our site at Quidico (38.1°S, 73.3°W) is located in an overlap zone between ruptures of magnitude 8–9 earthquakes in 1960 and 2010, and, therefore, records tsunamis originating from subduction-zone...
Diet patterns of island foxes on San Nicolas Island relative to feral cat removal
Brian L. Cypher, Erica C. Kelly, Francesca J. Ferrara, Charles A. Drost, Tory L. Westall, Brian Hudgens
2017, Pacific Conservation Biology (23) 180-188
Island foxes (Urocyon littoralis) are a species of conservation concern that occur on six of the Channel Islands off the coast of southern California. We analysed island fox diet on San Nicolas Island during 2006–12 to assess the influence of the removal of feral cats (Felis catus) on the food...
Infectious hematopoietic necrosis virus virological and genetic surveillance 2000–2012
Rachel Breyta, Ilana L. Brito, Gael Kurath, Shannon L. LaDeau
2017, Ecology (98) 283-283
Surveillance records of the acute RNA pathogen of Pacific salmonid fish infectious hematopoietic necrosis virus are combined for the first time to enable landscape-level ecological analyses and modeling. The study area is the freshwater ecosystems of the large Columbia River watershed in the U.S. states of Washington, Oregon, and Idaho,...
Drivers of Holocene sea-level change in the Caribbean
Nicole Khan, Erica Ashe, Benjamin P. Horton, Andrea Dutton, Robert E. Kopp, Gilles Brocard, Simon E. Engelhart, David F. Hill, W.R. Peltier, Christopher H. Vane, Fred N. Scatena
2017, Quaternary Science Reviews (155) 13-36
We present a Holocene relative sea-level (RSL) database for the Caribbean region (5°N to 25°N and 55°W to 90°W) that consists of 499 sea-level index points and 238 limiting dates. The database was compiled from multiple sea-level indicators (mangrove peat, microbial mats, beach rock and acroporid and massive corals). We...
Replication and shedding kinetics of infectious hematopoietic necrosis virus in juvenile rainbow trout
Andrew R. Wargo, Robert J. Scott, Benjamin Kerr, Gael Kurath
2017, Virus Research (227) 200-211
Viral replication and shedding are key components of transmission and fitness, the kinetics of which are heavily dependent on virus, host, and environmental factors. To date, no studies have quantified the shedding kinetics of infectious hematopoietic necrosis virus (IHNV) in rainbow trout (Oncorhynchus mykiss), or how they are associated with...
Mercury bioaccumulation in estuarine fishes: Novel insights from sulfur stable isotopes
James J. Willacker, Collin A. Eagles-Smith, Joshua T. Ackerman
2017, Environmental Science & Technology (51) 2131-2139
Estuaries are transitional habitats characterized by complex biogeochemical and ecological gradients that result in substantial variation in fish total mercury concentrations (THg). We leveraged these gradients and used carbon (δ13C), nitrogen (δ15N), and sulfur (δ34S) stable isotopes to examine the ecological and biogeochemical processes underlying THg bioaccumulation in fishes from...
Pharmaceuticals and personal care products (PPCPs) are ecological disrupting compounds (EcoDC)
Erinn Richmond, Michael R. Grace, John R. Kelly, Andrew Reisinger, Emma J. Rosi, David M. Walters
2017, Elementa: Science of the Anthropocene (5) 1-8
Pharmaceuticals and personal care products (PPCPs) are ubiquitous in freshwater ecosystems worldwide and are recognized as contaminants of concern. Currently, contaminants of concern are classified for their persistence, bioaccumulation, and toxicity (PBT criteria). PPCPs are not classified as persistent organic pollutants (POPs), although some PPCPs share characteristics similar to POPs....
Low thinning and crown thinning of two severities as restoration tools at Redwood National Park
Jason R Teraoka, Phillip J. van Mantgem, Christopher R. Keyes
2017, General Technical Report PSW-GTR-258
Interest in the restoration of second-growth forests has continued to increase in the redwood region, which has further increased the importance of evaluating restoration-based silvicultural strategies. This study assessed the short-term effectiveness of four silvicultural treatments (two silvicultural thinning methods, low thinning and crown thinning, and two basal area retentions,...
Nutrients, phytoplankton, zooplankton, and macrobenthos
Lars G. Rudstam, Kristen T. Holeck, James M. Watkins, Christopher Hotaling, Jana R. Lantry, Kelly L. Bowen, Mohi Munawar, Brian Weidel, Richard Barbiero, Frederick J. Luckey, Alice Dove, Timothy B. Johnson, Zy Biesinger
2017, Special Publication 2017-02
Lower trophic levels support the prey fish on which most sport fish depend. Therefore, understanding the production potential of lower trophic levels is integral to the management of Lake Ontario’s fishery resources. Lower trophic-level productivity differs among offshore and nearshore waters. In the offshore, there is concern about the ability of...
Dissolution of fluorapatite by Pseudomonas fluorescens P35 resulting in fluorine release
Jianping Zhou, Hongmei Wang, Charles A. Cravotta III, Qiang Dong, Xing Xiang
2017, Geomicrobiology Journal (34) 421-433
Chemical weathering of fluorine-bearing minerals is widely accepted as the main mechanism for the release of fluorine (F) to groundwater. Here, we propose a potential mechanism of F release via microbial dissolution of fluorapatite (Ca5(PO4)3F), which has been neglected previously. Batch culture experiments were conducted at 30°C with a phosphate-solubilizing...
Sub-indicator: Prey fish
Brian Weidel, Erin Dunlop
2017, Report, Sate of the Great Lakes 2017 Technical Report
Prey fish communities across the Great Lakes continue to change, although the direction and magnitude of those changes are not consistent across the lakes. The metrics used to categorize prey fish status in this and previous periods are based on elements that are common among each of the lake’s Fish...
A global analysis of traits predicting species sensitivity to habitat fragmentation
Douglas Keinath, Daniel F. Doak, Karen E. Hodges, Laura R. Prugh, William F. Fagan, Cagan H. Sekercioglu, Stuart H. M. Buchart, Matthew J. Kauffman
2017, Global Ecology and Biogeography (26) 115-127
AimElucidating patterns in species responses to habitat fragmentation is an important focus of ecology and conservation, but studies are often geographically restricted, taxonomically narrow or use indirect measures of species vulnerability. We investigated predictors of species presence after fragmentation using data from studies around the world that included all four...
Understanding the past to interpret the future: Comparison of simulated groundwater recharge in the upper Colorado River basin (USA) using observed and general-circulation-model historical climate data
Fred D. Tillman, Subhrendu Gangopadhyay, Tom Pruitt
2017, Hydrogeology Journal (25) 347-358
In evaluating potential impacts of climate change on water resources, water managers seek to understand how future conditions may differ from the recent past. Studies of climate impacts on groundwater recharge often compare simulated recharge from future and historical time periods on an average monthly or overall average annual basis,...
Forest restoration at Redwood National Park: exploring prescribed fire alternatives to second-growth management: a case study
Eamon Engber, Jason Teraoka, Phillip J. van Mantgem
2017, General Technical Report PSW-GTR-258
Almost half of Redwood National Park is comprised of second-growth forests characterized by high stand density, deficient redwood composition, and low understory biodiversity. Typical structure of young redwood stands impedes the recovery of old-growth conditions, such as dominance of redwood (Sequoia sempervirens (D. Don) Endl.), distinct canopy layers and diverse...
Crop modeling applications in agricultural water management
Isaya Kisekka, Kendall C. DeJonge, Liwang Ma, Joel Paz, Kyle R. Douglas-Mankin
2017, Transactions of the ASABE (60) 1959-1964
This article introduces the fourteen articles that comprise the “Crop Modeling and Decision Support for Optimizing Use of Limited Water” collection. This collection was developed from a special session on crop modeling applications in agricultural water management held at the 2016 ASABE Annual International Meeting (AIM) in Orlando, Florida. In...
Effect of N fertilization and tillage on nitrous oxide (N2O) loss from soil under wheat production
Sheel Bansal, Ezra Aberle, Jasper Teboh, Szilvia Yuja, Mark Liebig, Jacob Meier, Alec Boyd
2017, Report, Carrington Research Extension Center Annual Report, A report of agricultural research and extension in central North Dakota, Vol 58
Nitrous oxide (N2O-N) is one of the most important gases in the atmosphere because it is 300 times more powerful than carbon dioxide in its ability to trap heat, and is a key chemical agent of ozone depletion. The amount of N2O-N emitted from agricultural fields can be quite high,...
Geologic map of the Bateman Spring Quadrangle, Lander County, Nevada
Alan R. Ramelli, Chester T. Wrucke, Kyle House
2017, Nevada Bureau of Mines and Geology Map 185
This 1:24,000-scale geologic map of the Bateman Spring 7.5-minute quadrangle in Lander County, Nevada contains descriptions of 24 geologic units and one cross section. Accompanying text includes full unit descriptions and references. This quadrangle includes lower Paleozoic siliciclastic sedimentary rocks of the Roberts Mountain allochthon, Miocene intrusive dikes, alluvial deposits...
Adaptive management of rangeland systems
Craig R. Allen, David G. Angeler, Joseph J. Fontaine, Ahjond S. Garmestani, Noelle M. Hart, Kevin L. Pope, Dirac Twidwell
2017, Book chapter, Rangeland Systems: Processes, Management and Challenges
Adaptive management is an approach to natural resource management that uses structured learning to reduce uncertainties for the improvement of management over time. The origins of adaptive management are linked to ideas of resilience theory and complex systems. Rangeland management is particularly well suited for the application of adaptive management,...
A network model framework for prioritizing wetland conservation in the Great Plains
Gene Albanese, David A. Haukos
2017, Landscape Ecology (32) 115-130
ContextPlaya wetlands are the primary habitat for numerous wetland-dependent species in the Southern Great Plains of North America. Plant and wildlife populations that inhabit these wetlands are reciprocally linked through the dispersal of individuals, propagules and ultimately genes among local populations.Objective<p id="Par2"...
Social-ecological outcomes in recreational fisheries: The interaction of lakeshore development and stocking
Jacob P. Ziegler, Elizabeth J. Golebie, Stuart E. Jones, Brian Weidel, Christopher T. Solomon
2017, Ecological Applications (27) 56-65
Many ecosystems continue to experience rapid transformations due to processes like land use change and resource extraction. A systems approach to maintaining natural resources focuses on how interactions and feedbacks among components of complex social‐ecological systems generate social and ecological outcomes. In recreational fisheries, residential shoreline development and fish stocking...
Validation of daily increments periodicity in otoliths of spotted gar
Richard A. Snow, James M. Long, Bryan D. Frenette
2017, Journal of the Southeastern Association of Fish and Wildlife Agencies (4) 60-65
Accurate age and growth information is essential in successful management of fish populations and for understanding early life history. We validated daily increment deposition, including the timing of first ring formation, for spotted gar (Lepisosteus oculatus) through 127 days post hatch. Fry were produced from hatchery-spawned specimens, and up to...
