Towards understanding relationships between atmospheric pressure variations and long-period horizontal seismic data: A case study
Alexis Casondra Bianca Alejandro, Adam T. Ringler, David C. Wilson, Robert E. Anthony, S.V. Moore
2020, Geophysical Journal International (223) 676-691
Variations in atmospheric pressure have long been known to introduce noise in long-period (>10 s) seismic records. This noise can overwhelm signals of interest such as normal modes and surface waves. Generally, this noise is most pronounced on the horizontal components where it arises due to tilting of the seismometer...
Kinematics of fault slip associated with the July 4-6 2019 Ridgecrest, Californai earthquakes sequence
Frederick Pollitz, Jessica R. Murray, Jerry L. Svarc, Charles Wicks, Evelyn Roeloffs, Sarah E. Minson, Katherine M. Scharer, Katherine J. Kendrick, Kenneth W. Hudnut, Johanna Nevitt, Benjamin A. Brooks, David Mencin
2020, Bulletin of the Seismological Society of America (110) 1688-1700
The 2019 Ridgecrest, California, earthquake sequence produced observable crustal deformation over much of central and southern California, as well as surface rupture over several tens of kilometers. To obtain a detailed picture of the fault slip involved in the 4 July M 6.4 foreshock and 6 July M 7.1 mainshock, we combine strong‐motion seismic...
Mapping the 3-D extent of the Stillwater Complex, Montana—Implications for potential platinum group element exploration and development
Carol A. Finn, Michael L. Zientek, Heather L. Parks, Dana E. Peterson
2020, Precambrian Research (348)
Geophysical models characterize the exposed and interpreted buried extent of the Stillwater Complex, critical for understanding the origin of the layered mafic intrusion and its associated high-grade platinum group element resources. The 3D models, constrained by gravity, magnetic, xenolith, seismic, borehole, and rock property data indicate that the likely maximum...
A GT-seq panel for walleye (Sander vitreus) provides important insights for efficient development and implementation of amplicon panels in non-model organisms
Matthew L. Bootsma, Kristen Gruenthal, Garrett McKinney, Levi Simmons, Loren Miller, Greg G. Sass, Wesley Larson
2020, Molecular Ecology Resources (20) 1706-1722
Targeted amplicon sequencing methods, such as genotyping-in-thousands by sequencing (GT-seq), facilitate rapid, accurate, and cost-effective analysis of hundreds of genetic loci in thousands of individuals. Development of GT-seq panels is nontrivial, but studies describing trade-offs associated with different steps of GT-seq panel development are rare. Here, we construct a dual-purpose...
Distribution of earthquakes on a branching fault system using integer programming and greedy sequential methods
Eric L. Geist, Thomas E. Parsons
2020, Geochemistry, Geophysics, Geosystems (21)
A new global optimization method is used to determine the distribution of earthquakes on a complex, connected fault system. The method, integer programming, has been advanced in the field of operations research, but has not been widely applied to geophysical problems until recently. In this application, we determine...
Legacy and current-use toxic contaminants in Pacific sand lance (Ammodytes personatus) from Puget Sound, Washington
Kathleen E. Conn, Theresa L. Liedtke, Renee K. Takesue, Richard S. Dinicola
2020, Marine Pollution Bulletin (158)
Forage fish are primary prey for seabirds, fish and marine mammals. Elevated levels of pollutants in Puget Sound, Washington salmon and killer whale tissues potentially could be sufficiently high to elicit adverse effects and hamper population recovery efforts. Contaminant transfer and biomagnification of the toxic compounds measured in this study...
Does fecundity of cisco vary in the Upper Great Lakes?
Daniel Yule, Jamie A. Dobosenski, Jared T. Myers, Mark Ebener, Randall M. Claramunt, James E. McKenna Jr., H. George Ketola, Owen T. Gorman
2020, North American Journal of Fisheries Management (40) 973-985
Fecundity of fish is influenced by several factors, including body length, condition, population density, and environmental conditions. It follows that fecundity of fish populations can exhibit spatiotemporal variability; thus, periodic quantification of length–fecundity relationships is important for management. We hypothesized that average fecundity of Cisco Coregonus artedi in...
Seasonal dynamics and interannual variability in mercury concentrations and loads through a three-reservoir complex
Austin K. Baldwin, Brett Poulin, Jesse Naymik, Charles Hoovestol, Gregory M. Clark, David P. Krabbenhoft
2020, Environmental Science & Technology (51) 9305-9314
The Hells Canyon Complex (HCC) along the Snake River (Idaho-Oregon border, USA) encompasses three successive reservoirs that seasonally stratify, creating anoxic conditions in the hypolimnion that promote methylmercury (MeHg) production. This study quantified seasonal dynamics and interannual variability in mercury concentrations (inorganic divalent mercury (IHg) and MeHg) and loads at...
Hypoxia augments edge effects of water column stratification on fish distribution
Derek W. Chamberlin, Carey Knight, Richard Kraus, Ann Marie Gorman, Wenzhao Xu, Paris D. Collingsworth
2020, Fisheries Research (231)
Hypoxic conditions in both freshwater and marine habitats have a significant effect on the distribution of fish in the water column, resulting in some fishes aggregating near the edges of the hypoxic zone. These aggregations may increase fish susceptibility to fishing gears, with attendant effects on stock assessment inferences. We...
Wastewater-based epidemiology pilot study to examine drug use in the Western United States
Nicholas Bishop, Tammy Jones-Lepp, Miranda Margetts, Jordan Sykes, David A. Alvarez, Deborah Keil
2020, Science of the Total Environment (745)
The extent of prescription and illicit drug abuse in geographically isolated rural and micropolitan communities in the intermountain western United States (US) has not been well tracked. The goal of this pilot study was to accurately measure drug dose consumption rates (DCR) between two...
Assessing the vulnerability of military installations in the coterminous United States to potential biome shifts resulting from rapid climate change
Richard H. Odom, W. Mark Ford
2020, Environmental Management (66) 564-589
Climate change impacts to Department of Defense (DoD) installations will challenge future military mission and natural resource stewardship efforts by increasing vulnerability to flooding, drought, altered fire regimes, invasive species, etc. We developed biome classifications based on current climate for the coterminous United States using the Holdridge Life Zone...
Linking nest microhabitat selection to nest survival within declining pheasant populations in the Central Valley of California
Ian Dwight, Jessica H Vogt, Peter S. Coates, Joseph P. Fleskes, Daniel P. Connelly, Scott C. Gardner
2020, Wildlife Research (47) 391-403
Context: The ring-necked pheasant (Phasianus colchicus) has experienced considerable population declines in recent decades, especially in agricultural environments of the Central Valley of California. Although large-scale changes in land cover have been reported as an important driver of population dynamics, the effects of microhabitat conditions on specific demographic rates (e.g. nesting)...
Benthic suffocation of invasive lake trout embryos by fish carcasses and sedimentation in Yellowstone Lake
Alex S. Poole, Todd M. Koel, Nathan A. Thomas, Alexander V. Zale
2020, North American Journal of Fisheries Management (40) 1077-1086
Introduced Lake Trout Salvelinus namaycush threaten native Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in Yellowstone Lake, Yellowstone National Park, where gill nets have been used to suppress subadult and adult Lake Trout since 1995. However, survival of embryonic and larval life history stages can have profound effects on the population...
Hydrologic conditions in Kansas, water year 2019
Chantelle Davis
2020, Fact Sheet 2020-3029
The U.S. Geological Survey Kansas Water Science Center, in cooperation with Federal, State, and local agencies, maintains a long-term network of hydrologic monitoring stations in the State of Kansas. These include a network of 217 real-time streamgages and 12 real-time reservoir-level monitoring stations in water year 2019. The data and associated analyses...
Stable isotope analysis of multiple tissues from Hawaiian honeycreepers indicates elevational movement
Kristina L. Paxton, Jeffery F Kelly, Sandra M Pletchet, Eben H. Paxton
2020, PLoS ONE (15)
We have limited knowledge of the patterns, causes, and prevalence of elevational migration despite observations of seasonal movements of animals along elevational gradients in montane systems worldwide. While a third of extant Hawaiian landbird species are estimated to be elevational migrants this assumption is based primarily on early naturalist’s observations...
Using a structured decision analysis to evaluate bald eagle vital signs monitoring in Southwest Alaska National Parks
Rebecca Kolstrom, Tammy L. Wilson, Larry M. Gigliotti
2020, Ecology and Evolution (10) 8114-8126
1. Monitoring programs can benefit from an adaptive monitoring approach, where key decisions about why, where, what, and how to monitor are revisited periodically in order to ensure programmatic relevancy. 2. The National Park Service (NPS) monitors status and trends of Vital Signs to evaluate compliance with the NPS mission....
Shoreline retreat of the Corte Madera marshes, 1853 to 2016, Marin County, California
Bradley A. Carkin, Robert E. Kayen, Florence L. Wong
2020, Open-File Report 2020-1074
The greater San Francisco Bay estuary, prior to human intervention, encompassed about 2,200 km2 of tidal and salt marshes. Over time, these areas became increasingly diked, developed, and altered from their natural state. In addition, natural forces are always driving a continually shifting equilibrium.This study area, the Corte Madera marshes,...
Monthly suspended-sediment apportionment for a western Lake Erie agricultural tributary
Tanja N. Williamson, Edward G. Dobrowolski, Allen C. Gellis, Timur Sabitov, Lillian E. Gorman Sanisaca
2020, Journal of Great Lakes Research (46) 1307-1320
Black Creek, a headwater to the Maumee River and western Lake Erie, is an agricultural basin with a mix of cropland (66%), pasture (19%), and forest (7%) linked by a road network to the rural community. Suspended sediment was collected monthly during the 2018 water year for the main...
Predicting microcystin concentration action-level exceedances resulting from cyanobacterial blooms in selected lake sites in Ohio
Donna S. Francy, Amie M.G. Brady, Erin A. Stelzer, Jessica R. Cicale, Courtney Paige Hackney, Harrison D Dalby, Pamela Struffolino, Daryl F. Dwyer
2020, Environmental Monitoring and Assessment (192)
Cyanobacterial harmful algal blooms and the toxins they produce are a global water-quality problem. Monitoring and prediction tools are needed to quickly predict cyanotoxin action-level exceedances in recreational and drinking waters used by the public. To address this need, data were collected at eight locations in Ohio, USA, to identify...
Comparative phylogenomics reveal complex evolution of life history strategies in a clade of bivalves with parasitic larvae (Bivalvia: Unionoida: Ambleminae)
Chase H. Smith, John M. Pfeiffer, Nathan A. Johnson
2020, Cladistics (36) 505-520
Freshwater mussels are a species‐rich group with biodiversity patterns strongly shaped by a life history strategy that includes an obligate parasitic larval stage. In this study, we set out to reconstruct the life history evolution and systematics in a clade of freshwater mussels adapted to parasitizing a molluscivorous host fish....
Causes of land change in the U.S. Interior Highlands, 2001–2011
Mark A. Drummond, Michael P. Stier, Jamie L. McBeth, Roger F. Auch, Janis L. Taylor, Jodi L. Riegle
2020, Data Series 1127
The causes of land change from 2001 through 2011 for the Interior Highlands region of the south-central United States were assessed using satellite imagery, historical land-use and land-cover data, and digital orthophotos. The study was designed to develop improved regional land-use and land-cover change information, including identification of the proximate...
Spatial proximity moderates genotype uncertainty in genetic tagging studies
Ben C. Augustine, Andy Royle, Daniel W. Linden, Angela K. Fuller
2020, Proceedings of the National Academy of Sciences (117) 17903-17912
Accelerating declines of an increasing number of animal populations worldwide necessitate methods to reliably and efficiently estimate demographic parameters such as population density and trajectory. Standard methods for estimating demographic parameters from noninvasive genetic samples are inefficient because lower-quality samples cannot be used, and they assume individuals are identified without...
Time-evolving surface and subsurface signatures of Quaternary volcanism in the Cascades arc
Daniel O’Hara, Leif Karlstrom, David W. Ramsey
2020, Geology (48) 1088-1093
Increased resolution of data constraining topography and crustal structures provides new quantitative ways to assess province-scale surface-subsurface connections beneath volcanoes. We used a database of mapped vents to extract edifices with known epoch ages from digital elevation models (DEMs) in the Cascades arc (western North...
Robust age estimation of southern sea otters from multiple morphometrics
Teri E. Nicholson, Karl A. Mayer, Michelle M. Staedler, Tyler O Gagne, Michael J. Murray, Marissa A Young, Joseph A. Tomoleoni, M. Tim Tinker, Kyle S. Van Houtan
2020, Ecology and Evolution (10) 8592-8609
Reliable age estimation is an essential tool to assess the status of wildlife populations and inform successful management. Aging methods, however, are often limited by too few data, skewed demographic representation, and by single or uncertain morphometric relationships. In this study, we synthesize age estimates in southern sea otters Enhydra lutris...
Possible control of acute outbreaks of a marine fungal pathogen by nominally herbivorous tropical reef fish
B. P. Neal, B. Honish, T. Warrender, G. J. Williams, Thierry M. Work, N. N. Price
2020, Oecologia (193) 603-617
Primary producers in terrestrial and marine systems can be affected by fungal pathogens threatening the provision of critical ecosystem services. Crustose coralline algae (CCA) are ecologically important members of tropical reef systems and are impacted by coralline fungal disease (CFD) which manifests as overgrowth of the CCA crust by fungal...
