Hydraulic tomography: 3D hydraulic conductivity, fracture network, and connectivity in mudstone
Claire R. Tiedeman, Warren Barrash
2020, Groundwater (58) 238-257
We present the first demonstration of hydraulic tomography (HT) to estimate the three-dimensional (3D) hydraulic conductivity (K) distribution of a fractured aquifer at high-resolution field scale (HRFS), including the fracture network and connectivity through it. We invert drawdown data collected from packer-isolated borehole intervals during 42...
Bridging the gap between salmon spawner abundance and marine nutrient assimilation by juvenile salmon: Seasonal cycles and landscape effects at the watershed scale
Philip J. Joy, Craig A. Stricker, Renae Ivanoff, Mark S. Wipfli, Andrew C. Seitz, Matthew Tyers
2020, Ecosystems (23) 338-358
Anadromous Pacific salmon are semelparous, and resource subsidies from spawning adults (marine-derived nutrients, or MDN) benefit juvenile salmonids rearing in freshwater. However, it remains unclear how MDN assimilation relates to spawner abundance within a watershed. To address this, we examined seasonal, watershed-scale patterns of MDN assimilation...
Spatial and temporal diving behavior of non-breeding common murres during two summers of contrasting ocean conditions
Stephanie A Laredo, Rachael A Orben, Robert M. Suryan, Donald E. Lyons, Josh Adams
2020, Journal of Experimental Marine Biology and Ecology 13-24
Successful foraging of marine predators depends on environmental conditions, which also influence prey availability. Neutral or negative El Niño Southern Oscillation and Pacific Decadal Oscillation ocean conditions during the summer of 2013 and strongly positive conditions during the summer of 2015 in the northern California Current System provided a case...
Conservation reliance of a threatened snake on rice agriculture
Brian J. Halstead, Jonathan P. Rose, Gabriel Reyes, Glenn D. Wylie, Michael L. Casazza
2020, Global Ecology and Conservation (19)
Conservation-reliant species require perpetual management by humans to persist. But do species that persist largely in human-dominated landscapes actually require conditions maintained by humans? Because most extant populations of giant gartersnakes (Thamnophis gigas) inhabit the highly modified rice agricultural regions of the Sacramento Valley, we sought to evaluate whether giant...
Validity of age estimates from muskellunge (Esox masquinongy) fin rays and associated effects on estimates of growth
Derek P. Crane, Marinda R. Cornett, Cory J. Bauerlien, Michael L. Hawkins, Daniel A. Isermann, Jeff L. Hansbarger, Kevin L. Kapuscinski, Jonathan R. Meerbeek, Timothy D. Simonson, Jeffrey M. Kampa
2020, Canadian Journal of Fisheries and Aquatic Sciences (77) 69-80
Accurate age estimates are critical for understanding life histories of fishes and developing management strategies for fish populations. However, validation of age estimates requires known-age fish, which are often lacking. We used known-age (ages 1–25) muskellunge (Esox masquinongy) to determine the precision and accuracy of age estimates from fin rays....
Trends in biodiversity and habitat quantification tools used for market‐based conservation in the United States
Scott J. Chiavacci, Emily Pindilli
2020, Conservation Biology (34) 125-136
Market-based conservation mechanisms are designed to facilitate conservation and mitigation actions for habitat and biodiversity. Their potential is partly hindered, however, by issues surrounding the quantification tools used to assess habitat quality and functionality. Specifically, a lack of transparency and standardization in tool development and gaps in tool...
Kinematic rupture modeling of ground motion from the M7 Kumamoto, Japan earthquake
Arben Pitarka, Robert Graves, Kojiro Irikura, Ken Miyakoshi, Artie Rogers
2020, Pure and Applied Geophysics (177) 2199-2221
We analyzed a kinematic earthquake rupture generator that combines the randomized spatial field approach of Graves and Pitarka (Bull Seismol Soc Am 106:2136–2153, <a id="ref-link-section-d19147e472" title="Graves, R., & Pitarka, A. (2016). Kinematic ground motion simulations on rough faults including effects of 3D Stochastic velocity perturbations. Bulletin of...
Revisiting “An Exercise in Groundwater Model Calibration and Prediction” after 30 years: Insights and New Directions
Randall J. Hunt, Michael N. Fienen, Jeremy T. White
2020, Groundwater (58) 168-182
In 1988, an important publication moved model calibration and forecasting beyond case studies and theoretical analysis. It reported on a somewhat idyllic graduate student modeling exercise where many of the system properties were known; the primary forecasts of interest were heads in pumping wells after a...
Songbird feathers as indicators of mercury exposure: High variability and low predictive power suggest limitations
Katherine E. Low, Danielle K. Ramsden, Allyson K. Jackson, Colleen Emery, W. Douglas Robinson, Jim Randolph, Collin A. Eagles-Smith
2020, Ecotoxicology (29) 1281-1292
Although feathers are commonly used to monitor mercury (Hg) in avian populations, their reliability as a sampling matrix has not been thoroughly assessed for many avian species, including most songbirds (Order Passeriformes). To better understand relationships between total Hg (THg) concentrations in feathers and other tissues for birds in the...
Advances in computational morphodynamics using the International River Interface Cooperative (iRIC) software
Yasuyuki Shimizu, Jonathan M. Nelson
2020, Earth Surface Processes and Landforms (45) 11-37
Results from computational morphodynamics modeling of coupled flow-bed-sediment systems are described for ten applications as a review of recent advances in the field. Each of these applications is drawn from solvers included in the public-domain International River Interface Cooperative (iRIC) software package. For mesoscale river features such as bars, predictions...
Ecosystem processes, landcover, climate, and human settlement shape dynamic distributions for golden eagle across the western US
J. D. Tack, B.R. Noon, Zachary H. Bowen, B.C. Fedy
2020, Animal Conservation (23) 72-82
Species–environment relationships for highly mobile species outside of the breeding season are often highly dynamic in response to the collective effects of ever‐changing climatic conditions, food resources, and anthropogenic disturbance. Capturing dynamic space‐use patterns in a model‐based framework is critical as model inference often drives place‐based conservation planning. We applied...
Assessment experimental semivariogram uncertainty in the presence of a polynomial drift
Erten Oktay, Eulogio Pardo-Iguzquiza, Ricardo A. Olea
2020, Natural Resources Research (29) 1087-1099
The semivariogram, which measures the spatial variability between experimental data, is generally used as a structural input in all two-point geostatistical procedures. However, in most geoscience applications, experimental semivariograms are usually computed from a limited number of sparsely spaced measurements, which results in uncertainty associated with the semivariance values estimated...
Statistical learning mitigation of false positives from template-detected data in automated acoustic wildlife monitoring
Cathleen M. Balantic, Therese M. Donovan
2020, Bioacoustics: The International Journal of Animal Sound and its Recording (29) 296-321
Audio sampling of the environment can provide long-term, landscape-scale presence-absence data to model populations of sound-producing wildlife. Automated detection systems allow researchers to avoid manually searching through large volumes of recordings, but often produce unacceptable false positive rates. We developed methods that allow researchers to improve template-based automated detection using...
Sedimentary evidence of prehistoric distant-source tsunamis in the Hawaiian Islands
SeanPaul La Selle, Bruce M. Richmond, Bruce E. Jaffe, Alan Nelson, Frances Griswold, Maria E.M. Arcos, Catherine Chague, James M. Bishop, Piero Bellanova, Haunani H. Kane, Brent D. Lunghino, Guy R. Gelfenbaum
2020, Sedimentology (67) 1249-1273
Over the past 200 years of written records, the Hawaiian Islands have experienced tens of tsunamis generated by earthquakes in the subduction zones of the Pacific "Ring of Fire" (e.g., Alaska-Aleutian, Kuril-Kamchatka, Chile, and Japan). Mapping and dating anomalous beds of sand and silt deposited by tsunamis in low-lying...
Pre-late Wisconsin valley-glacier erratics between Leavenworth and Peshastin, Wenatchee valley, Washington
Kelsay M. Stanton, Richard B. Waitt, William Long
2020, Northwest Science (92) 311-317
The late Wisconsin Icicle Creek alpine glacier transported tonalite boulders from the Mount Stuart batholith to arcuate end moraines in Icicle valley and Wenatchee valley near Leavenworth. Some previous workers considered sparsely weathered Mount Stuart boulders lying outside these moraines and draped by silt...
How lipid content and temperature affect American shad (Alosa sapidissima) attempt rate and sprint swimming: Implications for overcoming migration barriers
Shannon Michael Bayse, Stephen D. McCormick, Theodore R. Castro-Santos
2020, Canadian Journal of Fisheries and Aquatic Sciences (76) 2235-2244
How seasonal effects such as temperature increases and reduced lipid content affect the ability of anadromous fishes to traverse high-velocity barriers and sprint swimming is poorly understood. We evaluated American shad (Alosa sapidissima) swimming performance in a flume against high flow velocities (2.5–3.7 m·s−1) during the upstream migration period (April–May;...
Surficial geochemistry and bioaccessibility of tellurium in semi-arid mine tailings
Sarah M. Hayes, Nicole A Ramos
2020, Environmental Chemistry (16) 251-265
Tellurium (Te) is a critical element due to its use in solar technology. However, some forms are highly toxic. Few studies have examined Te behavior in the surficial environment, thus little is known about its potential human and environmental health impacts. This study characterizes two physicochemically distinct Te-enriched mine...
Using environmental DNA (eDNA) to assess the presence of cavefish and cave crayfish populations in caves of the Ozark Highlands
Shannon K. Brewer, Joshua B. Mouser, Ronald A. Van Den Bussche
2020, Cooperator Science Series CSS-135-2020
Many cavefishes and cave crayfishes are considered of conservation concern; however, sampling these species is inherently difficult given their occupied environments. The goal of our project was to verify the presence of select karst organisms while developing the foundation for sampling approaches that might be useful to conservation and management...
Weak effects of geolocators on small birds: a meta‐analysis controlled for phylogeny and publication bias
Vojtech Brlik, Jaroslav Kolecek, Malcolm Burgess, Steffen Hahn, Diana Humple, Milos Krist, Janne Ouwehand, Emily L. Weiser, Peter Adamik, Jose A. Alves, Debora Arlt, Sanja Barisic, Detlef Becker, Eduardo J. Belda, Vaclav Beran, Christiaan Both, Susana P. Bravo, Martins Briedis, Chutny Bohumir, Davor Cikovic, Nathan W. Cooper, Joana S. Costa, Victor R. Cueto, Tamara Emmenegger, Kevin Fraser, Olivier Gilg, Marina Guerrero, Michael T. Hallworth, Chris Hewson, Frederic Jiguet, James Johnson, Tosha Kelly, Dmitry Kishkinev, Michel Leconte, Terje Lislevand, Simeon Lisovski, Cosme Lopez, Kent P. McFarland, Peter P. Marra, Steven M. Matsuoka, Matyjasiak. Piotr, Christoph M. Meier, Benjamin Metzger, Juan S. Monros, Roland Neumann, Amy Newman, Ryan Norris, Tomas Part, Vaclav Pavel, Noah Perlut, Markus Piha, Jeroen Reneerkens, Christopher C. Rimmer, Amelie Roberto-Charro, Chiara Scandolara, Natalia Sokolova, Makiko Takenaka, Dirk Tolkmitt, Herman van Oosten, Arndt H. J. Wellbrock, Hazel Wheeler, Jan van der Winden, Klaudia Witte, Brad Woodworth, Petr Prochazka
2020, Journal of Animal Ecology (89) 207-220
Currently, the deployment of tracking devices is one of the most frequently used approaches to study movement ecology of birds. Recent miniaturisation of light‐level geolocators enabled studying small bird species whose migratory patterns were widely unknown. However, geolocators may reduce vital rates in tagged birds and may bias obtained movement...
Organic geochemical investigation of far‐field tsunami deposits of the Kahana Valley, O'ahu, Hawai'i
Piero Bellanova, Mike Frenken, Bruce M. Richmond, Jan Schwarzbauer, SeanPaul La Selle, Frances Griswold, Bruce E. Jaffe, Alan R. Nelson, Klaus Reicherter
2020, Sedimentology (67) 1230-1248
Far‐field tsunami deposits observed in the Kahana Valley, O'ahu, Hawai'i (USA), were investigated for their organic‐geochemical content. During short high‐energy events, (tsunamis and storms) organic and chemical components are transported with sediment from marine to terrestrial areas. This study investigates the use of anthropogenic based organic geochemical compounds (such as...
Evaluating catchability in a large-scale gillnet survey using hydroacoustics: Making the case for coupled surveys
Mark R. DuFour, Song S. Qian, Christine M Mayer, Christopher Vandergoot
2020, Fisheries Research (211) 309-318
Abundance estimates facilitate successful fisheries management. Fisheries agencies often monitor abundance through fishery independent standardized protocols generating relative measures such as catch-per-unit-effort (CPUE), where CPUE is assumed proportional to true abundance. Unfortunately, this assumption is rarely met as fish behavior and environmental...
Using redundant primer sets to detect multiple native Alaskan fish species from environmental DNA
Damian M. Menning, Trey Simmons, Sandra L. Talbot
2020, Conservation Genetics Resources (12) 109-123
Accurate and timely data regarding freshwater fish communities is important for informed decision-making by local, state, tribal, and federal land and resource managers; however, conducting traditional gear-based fish surveys can be an expensive and time-consuming process, particularly in remote areas, like those that characterize much of Alaska. To help address...
Quaternary eolian dunes and sand sheets in inland locations of the Atlantic Coastal Plain Province, USA
Christopher S. Swezey
2020, Book chapter, Inland dunes of North America
Quaternary eolian dunes and sand sheets that are stabilized by vegetation are present throughout many inland locations of the Atlantic Coastal Plain province (USA). These locations include river valleys, the Carolina Sandhills region, adjacent to Carolina Bays, and upland areas of the northern coastal plain. The eolian dunes...
Community tools for cartographic and photogrammetric processing of Mars Express HRSC images
Randolph L. Kirk, Elpitha Howington-Kraus, Kenneth Edmundson, Bonnie L. Redding, Donna M. Galuszka, Trent M. Hare, K. Gwinner
2020, Book chapter, Planetary remote sensing and mapping
In this chapter we describe the software we have developed for photogrammetric processing of images from the Mars Express High Resolution Stereo Camera (MEX HRSC) to produce digital topographic models (DTMs) and orthoimages, as well as testing we have performed. HRSC has returned images, including stereo and color coverage of...
Calibrating geosynchronous and polar orbiting satellites: Sharing best practices
Dennis Helder, David Doelling, Rajendra Bhatt, Taeyoung Choi, Julia A. Barsi
2020, Remote Sensing (12)
Earth remote sensing optical satellite systems are often divided into two categories—geosynchronous and sun-synchronous. Geosynchronous systems essentially rotate with the Earth and continuously observe the same region of the Earth. Sun-synchronous systems are generally in a polar orbit and view differing regions of the Earth at the same local time....
