Damping values derived from surface-source, downhole-receiver measurements at 22 sites in the San Francisco Bay Area of central California and the San Fernando Valley of southern California
David Boore, James F. Gibbs, William B. Joyner
2021, Bulletin of the Seismological Society of America (111) 2158-2166
A method discussed in Gibbs, Boore, et al. (1994) was applied to surface‐source, downhole‐receiver recordings at 22 boreholes, in the San Francisco Bay area in central California and the San Fernando Valley of southern California, to determine the average damping ratio of shear waves over depth intervals ranging from about 10 m...
Understanding collaborative governance from a communication network perspective: A case study of the Atlantic Salmon recovery framework
Melissa. E. Flye, Carly. C Sponarski, Joseph D. Zydlewski, Bridie McGreavy
2021, Environmental Science and Policy (115) 79-90
Atlantic salmon populations in Maine remain critically low despite extensive hatchery supplementation and habitat improvement efforts. In 2000, the Gulf of Maine Distinct Population Segment was listed as Endangered under the ESA with joint listing authority shared by the National Oceanic and Atmospheric Administration (NOAA) and the United States Fish...
Transport and speciation of uranium in groundwater-surface water systems impacted by legacy milling operations
Patrick A. Byrne, Christopher C. Fuller, David L. Naftz, Robert L. Runkel, Niklas J Lehto, William L Dam
2021, Science of the Total Environment (761)
Growing worldwide concern over uranium contamination of groundwater resources has placed an emphasis on understanding uranium transport dynamics and potential toxicity in groundwater-surface water systems. In this study, we utilized novel in-situ sampling methods to establish the location and magnitude of contaminated groundwater entry into a receiving surface water environment,...
Thinking like a consumer: Linking aquatic basal metabolism and consumer dynamics
Janine Ruegg, Caitlin C Conn, Elizabeth P Anderson, Tom J Battin, Emily S. Bernhardt, Marta Boix Canadell, Sophia M Bonjour, Jacob D. Hosen, Nicholas S Marzolf, Charles Yackulic
2021, Limnology and Oceanography Letters (6) 1-17
The increasing availability of high‐frequency freshwater ecosystem metabolism data provides an opportunity to identify links between metabolic regimes, as gross primary production and ecosystem respiration patterns, and consumer energetics with the potential to improve our current understanding of consumer dynamics (e.g., population dynamics, community structure, trophic...
Preparing wildlife for climate change: How far have we come?
Olivia E. LeDee, Stephen D. Handler, Christopher L. Hoving, Christopher W. Swanston, Benjamin Zuckerberg
2021, Journal of Wildlife Management (85) 7-16
Global biodiversity is in unprecedented decline and on-the-ground solutions are imperative for conservation. Although there is a large volume of evidence related to climate change effects on wildlife, research on climate adaptation strategies is lagging. To assess the current state of knowledge in climate...
A generic soil velocity model that accounts for near-surface conditions and deeper geologic structure
Nasser A. Marafi, Alex R. Grant, Brett W. Maurer, Gunjan Rateria, Marc O Eberhard, Jeff W Berman
2021, Soil Dynamics and Earthquake Engineering (140)
Near-surface soil conditions can significantly alter the amplitude and frequency content of incoming ground motions – often with profound consequences for the built environment – and are thus important inputs to any ground-motion prediction. Previous soil-velocity models (SVM) have predicted shear-wave...
Applying cumulative effects to strategically advance large‐scale ecosystem restoration
Heida L. Diefenderfer, Gregory Steyer, Matthew C. Harwell, Andrew J LoSchiavo, Hilary A. Neckles, David M. Burdick, Gary E. Johnson, Kate E. Buenau, Elene Trujillo, John C. Callaway, Ronald M. Thom, Neil K. Ganju, Robert R. Twilley
2021, Frontiers in Ecology and the Environment (19) 108-117
International efforts to restore degraded ecosystems will continue to expand over the coming decades, yet the factors contributing to the effectiveness of long‐term restoration across large areas remain largely unexplored. At large scales, outcomes are more complex and synergistic than the additive impacts of individual restoration projects. Here, we propose...
Evaluation of seismic hazard models with fragile geologic features
Mark W. Stirling, Mike Oskin, J. Ramon Arrowsmith, Anna H. Rood, Christine A. Goulet, Lisa Grant Ludwig, Tamarah King, Albert Kottke, Julian C. Lozos, Chris L M Madugo, Devin McPhillips, Dylan Rood, Norman Sleep, Christine Wittich
2021, Seismological Research Letters (92) 314-324
We provide an overview of a 2019 workshop on the use of fragile geologic features (FGFs) to evaluate seismic hazard models. FGFs have been scarcely utilized in the evaluation of seismic hazard models, despite nearly 30 yr having passed since the first recognition of their...
Possible effects of climate change on ixodid ticks and the pathogens they transmit: Predictions and observations
Nicholas H. Ogden, Charles B. Beard, Howard S. Ginsberg, Jean I. Tsao
2021, Journal of Medical Entomology (58) 1536-1545
The global climate has been changing over the last century due to greenhouse gas emissions and will continue to change over this century, accelerating without effective global efforts to reduce emissions. Ticks and tick-borne diseases (TTBDs) are inherently climate-sensitive due to the sensitivity of tick lifecycles to climate. Key...
Estimating the contribution of tributary sand inputs to controlled flood deposits for sandbar restoration using elemental tracers, Colorado River, Grand Canyon National Park, Arizona
Katherine A. Chapman, Rebecca J. Best, M. Elliot Smith, Erich R. Mueller, Paul E. Grams, Roderic A. Parnell
2021, Geological Society of America Bulletin (133) 1141-1156
Completion of Glen Canyon Dam in 1963 resulted in complete elimination of sediment delivery from the upstream Colorado River basin to Grand Canyon and nearly complete control of spring snowmelt floods responsible for creating channel and bar morphology. Management of the river ecosystem in Grand Canyon National Park now relies...
Carrying capacity of spatially distributed metapopulations
Bo Zhang, Don DeAngelis, Wei-Ming Ni
2021, Trends in Ecology and Evolution (36) 164-173
Carrying capacity is a key concept in ecology. A body of theory, based on the logistic equation, has extended predictions of carrying capacity to spatially distributed, dispersing populations. However, this theory has only recently been tested empirically. The experimental results disagree...
Post-glacial Mw 7.0-7.5 earthquakes on the North Olympic fault zone, Washington
Elizabeth R. Schermer, Colin B. Amos, W. Cody Duckworth, Alan Nelson, Stephen J. Angster, Jaime Delano, Brian Sherrod
2021, Bulletin of the Seismological Society of America (111) 490-513
Holocene crustal faulting in the northern Olympic Peninsula of Washington State manifests in a zone of west‐northwest‐striking crustal faults herein named the North Olympic fault zone, which extends for ∼80  km">∼80 <span...
Spatial and temporal patterns of low streamflow and precipitation changes in the Chesapeake Bay Watershed
Brandon J. Fleming, Stacey A. Archfield, Robert M. Hirsch, Julie E. Kiang, David M. Wolock
2021, Journal of the American Water Resources Association (57) 96-108
Spatial and temporal patterns in low streamflows were investigated for 183 streamgages located in the Chesapeake Bay Watershed for the period 1939–2013. Metrics that represent different aspects of the frequency and magnitude of low streamflows were examined for trends: (1) the annual time series of seven‐day average minimum streamflow, (2)...
Habitat modelling locates nesting areas of the endangered Black-capped Petrel Pterodroma hasitata on Hispaniola and identifies habitat loss
Y. G. Satge, E. Rupp, A. J. Brown, Patrick G.R. Jodice
2021, Bird Conservation International (31) 573-590
The Black-capped Petrel or Diablotin Pterodroma hasitata has a fragmented and declining population estimated at c.1,000 breeding pairs. On land, the species nests underground in steep ravines with dense understorey vegetation. The only confirmed breeding sites are located in the mountain ranges of Hispaniola in the Caribbean, where habitat loss and...
Surface elevation change evaluation in mangrove forests using a low‐cost, rapid‐scan terrestrial laser scanner
Ali Rouzbeh Kargar, Richard A. MacKenzie, Alexander Fafard, Ken Krauss, Jan van Aardt
2021, Limnology and Oceanography Methods (19) 8-20
Mangrove forests have adapted to sea level rise (SLR) increases by maintaining their forest floor elevation via belowground root growth and surface sediment deposits. Researchers use surface elevation tables (SETs) to monitor surface elevation change (SEC) in mangrove forests, after which this information is used to...
A case study of sea lamprey (Petromyzon marinus) control and ecology in a microcosm of the Great Lakes
Nicholas S. Johnson, Aaron K. Jubar, David A Keffer, Peter J. Hrodey, Gale Bravener, Lauren E Freitas, Jesse T McCarter, Michael J. Siefkes
2021, Journal of Great Lakes Research (47) S492-S505
The Cheboygan River, Michigan, is the only tributary to the upper Great Lakes where sea lamprey (Petromyzon marinus) are known to complete their entire life cycle. The Upper and Lower reaches are separated by the Cheboygan Lock and Dam located about...
Resistance and resilience of pelagic and littoral fishes to drought in the San Francisco Estuary
Brian Mahardja, Vanessa Tobias, Shruti Khanna, Lara Mitchell, Peggy W. Lehman, Ted Sommer, Larry R. Brown, Steven Culberson, Louise Conrad
2021, Ecological Applications (31)
Many estuarine ecosystems and the fish communities that inhabit them have undergone substantial changes in the past several decades, largely due to multiple interacting stressors that are often of anthropogenic origin. Few are more impactful than droughts, which are predicted to increase in both frequency and...
The snag’s the limit: Habitat selection modeling for the western purple martin in a managed forest landscape
Lorelle M. Sherman, Joan Hagar
2021, Forest Ecology and Management (480)
The western purple martin (Progne subis arboricola), an avian insectivore, is a species of conservation concern throughout the Pacific Northwest. Compared to the well-studied eastern subspecies (Progne subis subis), little is known of the life history and biology of the western...
High frequency of lead exposure in the population of an endangered Australian top predator, the Tasmanian wedge-tailed eagle (Aquila audax fleayi)
James M. Pay, Todd E. Katzner, Clare E. Hawkins, Amelia J. Koch, Jason M. Wiersm, William E. Brown, Nick J. Mooney, Elissa Z. Cameron
2021, Environmental Toxicology and Chemistry (40) 219-230
Lead poisoning, mainly through incidental ingestion of lead ammunition in carcasses, is a threat to scavenging and predatory bird species worldwide. In Australia, shooting for animal control is widespread, and a range of native scavenging species are susceptible to lead exposure. However, the prevalence of lead exposure in Australia's scavenging...
Relative abundance of coyotes (Canis latrans) influences gray fox (Urocyon cinereoargenteus) occupancy across the eastern United States
Michael E. Egan, Casey C. Day, Todd E. Katzner, Patrick A. Zollner
2021, Canadian Journal of Zoology (99) 63-72
Gray fox (Urocyon cinereoargenteus (Schreber, 1775)) populations in portions of the eastern United States have experienced declines whose trajectories differ from those of other mesocarnivore populations. One hypothesis is that gray fox declines may result from interspecific interactions, particularly competition with abundant coyotes (Canis latrans Say, 1823). Alternatively, gray foxes may respond...
Multiple physical properties of gas hydrate-bearing sediments recovered from Alaska North Slope 2018 Hydrate-01 Stratigraphic Test Well
Jun Yoneda, Yusuke Jin, Michihiro Muraoka, Motoi Oshima, Kiyofumi Suzuki, Mike Walker, Donald Westacott, Satoshi Otsuki, Kenichi Kumagai, Timothy Collett, Ray Boswell, Norihiro Okinaka
2021, Journal of Marine and Petroleum Geology (123)
Knowledge of the petrophysical and geomechanical properties of gas hydrate-bearing sediments is essential for predicting reservoir responses to gas production from gas hydrate reservoirs. In December 2018, Stratigraphic Test Well Hydrate-01 was drilled in the western part of the Prudhoe Bay...
Pheromone pollution from invasive sea lamprey misguides a native confamilial
Tyler John Buchinger, Skye D. Fissette, Belinda Huerta, Ke Li, Nicholas S. Johnson, Weiming Li
2021, Current Zoology (67) 333-335
Animals living in the Anthropocene search for mates facing a barrage of pollutants. Few studies consider pheromones from invasive species as pollution, but their central role in the lives of many animals indicates cross-reaction among historically allopatric relatives has potentially damaging impacts. We hypothesized the sex pheromone of sea...
Socio-technical scales in socio-environmental modeling: Managing a system-of-systems modeling approach
Takuya Iwanaga, Hsiao-Hsuan Wang, Serena Hamilton, Volker Grimm, Tomasz Koralewski, Alejandro Salado, Sondoss Elsawah, Saman Razavi, Jing Yang, Pierre D. Glynn, Jennifer Badham, Alexey Voinov, Mingshu Chen, William Grant, Tarla Peterson, Karin Frank, Gary W. Shenk, C. Michael Barton, Anthony J. Jakeman, John C. Little
2021, Environmental Modelling and Software (135)
System-of-systems approaches for integrated assessments have become prevalent in recent years. Such approaches integrate a variety of models from different disciplines and modeling paradigms to represent a socio-environmental (or social-ecological) system aiming to holistically inform policy and decision-making processes. Central...
Material failure and caldera collapse: Insights from the 2018 Kilauea eruption
Gabrielle Tepp
2021, Earth and Planetary Science Letters (553)
The Failure Forecast Method (FFM) was introduced as an empirical model for forecasting catastrophic material failures related to natural hazards, such as landslides and volcanic eruptions, with mixed success. During the 2018 eruption of Kilauea volcano, Hawaii, the draining of the summit...
Tall building performance-based seismic design using SCEC broadband platform site-specific ground motion simulations
Kuanshi Zhong, Ting Lin, Greg Deierlein, Robert Graves, Fabio Silva, Nico Luco
2021, Earthquake Engineering and Structural Dynamics (50) 81-98
The scarcity of strong ground motion records presents a challenge for making reliable performance assessments of tall buildings whose seismic design is controlled by large-magnitude and close-distance earthquakes. This challenge can be addressed using broadband ground-motion simulation methods to generate records with site-specific characteristics of large-magnitude events. In this paper,...
