The Volcanic Hazard Maps Database: An initiative of the IAVCEI Commission on Volcanic Hazards and Risk
Sarah E. Ogburn, Danielle Charlton, Diana Norgaard, Heather M. Wright, Eliza S. Calder, Jan Lindsay, John W. Ewert, Shinji Takarada, Yasuhisa Tajima
2023, Journal of Applied Volcanology (12)
In this work we present the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI) Commission on Volcanic Hazards and Risk (CVHR) Volcanic Hazard Maps Database and the accompanying volcanichazardmaps.org website. Using input from a series of IAVCEI CVHR Working Group on Hazard...
Applications of nonergodic site response models to ShakeAlert case studies in the Los Angeles area
Rongrong Lin, Grace Alexandra Parker, Jeffrey McGuire, Annemarie S. Baltay
2023, Bulletin of the Seismological Society of America (113) 1324-1343
In this study, we explore whether the Parker and Baltay (2022) site response models for the Los Angeles (LA) basin region can improve ground‐motion forecasts in the U.S. Geological Survey ShakeAlert earthquake early warning system (hereafter ShakeAlert). We implement the peak ground acceleration and peak ground velocity site...
Colored shaded-relief bathymetric map and orthomosaic from structure-from-motion quantitative underwater imaging device with five cameras of the Lake Tahoe floor, California
Gerald A. Hatcher, Jonathan A. Warrick, Peter Dartnell
2023, Scientific Investigations Map 3501
This two-sheet publication displays a high-resolution colored shaded-relief bathymetric map (sheet 1) and orthomosaic (sheet 2) of part of the Lake Tahoe floor in California generated from a U.S. Geological Survey towed surface vehicle with multiple downward-looking underwater cameras. The system is named the Structure-from-Motion Quantitative Underwater Imaging Device with...
An evaluation of multistate occupancy models for estimating relative abundance and population trends
Valerie A. Steen, Adam Duarte, James Peterson
2023, Ecological Modelling (478)
Detecting spatiotemporal changes in the abundances of organisms is key to effectively conserving species. While indices of abundance have long been used, there has been a shift toward model-based estimators that account for the detection process. Popular approaches including traditional occupancy models and N-mixture models entail tradeoffs. The traditional occupancy...
Anthropogenic subsidies influence resource use during a mange epizootic in a desert coyote population
Craig D. Reddell, Gary W. Roemer, David K. Delaney, Talesha Karish, James W. Cain III
2023, Oecologia (201) 435-447
Colonization of urban areas by synanthropic wildlife introduces novel and complex alterations to established ecological processes, including the emergence and spread of infectious diseases. Aggregation at urban resources can increase disease transfer, with wide-ranging species potentially infecting outlying populations. The garrison at the National Training Center, Fort Irwin, California, USA,...
A review of common natural disasters as analogs for asteroid impact effects and cascading hazards
Timothy N. Titus, D. G. Robertson, Joel B. Sankey, Larry G. Mastin, Francis K. Rengers
2023, Natural Hazards (116) 1355-1402
Modern civilization has no collective experience with possible wide-ranging effects from a medium-sized asteroid impactor. Currently, modeling efforts that predict initial effects from a meteor impact or airburst provide needed information for initial preparation and evacuation plans, but longer-term cascading hazards are not typically considered. However, more common natural disasters,...
From bottom-up to top-down control of invertebrate herbivores in a retrogressive chronosequence
Anne Kempel, Eric Allan, Martin M. Gossner, Malte Jochum, James Grace, David A. Wardle
2023, Ecology Letters (26) 411-424
In the long-term absence of disturbance, ecosystems often enter a decline or retrogressive phase which leads to reductions in primary productivity, plant biomass, nutrient cycling and foliar quality. However, the consequences of ecosystem retrogression for higher trophic levels such as herbivores and predators, are less clear. Using a post-fire forested...
Six years of fluvial response to a large dam removal on the Carmel River, California, USA
Amy E. East, Lee R. Harrison, Douglas P. Smith, Joshua B. Logan, Rosealea Bond
2023, Earth Surface Processes and Landforms (48) 1487-1501
Measuring river response to dam removal affords a rare, important opportunity to study fluvial response to sediment pulses on a large field scale. We present a before–after/control–impact study of the Carmel River, California, measuring fluvial geomorphic and grain-size evolution over 8 years, six of which postdated removal of a 32 m-high...
Increasing Alaskan river discharge during the cold season is driven by recent warming
D Blaskey, Joshua C. Koch, M. Gooseff, A. C. Newman, Yang Cheng, Jonathan A. O'Donnell, K Musselman
2023, Environmental Research Letters (18)
Arctic hydrology is experiencing rapid changes including earlier snow melt, permafrost degradation, increasing active layer depth, and reduced river ice, all of which are expected to lead to changes in stream flow regimes. Recently, long-term (>60 years) climate reanalysis and river discharge observation data have become available....
Upwelling, climate change, and the shifting geography of coral reef development
Victor Rodriguez-Ruano, Lauren Toth, Ian C. Enochs, Carly J. Randall, Richard B. Aronson
2023, Scientific Reports (13)
The eastern tropical Pacific is oceanographically unfavorable for coral-reef development. Nevertheless, reefs have persisted there for the last 7000 years. Rates of vertical accretion during the Holocene have been similar in the strong-upwelling Gulf of Panamá (GoP) and the adjacent, weak-upwelling Gulf of Chiriquí (GoC); however, seasonal...
Detection and monitoring of small-scale diamond and gold mining dredges using synthetic aperture radar on the Kadéï (Sangha) River, Central African Republic
Marissa Ann Alessi, Peter G. Chirico, Sindhuja Sunder, Kelsey L. O'Pry
2023, Remote Sensing (15)
Diamond and gold mining has been practiced by artisanal miners in the Central African Republic (CAR) for decades. The recent introduction of riverine dredges indicates a transition from artisanal/manual digging and sorting techniques to small-scale mining methods. This study implements a remote sensing analysis of Synthetic Aperture Radar (SAR)...
Stabilising effects of karstic groundwater on stream fish communities
Nathaniel Hitt, Karli M Rogers, Karmann G. Kessler, Martin Briggs, Jennifer Burlingame Hoyle Fair
2023, Ecology of Freshwater Fish (32) 538-551
Although groundwater exchange processes are known to modulate atmospheric influences on stream temperature and flow, the implications for ecological stability are poorly understood. Here, we evaluated temporal change in stream fish communities across a gradient of groundwater influence defined by karst terrain (carbonate parent materials) within...
Sierra Nevada amphibians demonstrate stable occupancy despite precipitation volatility in the early 21st Century
Brian J. Halstead, Patrick M. Kleeman, Jonathan P. Rose, Gary M. Fellers
2023, Frontiers in Ecology and Evolution (10)
Climate can have a strong influence on species distributions, and amphibians with different life histories might be affected by annual variability in precipitation in different ways. The Sierra Nevada of California, United States, experienced some of the driest and wettest years on record in the early 21st Century, with...
When less is more: How increasing the complexity of machine learning strategies for geothermal energy assessments may not lead toward better estimates
Stanley Paul Mordensky, John Lipor, Jacob DeAngelo, Erick R. Burns, Cary Ruth Lindsey
2023, Geothermics (110)
Previous moderate- and high-temperature geothermal resource assessments of the western United States utilized data-driven methods and expert decisions to estimate resource favorability. Although expert decisions can add confidence to the modeling process by ensuring reasonable models are employed, expert decisions also introduce human and, thereby, model bias. This bias...
Regolith of the crater floor units, Jezero crater, Mars: Textures, composition and implications for provenance
Alicia Vaughan, Michelle E. Minitti, Emily L. Cardarelli, Jeffrey R. Johnson, Linda C. Kah, Paolo Pilleri, Mellisa S. Rice, Mark Sephton, Briony H. N. Horgan, Roger C. Wiens, R. Aileen Yingst, Maria-Paz Zorzano Mier, Ryan Anderson, James F. III Bell, Adrian J. Brown, Edward A. Cloutis, Agnes Cousin, Kenneth E. Herkenhoff, Elisabeth M. Housrath, Alexander G. Hayes, Kjartan M. Kinch, Marco Merusi, Chase C. Million, Robert Sullivan, Sandra M. Siljestrom, Michael St. Clair
2023, JGR-Planets (128)
A multi-instrument study of the regolith of Jezero crater floor units by the Perseverance rover has identified three types of regolith: fine-grained, coarse-grained, and mixed-type. Mastcam-Z, WATSON, and SuperCam RMI were used to characterize regolith texture, particle size, and roundedness where possible. Mastcam-Z multispectral and SuperCam LIBS...
Groundwater quality near the Montebello Oil Field, Los Angeles County, California
Jennifer S. Stanton, Michael Land, Matthew K. Landon, David H. Shimabukuro, Peter B. McMahon, Tracy A. Davis, Andrew G. Hunt, Theron A. Sowers
2023, Scientific Investigations Report 2022-5128
Groundwater quality and potential sources and migration pathways of chemical constituents associated with hydrocarbon-bearing formations were assessed by the U.S. Geological Survey for the California State Water Resources Control Board Oil and Gas Regional Monitoring Program (RMP). Groundwater samples were collected as part of the RMP from 21 preexisting wells...
Ice and ocean constraints on early human migrations into North America along the Pacific Coast
Summer K. Praetorius, Jay R. Alder, Alan Condron, Alan Mix, Maureen Walczak, Beth Elaine Caissie, Jon Erlandson
2023, Proceedings of the National Academy of Sciences (120)
Founding populations of the first Americans likely occupied parts of Beringia during the Last Glacial Maximum (LGM). The timing, pathways, and modes of their southward transit remain unknown, but blockage of the interior route by North American ice sheets between ~26 and 14 cal kyr BP (ka) favors a coastal...
Do nurse plant effects strengthen over time? Results from 12 years of desert habitat restoration
Scott R. Abella, Lindsay P. Chiquoine, Mary A. Balogh, Adam J. Taylor, Seth M. Munson
2023, Plant Ecology (224) 299-314
Nurse plant effects occur when benefactor perennials facilitate beneficiary plants below their canopies. Two poorly understood aspects of nurse plant ecology include whether facilitation strengthens as nurse plants mature and whether reestablishing perennials through ecological restoration at disturbed sites can trigger facilitation akin to in natural...
Integrating urban water fluxes and moving beyond impervious surface cover: A review
Claire Oswald, Christa Kelleher, Sarah Ledford, Kristina G. Hopkins, Anneliese Sytsma, Doerthe Tetzlaff, Laura Toran, Carolyn Voter
2023, Journal of Hydrology (618)
Though urban areas represent a small fraction of global land cover, they have an outsized impact on hydrological processes. Within these areas, the pathways that water follows are fundamentally transformed by the disturbance of soils, land cover, vegetation, topography, and built infrastructure. While progress has...
Dynamics of the wave-driven circulation in the lee of nearshore reefs
Renan F. da Silva, Jeff Hansen, Ryan Lowe, Dirk P. Rijnsdorp, Mark L. Buckley
2023, JGR-Oceans (128)
Nearshore rocky reefs with scales of order 10–100 m are common along the world's coastline and often shape wave-driven hydrodynamics and shoreline morphology in their lee. The interaction of waves with these reefs generally results in either two or four-cell mean circulation systems (2CC and 4CC, respectively), with...
Hawai‘i residents’ perceptions of Kīlauea’s 2018 eruption information
Robert T. Goldman, Wendy K. Stovall, David Damby, Sara McBride
2023, Volcanica (6) 19-43
The 2018 eruption of Kīlauea Volcano was notable for its variety of large and spatially distinct hazards, simultaneously affecting three geographically disparate, culturally diverse regions in Hawaiʻi. We conducted a pilot study, consisting of 18 semi-structured interviews, two survey responses, and several informal conversations with Hawaiʻi residents...
Prevalence of neonicotinoid insecticides in paired private-well tap water and human urine samples in a region of intense agriculture overlying vulnerable aquifers in eastern Iowa
D.A. Thompson, Dana W. Kolpin, Michelle L. Hladik, H-J. Lehmler, Shannon M. Meppelink, M.C. Poch, J.D. Vargo, V.A. Soupene, N.M. Irfan, M. S. Robinson, K. Kannan, L.E. Beane Freeman, J.N. Hogmann, D.M. Cwiertny, R.W. Field
2023, Chemosphere (319)
A pilot study among farming households in eastern Iowa was conducted to assess human exposure to neonicotinoids (NEOs). The study was in a region with intense crop and livestock production and where groundwater is vulnerable to surface-applied contaminants. In addition to paired outdoor (hydrant)...
A restructured Bayesian approach to estimate the abundance of a rare and invasive fish
Ana R. Gouveia, S. S. Qian, C. A. Mayer, J. A. Smith, J. Bossenbroek, W. D. Hintz, R. Mapes, E. Weimer, J. Navarro, J. M. Dettmers, R. Young, J. T. Buszkiewicz, Patrick M. Kočovský
2023, Biological Invasions (25) 1711-1721
Quantifying invasive species abundance informs management and control strategies. However, estimating abundance can be challenging, particularly when dealing with rare species early in the invasion process. Data generated from control strategies, such as removing invasive species, are usually not suited to conventional statistical modelling approaches....
United States Gulf of Mexico waters provide important nursery habitat for Mexico’s green turtle nesting populations
Brian M. Shamblin, Kristen Hart, Margaret Lamont, Donna J. Shaver, Peter H. Dutton, Erin L. LaCasella, Campbell J. Nairn
Jeremy J. Kiszka, editor(s)
2023, Frontiers in Marine Science (9)
Resolving natal populations for juvenile green turtles is challenging given their potential for extensive dispersal during the oceanic stage and ontogenetic shifts among nursery habitats. Mitochondrial DNA markers have elucidated patterns of connectivity between green turtle nesting populations (rookeries) and juvenile foraging aggregations. However, missing rookery baseline data and haplotype...
Ecotoxicological studies indicate that sublethal and lethal processes limit insect-mediated contaminant flux
C.I Olson, G.B Beaubien, R.R Otter, David Walters, Mills. M.A
2023, Environmental Toxicology and Chemistry (42) 1982-1992
Merolimnic insects can accumulate and transport considerable amounts of aquatic contaminants to terrestrial systems. The rate of contaminant biotransport, termed insect-mediated contaminant flux (IMCF), depends on emergent insect biomass and contaminant accumulation, both functions of environmental concentration. Here we develop a mathematical model of IMCF and apply it to three...
