New U-Pb geochronology and geochemistry of Paleozoic metaigneous rocks from western Yukon and eastern Alaska, cross-border synthesis, and implications for tectonic models
Cynthia Dusel-Bacon, James K. Mortensen
2024, Professional Paper 1888
The tectonic evolution of and relation between the Yukon-Tanana terrane and the Lake George assemblage, as well as other associated tectonic assemblages in western Yukon and eastern Alaska, have been debated for decades. The Yukon-Tanana terrane is widely considered to be an allochthonous rifted fragment derived from the Laurentian continental...
Predicting future grizzly bear habitat use in the Bitterroot Ecosystem under recolonization and reintroduction scenarios
Sarah Nelson Sells, Cecily M. Costello
2024, PLoS ONE (19)
Many conservation actions must be implemented with limited data. This is especially true when planning recovery efforts for extirpated populations, such as grizzly bears (Ursus arctos) within the Bitterroot Ecosystem (BE), where strategies for reestablishing a resident population are being evaluated. Here, we applied individual-based movement...
Classifying plant communities in the North American Coastal Plain with PRISMA spaceborne hyperspectral imagery and the spectral mixture residual
Jennifer A. Rogers, Kevin M. Robertson, Todd Hawbaker, Daniel J. Sousa
2024, JGR Biogeosciences (129)
The effort to map terrestrial biodiversity, in recent years limited mostly to the use of broadband multispectral remote sensing at decameter scales, can be greatly enhanced by harnessing hyperspectral imagery. Interpretation of hyperspectral imagery may be aided by the Mixture Residual (MR) spectral preprocessing transformation. MR integrates the benefits of...
Modeling regional occupancy of fishes using acoustic telemetry: A model comparison framework applied to lake trout
Matthew H. Futia, Thomas R. Binder, Mark J. Henderson, J. Ellen Marsden
2024, Animal Biotelemetry (12)
Acoustic telemetry is a common tool used in fisheries management to estimate fish space use (i.e., occupancy) from a local habitat scale to entire systems. Numerous analytical models have been developed to estimate different aspects of fish movement from telemetry datasets, yet evaluations of model performance and comparisons among models...
Ranking of 10 global one-arc-second DEMs reveals limitations in terrain morphology representation
Peter L. Guth, Sebastiano Trevisani, Carlos H. Grohmann, John Lindsay, Dean B. Gesch, Laurence Hawker, Conrad Bielski
2024, Remote Sensing (16)
At least 10 global digital elevation models (DEMs) at one-arc-second resolution now cover Earth. Comparing derived grids, like slope or curvature, preserves surface spatial relationships, and can be more important than just elevation values. Such comparisons provide more nuanced DEM rankings than just elevation root mean square error (RMSE)...
Challenging ring-current models of the Carrington storm
Jeffrey J. Love, Kalevi Mursula
2024, Journal of Geophysical Research Space Physics (129)
A detailed analysis is made of horizontal-component geomagnetic-disturbance data acquired at the Colaba observatory in India recording the Carrington magnetic storm of September 1859. Prior to attaining its maximum absolute value, disturbance at Colaba increased with an e-folding timescale of 0.46 hr (28 min). Following its maximum, absolute disturbance at...
Predicting the persistence of salamanders: consequences of phenological shifts for species of management concern on DoD lands
Susan Walls, Thomas L. Anderson, Houston C. Chandler, Carola A. Haas, Jon M. Davenport
2024, Report
As climate change effects intensify, key life history events may become decoupled from necessary biotic and abiotic resources. For species of management concern on Department of Defense (DoD) lands, these shifts in phenology may prove difficult to address without a mechanistic understanding of the drivers of such changes. We sought...
Recognition of artificial gases formed during drill-bit metamorphism using advanced mud gas
Janaina A. de Lima Leon, Henrique Luiz de Barros Penteado, Geoffrey S. Ellis, Alexei V. Milkov, João Graciano Mendonça Filho
2024, Energies (17)
Drill-bit metamorphism (DBM) is the process of thermal degradation of drilling fluid at the interface of the bit and rock due to the overheating of the bit. The heat generated by the drill when drilling into a rock formation promotes the generation of artificial hydrocarbon and non-hydrocarbon gas, changing the...
Insights on gas hydrate formation and growth within an interbedded sand reservoir from well logging at the Qiongdongnan Basin, South China Sea
Dongju Kang, Zijian Zhang, Jing’an Lu, Stephen C. Phillips, Jinqiang Liang, Wei Deng, Chao Zhong, Dajiang Meng
2024, Marine Geology (475)
Although variable well log resolution and its control on saturation estimation has been studied, it has not been directly applied to a specific location to explore the nature of gas hydrate within a sand reservoir. We applied in-situ measurements of resistivities, neutron porosity, and gamma ray at two sites in...
2023-2024 Coastal sage scrub and chaparral community monitoring for western San Diego County
Emily E. Perkins, Philip Robert Gould, Jennifer Kingston, Christopher W. Brown, Kristine L. Preston, Robert N. Fisher
2024, Report
Western San Diego County is dominated by shrublands supporting biologically diverse native plant and animal communities. Widespread urbanization has led to regional habitat loss and fragmentation, and many species in these shrubland communities are rare, threatened, or endangered. Large-scale, multiple-species conservation planning has resulted in a regional preserve system that...
Application of non-stationary shear-wave velocity randomization approach to predict 1D seismic site response and its variability at two downhole array recordings
Eliane Youssef, Cecile Cornou, Dalia Youssef Abdel Massih, Tamara Al-Bittar, Alan Yong, Fabrice Hollender
2024, Soil Dynamics and Earthquake Engineering (106)
Accounting for uncertainties in seismic site response is crucial to improving the performance of one-dimensional (1D) ground response analyses (GRAs) at downhole array recording sites. In addition to site effects, uncertainties in 1D-GRAs can also be contributed from the seismic source and/or path. Though often representing not more than one...
Scale‐dependent population drivers inform avian management in a declining saline lake ecosystem
Aimee M. Van Tatenhove, John Neill, Russell E. Norvell, Erica Francis Stuber, Clark S. Rushing
2024, Ecological Applications (34)
Shrinking saline lakes provide irreplaceable habitat for waterbird species globally. Disentangling the effects of wetland habitat loss from other drivers of waterbird population dynamics is critical for protecting these species in the face of unprecedented changes to saline lake ecosystems, ideally through decision-making frameworks that identify effective management options and...
Learning from a high-severity fire event—Conditions following the 2018 Carr Fire at Whiskeytown National Recreation Area
Phillip J. van Mantgem, Micah C. Wright, Karen M. Thorne, Jill Beckmann, Kevin J. Buffington, Lyndsay L. Rankin, Audrey Colley, Eamon A. Engber
2024, Open-File Report 2023-1053
The 2018 Carr Fire burned more than 90 percent of Whiskeytown National Recreation Area, with much of the park burning at high severity. California yellow pine and mixed conifer forests are not well adapted to large, high-severity fires, and forest recovery after these events may be problematic. Large, high-severity fire...
June 2022 floods in the Upper Yellowstone River Basin
Katherine J. Chase, DeAnn Dutton, William B. Hamilton, Seth A. Siefken, Cassidy Vander Voort, Aroscott Whiteman
2024, Fact Sheet 2024-3035
Extraordinary floods surged down the Yellowstone River and its tributaries in northwestern Wyoming and south-central Montana on June 13–15, 2022. During the flood, U.S. Geological Survey staff worked to maintain real-time data from streamgages by making field measurements of streamflow and repairing damaged equipment while communicating the latest streamflow information...
Numerical modeling of circulation and wave dynamics along the shoreline of Shinnecock Indian Nation in Long Island, New York
Ling Zhu, Hongqing Wang, Qin Chen, William Capurso, Michael Noll
2024, Open-File Report 2024-1050
The Shinnecock Indian Nation on Long Island, New York, faces challenges of shoreline retreat, saltwater intrusion, and flooding of the Tribal lands under changing climate and rising sea level. However, understanding of the dynamics of tidal circulation and waves and their impacts on the Shinnecock Indian Nation’s shoreline remains limited....
Estimated reductions in phosphorus loads from removal of leaf litter in the Lake Champlain drainage area, Vermont
Jason R. Sorenson, James M. Pease, Jeremy K. Foote, Ann T. Chalmers, David H. Ainley, Clayton J. Williams
2024, Scientific Investigations Report 2023-5104
Excess nutrient loading and other factors are driving eutrophication and other negative effects on water-quality conditions in Lake Champlain and other receiving waters in Vermont. Two common best management practices were evaluated to determine how these practices can be optimized by targeting maintenance and operation to align better with seasonally...
U.S. Geological Survey Mississippi River Science Forum—Summary of data and science needs and next steps
John C. Nelson, Richard A. Rebich, Kathi Jo Jankowski, Thea M. Edwards, James H. Larson, Dale M. Robertson, Lori A. Sprague, Sarah M. Stackpoole, Katherine M. Summers, Peter J. Cinotto, Paul H. Rydlund Jr., Christopher J. Churchill, Wesley M. Daniel, Owen P. McKenna, Beth A. Middleton, Jacoby Carter, Stephen B. Hartley, Jeffrey W. Frey, Kelly L. Warner
2024, Open-File Report 2024-1053
The U.S. Geological Survey hosted a Mississippi River Science Forum with Federal agencies; Tribal, State, and local governments located in States that border the Mississippi River; academia; and other interested stakeholders. The purpose of the forum was to share current (2023) science; identify data gaps and areas of concern; and...
Substrate Enhancement Pilot Project—Monitoring summary and evaluation, Kootenai River, Idaho, 2012–22
Taylor J. Dudunake
2024, Scientific Investigations Report 2024-5070
To assess changes in substrate conditions and the efficacy of artificially placed substrates at select sites on the Kootenai River near Bonners Ferry, Idaho, the U.S. Geological Survey, in cooperation with the Kootenai Tribe of Idaho, completed repeat bathymetric, velocimetric, and underwater videography surveys. Collectively, three project sites throughout the...
Bayesian approaches to proxy uncertainty quantification in paleoecology: A mathematical justification and practical integration
Marco A. Aquino-Lopez, Lysanna Anderson, Joan-Albert Sanchez-Cabeza, Ana Carolina Ruiz-Fernandez, J. Andres Christen
2024, Journal of Agricultural, Biological and Environmental Statistics (31) 162-175
Paleoenvironmental data are essential for reconstructing environmental conditions in the distant past, and these reconstructions strongly depend on proxies and age–depth models. Proxies are indirect measurements that substitute for variables that cannot be directly measured, such as past precipitation. Conversely, an age–depth model is a tool that correlates the observed...
Methane emissions associated with bald cypress knees across the Mississippi River Alluvial Valley
Melinda Martinez, Robert Bordelon, Beth A. Middleton, Jorge A. Villa, Hojeong Kang, Inyoung Jang
2024, Wetlands (44)
In freshwater forested wetlands, bald cypress knees (Taxodium distichum (L.) Rich.) have the potential to emit large amounts of methane (CH4), but only a few studies have examined their greenhouse gas contribution. In this study, we measured CH4 fluxes associated with cypress knees across various climate and flooding...
Wave runup and total water level observations from time series imagery at several sites with varying nearshore morphologies
Mark L. Buckley, Daniel Buscombe, Justin J. Birchler, Margaret L. Palmsten, Eric Swanson, Jenna A. Brown, Michael Itzkin, Curt D. Storlazzi, Shawn R. Harrison
2024, Coastal Engineering (193)
Coastal imaging systems have been developed to measure wave runup and total water level (TWL) at the shoreline, which is a key metric for assessing coastal flooding and erosion. However, extracting quantitative measurements from coastal images has typically been done...
Water-level changes impact angler effort in a large lake: Implications for climate change
Matthew L. Maldonado, Taufique H. Mahmood, David P. Coulter, Alison A. Coulter, Steven R. Chipps, Maddy K. Siller, Michaela L. Neal, Ayon Saha, Mark A. Kaemingk
2024, Fisheries Research (279)
Climate change is expected to influence aquatic habitats and associated fish populations, yet we know little about the impact on recreational anglers. Our goal was to explore whether interannual fluctuations in waterbody surface area and other explanatory variables could be used as indicators of changes in angler fishing effort. Our...
Evidence for recruitment-mediated decline in an Eastern box turtle (Terrapene carolina carolina) population based on a 30-year capture-recapture data set from Maryland
J. Andrew Royle, Mike Quinlan, Christopher Swarth
2024, Preprint
The Eastern box turtle (Terrapene carolina carolina) population at the Jug Bay Wetlands Sanctuary, Lothian, MD has been monitored continuously for 29 years (1995-2023). We used open population capture-recapture models (Jolly-Seber) to estimate annual population size, survival probability, and recruitment rate. The model allows for unknown sex of individuals and...
From field station to forecast: Managing data at the Alaska Volcano Observatory
Michelle L. Coombs, Cheryl Cameron, Hannah R. Dietterich, Eleanor Boyce, Aaron Wech, Ronni Grapenthin, Kristi L. Wallace, Thomas Parker, Taryn Lopez, Scott Crass, David Fee, Matthew M. Haney, Dane M. Ketner, Matthew W. Loewen, John J. Lyons, Jenny Sha Nakai, John Power, Steven M Botnick, Israel Brewster, Max L. Enders, Dain Harmon, Peter J. Kelly, Michael J. Randall
2024, Bulletin of Volcanology (86)
The Alaska Volcano Observatory (AVO) uses multidisciplinary data to monitor and study dozens of active and potentially active volcanoes. Here, we provide an overview of internally and externally generated data types, tools and resources used in their management, and challenges faced. Data sources include the following: (1) a multiparameter (seismic,...
Dynamic occupancy modelling of Asian elephants (Elephas maximus) reveals increasing landscape use in Nepal
Ashok Kumar Ram, Babu Ram Lamichhane, Naresh Subedi, Nabin Kumar Yadav, Ajay Karki, Bivash Pandav, Cory Brown, Top B. Khatri, Charles B. Yackulic
2024, Scientific Reports (14)
Large mammals with general habitat needs can persist throughout mixed used landscapes, however, human-wildlife conflict frequently leads to their restriction to protected areas. Conservation efforts, especially for reducing conflicts with humans, can enhance tolerance of humans towards species like Asian elephants (Elephas maximus) in human-dominated landscapes. Here, we examine how...
