Rapid seismic and infrasound assessment of large landslides: A case study from Denali National Park and Preserve (Alaska)
Liam Toney, Michael E. West, Ezgi Karasözen, Denny M Capps, Elaine A. Collins, Kate E. Allstadt, Jana Pursley, Heather McFarlin, Anne Mangeney, David Fee, Dennis M. Staley, Matthew M. Haney, John J. Lyons, John Bellini
2026, Journal of Geophysical Research: Earth Surface (131)
Large, rapid landslides are a global hazard that can occur in remote, mountainous areas. Eyewitness reports of landslides and satellite imagery can often be limited or delayed, particularly during inclement weather. However, landslide-generated seismic and infrasound (low-frequency atmospheric sound) waves can be remotely detected in near real-time. This information can...
The collective application of shorebird tracking data to conservation
Autumn-Lynn Harrison, Candace Stenzel, Alexandra Anderson, Jessica Howell, Richard B. Lanctot, Marley Aikens, Joaquín Aldabe, Liam A. Berigan, Joël Bêty, Erik Blomberg, Juliana Bosi de Almeida, Andy J. Boyce, David W. Bradley, Stephen C. Brown, Jay D. Carlisle, Edward Cheskey, Katherine Christie, Sylvain Christin, Rob Clay, Ashley A. Dayer, Jill L. Deppe, Willow B. English, Scott A. Flemming, Olivier Gilg, Christine Gilroy, Susan Heath, Jason M. Hill, J. Mark Hipfner, James A. Johnson, Luanne Johnson, Bart Kempenaers, Paul Knaga, Eunbi Kwon, Benjamin J. Lagassé, Jean-François Lamarre, Christopher Latty, Don-Jean Léandri-Breton, Nicolas Lecomte, Pam Loring, Laura Anne McDuffie, Rebecca L McGuire, Scott Moorhead, Juan G. Navedo, David Newstead, Erica Nol, Alina Olalla-Kerstupp, Bridget Olson, Elizabeth Olson, Julie Paquet, Allison K. Pierce, Jennie Rausch, Kevin Regan, Matthew E. Reiter, Amber M. Roth, Mike Russell, Daniel R. Ruthrauff, Sarah T. Saalfeld, Amy L. Scarpignato, Shiloh Schulte, Nathan R. Senner, Joseph A.M. Smith, Paul A. Smith, Zach Spector, Kelly Srigley Werner, Michelle L. Stantial, Audrey R. Taylor, T. Lee Tibbitts, Mihai Valcu, Nils Warnock, Walter Wehtje, Brad Winn, Michael B. Wunder
2026, Conservation Biology
Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence-based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership...
Intertidal community responses to perturbations along Alaska park coastlines
Sarah Beth Traiger, Brenda Ballachey, Heather Coletti, Daniel Esler
2026, Alaska Park Science (24) 72-79
Nearshore ecosystems are highly productive zones with strong connections to both terrestrial and open ocean ecosystems. The rocky intertidal is a highly dynamic ecosystem and changes over a variety of spatial and temporal scales depending on the factors contributing to the change. Here we summarize how nearshore communities and species responded to several perturbations...
Investigating the role of lake environments and food chains on the transfer of mercury to lake trout
Sarah M. Laske, Krista K. Bartz, Daniel Young
2026, Alaska Park Science (24) 46-55
Mercury contamination can pose threats to fish, wildlife, and people. Methylmercury, found in fish, can be particularly detrimental, especially to children. This study explores the sources and concentrations of mercury and proposes how people can become aware and limit their exposure....
Glaciers in Alaska and western North America
Caitlyn Florentine
Scott A. Elias, Richard Kelly, editor(s)
2026, Book chapter, Comprehensive cryospheric science and environmental change
This chapter summarizes the location, status, and projections of glaciers in Alaska and western North America. Recent events, including the 2021 surge of Muldrow Glacier in Denali National Park and Preserve, Alaska, are summarized. The implications of glacier loss...
Brewing change in the (glacier) percolation zone
Louis Sass, Christopher McNeil, Emily A. Baker, Zanden Arthur Frederick, Michael Loso
2026, Alaska Park Science (24) 2-15
Alaska's glaciers are losing mass at the fastest rate of any region globally, significantly affecting both the volume and distribution of water across the landscape. Though glaciers in the Alaska region (as defined by glaciologists this includes both Alaska and portions of adjacent Canada) range from sea level to nearly...
Understanding flooding and channel dynamics along the Taiya River: Providing context for resource management
Janet H. Curran
2026, Alaska Park Science (24) 26-35
Flooding and channel change in the Taiya River Basin in recent decades have directly affected park infrastructure and cultural resources. The complexities of flooding and channel change are compounded by the changing sediment and flow regime from a changing climate and shrinking glaciers, which will continue to drive dynamic riverine change. Streamflow...
Exploring how Dolly Varden in Arctic streams respond to changes from permafrost thaw
Michael P. Carey, Jonathan A. O’Donnell, Joshua C. Koch, Kenneth Hill, Brett Poulin
2026, Alaska Park Science (24) 64-71
The influence of permafrost thaw on aquatic ecosystems is complex. Carbon, nutrients, and metals in stream discharge result in changing stream color, chemistry, and temperature. These different processes create a mosaic of spatially and temporally dynamic disturbances across the landscape with complex effects on the ecology. ...
Living with wildfire in Nikiski, Kenai Peninsula Borough, Alaska: 2023 Data report
Colleen Donovan, Suzanne Wittenbrink, Hannah Brenkert-Smith, Josh Kuehn, Brenda Ahlberg, Patricia A. Champ, Christopher M. Barth, James R. Meldrum, Carolyn Wagner, Christine Taniguchi
2026, Research Note RMRS-RN-110
Homeowner wildfire risk mitigation and preparedness are important components of community wildfire readiness. This report describes the data collected through two efforts conducted in the Nikiski, Alaska, study area: (1) parcel-level rapid wildfire risk assessments performed by trained assessors and (2) homeowner surveys in which respondents provided self-assessments of their...
Breeding shorebird surveys in the Arctic National Wildlife Refuge, Alaska, suggest population declines over two decades for most species
Stephen C. Brown, James E. Lyons, Sarah T. Saalfeld, Shiloh Schulte, Christopher J. Latty, Metta McGarvey, Lindall R. Kidd, Kirsti L.K. Carr, Richard B. Lanctot
2026, Ornithological Applications
Shorebird populations are declining globally but it generally remains unclear how those declines translate to changes at the regional scale. We conducted the first longitudinal surveys of breeding shorebirds in Alaska under the Program for Regional and International Shorebird Monitoring (PRISM), resurveying the Coastal Plain (1002 Area)...
Shifting winter atmospheric teleconnections to the North Pacific reconcile Younger-Dryas and Holocene δ18O signals
Lesleigh Anderson, Bruce P. Finney, W. Brad Baxter
2026, Nature Communications (17)
Using Alaskan lake sediment oxygen isotope records (δ18O), which trace the δ18O of precipitation, we establish that abrupt atmospheric shifts occurred during the last deglacial period in the North Pacific-Arctic. The robust lake δ18O chronologies confidently correlate Younger-Dryas (YD) atmospheric adjustments in Alaska with Greenland ice-core records and their seasonal...
Migration water temperature and heat stress assessments in western Alaska Chinook salmon overlapping the 2019 heatwave
Vanessa R. von Biela, Amy M. Regish, Stephen D. McCormick, Joseph Spaeder, Kevin Whitworth, Justin Leon, Daniel Gillikin, Zachary Liller, Renae Ivanoff, Jenefer Bell, Sean D. Larson, Michael P. Carey, Christian E. Zimmerman
2026, Canadian Journal of Fisheries and Aquatic Sciences
Chinook salmon population declines span their geographic range with climate hypothesized as a major driver. Concerns of warming freshwater temperatures in their northern range gained urgency during 2019 when a heatwave coincided with premature mortality. This study examined heat stress during the 2019 heatwave compared to subsequent years and described...
Earthquake catalog for the Fairbanks region of central Alaska, 2014–2024, based on waveform cross-correlation
Nealey E. Sims, Carl Tape, Natalia A. Ruppert, Michael E. West
2026, Seismological Research Letters (97) 877-896
The Fairbanks region of central Alaska is part of a broad zone of intraplate crustal deformation, situated north of the Denali fault and north of the ongoing collision and flat‐slab subduction of the Yakutat oceanic plateau. Seismicity in the Fairbanks region occurs both in diffuse areas as well as in...
Living with wildfire in Funny River, Alaska: 2023 Data report
Colleen Donovan, Suzanne Wittenbrink, Hannah Brenkert-Smith, Josh Kuehn, Paul McBride, Patricia A. Champ, Christopher M. Barth, James R. Meldrum, Carolyn Wagner, Christine Taniguchi
2026, Research Note RMRS-RN-109
Homeowner wildfire risk mitigation and preparedness are important components of community wildfire readiness. This report describes the data collected through two efforts conducted in the Funny River, Alaska, study area: (1) parcel-level rapid wildfire risk assessments performed by trained assessors and (2) homeowner surveys in which respondents provided self-assessments of...
Earthquake-hazard exposure of residents with potential access and functional needs in the United States
Nathan J. Wood, Alice Pennaz, Jeanne M. Jones
2026, International Journal of Disaster Risk Reduction (134)
Earthquake response plans and earthquake early warning (EEW) systems designed for general populations may not consider potential access and functional needs (AFN) of individuals with physical, sensory, cognitive, or social limitations. Previous efforts to map the distribution of these populations have focused on social-vulnerability indices that ignore or oversimply these...
An energetic tradeoff best explains parturition timing in grizzly bears
C. M. Costello, L. L. Roberts, D. D. Bjornlie, M. D. Cameron, J. G. Clapp, Mark Haroldson, G. V. Hilderbrand, K. Joly, W. Kasworm, J. M. Nicholson, T. Radandt, M. S. Sorum, J. E. Teisberg, Frank T. van Manen, M. A. Vinks
2026, Ecology and Evolution (16)
Timing of grizzly bear (Ursus arctos) parturition during hibernation has been explained by ancestral traits (delayed implantation, altricial young, obligate maternal denning), but the ultimate driver underlying precise timing has not been fully explored. Capitalizing on an observed latitudinal increase in denning duration among four populations in interior North America,...
Harmonization of aggregated freshwater biotic data to support continental and global assessment
Jennifer Lento, Sarah M. Laske, Joseph M. Culp, Willem Goedkoop, Maria Kahlert, Danny C.P. Lau, Isabelle Lavoie, Jordan Musetta-Lambert, Jón S. Ólafsson, Kirsten S. Christoffersen
2026, PLOS Water (5)
Biodiversity loss and conservation are increasingly coming into focus in global policy fora, requiring information and assessments at wider spatial and temporal scales than previously considered. However, the monitoring framework required to support such data collection and assessment is lacking in many countries and is not harmonized...
Season and antecedent conditions impact concentration-discharge relationships for dissolved organic carbon and alkalinity in southeast Alaskan watershed
Claire Delbecq, Jason B. Fellman, J. Ryan Bellmore, Emily J. Whitney, Kevin Fitzgerald, Jeffrey A. Falke
2026, JGR Biogeosciences (131)
Fluvial export of dissolved carbon plays an important role in watershed-scale biogeochemistry. Predicted changes in climate are expected to impact watershed hydrologic regimes, and in turn, the sources and export of dissolved carbon from watersheds. Here, we utilize high resolution measurements of discharge and dissolved carbon concentration...
Integrating climate data and river modeling to reveal Chinook salmon habitat conditions in subarctic river basins
Rebecca Shaftel, Megan L. Feddern, Stephanie A. McAfee, Erik R. Schoen, Curry Cunningham, Vanessa R. von Biela, Josh Paul, Yifan Cheng, Andrew Newman, Margaret Perdue, Jon Schwenk, Al von Finster, Jeffrey A. Falke
2026, Ecosphere (17)
Climatic extremes can impact the productivity of aquatic species, affecting ecosystems and fishery-dependent communities. Advances in climate products, such as gridded datasets and downscaled projections, may be useful for quantifying freshwater habitat conditions and predicting climate change effects on fish. However, limited guidance exists for selecting climate...
Tectonic implications of transitional melting regimes from petrological, geochronological, and compositional characterization of the ophiolitic Seventymile terrane, Alaska, USA
Erin Todd, Jonathan Saul Caine, Michael Bizimis, Andrew R.C. Kylander-Clark, Robert Reece Hammond, Alicja Wypych
2026, Geosphere
New geochemical, U-Pb geochronology, and Sr-Nd-Hf isotope data provide evidence for the tectonic evolution of the Seventymile terrane in interior Alaska, USA. Ultramafic and mafic rocks of the Seventymile terrane are thought to represent components of a dismembered ophiolite and provide unique constraints on regional terrane evolution and accretion. The...
Toward an efficient framework for remote sensing of river bathymetry: Comparing sensors and algorithms on an inaccessible proglacial river in Alaska
Carl J. Legleiter, Christina M. Leonard, Paul A. Burger, Addison G. Pletcher, Paul J. Kinzel
2026, Geomorphology (495)
Remote sensing can provide reliable information on river depths and this approach might be particularly valuable in areas that are difficult to survey via conventional field methods. In this study, we assessed the potential to map the bathymetry of an inaccessible proglacial river in Alaska from both aerial orthophotos and...
A time-space model of graphite mineral systems
George N.D. Case
2026, Mineralium Deposita (61) 783-810
Increasing demand for graphite in energy storage systems warrants review of graphite ore genesis in a mineral systems framework. Orogenic graphite encompasses the metamorphic and orogenic mineral systems that produce flake graphite and hydrothermal vein (lump and chip) graphite deposits, respectively. A common feature of orogenic graphite deposits is an...
The 1912 Ms 7.2 earthquake in the Denali region of central Alaska
Carl Tape, Marco Aquino-Lopez, Sean Bemis, Peter J. Haeussler, Jessalyn Ginnaty
2026, Bulletin of the Seismological Society of America (116) 322-354
The 2002 Mw 7.9 earthquake in central Alaska ruptured 340 km on three faults—Susitna Glacier thrust fault, Denali fault, Totschunda fault—crossing both the Richardson Highway and the Alaska Pipeline. Its occurrence prompted renewed interest in historical large earthquakes that possibly originated on the Denali fault. One of these earthquakes was a Ms 7.2...
High-precision earthquake catalog for Minto Flats fault zone, central Alaska, reveals complex and conjugate faulting
Nealey E. Sims, Carl Tape, Natalia A. Ruppert, Michael E. West
2026, Bulletin of Seismological Society of America (116) 375-396
The Minto Flats fault zone (MFFZ) in central Alaska is a left‐lateral strike‐slip fault system situated between the continental‐scale right‐lateral Denali and Kaltag‐Tintina faults. The MFFZ has the potential to generate magnitude 7 earthquakes, and it hosted a magnitude 6 earthquake in 1995. It has also produced exotic events, such...
Cumulative effects analysis to inform public land management in the United States: Key characteristics and legal challenges
Tait K. Rutherford, Tim O. Hammond, Alison C. Foster, Megan A. Gilbert, Travis S. Haby, Richard J. Lehrter, Jennifer K. Meineke, Ella M. Samuel, Sarah K. Carter
2026, Environmental Impact Assessment Review (117)
Considering potential cumulative effects of proposed actions is fundamental to environmental impact analysis. However, cumulative effects analyses historically are not robust, especially for site-specific decisions. We sought to identify opportunities to strengthen cumulative effects analysis in a large United States public land management agency, the Bureau of Land Management (BLM)....
