26 August 2024 Reduced representation sequencing reveals weak genetic differentiation between Canadian and European Larus hyperboreus (Glaucous Gull)
Emma Lachance Linklater, Sarah A. Sonsthagen, Gregory J. Robertson, Lila Colston-Nepali, Freydís Vigfusdottir, Vicki L. Friesen
2024, Ornithological Applications (126) 1-11
Climate change poses a significant threat to Arctic ecosystems. Evaluation of genetic diversity within and differentiation among populations is needed to effectively conserve Arctic species and ensure genetic variation is appropriately managed.This research examined the population genetic structure in Larus hyperboreus (Glaucous Gull), a circumpolar Arctic species that is declining in parts...
Seasonal patterns in riverine carbon form and export from a temperate forested watershed in Southeast Alaska
Claire Delbecq, Jason B. Fellman, J. Ryan Bellmore, Emily J. Whitney, Eran Hood, Kevin Fitzgerald, Jeffrey A. Falke
2024, Biogeochemistry (167) 1353-1369
Riverine export of carbon (C) is an important part of the global C cycle; however, most riverine C budgets focus on individual forms of C and fail to comprehensively measure both organic and inorganic C species in concert. To address this knowledge gap, we conducted high frequency sampling of multiple...
ShakeAlert® and schools: Incorporating earthquake early warning in school districts in Alaska, California, Oregon, and Washington
Rachel M. Adams, Holly Davies, Lori Peek, Meghan Mordy, Jennifer Tobin, Jolie Breeden, Sara K. McBride, Robert Michael deGroot
2024, International Journal of Disaster Risk Reduction (112)
The U.S. Geological Survey-managed ShakeAlert® earthquake early warning system is the first public alerting system in the United States to provide rapid mass notification when an earthquake is detected. Although public alert delivery via mobile phones began in California in 2019 followed by Oregon and Washington in 2021, little is...
The effect of drying boreal lakes on plants, soils, and microbial communities in lake margin habitats
Vijay P. Patil, Jack McFarland, Kimberly Wickland, Kristen L. Manies, Mark Winterstein, Teresa N. Hollingsworth, Eugénie S. Euskirchen, Mark Waldrop
2024, JGR Biogeosciences (129)
Decadal scale lake drying in interior Alaska results in lake margin colonization by willow shrub and graminoid vegetation, but the effects of these changes on plant production, biodiversity, soil properties, and soil microbial communities are not well known. We studied changes in soil organic carbon (SOC) and nitrogen (N) storage,...
Glaciers and ice caps outside Greenland
D. Burgess, G. Wolken, B. Wouters, L.M. Andreassen, Caitlyn Florentine, J. Kohler, B. Luks, F. Palsson, Louis C. Sass, L. Thomson, T. Thorsteinsson
2024, Report, Bulletin of the American Meteorological Society, State of the Climate, 2023 report
No abstract available....
Observing glacier elevation changes from spaceborne optical and radar sensors – an inter-comparison experiment using ASTER and TanDEM-X data
Livia Piermattei, Michael Zemp, Christian Sommer, Fanny Brun, Matthias H. Braun, Liss M. Andreassen, Joaquin M. C. Belart, Etienne Berthier, Atanu Bhattacharya, Laura Boehm Vock, Tobias Bolch, Amaury Dehecq, Ines Dussaillant, Daniel Falaschi, Caitlyn Florentine, Dana Floricioiu, Christian Ginzler, Gregoire Guillet, Romain Hugonnet, Andreas Kaab, Owen King, Christoph Klug, Friedrich Knuth, Lukas Krieger, Jeff La Frenierre, Robert McNabb, Christopher McNeil, Rainer Prinz, Louis C. Sass, Thorsten Seehaus, David Shean, Desiree Treichler, Anja Wendt, Ruitang Yang
2024, The Cryosphere (18) 3195-3230
Observations of glacier mass changes are key to understanding the response of glaciers to climate change and related impacts, such as regional runoff, ecosystem changes, and global sea level rise. Spaceborne optical and radar sensors make it possible to quantify glacier elevation changes, and...
Mapping eelgrass cover and biomass at Izembek Lagoon, Alaska, using in-situ field data and Sentinel-2 satellite imagery
David C. Douglas, Michael D. Fleming, Vijay P. Patil, David H. Ward
2024, Preprint
Two eelgrass (Zostera marina) maps of Izembek Lagoon, Alaska, were generated by first creating maps of spectrally unique classes from each of two Sentinel-2 satellite images collected on July 1, 2016, and August 14, 2020, then attributing the spectral classes with information about eelgrass conditions based on field data. Maps...
The Amazon Basin’s rivers and lakes support Nearctic-breeding shorebirds during southward migration
Jennifer A. Linscott, Enzo Basso, Rosalyn Bathrick, Juliana Bosi de Almeida, Alexandra Anderson, Fernando Angulo-Pratolongo, Bart M Ballard, Joël Bêty, Stephen Brown, Katherine S. Christie, Sarah J. Clements, Christian Friis, Callie Gesmundo, Marie-Andree Giroux, Autumn-Lynn Harrison, Christopher M. Harwood, Jason M. Hill, James A. Johnson, Bart Kempenaers, Benoit Laliberte, Jean-François Lamarre, Richard B. Lanctot, Christopher Latty, Nicolas Lecomte, Laura Anne McDuffie, Juan G. Navedo, Erica Nol, Zachary M. Pohlen, Jennie Rausch, R.B. Renfrew, Jorge Ruiz, Mike Russell, Daniel R. Ruthrauff, Sarah T. Saalfeld, Brett K. Sandercock, Shiloh A. Schulte, Paul A Smith, Audrey R. Taylor, T. Lee Tibbitts, Mihai Valcu, Mitch D. Weegman, James R. Wright, Nathan R. Senner
2024, Ornithological Applications (126)
Identifying the migration routes and stopover sites used by declining species is critical for developing targeted conservation actions. Long-distance migratory shorebirds are among the groups of birds declining most rapidly, yet we frequently lack detailed knowledge about the routes and stopover sites they use during their hemisphere-spanning migrations. This is...
Assessing the risk of climate maladaptation for Canadian polar bears
L. Ruth Rivkin, Evan Richardson, Joshua D. Miller, Todd C. Atwood, Steven Baryluk, Erik W. Born, Corey Davis, Marcus Dyck, Evelien de Greef, Kristin L. Laidre, Nick Lunn, Sarah McCarthy-Neumann, Martyn E. Obbard, Megan A. Owen, Nicholas Pilfold, Amelie Roberto-Charro, Oystein Wiig, Aryn Wilder, Colin J Garroway
2024, Ecology Letters (27)
The Arctic is warming four times faster than the rest of the world, threatening the persistence of many Arctic species. It is uncertain if Arctic wildlife will have sufficient time to adapt to such rapidly warming environments. We used genetic forecasting to measure the risk of maladaptation to warming temperatures...
The 2023 Alaska National Seismic Hazard Model
Peter M. Powers, Jason M. Altekruse, Andrea L. Llenos, Andrew J. Michael, Kirstie Lafon Haynie, Peter J. Haeussler, Adrian Bender, Sanaz Rezaeian, Morgan P. Moschetti, James Andrew Smith, Richard W. Briggs, Robert C. Witter, Charles Mueller, Yuehua Zeng, Demi Leafar Girot, Julie A. Herrick, Allison Shumway, Mark D. Petersen
2024, Earthquake Spectra (40) 2545-2597
US Geological Survey (USGS) National Seismic Hazard Models (NSHMs) are used extensively for seismic design regulations in the United States and earthquake scenario development, as well as risk assessment and mitigation for both buildings and infrastructure. This 2023 update of the long-term, time-independent Alaska NSHM includes substantial changes to both...
Capelin on the rebound: Using seabird diets to track trends in forage fish populations
Mayumi L. Arimitsu, Caitlin Elizabeth Marsteller, John F. Piatt, Scott Hatch, Shannon Wheland
2024, Newsletter
Capelin are cold-water forage fish that respond rapidly to fluctuating ocean temperatures. They are prized food for seabirds and other marine predators in Alaska. Researchers have monitored seabird diets at Middleton Island for decades to make connections between changes in abundance of predators and their prey. During a prolonged marine...
Permafrost history in the sporadic zone as context for recent carbon loss using acryostratigraphy, plant macrofossil, and stable isotope approach
Miriam C. Jones, Lesleigh Anderson, Eva Anne Stephani, Benjamin M. Jones
2024, Conference Paper, 12th International conference on permafrost, proceedings
Permafrost and landscape history, in addition to ground ice content, are increasingly identified as important components in predicting permafrost thaw trajectories. Together with cryostratigraphy, plant remains and stable isotopes can provide useful information about past permafrost aggradation and thaw. We applied these methods with radiocarbon dating on peat and permafrost...
Return rates of GPS-tagged Pacific Golden-Plovers: A controlled study in Hawaii
Oscar W. Johnson, Michael Weber, David R. Bybee, T. Lee Tibbitts, Susan Scott, Joshua Fisher, Wendy A. Kuntz, Susanne Spiessberger, Sigrid Southworth, Elizabeth Maynard, Laura Zoller, Carolyn Smith
2024, Wader Study (131) 152-155
In a study of GPS-tagged Pacific Golden-Plovers wintering at Moorea, French Polynesia, Johnson et al. (2020) raised questions about possible tag-induced mortality. Similar concerns in other species have generated considerable attention in recent years. Of 19 tagged plovers that departed Moorea on northward migration, only one bird (5 %)...
Geolocators, stable isotopes, and citizen science identify migratory timing, route, and spring molt of Smith’s Longspurs
Alexis Will, Heather McFarland, Christopher Latty, Abby Powell
2024, Avian Conservation and Ecology (19)
Climate change is having a disproportionate impact on the Arctic. For Arctic breeding birds, basic knowledge of their annual cycle, specifically the timing, route, and movement behavior of migration, is needed to understand when and where populations may experience threats. We used a combination of geolocators and stable isotope analysis...
Effect of a dense inflow on the stratification of a steep-side lake
Roger Pieters, Gregory A. Lawrence, Albert Leung, John Crusius, Thomas Pedersen
2024, Limnology and Oceanography (69) 1905-1917
We detail the effect of a small stream of dense inflow that significantly altered the stratification and water quality in a constructed water body in northern British Columbia, Canada. As the dense inflow passed through the epilimnion of the steep-sided lake, it entrained relatively large quantities of water. The resulting...
3-D geological modeling for numerical flow simulation studies of gas hydrate reservoirs at the Kuparuk State 7-11-12 Pad in the Prudhoe Bay Unit on the Alaska North Slope
Machiko Tamaki, Misuzu Taninaka, Satoshi Ohtsuki, Aung Than Tin, Naoyuki Shimoda, Timothy Collett, Ray Boswell
2024, Energy and Fuels (28) 15248-15269
Accurate reservoir evaluation requires reliable three-dimensional (3-D) geological models. This study conducted 3-D geological modeling for numerical flow simulation of the B1 sand gas hydrate reservoir at the Kuparuk State 7-11-12 pad, Prudhoe Bay Unit, Alaska North Slope. The model integrates well logs, core, and seismic...
Collision structures of the Prince William terrane and Chugach terrane docking along the Shumagin and Unimak convergent margins, Alaska, USA
Roland E. von Huene, John J. Miller
2024, Geosphere (20) 1276-1285
Western Alaska’s convergent margins are composed of tectonostratigraphic terranes. On land, terrane assembly is recognized along boundaries or sutures between neighboring geologic elements with distinctly different origins. In marine areas where rock outcrops are covered by sediment, recognizing terrane sutures is problematic. A fault in seismic dip line 5 of...
Assessing the population consequences of disturbance and climate change for the Pacific walrus
Devin L. Johnson, Joseph Michael Eisaguirre, Rebecca L. Taylor, Joel L. Garlich-Miller
2024, Marine Ecology Progress Series (740) 193-211
Climate change and anthropogenic disturbance are increasingly affecting wildlife at a global scale. Predicting how varying types and degrees of disturbance may interact to influence population dynamics is a key management challenge. Population consequences of disturbance (PCoD) models provide a framework to link effects of anthropogenic disturbance on an...
Upland Yedoma taliks are an unpredicted source of atmospheric methane
Katey M. Walter Anthony, Nicholas Hasson, Colin W. Edgar, Orit Sivan, Effrat Eliani-Russak, Oded Bergman, Burke J. Minsley, Stephanie R. James, Neal J. Pastick, Alexander Kholodov, Sergey Zimov, Eugenie Euskirchen, Marion S. Bret-Harte, Guido Grosse, Moritz Langer, Jan Nitzbon
2024, Nature Communications (15)
Landscape drying associated with permafrost thaw is expected to enhance microbial methane oxidation in arctic soils. Here we show that ice-rich, Yedoma permafrost deposits, comprising a disproportionately large fraction of pan-arctic soil carbon, present an alternate trajectory. Field and laboratory observations indicate that talik (perennially thawed soils in permafrost) development...
Paramyxoviruses of fish
Ted R. Meyers, William N. Batts
2024, Book chapter, Aquaculture virology (second edition)
The first fish paramyxovirus was isolated from normal adult Chinook salmon returning to a coastal hatchery in Oregon in the fall of 1982. Subsequently, the virus was isolated from other stocks of adult Chinook salmon and one stock of adult coho salmon in California, Oregon, Washington, and Alaska, leading to its designation as the Pacific salmon paramyxovirus (PsaPV). The slow-growing virus can...
Sero-epidemiology of Highly Pathogenic Avian Influenza viruses among wild birds in subarctic intercontinental transition zones
Jonathon D. Gass, Robert J. Dusek, Nichola J. Hill, Laura Borkenhagen, Jeffrey S. Hall, Gunnar Thor Hallgrimsson, Mary Anne Bishop, Andrew M. Ramey, Timothy J. Spivey, Solvi Runar Vignisson, Sunna Bjork Ragnarsdottir, Halldor Palmar Halldorsson, Jon Einar Jonsson, Alexa D. Simulynas, Felicia B. Nutter, Wendy B. Puryear, Jonathan A. Runstadler
2024, Preprint
Background: The geographic expansion and evolution of A/Goose/Guangdong/1/1996(H5N1) (Gs/GD) lineage H5Nx highly pathogenic avian influenza (HPAI) viruses since 1996 have raised awareness of enzootic circulation among migratory birds and the potential for intercontinental transport and spread. Recent Pacific- and Atlantic-route introductions of HPAI to North America were facilitated by avian migration...
Same streams in a different forest? Investigations of forest harvest legacies and future trajectories across 30 years of stream habitat monitoring on the Tongass National Forest, Alaska
Michael J. Moore, R. Flitcroft, E. Tucker, K. K. Prussian, S. M. Claeson
2024, PLoS ONE (19)
The effects of timber harvest practices and climate change have altered forest ecosystems in southeast Alaska. However, quantification of patterns and trends in stream habitats associated with these forests is limited owing to a paucity of data available in remote watersheds. Here, we analyzed a 30-year dataset from southeast Alaska's...
Relative importance of macroalgae and phytoplankton to nearshore consumers and growth across climatic conditions in the northern Gulf of Alaska
Katherine Corliss, Vanessa R. von Biela, Heather Coletti, James L. Bodkin, Daniel Esler, Katrin Iken
2024, Estuaries and Coasts (47) 1579-1597
Macroalgae and phytoplankton support the base of highly productive nearshore ecosystems in cold-temperate regions. To better understand their relative importance to nearshore food webs, this study considered four regions in the northern Gulf of Alaska where three indicator consumers were collected, filter-feeding mussels (Mytilus trossulus), pelagic-feeding Black Rockfish (Sebastes melanops),...
Accelerating glacier volume loss on Juneau Icefield driven by hypsometry and melt-accelerating feedbacks
Bethan Davies, Robert McNabb, Jacob Bendle, Jonathan L. Carrivick, Jeremy Ely, Tom Holt, Bradley Markle, Christopher J. McNeil, Lindsey Nicholson, Mauri Pelto
2024, Nature Communications (15)
Globally, glaciers and icefields contribute significantly to sea level rise. Here we show that ice loss from Juneau Icefield, a plateau icefield in Alaska, accelerated after 2005 AD. Rates of area shrinkage were 5 times faster from 2015–2019 than from 1979–1990. Glacier volume loss remained fairly...
Adaptive fine-tuning for transferring a U-net hydrography extraction model using K-means
Larry Stanislawski, Ethan J. Shavers, Neal J. Pastick, Philip T. Thiem, Shaowen Wang, Nattapon Jaroenchai, Zhe Jiang, Barry J. Kronenfeld, Barbara P. Buttenfield, Adam Camerer
2024, Conference Paper
The United States Geological Survey (USGS) coordinates the collection of hydrographic features derived from remotely sensed interferometric synthetic aperture radar (IfSAR) elevation and intensity data in Alaska. Hydrographic features are cartographic representations of surface water features such as stream, rivers, lakes, ponds, canals, etc. Collection and validation procedures involve complex...
