An exploratory assessment of thiamine status in western Alaska Chinook salmon (Oncorhynchus tshawytscha)
Dale C. Honeyfield, James M. Murphy, Katherine G. Howard, Wesley W. Strasburger, A.C. Matz
2017, North Pacific Anadromous Fish Commission Bulletin (6) 21-31
This study was conducted to investigate the thiamine status of Chinook salmon Oncorhynchus tshawytscha. Egg thiamine levels in Yukon and Kuskokwim River Chinook were examined in 2001 and 2012. Muscle and liver thiamine in Chinook, coho O. kisutch, chum O. keta, and pink O. gorbuscha salmon were measured in northern...
Measuring fish and their physical habitats: Versatile 2D and 3D video techniques with user-friendly software
Jason R. Neuswanger, Mark S. Wipfli, Amanda E. Rosenberger, Nicholas F. Hughes
2017, Canadian Journal of Fisheries and Aquatic Sciences (73) 1861-1873
Applications of video in fisheries research range from simple biodiversity surveys to three-dimensional (3D) measurement of complex swimming, schooling, feeding, and territorial behaviors. However, researchers lack a transparently developed, easy-to-use, general purpose tool for 3D video measurement and event logging. Thus, we developed a new measurement system, with freely available,...
Detrital zircon geochronology of pre- and syncollisional strata, Acadian orogen, Maine Appalachians
Dwight Bradley, Paul B. O’Sullivan
2017, Basin Research (29) 571-590
The Central Maine Basin is the largest expanse of deep-marine, Upper Ordovician to Devonian metasedimentary rocks in the New England Appalachians, and is a key to the tectonics of the Acadian Orogeny. Detrital zircon ages are reported from two groups of strata: (1) the Quimby, Rangeley, Perry Mountain and Smalls...
Reference intervals for serum biochemistries of molting Pacific Black Brant (Branta bernicla nigricans) in Northern Alaska, USA
J. Christian Franson, Paul L. Flint, Joel A. Schmutz
2017, Journal of Wildlife Diseases (53) 417-419
We determined reference intervals for nine serum biochemistries in samples from 329 molting, after-hatch-year, Pacific Black Brant (Branta bernicla nigricans) in Alaska, US. Cholesterol and nonesterified fatty acids differed by sex, but no other differences were noted....
Foreword: The dynamics of change in Alaska’s boreal forests: Resilience and vulnerability in response to climate warming
A. David McGuire, F. Stuart Chapin III, Roger W. Ruess
2016, Canadian Journal of Forest Research (40) 1195-1196
Long-term research by the Bonanza Creek (BNZ) Long Term Ecological Research (LTER) program has documented natural patterns of interannual and successional variability of the boreal forest in interior Alaska against which we can detect changes in system behavior. Between 2004 and 2010 the BNZ LTER program focused on understanding the...
Interactions of landscape disturbances and climate change dictate ecological pattern and process: spatial modeling of wildfire, insect, and disease dynamics under future climates
Rachel A. Loehman, Robert E. Keane, Lisa M. Holsinger, Zhiwei Wu
2016, Landscape Ecology (32) 1447-1459
ContextInteractions among disturbances, climate, and vegetation influence landscape patterns and ecosystem processes. Climate changes, exotic invasions, beetle outbreaks, altered fire regimes, and human activities may interact to produce landscapes that appear and function beyond historical analogs.ObjectivesWe used the mechanistic ecosystem-fire...
An automated approach for mapping persistent ice and snow cover over high latitude regions
David J. Selkowitz, Richard R. Forster
2016, Remote Sensing (8)
We developed an automated approach for mapping persistent ice and snow cover (glaciers and perennial snowfields) from Landsat TM and ETM+ data across a variety of topography, glacier types, and climatic conditions at high latitudes (above ~65°N). Our approach exploits all available Landsat scenes acquired during the late summer (1...
Arctic Research Plan: FY2017-2021
Sandy Starkweather, Martin O Jeffries, Simon Stephenson, Rebecca Anderson, Benjamin M. Jones, Rachel A. Loehman, Vanessa R. von Biela
2016, Report
The United States is an Arctic nation—Americans depend on the Arctic for biodiversity and climate regulation and for natural resources. America’s Arctic—Alaska—is at the forefront of rapid climate, environmental, and socio-economic changes that are testing the resilience and sustainability of communities and ecosystems. Research to increase fundamental understanding of these...
Geography and host species shape the evolutionary dynamics of U genogroup infectious hematopoietic necrosis virus
Allison Black, Rachel Breyta, Trevor Bedford, Gael Kurath
2016, Virus Evolution (2)
Infectious hematopoietic necrosis virus (IHNV) is a negative-sense RNA virus that infects wild and cultured salmonids throughout the Pacific Coastal United States and Canada, from California to Alaska. Although infection of adult fish is usually asymptomatic, juvenile infections can result in high mortality events that impact salmon hatchery programs and...
Novel picornavirus associated with avian keratin disorder in Alaskan birds
Maxine Zylberberg, Caroline R. Van Hemert, John P. Dumbacher, Colleen M. Handel, Tarik Tihan, Joseph L. DeRisi
2016, mBio (7) 1-10
Avian keratin disorder (AKD), characterized by debilitating overgrowth of the avian beak, was first documented in black-capped chickadees (Poecile atricapillus) in Alaska. Subsequently, similar deformities have appeared in numerous species across continents. Despite the widespread distribution of this emerging pathology, the cause of AKD remains elusive. As a result, it...
Influence of static habitat attributes on local and regional Rocky intertidal community structure
B. Konar, K. Iken, H. Coletti, Daniel H. Monson, Ben P. Weitzman
2016, Estuaries and Coasts (39) 1735-1745
Rocky intertidal communities are structured by local environmental drivers, which can be dynamic, fluctuating on various temporal scales, or static and not greatly varying across years. We examined the role of six static drivers (distance to freshwater, tidewater glacial presence, wave exposure, fetch, beach slope, and substrate composition) on intertidal...
Dissolved organic matter composition of Arctic rivers: Linking permafrost and parent material to riverine carbon
Jonathan A. O’Donnell, George R. Aiken, David K. Swanson, Panda Santosh, Kenna D. Butler, Andrew P. Baltensperger
2016, Global Biogeochemical Cycles (30) 1811-1826
Recent climate change in the Arctic is driving permafrost thaw, which has important implications for regional hydrology and global carbon dynamics. Permafrost is an important control on groundwater dynamics and the amount and chemical composition of dissolved organic matter (DOM) transported by high-latitude rivers. The consequences of permafrost thaw for...
High-latitude dust in the Earth system
Joanna E Bullard, Matthew Baddock, Tom Bradwell, John Crusius, Eleanor Darlington, Diego Gaiero, Santiago Gasso, Gudrun Gisladottir, Richard Hodgkins, Robert McCulloch, Cheryl NcKenna Neuman, Tom Mockford, Helena Stewart, Throstur Thorsteinsson
2016, Reviews of Geophysics (54) 447-485
Natural dust is often associated with hot, subtropical deserts, but significant dust events have been reported from cold, high latitudes. This review synthesizes current understanding of high-latitude (≥50°N and ≥40°S) dust source geography and dynamics and provides a prospectus for future research on the topic. Although the fundamental processes controlling...
Modeling ancient land use and resilient forests in the Jemez Mountains
Rachel A. Loehman
2016, Archaeology Southwest Magazine (30)
No abstract available....
Nonmarine facies in the Late Triassic(?) to Early Jurassic Horn Mountain Tuff member of the Talkeetna Formation, Horn Mountain, lower Cook Inlet basin, Alaska
D. L. LePain, Richard G. Stanley, K. P. Helmold
2016, Preliminary Interpretive Report 2016-1-2
The Talkeetna Formation is a prominent lithostratigraphic unit in south-central Alaska. In the Iniskin–Tuxedni area, Detterman and Hartsock (1966) divided the formation into three mappable units including, from oldest to youngest, the Marsh Creek Breccia, the Portage Creek Agglomerate, and the Horn Mountain Tuff Members. The Horn Mountain Tuff Member...
Leveraging constraints and biotelemetry data to pinpoint repetitively used spatial features
Brian M. Brost, Mevin Hooten, Robert J. Small
2016, Ecology (98) 12-20
Satellite telemetry devices collect valuable information concerning the sites visited by animals, including the location of central places like dens, nests, rookeries, or haul‐outs. Existing methods for estimating the location of central places from telemetry data require user‐specified thresholds and ignore common nuances like measurement error. We present a fully...
Reconnaissance stratigraphy of the Red Glacier Formation (Middle Jurassic) near Hungryman Creek, Cook Inlet basin, Alaska
D. L. LePain, Richard G. Stanley, K. P. Helmold
2016, Preliminary Interpretive Report 2016-1-3
Geochemical data suggest the source of oil in upper Cook Inlet fields is Middle Jurassic organic-rich shales in the Tuxedni Group (Magoon and Anders, 1992; Lillis and Stanley, 2011; LePain and others, 2012, 2013). Of the six formations in the group (Detterman, 1963), the basal Red Glacier Formation is the...
Sedimentary petrology and reservoir quality of the Middle Jurassic Red Glacier Formation, Cook Inlet forearc basin: Initial impressions
K. P. Helmold, D. L. LePain, Richard G. Stanley
2016, Preliminary Interpretive Report 2016-1-4
The Division of Geological & Geophysical Surveys and Division of Oil & Gas are currently conducting a study of the hydrocarbon potential of Cook Inlet forearc basin (Gillis, 2013, 2014; LePain and others, 2013; Wartes, 2015; Herriott, 2016 [this volume]). The Middle Jurassic Tuxedni Group is recognized as a major...
An empirical approach for estimating stress-coupling lengths for marine-terminating glaciers
Ellyn Enderlin, Gordon S. Hamilton, Shad O’Neel, Timothy C. Bartholomaus, Mathieu Morlighem, John W. Holt
2016, Frontiers in Earth Science (4) 1-12
Variability in the dynamic behavior of marine-terminating glaciers is poorly understood, despite an increase in the abundance and resolution of observations. When paired with ice thicknesses, surface velocities can be used to quantify the dynamic redistribution of stresses in response to environmental perturbations through computation of the glacier force balance. However,...
Katmai National Park and Preserve and Alagnak Wild River: Geologic resources inventory report
Chad Hults, Judith E. Fierstein
2016, Natural Resource Report NPS/NRSS/GRD/NRR—2016/1314
The Geologic Resources Inventory (GRI) is one of 12 inventories funded by the National Park Service (NPS) Inventory and Monitoring Program. The Geologic Resources Division of the NPS Natural Resource Stewardship and Science Directorate administers the GRI. This GRI report was written for resource managers to support science-informed decision making....
Interactions among vegetation, climate, and herbivory control greenhouse gas fluxes in a subarctic coastal wetland
K.C. Kelsey, A.J. Leffler, K.H. Beard, Joel A. Schmutz, R.T. Choi, J.M. Welker
2016, Journal of Geophysical Research: Biogeosciences (121) 2960-2975
High-latitude ecosystems are experiencing the most rapid climate changes globally, and in many areas these changes are concurrent with shifts in patterns of herbivory. Individually, climate and herbivory are known to influence biosphere-atmosphere greenhouse gas (GHG) exchange; however, the interactive effects of climate and herbivory in driving GHG...
Haemosporidian parasite infections in grouse and ptarmigan: Prevalence and genetic diversity of blood parasites in resident Alaskan birds
Matthew M. Smith, Caroline R. Van Hemert, Richard Merizon
2016, International Journal for Parasitology: Parasites and Wildlife (5) 229-239
Projections related to future climate warming indicate the potential for an increase in the distribution and prevalence of blood parasites in northern regions. However, baseline data are lacking for resident avian host species in Alaska. Grouse and ptarmigan occupy a diverse range of habitat types throughout the northern hemisphere and...
Multidecadal increases in the Yukon River Basin of chemical fluxes as indicators of changing flowpaths, groundwater, and permafrost
Ryan C. Toohey, Nicole M. Herman-Mercer, Paul F. Schuster, Edda A. Mutter, Joshua C. Koch
2016, Geophysical Research Letters (43) 12120-12130
The Yukon River Basin, underlain by discontinuous permafrost, has experienced a warming climate over the last century that has altered air temperature, precipitation, and permafrost. We investigated a water chemistry database from 1982 to 2014 for the Yukon River and its major tributary, the Tanana River. Significant increases of Ca,...
Conservation status of polar bears (Ursus maritimus) in relation to projected sea-ice declines
Eric V. Regehr, Kristin L. Laidre, H. Resit Akcakaya, Steven C. Amstrup, Todd C. Atwood, Nicholas J. Lunn, Martyn E. Obbard, Harry Stern, Gregory W. Thiemann, Øystein Wiig
2016, Biology Letters (12) 1-5
Loss of Arctic sea ice owing to climate change is the primary threat to polar bears throughout their range. We evaluated the potential response of polar bears to sea-ice declines by (i) calculating generation length (GL) for the species, which determines the timeframe for conservation assessments; (ii) developing a standardized...
A possible source mechanism of the 1946 Unimak Alaska far-field tsunami, uplift of the mid-slope terrace above a splay fault zone
Roland E. von Huene, John J. Miller, Dirk Klaeschen, Peter Dartnell
2016, Pure and Applied Geophysics (173) 4189-4201
In 1946, megathrust seismicity along the Unimak segment of the Alaska subduction zone generated the largest ever recorded Alaska/Aleutian tsunami. The tsunami severely damaged Pacific islands and coastal areas from Alaska to Antarctica. It is the charter member of “tsunami” earthquakes that produce outsized far-field tsunamis for the recorded magnitude....
