Geochemical investigation of the hydrothermal system on Akutan Island, Alaska, July 2012
D. Bergfeld, Jennifer L. Lewicki, William C. Evans, Andrew G. Hunt, Kinga Revesz, Mark Huebner
2014, Scientific Investigations Report 2013-5231
We have studied the geochemistry of the hot springs on Akutan Island in detail for the first time since the early 1980s. Springs in four discrete groups (A-D) along Hot Springs Creek showed generally higher temperatures and substantially higher Na, Ca, and Cl concentrations than previously reported, and total hot-spring...
The 3D Elevation Program: summary for South Dakota
William J. Carswell Jr.
2014, Fact Sheet 2013-3084
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of South Dakota, elevation data are critical for agriculture and precision farming, natural resources conservation, water supply and quality, infrastructure and construction management,...
Uncertainty and extreme events in future climate and hydrologic projections for the Pacific Northwest: providing a basis for vulnerability and core/corridor assessments
Jeremy S. Littell, Guillaume S. Mauger, Eric P. Salathe, Alan F. Hamlet, Se-Yeun Lee, Matt R. Stumbaugh, Marketa Elsner, Robert Norheim, Eric R. Lutz, Nathan J. Mantua
2014, Report
The purpose of this project was to (1) provide an internally-consistent set of downscaled projections across the Western U.S., (2) include information about projection uncertainty, and (3) assess projected changes of hydrologic extremes. These objectives were designed to address decision support needs for climate adaptation and resource management actions. Specifically,...
Source and progression of a submarine landslide and tsunami: The 1964 Great Alaska earthquake at Valdez
Thomas E. Parsons, Eric L. Geist, Holly F. Ryan, Homa J. Lee, Peter J. Haeussler, Patrick Lynett, Patrick E. Hart, Ray W. Sliter, Emily C. Roland
2014, Journal of Geophysical Research - Solid Earth (119) 8502-8516
Like many subduction zone earthquakes, the deadliest aspects of the 1964 M = 9.2 Alaska earthquake were the tsunamis it caused. The worst of these were generated by local submarine landslides induced by the earthquake. These caused high runups, engulfing several coastal towns in Prince William Sound. In this paper, we study one...
Interspecific hybridization contributes to high genetic diversity and apparent effective population size in an endemic population of mottled ducks (Anas fulvigula maculosa)
Jeffrey L. Peters, Sarah A. Sonsthagen, Philip Lavretsky, Michael Rezsutek, William P. Johnson, Kevin G. McCracken
2014, Conservation Genetics (15) 509-520
Under drift-mutation equilibrium, genetic diversity is expected to be correlated with effective population size (Ne). Changes in population size and gene flow are two important processes that can cause populations to deviate from this expected relationship. In this study, we used DNA sequences from six independent loci to examine the...
Reviving common standards in point-count surveys for broad inference across studies
Steven M. Matsuoka, C. Lisa Mahon, Colleen M. Handel, Peter Solymos, Erin M. Bayne, Patricia C. Fontaine, C.J. Ralph
2014, Condor (116) 599-608
We revisit the common standards recommended by Ralph et al. (1993, 1995a) for conducting point-count surveys to assess the relative abundance of landbirds breeding in North America. The standards originated from discussions among ornithologists in 1991 and were developed so that point-count survey data could be broadly compared and jointly...
Survival of adult Red-throated Loons (Gavia stellata) may be linked to marine conditions
Joel A. Schmutz
2014, Waterbirds (37) 118-124
Large variations in the summering population size of Red-throated Loons (Gavia stellata) have occurred in recent decades in Alaska. Little information exists about annual or seasonal survival rates of adult Red-throated Loons. This study used tracking data from satellite transmitters implanted into 33 Red-throated Loons captured on breeding areas in Alaska...
Delineation of Tundra Swan Cygnus c. columbianus populations in North America: geographic boundaries and interchange
Craig R. Ely, William J.L. Sladen, Heather M. Wilson, Susan E. Savage, Kristine M. Sowl, Bill Henry, Mike Schwitters, James Snowden
2014, Wildfowl (64) 132-147
North American Tundra Swans Cygnus c. columbianus are composed of two wellrecognised populations: an Eastern Population (EP) that breeds across northern Canada and north of the Brooks Range in Alaska, which migrates to the eastern seaboard of the United States, and a Western Population (WP) that breeds in coastal regions of Alaska south of the Brooks...
Post-breeding migration of Dutch-breeding black-tailed godwits: timing, routes, use of stopovers, and nonbreeding destinations
Jos C. E. W. Hooijmeijer, Nathan R. Senner, T. Lee Tibbitts, Robert E. Gill Jr., David C. Douglas, Leo W. Bruinzeel, Eddy Wymenga, Theunis Piersma
2014, Ardea (101) 141-152
Conservation of long-distance migratory shorebirds is complex because these species use habitats spread across continents and hemispheres, making identification of critical habitats and potential bottlenecks in the annual cycle especially difficult. The population of Black-tailed Godwits that breeds in Western Europe, Limosa limosa limosa, has declined precipitously over the past...
Northern Pintail
Robert G. Clark, Joseph P. Fleskes, Karla L. Guyn, David A. Haukos, Jane E. Austin, Michael R. Miller
2014, The Birds of North America
This medium-sized dabbling duck of slender, elegant lines and conservative plumage coloration is circumpolar in distribution and abundant in North America, with core nesting habitat in Alaska and the Prairie Pothole Region of southern Canada and the northern Great Plains. Breeders favor shallow wetlands interspersed throughout prairie grasslands or arctic...
Evaluation of potential protective factors against metabolic syndrome in bottlenose dolphins:feeding and activity patterns of dolphins in Sarasota Bay, Florida
Randall S. Wells, Katherine A. McHugh, David C. Douglas, Steve Shippee, Elizabeth Berens McCabe, Nélio B. Barros, Goldie T. Phillips
2014, Frontiers in Endocrinology (4) 1-16
Free-ranging bottlenose dolphins (Tursiops truncatus) living in Sarasota Bay, Florida appear to have a lower risk of developing insulin resistance and metabolic syndrome compared to a group of dolphins managed under human care. Similar to humans, differences in diet and activity cycles between these groups may explain why Sarasota dolphins...
Demography and behavior of polar bears summering on land in Alaska
Elizabeth L. Peacock
2014, Report
Polar bears (Ursus maritimus) in the southern Beaufort Sea population (SB) are spending increased time on the coastal North Slope of Alaska between July and October (Gleason and Rode 2010). The duration spent on land by polar bears, satellite collared on the sea-ice in the spring, during the summer and...
Free-living waterfowl and shorebirds
Daniel M. Mulcahy
2014, Book chapter, Zoo animal and wildlife immobilization and anesthesia
No abstract available....
Modeling the hydrogeophysical response of lake talik evolution
Burke J. Minsley, Tristan Wellman, Michelle Ann Walvoord, Andre Revil
2014, Conference Paper, SEG Technical Program Expanded Abstracts 2014
Geophysical methods provide valuable information about subsurface permafrost and its relation to dynamic hydrologic systems. Airborne electromagnetic data from interior Alaska are used to map the distribution of permafrost, geological features, surface water, and groundwater. To validate and gain further insight into these field datasets, we also explore the geophysical...
Geophysical investigations of the geologic and hydrothermal framework of the Pilgrim Springs Geothermal Area, Alaska
Jonathan M.G. Glen, Darcy McPhee, Paul A. Bedrosian
2014, Conference Paper, Proceedings, Thirty-Ninth Workshop on Geothermal Reservoir Engineering
Pilgrim Hot Springs, located on the Seward Peninsula in west-central Alaska, is characterized by hot springs, surrounding thawed regions, and elevated lake temperatures. The area is of interest because of its potential for providing renewable energy for Nome and nearby rural communities. We performed ground and airborne geophysical investigations of...
New ichnological, paleobotanical and detrital zircon data from an unnamed rock unit in Yukon-Charley Rivers National Preserve (Cretaceous: Alaska): Stratigraphic implications for the region
Anthony R. Fiorillo, Federico Fanti, Chad Hults, Stephen T Hasiotis
2014, Palaios (29) 16-26
A paleontological reconnaissance survey on Cretaceous and Paleogene terrestrial units along the Yukon River drainage through much of east-central Alaska has provided new chronostratigraphic constraints, paleoclimatological data, and the first information on local biodiversity within an ancient, high-latitude ecosystem. The studied unnamed rock unit is most notable for its historic...
Sulfur and oxygen isotopic study of Paleozoic sediment-hosted Zn-Pb(-Ag-Au-Ba-F) deposits and associated hydrothermal alteration zones in the Nome Complex, Seward Peninsula, Alaska
W.C. Pat Shanks III, John F. Slack, Alison B. Till, Roland Thurston, Pamela Gemery-Hill
2014, GSA Special Papers (506) 235-258
Results of sulfur and oxygen isotope studies of sedimentary exhalative (SEDEX) Zn-Pb(-Ag-Au-Ba-F) deposits hosted in metamorphosed Paleozoic clastic and carbonate rocks of the Nome Complex, Seward Peninsula, Alaska, are consistent with data for similar deposits worldwide. Stable isotopic studies of the Nome Complex are challenging because the rocks have...
Spatial distribution of mercury in southeastern Alaskan streams influenced by glaciers, wetlands, and salmon
Sonia A. Nagorski, Daniel R. Engstrom, John P. Hudson, David P. Krabbenhoft, Eran Hood, John F. DeWild, George R. Aiken
2014, Environmental Pollution (184) 62-72
Southeastern Alaska is a remote coastal-maritime ecosystem that is experiencing increased deposition of mercury (Hg) as well as rapid glacier loss. Here we present the results of the first reported survey of total and methyl Hg (MeHg) concentrations in regional streams and biota. Overall, streams draining large wetland areas had...
Carbonate rocks of the Seward Peninsula, Alaska: Their correlation and paleogeographic significance
Julie A. Dumoulin, Alta Harris, John E. Repetski
2014, GSA Special Papers (506) 59-110
Paleozoic carbonate strata deposited in shallow platform to off-platform settings occur across the Seward Peninsula and range from unmetamorphosed Ordovician–Devonian(?) rocks of the York succession in the west to highly deformed and metamorphosed Cambrian–Devonian units of the Nome Complex in the east. Faunal and lithologic correlations indicate that early Paleozoic...
New imaging of submarine landslides from the 1964 earthquake near Whittier, Alaska, and a comparison to failures in other Alaskan fjords
Peter J. Haeussler, Thomas E. Parsons, David P. Finlayson, Patrick J. Hart, Jason D. Chaytor, Holly F. Ryan, Homa J. Lee, Keith A. Labay, Andrew Peterson, Lee Liberty
2014, Book chapter, Submarine mass movements and their consequences, Advances in Natural and Technological Hazards Research Vol. 37
The 1964 Alaska M w 9.2 earthquake triggered numerous submarine slope failures in fjords of southern Alaska. These failures generated local tsunamis, such as at Whittier, where they inundated the town within 4 min of the beginning of shaking. Run-up was up to 32 m, with 13 casualties....
Decadal-scale variability of diffuse CO2 emissions and seismicity revealed from long-term monitoring (1995–2013) at Mammoth Mountain, California, USA
Cynthia A. Werner, Deborah Bergfeld, Chris Farrar, Michael P. Doukas, Peter J. Kelly, Christoph Kern
2014, Journal of Volcanology and Geothermal Research (289) 51-63
Mammoth Mountain, California, is a dacitic volcano that has experienced several periods of unrest since 1989. The onset of diffuse soil CO2 emissions at numerous locations on the flanks of the volcano began in 1989–1990 following an 11-month period of heightened seismicity. CO2 emission rates were measured yearly from 1995...
Estuarine removal of glacial iron and implications for iron fluxes to the ocean
Andrew W. Schroth, John Crusius, Ian Hoyer, Robert Campbell
2014, Geophysical Research Letters (41) 3951-3958
While recent work demonstrates that glacial meltwater provides a substantial and relatively labile flux of the micronutrient iron to oceans, the role of high-latitude estuary environments as a potential sink of glacial iron is unknown. Here we present the first quantitative description of iron removal in a meltwater-dominated estuary. We...
Change-in-ratio
Mark S. Udevitz
2014, Book chapter, Encyclopedia of Environmetrics
Change-in-ratio (CIR) methods are used to estimate parameters for ecological populations subject to differential removals from population subclasses. Subclasses can be defined according to criteria such as sex, age, or size of individuals. Removals are generally in the form of closely monitored sport or commercial harvests. Estimation is based on...
Variation in the response of an Arctic top predator experiencing habitat loss: Feeding and reproductive ecology of two polar bear populations
Karyn D. Rode, Eric V. Regehr, David C. Douglas, George M. Durner, Andrew E. Derocher, Gregory W. Thiemann, Suzanne M. Budge
2014, Global Change Biology (20) 76-88
Polar bears (Ursus maritimus) have experienced substantial changes in the seasonal availability of sea ice habitat in parts of their range, including the Beaufort, Chukchi, and Bering Seas. In this study, we compared the body size, condition, and recruitment of polar bears captured in the Chukchi and Bering Seas (CS)...
Abdominally implanted satellite transmitters affect reproduction and survival rather than migration of large shorebirds
Jos C. E. W. Hooijmeijer, Robert E. Gill Jr., Daniel M. Mulcahy, T. Lee Tibbitts, Rosemarie Kentie, Gerrit J. Gerritsen, Leo W. Bruinzeel, David C. Tijssen, Christopher M. Harwood, Theunis Piersma
2014, Journal of Ornithology (155) 447-457
Satellite telemetry has become a common technique to investigate avian life-histories, but whether such tagging will affect fitness is a critical unknown. In this study, we evaluate multi-year effects of implanted transmitters on migratory timing and reproductive performance in shorebirds. Shorebirds increasingly are recognized as good models in ecology and...
