Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline
J.K. Mortensen, Cynthia Dusel-Bacon, J. Hunt, J. Gabites
2006, Special Paper - Geological Association of Canada (45) 261-280
No abstract available....
Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory
JoAnne L. Nelson, Maurice Colpron, Stephen Piercey, Cynthia Dusel-Bacon, Donald Murphy, Charlie Roots
2006, Special Paper - Geological Association of Canada (45) 25-74
No abstract available....
Sedimentary processes in modern and ancient oceanic arc settings: evidence from the Jurassic Talkeetna Formation of Alaska and the Mariana and Tonga Arcs, western Pacific
Amy E. Draut, Peter D. Clift
2006, Journal of Sedimentary Research (76) 493-514
Sediment deposited around oceanic volcanic ares potentially provides the most complete record of the tectonic and geochemical evolution of active margins. The use of such tectonic and geochemical records requires an accurate understanding of sedimentary dynamics in an arc setting: processes of deposition and reworking that affect the degree to...
Estimating Potential Effects of Hypothetical Oil Spills on Polar Bears
Steven C. Amstrup, George M. Durner, T. L. McDonald, W.R. Johnson
2006, Report
Much is known about the transport and fate of oil spilled into the sea and its toxicity to exposed wildlife. Previously, however, there has been no way to quantify the probability that wildlife dispersed over the seascape would be exposed to spilled oil. Polar bears, the apical predator of the...
Surveillance for Asian H5N1 avian influenza in the United States
S. Ip, Paul G. Slota
2006, Fact Sheet 2006-3025
Increasing concern over the potential for migratory birds to introduce the Asian H5N1 strain of avian influenza to North America prompted the White House Policy Coordinating Committee for Pandemic Influenza Preparedness to request that the U.S. Departments of Agriculture (USDA) and Interior (DOI) develop a plan for the early detection...
Habitat-based adaptive management at Mount Haggin Wildlife Management Area
R.B. Keigley, C.W. Fager
2006, Alces (42) 49-54
The 22,743-hectare Mount Haggin Wildlife Management Area was purchased in 1976, in part for moose (Alces alces) winter range. Observed moose populations climbed from a low of 7 in 1976 to a high of 56 in 2000. A 4-step management program was initiated in 2000 consisting of definition of management...
Spatial and temporal variation in sea otter demography
M. Tim Tinker, Daniel F. Doak, James A. Estes, Brian B. Hatfield, Michelle M. Steadler, James L. Bodkin
M. Tim Tinker, James A. Estes, Katherine Ralls, Terrie M. Williams, David A. Jessup, Daniel P. Costa, editor(s)
2006, Book chapter, Population dynamics and biology of the California sea otter (<i>Enhydra lutris nereis</i>) at the southern end of its range
1) Better information on historical and current population dynamics is central to understanding patterns of growth and decline in the California sea otter population. We developed a maximum likelihood-based analytical method to estimate historical age/sex specific vital rates as well as spatial and temporal variation in vital rates from longitudinal...
Foraging ecology
M. Tim Tinker, James A. Estes, Michelle Staedler, James L. Bodkin
M. Tim Tinker, James A. Estes, Katherine Ralls, Terrie M. Williams, David A. Jessup, Daniel P. Costa, editor(s)
2006, Book chapter, Population dynamics and biology of the California sea otter (<i>Enhydra lutris nereis</i>) at the southern end of its range
Longitudinal foraging data collected from 60 sea otters implanted with VHF radio transmitters at two study sites in Central California over a three-year period demonstrated even greater individual dietary specialization than in previous studies, with only 54% dietary overlap between individuals and the population.Multivariate statistical analyses indicated that individual diets...
Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004
Timothy P. Brabets, Robert T. Ourso
2006, Scientific Investigations Report 2006-5151
The U.S. Geological Survey and the National Park Service conducted a water-quality investigation of the Crescent River Basin in Lake Clark National Park and Preserve from May 2003 through September 2004. The Crescent River Basin was studied because it has a productive sockeye salmon run that is important to the...
Application of airborne thermal imagery to surveys of Pacific walrus
D. M. Burn, M.A. Webber, Mark S. Udevitz
2006, Wildlife Society Bulletin (34) 51-58
We conducted tests of airborne thermal imagery of Pacific walrus to determine if this technology can be used to detect walrus groups on sea ice and estimate the number of walruses present in each group. In April 2002 we collected thermal imagery of 37 walrus groups in the Bering Sea...
The conservation and population status of the world's waders at the turn of the millennium
David A. Stroud, Andy Baker, D.E. Blanco, Nick C. Davidson, B. Ganter, Robert E. Gill Jr., P.M. Gonzalez, L. Haanstra, R. I. G. Morrison, Theunis Piersma, D. Scott, O. Thorup, R. West, J.L. Wilson, Christoph Zockler
Gerard C. Boere, Colin A. Galbraith, David A. Stroud, editor(s)
2006, Conference Paper, Waterbirds around the world: A global overview of the conservation, management, and research of the world's waterbird flyways
Using information from many sources, but especially data collated for the third edition of Wetlands International’s Waterbird Population Estimates, we review the status of the world’s waders in the late 1990s. There are widespread declines in most regions and biotopes caused principally by loss and degradation of wetland (and other)...
Polar bear research in Alaska
George M. Durner, Steven C. Amstrup, Geoff S. York, Eric V. Regehr, Kristin S. Simac, Tom S. Smith, Steven T. Partridge, Torsten Bentzen, Kristin S. Amstrup, David C. Douglas
Jon Aars, Nicholas J. Lunn, Andrew E. Derocher, editor(s)
2006, Occasional Papers of the IUCN Species Survival Comission (SSC) 32
Since the 13th Working Meeting of the Polar Bear Specialist Group the U.S. Geological Survey (USGS) has seen the completion of many research projects and the start of many new ones. Much has been accomplished and yet we have new challenges awaiting us. This report summarises our focal questions and...
Long-term golden eagle studies in Denali National Park and Preserve
Carol L. McIntyre, Karen Steenhof, Michael N. Kochert, Michael W. Collopy
2006, Alaska Park Science (5) 42-45
Varieties of submarine failure morphologies of seismically-induced landslides in Alaskan fjords
H. Lee, H. Ryan, R. E. Kayen, Peter J. Haeussler, P. Dartnell, M. A. Hampton
2006, Conference Paper, Norsk Geologisk Tidsskrift
The Great Alaska Earthquake of 1964 caused major damage and 43 deaths in the coastal communities of Seward and Valdez. Most of these losses were caused by tsunamis that occurred immediately after the earthquake and were most likely induced by local submarine landslides. Recent NOAA multibcam bathymetric surveys near Seward...
In kittiwakes food availability partially explains the seasonal decline in humoral immunocompetence
J. Gasparini, A. Roulin, V.A. Gill, Scott A. Hatch, T. Boulinier
2006, Functional Ecology (20) 457-463
The immune system plays an important role in fitness, and interindividual variation in immunocompetence is due to several factors including food supply.Seasonal variation in food resources may therefore explain why immunocompetence in bird nestlings usually declines throughout the breeding season, with chicks born early in the season receiving...
Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine volcano, Alaska
P.F. Cervelli, T. Fournier, Jeffrey T. Freymueller, J.A. Power
2006, Geophysical Research Letters (33)
On January 11, 2006 Augustine Volcano erupted after nearly 20 years of quiescence. Global Positioning System (GPS) instrumentation at Augustine, consisting of six continuously recording, telemetered receivers, measured clear precursory deformation consistent with a source of inflation or pressurization beneath the volcano's summit at a depth of around sea level....
Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring
Gail V. Irvine, Daniel H. Mann, Jeffrey W. Short
2006, Marine Pollution Bulletin (52) 1011-1022
Oil stranded as a result of the 1989 Exxon Valdez spill has persisted for >10 years at study sites on Gulf of Alaska shores distant from the spill's origin. These sites were contaminated by "oil mousse", which persists in these settings due to armoring of underlying sediments and their included...
The giant Carlin gold province: A protracted interplay of orogenic, basinal, and hydrothermal processes above a lithospheric boundary
P. Emsbo, D.I. Groves, A. H. Hofstra, F.P. Bierlein
2006, Mineralium Deposita (41) 517-525
Northern Nevada hosts the only province that contains multiple world-class Carlin-type gold deposits. The first-order control on the uniqueness of this province is its anomalous far back-arc tectonic setting over the rifted North American paleocontinental margin that separates Precambrian from Phanerozoic subcontinental lithospheric mantle. Globally, most other significant gold provinces...
Northern goshawk diet during the nesting season in southeast Alaska
S.B. Lewis, K. Titus, M.R. Fuller
2006, Journal of Wildlife Management (70) 1151-1160
[No abstract available]...
Genetic characterization of Zostera asiatica on the Pacific Coast of North America
Sandra L. Talbot, S. Wyllie-Echeverria, David H. Ward, Jolene R. Rearick, George K. Sage, B. Chesney, R. C. Phillips
2006, Aquatic Botany (85) 169-176
We gathered sequence information from the nuclear 5.8S rDNA gene and associated internal transcribed spacers, ITS-1 and ITS-2 (5.8S rDNA/ITS), and the chloroplast maturase K (matK) gene, from Zostera samples collected from subtidal habitats in Monterey and Santa Barbara (Isla Vista) bays, California, to test the hypothesis that these plants are conspecific...
Abrupt transitions during sustained explosive eruptions: Examples from the 1912 eruption of Novarupta, Alaska
N.K. Adams, Bruce F. Houghton, W. Hildreth
2006, Bulletin of Volcanology (69) 189-206
Plinian/ignimbrite activity stopped briefly and abruptly 16 and 45 h after commencement of the 1912 Novarupta eruption defining three episodes of explosive volcanism before finally giving way after 60 h to effusion of lava domes. We focus here on the processes leading to the termination of the second and third...
Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks
R. Kocan, P. Hershberger
2006, Journal of Fish Diseases (29) 497-503
Two genetically distinct populations of chinook salmon, Oncorhynchus tshawytscha (Walbaum), were simultaneously sampled at the confluence of the Yukon and Tanana rivers in 2003. Upper Yukon-Canadian fish had significantly higher infection prevalence as well as more severe infections (higher parasite density in heart tissue) than the lower Yukon-Tanana River fish....
Simulating the influences of various fire regimes on caribou winter habitat
T. Scott Rupp, Mark Olson, Layne G. Adams, Bruce W. Dale, Kyle Joly, Jonathan Henkelman, William B. Collins, Anthony M. Starfield
2006, Ecological Applications (16) 1730-1743
Caribou are an integral component of high‐latitude ecosystems and represent a major subsistence food source for many northern people. The availability and quality of winter habitat is critical to sustain these caribou populations. Caribou commonly use older spruce woodlands with adequate terrestrial lichen, a preferred winter forage, in the understory....
Kittiwakes strategically reduce investment in replacement clutches
J. Gasparini, A. Roulin, V.A. Gill, Scott A. Hatch, T. Boulinier
2006, Proceedings of the Royal Society B: Biological Sciences (273) 1551-1554
Many life-history traits are expressed interactively in life, but to a varying extent on different occasions. Changes in trait expression can be accounted for by differences in the quality of the environment (‘environmental constraint’ hypothesis) or by strategic adjustments, if the relative contribution of the trait to fitness varies with...
New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology
E. L. Miller, J. Toro, G. Gehrels, J.M. Amato, A. Prokopiev, M.I. Tuchkova, V.V. Akinin, T.A. Dumitru, Thomas E. Moore, M.P. Cecile
2006, Tectonics (25)
To test existing models for the formation of the Amerasian Basin, detrital zircon suites from 12 samples of Triassic sandstone from the circum-Arctic region were dated by laser ablation-inductively coupled plasma-mass spectrometry (ICP-MS). The northern Verkhoyansk (NE Russia) has Permo-Carboniferous (265-320 Ma) and Cambro-Silurian (410-505 Ma) zircon populations derived via...
