North Kona slump: Submarine flank failure during the early(?) tholeiitic shield stage of Hualalai Volcano
P. W. Lipman, M.L. Coombs
2006, Journal of Volcanology and Geothermal Research (151) 189-216
The North Kona slump is an elliptical region, about 20 by 60 km (1000-km2 area), of multiple, geometrically intricate benches and scarps, mostly at water depths of 2000–4500 m, on the west flank of Hualalai Volcano. Two dives up steep scarps in the slump area were made in September 2001,...
Piggyback tectonics: Long-term growth of Kilauea on the south flank of Mauna Loa
Peter W. Lipman, Thomas W. Sisson, Michelle L. Coombs, Andrew T. Calvert, Jun-Ichi Kimura
2006, Journal of Volcanology and Geothermal Research (151) 73-108
Compositional and age data from offshore pillow lavas and volcaniclastic sediments, along with on-land geologic, seismic, and deformation data, provide broad perspectives on the early growth of Kilauea Volcano and the long-term geometric evolution of its rift zones. Sulfur-rich glass rinds on pillow lavas and volcaniclastic sediments derived from...
Long-period effects of the Denali earthquake on water bodies in the Puget Lowland: Observations and modeling
A. Barberopoulou, A. Qamar, T. L. Pratt, W. P. Steele
2006, Bulletin of the Seismological Society of America (96) 519-535
Analysis of strong-motion instrument recordings in Seattle, Washington, resulting from the 2002 Mw 7.9 Denali, Alaska, earthquake reveals that amplification in the 0.2-to 1.0-Hz frequency band is largely governed by the shallow sediments both inside and outside the sedimentary basins beneath the Puget Lowland. Sites above the deep sedimentary strata...
Stand and landscape level effects of a major outbreak of spruce beetles on forest vegetation in the Copper River Basin, Alaska
J. L. Allen, S. Wesser, C. J. Markon, K.C. Winterberger
2006, Forest Ecology and Management (227) 257-266
From 1989 to 2003, a widespread outbreak of spruce beetles (Dendroctonus rufipennis) in the Copper River Basin, Alaska, infested over 275,000 ha of forests in the region. During 1997 and 1998, we measured forest vegetation structure and composition on one hundred and thirty-six 20-m ?? 20-m plots to assess both...
Polar bear maternal den habitat in the Arctic National Wildlife Refuge, Alaska
George M. Durner, Steven C. Amstrup, Ken J. Ambrosius
2006, Arctic (59) 31-36
Polar bears (Ursus maritimus) give birth during mid-winter in dens of ice and snow. Denning polar bears subjected to human disturbances may abandon dens before their altricial young can survive the rigors of the Arctic winter. Because the Arctic coastal plain of Alaska is an area of high petroleum potential...
Microsatellite DNA and mitochondrial DNA variation in polar bears (Ursus maritimus) from the Beaufort and Chukchi seas, Alaska
M. A. Cronin, Steven C. Amstrup, K.T. Scribner
2006, Canadian Journal of Zoology (84) 655-660
Radiotelemetry data have shown that polar bears (Ursus maritimus Phipps, 1774) occur in separate subpopulations in the Chukchi Sea and the southern Beaufort Sea. However, segregation is not absolute, and there is overlap of ranges of animals in each subpopulation. We used genetic variation at eight microsatellite DNA loci and...
Deformation driven by subduction and microplate collision: Geodynamics of Cook Inlet basin, Alaska
R.L. Bruhn, Peter J. Haeussler
2006, Geological Society of America Bulletin (118) 289-303
Late Neogene and younger deformation in Cook Inlet basin is caused by dextral transpression in the plate margin of south-central Alaska. Collision and subduction of the Yakutat microplate at the northeastern end of the Aleutian subduction zone is driving the accretionary complex of the Chugach and Kenai Mountains toward the...
Scaphopoda from the Alexander Terrane, Southeast Alaska-The first occurrence of Scaphopoda in the Silurian
D.M. Rohr, R. B. Blodgett, J. Baichtal
2006, Palaeoworld (15) 211-215
The scaphopods Dentalium hecetaensis n. sp. and Rhytiodentalium cf. kentuckyensis Pojeta et Runnegar, 1979, are described from Ludlow-age strata of the Heceta Limestone on Prince of Wales Island, Southeast Alaska. This is the first occurrence of Silurian scaphopods known to date. They are part of a diverse macrobenthic fauna of...
Expressed MHC class II genes in sea otters (Enhydra lutris) from geographically disparate populations
Lizabeth Bowen, B.M. Aldridge, A. Keith Miles, J.L. Stott
2006, Tissue Antigens (67) 402-408
The major histocompatibility complex (MHC) is central to maintaining the immunologic vigor of individuals and populations. Classical MHC class II genes were targeted for partial sequencing in sea otters (Enhydra lutris) from populations in California, Washington, and Alaska. Sequences derived from sea otter peripheral blood leukocyte mRNAs were similar to...
Atmospheric deposition of current-use and historic-use pesticides in snow at National Parks in the Western United States
K.J. Hageman, S.L. Simonich, K. Campbell, G.R. Wilson, D.H. Landers
2006, Environmental Science & Technology (40) 3174-3180
The United States (U.S.) National Park Service has initiated research on the atmospheric deposition and fate of semi-volatile organic compounds in its alpine, sub-Arctic, and Arctic ecosystems in the Western U.S. Results for the analysis of pesticides in seasonal snowpack samples collected in spring 2003 from seven national parks are...
Vascular flora of Izembek National Wildlife Refuge, westernmost Alaska Peninsula, Alaska
Stephen S. Talbot, Sandra Looman Talbot, Wilfred B. Schofield
2006, Rhodora (108) 249-293
The vascular flora of Izembek National Wildlife Refuge (NWR), where few previous collections had been reported, was collected and recorded at sites selected to represent the totality of environmental variation. A total of 349 species (339 native and 10 introduced) was identified. To provide a comparative phytogeographic framework, we analyzed...
Associations between accelerated glacier mass wastage and increased summer temperature in coastal regions
M. Dyurgerov, G.J. McCabe
2006, Arctic, Antarctic, and Alpine Research (38) 190-197
Low-elevation glaciers in coastal regions of Alaska, the Canadian Arctic, individual ice caps around the Greenland ice sheet, and the Patagonia Ice Fields have an aggregate glacier area of about 332 ?? 103 km 2 and account for approximately 42% of all the glacier area outside the Greenland and Antarctic...
Sustained long-period seismicity at Shishaldin Volcano, Alaska
Tanja Petersen, Jacqueline Caplan-Auerbach, Stephen R. McNutt
2006, Journal of Volcanology and Geothermal Research (151) 365-381
From September 1999 through April 2004, Shishaldin Volcano, Aleutian Islands, Alaska, exhibited a continuous and extremely high level of background seismicity. This activity consisted of many hundreds to thousands of long-period (LP; 1–2 Hz) earthquakes per day, recorded by a 6-station monitoring network around Shishaldin. The LP events originate beneath...
Large rock avalanches triggered by the M 7.9 Denali Fault, Alaska, earthquake of 3 November 2002
R.W. Jibson, E. L. Harp, W. Schulz, D. K. Keefer
2006, Engineering Geology (83) 144-160
The moment magnitude (M) 7.9 Denali Fault, Alaska, earthquake of 3 November 2002 triggered thousands of landslides, primarily rock falls and rock slides, that ranged in volume from rock falls of a few cubic meters to rock avalanches having volumes as great as 20 ?? 106 m3. The pattern of...
The influence of fall-spawning coho salmon (Oncorhynchus kisutch) on growth and production of juvenile coho salmon rearing in beaver ponds on the Copper River Delta, Alaska
D.W. Lang, G.H. Reeves, J.D. Hall, M.S. Wipfli
2006, Canadian Journal of Fisheries and Aquatic Sciences (63) 917-930
This study examined the influence of fall-spawning coho salmon (Oncorhynchus kisutch) on the density, growth rate, body condition, and survival to outmigration of juvenile coho salmon on the Copper River Delta, Alaska, USA. During the fall of 1999 and 2000, fish rearing in beaver ponds that received spawning salmon were...
Geochemical evidence for the origin of late Quaternary loess in central Alaska
D.R. Muhs, J. R. Budahn
2006, Canadian Journal of Earth Sciences (43) 323-337
Loess is extensive in central Alaska, but there are uncertainties about its source and the direction of paleo-winds that deposited it. Both northerly and southerly winds have been inferred. The most likely sources of loess are the Tanana River (south), the Nenana River (southeast), and the Yukon River (north). Late...
Effects of abdominally implanted radiotransmitters with percutaneous antennas on migration, reproduction, and survival of Canada geese
Jerry W. Hupp, John M. Pearce, Daniel M. Mulcahy, David A. Miller
2006, Journal of Wildlife Management (70) 812-822
Abdominally implanted radiotransmitters with percutaneous antennas are increasingly used to monitor movements, survival, and reproduction of waterbirds. However, there has been relatively little assessment of the effects of such radios on avian demographic parameters or migration. We implanted either a 26- or 35-g abdominal transmitter with percutaneous antenna in 198...
Genetic and demographic criteria for defining population units for conservation: The value of clear messages
Daniel Esler, S. A. Iverson, D.J. Rizzolo
2006, Condor (108) 480-483
In a recent paper on Harlequin Duck (Histrionicus histrionicus) interannual site fidelity (Iverson et al. 2004), we concluded that wintering populations were demographically structured at a finer geographic scale than that at which genetic differentiation was observed and that conservation efforts should recognize this degree of demographic independence. In a...
Denali fault slip rates and Holocene-late Pleistocene kinematics of central Alaska
A. Matmon, David P. Schwartz, Peter J. Haeussler, R. Finkel, J. J. Lienkaemper, Heidi D. Stenner, T. E. Dawson
2006, Geology (34) 645-648
The Denali fault is the principal intracontinental strike-slip fault accommodating deformation of interior Alaska associated with the Yakutat plate convergence. We obtained the first quantitative late Pleistocene-Holocene slip rates on the Denali fault system from dating offset geomorphic features. Analysis of cosmogenic 10Be concentrations in boulders (n = 27) and...
The transition from explosive to effusive eruptive regime: The example of the 1912 Novarupta eruption, Alaska
N.K. Adams, Bruce F. Houghton, S.A. Fagents, W. Hildreth
2006, Geological Society of America Bulletin (118) 620-634
The shift from explosive to effusive silicic volcanism seen in many historical eruptions reflects a change in the style of degassing of erupted magma. This paper focuses on such a transition during the largest eruption of the twentieth century, the 1912 eruption of Novarupta. The transition is recorded in a...
Traversing a boreal forest landscape: Summer movements of Tule Greater White-fronted Geese
Craig R. Ely, K.S. Bollinger, Jerry W. Hupp, D.V. Derksen, J. Terenzi, John Y. Takekawa, D.L. Orthmeyer, T.C. Rothe, M.J. Petrula, D.R. Yparraguirre
2006, Waterbirds (29) 43-55
We monitored the movement, distribution and site affinities of radio-marked Tule Greater White-fronted Geese (Anser albifrons elgasi) during spring and summer in Alaska, 1994-1997 and 2004. Our assessment of summer movements was comprehensive, as locations were obtained during prenesting, nesting, and molt for over 90% of geese with active radios...
Colony mapping: A new technique for monitoring crevice-nesting seabirds
H.M. Renner, M. Renner, J.H. Reynolds, A.M.A. Harping, I.L. Jones, D.B. Irons, G.V. Byrd
2006, Condor (108) 423-434
Monitoring populations of auklets and other crevice-nesting seabirds remains problematic, although numerous methods have been attempted since the mid-1960s. Anecdotal evidence suggests several large auklet colonies have recently decreased in both abundance and extent, concurrently with vegetation encroachment and succession. Quantifying changes in the geographical extent of auklet colonies may...
A mechanistic link between chick diet and decline in seabirds?
A.S. Kitaysky, E.V. Kitaiskaia, John F. Piatt, J.C. Wingfield
2006, Proceedings of the Royal Society B: Biological Sciences (273) 445-450
A climatic regime shift during the mid-1970s in the North Pacific resulted in decreased availability of lipidrich fish to seabirds and was followed by a dramatic decline in number of kittiwakes breeding on the Pribilof Islands. Although production of chicks in the mid-1970s was adequate to sustain kittiwake populations in...
Interaction Assessment: A modeling tool for predicting population dynamics from field data
John M. Emlen, Jeffrey J. Duda, Matt D. Kirchhoff, D. Carl Freeman
2006, Ecological Modelling (192) 557-570
Interaction Assessment (INTASS) is a field and analytic methodology for constructing population dynamics models. Because data collected in generating a model for one species comprise much of the information needed for other species, a small increase in effort can result in simultaneous expressions for the dynamics of multiple species. These...
Local response of a glacier to annual filling and drainage of an ice-marginal lake
J. S. Walder, D.C. Trabant, M. Cunico, A. G. Fountain, S.P. Anderson, R. Scott Anderson, A. Malm
2006, Journal of Glaciology (52) 440-450
Ice-marginal Hidden Creek Lake, Alaska, USA, outbursts annually over the course of 2-3 days. As the lake fills, survey targets on the surface of the 'ice dam' (the glacier adjacent to the lake) move obliquely to the ice margin and rise substantially. As the lake drains, ice motion speeds up,...
