Stratigraphic and structural implications of conodont and detrital zircon U-Pb ages from metamorphic rocks of the Coldfoot terrane, Brooks Range, Alaska
Thomas E. Moore, J. N. Aleinikoff, A. G. Harris
1997, Journal of Geophysical Research B: Solid Earth (102) 20797-20820
New paleontologic and isotopic data from the Emma Creek and Marion Creek schists of the Coldfoot terrane, Arctic Alaska superterrane, central Brooks Range, suggest Devonian and possibly younger ages of deposition for their sedimentary protoliths. Conodonts from marble of the Emma Creek schist, intruded by a roughly 392 Ma orthogneiss,...
Field guide to the Mesozoic accretionary complex along Turnagain Arm and Kachemak Bay, south-central Alaska
Dwight Bradley, Timothy M. Kusky, Susan M. Karl, Peter J. Haeussler
1997, Book chapter, 1997 Guide to the geology of the Kenai Peninsula. Alaska
Turnagain Arm, just east of Anchorage, provides a readily accessible, world-class cross section through a Mesozoic accretionary wedge. Nearly continuous exposures along the Seward Highway, the Alaska Railroad, and the shoreline of Turnagain Arm display the two main constituent units of the Chugach terrane: the McHugh Complex and Valdez Group....
Ecosystem development on terraces along the Kugururok River, northwest Alaska
Dan Binkley, F. Suarez, R. Stottlemyer, B. Caldwell
1997, Écoscience (4) 311-318
Riverside terraces along the Kugururok River in the Noatak National Preserve provided an opportunity to study primary succession, considering general trends that apply across all terraces, and unique events that influence individual terraces. The 30-year-old willow/poplar (Salix spp., Populus balsamifera L.) terrace had no trees taller than 1.5 m; the...
Effects of spring environment on nesting phenology and clutch size of Black Brant
M. S. Lindberg, J.S. Sedinger, Paul L. Flint
1997, Condor (99) 381-388
We studied the effects of timing of spring snowmelt on nesting phenology, nest site selection, and clutch size of Black Brant (Branta bernicla nigricans) breeding at the Tutakoke river colony, Yukon-Kuskokwim Delta, Alaska. In late springs, brant nested later: however, time between peak arrival at Tutakoke and nest initiation (6...
Migration by radio-tagged pacific golden-plovers from hawaii to Alaska, and their subsequent survival
O.W. Johnson, N. Warnock, M.A. Bishop, A.J. Bennett, P.M. Johnson, R.J. Kienholz
1997, The Auk (114) 521-524
Many Pacific Golden-Plovers (Pluvialis fulva) and other shorebirds winter in the Hawaiian Islands. This is the first landfall for mid-Pacific migrants after overwater flights of 4,000 km or more from Alaska (Johnson et al. 1989, Johnson and Connors 1996). Previous findings (sightings of marked birds and wing-length measurements) showed Alaska...
Exposure of Spectacled Eiders and other diving ducks to lead in western Alaska
Paul L. Flint, Margaret R. Petersen, J. Barry Grand
1997, Canadian Journal of Zoology (75) 439-443
Lead poisoning, resulting from ingestion of spent shot, has been identified as a cause of mortality in Spectacled Eiders (Somateria fischeri) on the Yukon–Kuskokwim Delta, Alaska. We examined lead-exposure rates of adult and juvenile Spectacled Eiders and other diving ducks, using atomic absorption spectrophotometry of blood samples. Additionally, we X-rayed...
Population genetic studies of the sea otter (Enhydra lutris): A review and interpretation of available data
Kim T. Scribner, James L. Bodkin, Brenda E. Ballachey, Steven R. Fain, Matthew A. Cronin, Maria D. Sanchez
Andrew E. Dixon, Susan J. Chivers, William F. Perrin, editor(s)
1997, Conference Paper, Molecular genetics of marine mammals: Incorporating the proceedings of a workshop on the analysis of genetic data to address problems of stock identity as related to management of marine mammals
Current information about the utility of genetic markers for estimating population structuring in sea otters (Enhydra lutris) is reviewed. Analyses of spatial population structuring with biochemical and molecular genetic markers are discussed in the context of the species' ecology and history of exploitation. Studies that have used a diversity of...
Hydrocarbon residues in tissues of sea otters (Enhydra lutris) collected from southeast Alaska
Brenda E. Ballachey, Kimberly A. Kloecker
1997, Report MMS 6-2
No abstract available....
Crustal implications of bedrock geology along the Trans-Alaska Crustal Transect (TACT) in the Brooks Range, northern Alaska
Thomas E. Moore, W. K. Wallace, C. G. Mull, K.E. Adams, George Plafker, W. J. Nokleberg
1997, Journal of Geophysical Research B: Solid Earth (102) 20645-20684
Geologic mapping of the Trans-Alaska Crustal Transect (TACT) project along the Dalton Highway in northern Alaska indicates that the Endicott Mountains allochthon and the Hammond terrane compose a combined allochthon that was thrust northward at least 90 km in the Early Cretaceous. The basal thrust of the combined allochthon climbs...
Aerial videography for estimating goose populations staging in Izembek Lagoon, Alaska
R.M. Anthony, R.A. Stehn, W.H. Anderson
1997, Conference Paper, Proceedings of the 16th biennial workshop on color photography and videography in resource assessment
We conducted experimental photographic surveys of black brant and Canada geese in a pre-migration staging area on the Alaska Peninsula to compare precision and efficiency of this technique to currently employed ocular estimates. Video and digital cameras sensitive to near infrared and visible radiation were tested at various altitudes and...
Acanthocephala of the bald eagle (Haliaeetus leucocephalus) in North America
D.J. Richardson, Rebecca A. Cole
1997, Journal of Parasitology (83) 540-541
Examination of bald eagles (Haliaeetus leucocephalus) collected from several locations in North America contributed new information concerning the acanthocephalan fauna of this host. Representatives of Arythmorhynchus brevis, representing a new host record, were collected from eagles in Florida, New Hampshire, and Wisconsin. Plagiorhynchus sp. was collected from an eagle in...
Migration behavior of tundra swans from the Yukon-Kuskokwim Delta, Alaska
Craig R. Ely, David C. Douglas, A. C. Fowler, Colleen A. Babcock, D.V. Derksen, John Y. Takekawa
1997, The Wilson Bulletin (109) 679-692
Home ranges and movements of arctic fox (Alopex lagopus) in western Alaska
R. Michael Anthony
1997, Arctic (50) 147-157
During the period from 1985 to 1990, radio collars were attached to 61 arctic foxes (Alopex lagopus) in the coastal region of the Yukon-Kuskokwim Delta in western Alaska. Radio tracking using hand-held receivers from aircraft and from fixed towers was conducted to determine daily and seasonal movements of foxes. Intensive...
Hydrocarbon residues in tissues of sea otters (Enhydra lutris) collected following the Exxon Valdez Oil Spill
Brenda E. Ballachey, Kimberly A. Kloecker
1997, Report MMS 6-16
No abstract available....
Hydrocarbons in hair, livers, and intestines of sea otters (Enhydra lutris) found dead along the path of the Exxon Valdez oil spill
Brenda E. Ballachey, Kimberly A. Kloecker
1997, Report MMS 6-3
No abstract available....
Tectonic evolution of the central Brooks Range mountain front: Evidence from the Atigun Gorge region
C. G. Mull, R.K. Glenn, K.E. Adams
1997, Journal of Geophysical Research B: Solid Earth (102) 20749-20772
Atigun Gorge, at the northern front of the eastern Endicott Mountains, contains well-exposed rocks of the upper part of the Endicott Mountains allochthon and rocks of the structurally higher Picnic Creek or Ipnavik River allochthon. These allochthons contain rocks as young as Early Cretaceous (Valanginian) and are separated by a...
Permian Tethyan Fusulinina from the Kenai Peninsula, Alaska
C.H. Stevens, V.I. Davydov, D. Bradley
1997, Journal of Paleontology (71) 985-994
Two samples from a large, allochthonous limestone block in the McHugh Complex of the Chugach terrane on the Kenai Peninsula, Alaska, contain species of 12 genera of Permian Fusulinina including Abadehella, Kahlerina, Pseudokahlerina?, Nankinella, Codonofusiella, Dunbarula, Parafusulina?, Chusenella, Verbeekina, Pseudodoliolina, Metadoliolina?, Sumatrina?, and Yabeina, as well as several...
Controls on accretion of flysch and melange belts at convergent margins: Evidence from the Chugach Bay thrust and Iceworm melange, Chugach accretionary wedge, Alaska
Timothy M. Kusky, Dwight Bradley, Peter J. Haeussler, Susan M. Karl
1997, Tectonics (16) 855-878
Controls on accretion of flysch and mélange terranes at convergent margins are poorly understood. Southern Alaska's Chugach terrane forms the outboard accretionary margin of the Wrangellia composite terrane, and consists of two major lithotectonic units, including Triassic-Cretaceous mélange of the McHugh Complex and Late Cretaceous flysch of the Valdez Group....
Permian deposition in the north central Brooks Range, Alaska: Constraints for tectonic reconstructions
K.E. Adams, C. G. Mull, R.K. Crowder
1997, Journal of Geophysical Research B: Solid Earth (102) 20727-20748
Two opposing tectonic models have been offered to explain the regional structural relations in the north central Brooks Range fold-thrust belt of northern Alaska. The first suggests that rocks of the northern Endicott Mountains were thrust from south to north over the area of the present Mount Doonerak high and...
An integrated model for the tectonic development of the frontal Brooks Range and Colville Basin 250 km west of the Trans-Alaska Crustal Transect
F. Cole, K. J. Bird, J. Toro, F. Roure, P. B. O’Sullivan, M. Pawlewicz, D. G. Howell
1997, Journal of Geophysical Research B: Solid Earth (102) 20685-20708
We present a kinematic model for the sequence of deformation and sedimentation in the frontal Brooks Range and adjacent Colville Basin in the Etivluk River region, 250 km west of the Trans-Alaska Crustal Transect (TACT). The model is based on a tectonic subsidence analysis of the foreland basin, combined with...
Grizzly bear predation rates on caribou calves in northeastern Alaska
Donald D. Young Jr., Thomas R. McCabe
1997, Journal of Wildlife Management (61) 1056-1066
During June 1993 and 1994, 11 radiocollared and 7 unmarked grizzly bears (Ursus arctos) were monitored visually (observation) from fixed-wing aircraft to document predation on calves of the Porcupine Caribou (Rangifer tarandus) Herd (PCH) in northeastern Alaska. Twenty-six (72%) grizzly bear observations were completed (???60 min) successfully (median duration =...
Recovery strategies for the California clapper rail (Rallus longirostris obsoletus) in the heavily-urbanized San Francisco estuarine ecosystem
Theodore C. Foin, E. Jacqueline Garcia, Robert E. Gill Jr., Steven D. Culberson, Joshua N. Collins
1997, Landscape and Urban Planning (38) 229-243
The California clapper rail (Rallus longirostris obsoletus), a Federal- and State-listed endangered marsh bird, has a geographic range restricted to one of the most heavily-urbanized estuaries in the world. The rail population has long been in a state of decline, although the exact contribution of each of the many contributing...
Soluble trace elements and total mercury in Arctic Alaskan snow
E. Snyder-Conn, John R. Garbarino, Gerald L. Hoffman, A. Oelkers
1997, Arctic (50) 201-215
Ultraclean field and laboratory procedures were used to examine trace element concentrations in northern Alaskan snow. Sixteen soluble trace elements and total mercury were determined in snow core samples representing the annual snowfall deposited during the 1993-94 season at two sites in the Prudhoe Bay oil field and nine sites...
A watershed approach to ecosystem monitoring in Denali National Park and preserve, Alaska
L.K. Thorsteinson, D.L. Taylor
1997, Journal of the American Water Resources Association (33) 795-810
The National Park Service and the National Biological Service initiated research in Denali National Park and Preserve, a 2.4 million-hectare park in southcentral Alaska, to develop ecological monitoring protocols for national parks in the Arctic/Subarctic biogeographic area. We are focusing pilot studies on design questions, on scaling issues and regionalization,...
Persistence rates and detection probabilities of oiled king eider carcasses on St Paul Island, Alaska
A. C. Fowler, Paul L. Flint
1997, Marine Pollution Bulletin (34) 522-526
Following an oil spill off St Paul Island, Alaska in February 1996, persistence rates and detection probabilities of oiled king eider (Somateria spectabilis) carcasses were estimated using the Cormack-Jolly-Seber model. Carcass persistence rates varied by day, beach type and sex, while detection probabilities varied by day and beach type. Scavenging,...
