Contaminants and sea ducks in Alaska and the circumpolar region
Charles Henny, Deborah D. Rudis, Thomas J. Roffe, Everett Robinson-Wilson
1995, Environmental Health Perspectives (103) 41-49
We review nesting sea duck population declines in Alaska during recent decades and explore the possibility that contaminants may be implicated. Aerial surveys of the surf scoter (Melanitta perspicillata), white-winged scoter (M. fusca), black scoter (M. nigra), oldsqaw (Clangula hyemalis), spectacled eider (Somateria fischeri), and Steller's eider (Polysticta stellei) show...
Bald eagles kleptoparasitizing sea otters at Amchitka Island, Alaska
Jon Watt, Bernhard Krausse, M. Tim Tinker
1995, Condor (97) 588-590
No abstract available....
Low-grade, M1 metamorphism of the Douglas Island Volcanics, western metamorphic belt near Juneau, Alaska
Glen R. Himmelberg, David A. Brew, Arthur B. Ford
1995, GSA Special Papers (51) 51-66
The western metamorphic belt is part of the Coast plutonic-metamorphic complex of western Canada and southeastern Alaska that developed during collision of the Alexander terrane and Gravina assemblage on the west against the Yukon Prong and Stikine terranes to the east. Deformation, metamorphism, and plutonism range from about 120 to...
Seismic refraction measurements within the Peninsular terrane, south central Alaska
Elizabeth L. Ambos, Walter D. Mooney, Gary S. Fuis
1995, Journal of Geophysical Research (100) 4079-4095
We present an interpretation of crustal seismic refraction data from the Peninsular terrane, one of the many exotic terranes that have been accreted to the continental margin of southern Alaska in the past 200 m.y. A seismic refraction line was collected along the Glenn Highway in the...
Guide to the volcanoes of the western Wrangell Mountains, Alaska; Wrangell-St. Elias National Park and Preserve
Donald H. Richter, Danny S. Rosenkrans, Margaret J. Steigerwald
1995, Bulletin 2072
No abstract available....
The Alaska Mineral Resource Assessment Program: Background information to accompany geologic and mineral-resource maps of the Killik River 1°x3° quadrangle, northern Alaska
Karen D. Kelley, Charles G. Mull
1995, Circular 1117
This report summarizes results of integrated geological, geochemical, and geophysical field and laboratory studies conducted by the U.S. Geological Survey in the Killik River 1°x3° quadrangle, Brooks Range, northern Alaska. These studies were designed to provide an assessment of the mineral resources of the quadrangle. The geological and geochemical data...
Mineralogical maps showing the distribution of ore-related minerals in the minus-30-mesh, nonmagnetic heavy-mineral fraction of stream sediment, Healy Quadrangle, Alaska
Richard B. Tripp, Harley D. King, Thomas D. Light
1995, Miscellaneous Field Studies Map 2058-D
A reconnaissance mineralogical and geochemical survey of stream sediments in the Healy quadrangle was conducted during 1980-1982 as part of the Alaskan Mineral Resource Assessment Program (AMRAP) of the United States Geological Survey (USGS). As a result of the various AMRAP investigations, a mineral resource evaluation of the quadrangle was...
Ubiquitous tar balls with a California-source signature on the shorelines of Prince William Sound, Alaska
Keith A. Kvenvolden, Frances D. Hostettler, P.R. Carlson, John B. Rapp, C. N. Threlkeld, Augusta Warden
1995, Environmental Science & Technology (29) 2684-2694
Although the shorelines of Prince William Sound still bear traces of the 1989 Exxon Valdez oil spill, most of the flattened tar balls that can be found today on these shorelines are not residues of Exxon Valdez oil. Instead, the carbon-isotopic and hydrocarbonbiomarker signatures of 61 tar ball samples, collected...
Geochemical survey of the Valdez 1° x 3° quadrangle, south-central Alaska
R.J. Goldfarb, J. Carter Borden, Gary R. Winkler
1995, Bulletin 2084
No abstract available....
Late Pleistocene and Holocene paleoenvironments of the North Pacific coast
D.H. Mann, T. D. Hamilton
1995, Quaternary Science Reviews (14) 449-471
Unlike the North Atlantic, the North Pacific Ocean probably remained free of sea ice during the last glacial maximum (LGM), 22,000 to 17,000 BP. Following a eustatic low in sea level of ca. −120 m at 19,000 BP, a marine transgression had flooded the Bering and Chukchi shelves by 10,000...
Metamorphic and structural history of continental crust at a Mesozoic collisional margin, the Ruby terrane, central Alaska
S. M. Roeske, Cynthia Dusel-Bacon, John N. Aleinikoff, L.W. Snee, Marvin A. Lanphere
1995, Journal of Metamorphic Geology (13) 25-40
The Ruby terrane is an elongate fragment of continental crustal rocks that is structurally overlain by thrust slices of oceanic crust. Our results from the Kokrines Hills, in the south‐central part of the Ruby terrane, demonstrate that the low‐angle schistose fabric formed under high‐P/low‐T conditions, at peak conditions of 10.8‐13.2 kbar...
Response of northern pintail breeding populations to drought, 1961-1992
Jay B. Hestbeck
1995, Journal of Wildlife Management (59) 9-15
According to data from the 1960s, northern pintails (Anas acuta) fly north of the Alberta and Saskatchewan prairies during drought resulting in decreasing pintail annual production. Reanalysis of overflight and reduced-production hypotheses using data from 1961-92 indicated that, although the same basic relationships were present, these relationships changed over time....
Geochemical evaluation of coal from the Tertiary Usibelli Group, Usibelli mine, Alaska, one of the lowest sulfur coals mined in the United States
Ronald H. Affolter, Gary D. Stricker, Richard G. Stanley
1995, Conference Paper, Proceedings, Focus on Alaska Coal 1993: Mineral Industry Research Laboratory Report 94
The Nenana coal basin extends 240 km in length and 1.5-50 krn in width along the northern foothills of the Alaska Range in central Alaska. Located at the western end of the Nenana basin is the Usibelli Coal Mine, approximately 120 km southwest of Fairbanks. The Tertiary Usibelli Group consists...
Decline of northern pintails
Jay B. Hestback
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
The size of the continental breeding population of northern pintail (Anas acuta) has greatly varied since 1955, with numbers in surveyed areas ranging from a high of 9.9 million to a low of 1.8 million in 1991. This variation results primarily from differences in the numbers of breeding pintails in...
Subduction cycles under western North America during the Mesozoic and Cenozoic eras
Peter L. Ward
David M. Miller, Cathy Busby, editor(s)
1995, Book chapter, Jurassic magmatism and tectonics of the North American cordillera
An extensive review of geologic and tectonic features of western North America suggests that the interaction of oceanic plates with the continent follows a broad cyclical pattern. In a typical cycle, periods of rapid subduction (7–15 cm/yr), andesitic volcanism, and trench-normal contraction are followed by a shift to trench-normal extension,...
Seabirds in Alaska
Scott A. Hatch, John F. Piatt
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
About 100 million seabirds reside in marine waters of Alaska during some part of the year. Perhaps half this population is composed of 50 species of nonbreeding residents, visitors, and breeding species that use marine habitats only seasonally (Gould et al. 1982). Another 30 species include 40-60 million individuals that...
North American ducks
David F. Caithamer, Graham W. Smith
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
Increased predation and habitat degradation and destruction coupled with drought, especially on breeding grounds, have caused the declines of some duck populations. More than 30 species of fucks breed in North America, in areas as diverse as the Arctic tundra and the subtropics of Florida and Mexico. For many of...
Arctic nesting geese: Alaskan populations
Jerry W. Hupp, Robert A. Stehn, Craig R. Ely, Dirk V. Derksen
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
North American populations of most goose species have remained stable or have increased in recent decades (USFWS and Canadian Wildlife Service 1986). Some populations, however, have declined or historically have had small numbers of individuals, and thus are of special concern. Individual populations of geese should be maintained to ensure...
Northern Pintail (Anas acuta)
J. E. Austin, M. R. Miller
A. Poole, F. Gill, editor(s)
1995, Book chapter, The Birds of North America
The Northern Pintail is a medium-sized dabbling duck of slender, elegant lines and conservative plumage coloration. It 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...
Sea otters in the northern Pacific Ocean
James L. Bodkin, Ronald J. Jameson, James A. Estes
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
About 250 years ago sea otters (Enhydra lutris) were distributed continuously from central Baja California, north and west along the Pacific Rim to Machatka Peninsula in Russia, and south along the Kuril Island to northern Japan (Kenyon 1969; Fig. 1a). Several hundred thousand sea otters may have occurred in the...
ENSO events in the northern Gulf of Alaska, and effects on selected marine fisheries
K.M. Bailey, S.A. Macklin, R.K. Reed, R.D. Brodeur, W.J. Ingraham, John F. Piatt, M. Shima, R.C. Francis, P.J. Anderson, T.C. Royer, A. Hollowed, D.A. Somerton, W.S. Wooster
1995, Report
The 1991-93 El Nino-Southern Oscillation (ENSO) event first appeared in the northern Gulf of Alaska in autumn 1991 with warm sea-surface temperatures. In winter 1992, there were pulses of increased sea level and anomalous circulation. El Nino conditions persisted at least through summer 1993. The effects of this ENSO event...
Movements, distribution, and population dynamics of polar bears in the Beaufort Sea
Steven C. Amstrup
1995, Thesis
Nearshore distribution and abundance of Dungeness crabs in Glacier Bay National Park, Alaska
Charles E. O’Clair, J. Lincoln Freese, Robert P. Stone, Thomas C. Shirley, Erica H. Leder, S. James Taggart, Gordon H. Kruse
Daniel R. Engstrom, editor(s)
1995, Conference Paper, Proceedings of the third Glacier Bay science symposium
As part of an ongoing, multi-agency study to determine the effects of closure of the commercial fishery for Dungeness crabs, Cancer magister, on crab population structure we examined patterns of distribution and abundance of crabs in nearshore habitats at five locations in and near Glacier Bay National Park. Sampling was...
Morphological differences in Pacific Coast populations of greater white-fronted geese
D.L. Orthmeyer, John Y. Takekawa, Craig R. Ely, M. Wege, W.E. Newton
1995, Condor (97) 123-132
We examined morphological relationships of three Pacific coast populations of Greater White-fronted Geese (Anser albifrons). Adult geese were captured and measured at three breeding areas in Alaska and two wintering areas in California, 1980-1991. A two-step discriminant function analysis examined morphological differences among the three populations. Stepwise discriminant function procedures...
Sea otters and kelp forests in Alaska: Generality and variation in a community ecological paradigm
J. A. Estes, D. O. Duggins
1995, Ecological Monographs (65) 75-100
Multiscale patterns of spatial and temporal variation in density and population structure were used to evaluate the generality of a three—trophic—level cascade among sea otters (Enhydra lutris), invertebrate herbivores, and macroalgae in Alaska. The paradigm holds that where sea otters occur herbivores are rare and plants are abundant, whereas when...
