Publications
USGS research activities relevant to Alaska have yielded more than 9400 historical publications. This page features some of the most recent newsworthy research findings.
Filter Total Items: 2891
Density-dependent effects on growth, body size, and clutch size in Black Brant
We documented gosling size in late summer, adult body size, and clutch size of known-age Black Brant (Branta bernicla nigricans) females nesting on the Tutakoke River colony between 1986 and 1995. During this period, the colony increased from 1,100 to >5,000 nesting pairs. Gosling mass at 30 days of age declined from 764 ± SE of 13 g and 723 ± 15 g for males and females, respectively, in the 1986
Authors
James S. Sedinger, Mark S. Lindberg, Brian T. Person, Michael W. Eichholz, Mark P. Herzog, Paul L. Flint
Hermit crabs in the diet of Pigeon Guillemots at Kachemak Bay, Alaska
Guillemots (Cepphus spp.) feed their chicks a diet that is almost exclusively fish. We observed Pigeon Guillemots (C. columba) at two colonies in Alaska where hermit crabs (Crustacea: Anomura) were a major part of the diet for some nestlings. Hermit crabs were delivered to three of five observed nests at one colony, comprised between 2% and 22% of the items delivered at those nests, and were the s
Authors
Michael A. Litzow, John F. Piatt, Jared D. Figurski
Caribou distribution during the post-calving period in relation to infrastructure in the Prudhoe Bay oil field, Alaska
There is concern that caribou (Rangifer tarandus) may avoid roads and facilities (i.e., infrastructure) in the Prudhoe Bay oil field (PBOF) in northern Alaska, and that this avoidance can have negative effects on the animals. We quantified the relationship between caribou distribution and PBOF infrastructure during the post-calving period (mid-June to mid-August) with aerial surveys from 1990 to 1
Authors
Matthew A. Cronin, Steven C. Amstrup, George M. Durner, Lynn E. Noel, Trent L. McDonald, Warren B. Ballard
Observations of geese foraging for clam shells during spring on the Yukon-Kuskokwim Delta, Alaska
We studied the behavior of geese on exposed river ice during spring on the Yukon-Kuskokwim Delta. The predominant behavior while on the ice for both sexes was foraging; however, females foraged more than males. Visual inspection of the ice revealed no potential plant or animal food items. However, numerous small (<20 mm) clam shells (Macoma balthica) and pieces of shell were noted. It appeared tha
Authors
Paul L. Flint, Ada C. Fowler, Grace E. Bottitta, Jason L. Schamber
Geologic studies in Alaska by the U.S. Geological Survey, 1995
This collection of 20 papers continues the annual series of U.S. Geological Survey (USGS) reports on geologic investigations in Alaska1 . Contributions cover a broad spectrum of earth science topics and report results from all parts of the State (fig. 1).
USGS activities in Alaska include studies of environment and climate, hazards, resources, and geologic framework. Five papers in this volume dis
Alaska resource data file: Sleetmute quadrangle
No abstract available.
Authors
W. J. Keith, Marti L. Miller
A strategy for monitoring glaciers
Glaciers are important features in the hydrologic cycle and affect the volume, variability, and water quality of runoff. Assessing and predicting the effect of glaciers on water resources require a monitoring program to provide basic data for this understanding. The monitoring program of the U.S. Geological Survey employs a nested approach whereby an intensively studied glacier is surrounded by le
Authors
Andrew G. Fountain, Robert M. Krimmel, Dennis C. Trabant
Spatial and temporal variability of microgeographic genetic structure in white-tailed deer
Techniques are described that define contiguous genetic subpopulations of white-tailed deer (Odocoileus virginianus) based on the spatial dispersion of 4,749 individuals that possessed discrete character values (alleles or genotypes) during each of 6 years (1974-1979). White-tailed deer were not uniformly distributed in space, but exhibited considerable spatial genetic structuring. Significant non
Authors
Kim T. Scribner, Michael H. Smith, Ronald K. Chesser
Distribution of autumn-staging Lesser Snow Geese on the northeast coastal plain of Alaska
We conducted aerial surveys of Lesser Snow Geese (Chen caerulescens caerulescens) during autumn staging on the coastal plain of the Arctic National Wildlife Refuge (ANWR) in northeast Alaska from late August through September, 1982 - 1993. We evaluated numbers and distribution of Snow Geese that staged on the ANWR, compared abundance of birds among 5 x 5-km cells used frequently (5 - 8 yr), period
Authors
Donna G. Robertson, Alan W. Brackney, Michael A. Spindler, Jerry W. Hupp
Distribution and stability of eelgrass beds at Izembek Lagoon, Alaska
Spatial change in eelgrass meadows, Zostera marina L., was assessed between 1978 and 1987 and between 1987 and 1995 at Izembek Lagoon, Alaska. Change in total extent was evaluated through a map to map comparison of data interpreted from a 1978 Landsat multi-spectral scanner image and 1987 black and white aerial photographs. A ground survey in 1995 was used to assess spatial change from 1987. Eelgr
Authors
David H. Ward, Carl J. Markon, David C. Douglas
Hematological and plasma biochemical reference ranges of Alaskan seabirds: Their ecological significance and clinical importance
Blood was analyzed from 151 pelagic marine birds to establish reference ranges for hematological and plasma biochemical parameters from healthy, wild populations of Pacific seabirds. Of the 13 species examined, 9 were from the Family Alcidae (N = 122 individuals) and the remainder (N = 29) from the Families Phalacrocoracidae, Laridae, and Procellariidae. Three of 8 hematological parameters (total
Authors
S. H. Newman, John F. Piatt, J. White
Controls on accretion of flysch and melange belts at convergent margins: Evidence from the Chugach Bay thrust and Iceworm melange, Chugach accretionary wedge, Alaska
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. The contact between the McHugh Comple
Authors
Timothy M. Kusky, Dwight Bradley, Peter J. Haeussler, Susan M. Karl