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: 3084
Alaska resource data file: Cold Bay quadrangle Alaska resource data file: Cold Bay quadrangle
No abstract available.
Authors
Frederic H. Wilson
Geologic studies in Alaska by the U.S. Geological Survey, 1995 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...
Alaska resource data file: Sleetmute quadrangle Alaska resource data file: Sleetmute quadrangle
No abstract available.
Authors
W. J. Keith, Marti L. Miller
Testing for handling bias in survival estimation for black brant Testing for handling bias in survival estimation for black brant
We used an ultrastructure approach in program SURVIV to test for, and remove, bias in survival estimates for the year following mass banding of female black brant (Branta bernicla nigricans). We used relative banding-drive size as the independent variable to control for handling effects in our ultrastructure models, which took the form: S = S0(1 - αD), where α was handling effect and D...
Authors
James S. Sedinger, Mark S. Lindberg, Eric A. Rexstad, Nathan Chelgren, David H. Ward
Estimating age of sea otters with cementum layers in the first premolar Estimating age of sea otters with cementum layers in the first premolar
We assessed sources of variation in the use of tooth cementum layers to determine age by comparing counts in premolar tooth sections to known ages of 20 sea otters (Enhydra lutris). Three readers examined each sample 3 times, and the 3 readings of each sample were averaged by reader to provide the mean estimated age. The mean (SE) of known age sample was 5.2 years (1.0) and the 3 mean...
Authors
James L. Bodkin, Jack A. Ames, Ronald J. Jameson, Ancel M. Johnson, Gary M. Matson
A strategy for monitoring glaciers 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...
Authors
Andrew G. Fountain, Robert M. Krimmel, Dennis C. Trabant
Revised geologic map of the Cold Bay and False Pass quadrangles, Alaska Peninsula Revised geologic map of the Cold Bay and False Pass quadrangles, Alaska Peninsula
No abstract available.
Authors
Frederic H. Wilson, Florence R. Weber, Tina M. Dochat, Thomas P. Miller, Robert L. Detterman
Alaska resource data file: Nabesna quadrangle Alaska resource data file: Nabesna quadrangle
No abstract available.
Authors
D.H. Richter
Seabird, marine mammal, and oceanography coordinated investigations (SMMOCI) near Unimak Pass, Alaska Seabird, marine mammal, and oceanography coordinated investigations (SMMOCI) near Unimak Pass, Alaska
No abstract available.
Authors
G. Vernon Byrd, Richard L. Merrick, John F. Piatt, Brenda L. Norcross
Relative effects of survival and reproduction on the population dynamics of emperor geese Relative effects of survival and reproduction on the population dynamics of emperor geese
Populations of emperor geese (Chen canagica) in Alaska declined sometime between the mid-1960s and the mid-1980s and have increased little since. To promote recovery of this species to former levels, managers need to know how much their perturbations of survival and/or reproduction would affect population growth rate (λ). We constructed an individual-based population model to evaluate...
Authors
Joel A. Schmutz, Robert F. Rockwell, Margaret R. Petersen
Echelon approach to areas of concern in synoptic regional monitoring Echelon approach to areas of concern in synoptic regional monitoring
Echelons provide an objective approach to prospecting for areas of potential concern in synoptic regional monitoring of a surface variable. Echelons can be regarded informally as stacked hill forms. The strategy is to identify regions of the surface which are elevated relative to surroundings ( Relative ELEVATIONS or RELEVATIONS). These are areas which would continue to expand as islands...
Authors
Wayne Myers, Ganapati P. Patil, Kyle Joly
The effects of Vexar® seedling protectors on the growth and development of lodgepole pine roots The effects of Vexar® seedling protectors on the growth and development of lodgepole pine roots
The effects on the growth and development of lodgepole pine roots from the Vexar® tubes used to protect seedlings from pocket gopher damage were studied in the Targhee National Forest, Idaho and the Deschutes National Forest, Oregon. At each site, Vexar-protected and unprotected seedlings, with and without above-ground gopher damage were examined after six growing seasons for root...
Authors
Richard M. Engeman, R. Michael Anthony, Heather W. Krupa, James Evans