Population structure of Pacific Common Eiders breeding in Alaska
Margaret R. Petersen, Paul L. Flint
2002, Condor (104) 780-787
We used satellite telemetry to study the migration routes and wintering areas of two allopatric breeding populations of Pacific Common Eiders (Somateria mollissima v-nigrum) in Alaska: the Yukon-Kuskokwim Delta, and the western Beaufort Sea coast. Only 6% (2 of 36) of females wintered within the wintering area of the other...
The utility of estimating net primary productivity over Alaska using baseline AVHRR data
C. J. Markon, Kim M. Peterson
2002, International Journal of Remote Sensing (23) 4571-4596
Net primary productivity (NPP) is a fundamental ecological variable that provides information about the health and status of vegetation communities. The Normalized Difference Vegetation Index, or NDVI, derived from the Advanced Very High Resolution Radiometer (AVHRR) is increasingly being used to model or predict NPP, especially over large remote areas....
Variation in foraging behavior and body mass in broods of Emperor Geese (Chen canagica): Evidence for interspecific density dependence
Joel A. Schmutz, K.K. Laing
2002, The Auk (119) 996-1009
Broods of geese spend time feeding according to availability and quality of food plants, subject to inherent foraging and digestive constraints. We studied behavioral patterns of broods of Emperor Geese (Chen canagica) on the Yukon–Kuskokwim Delta, Alaska, and examined how feeding and alert behavior varied in relation to habitat and...
Magma storage prior to the 1912 eruption at Novarupta, Alaska
J.E. Hammer, M.J. Rutherford, W. Hildreth
2002, Contributions to Mineralogy and Petrology (144) 144-162
New analytical and experimental data constrain the storage and equilibration conditions of the magmas erupted in 1912 from Novarupta in the 20th century's largest volcanic event. Phase relations at H2O+CO2 fluid saturation were determined for an andesite (58.7 wt% SiO2) and a dacite (67.7 wt%) from the compositional extremes of...
Holocene tephrochronology of the Cold Bay area, southwest Alaska Peninsula
E.C. Carson, J.H. Fournelle, T. P. Miller, D.M. Mickelson
2002, Quaternary Science Reviews (21) 2213-2228
The major-element glass geochemistry of 92 tephra samples from the southwest Alaska Peninsula provides the basis for establishing a Holocene tephrochronology for the region. Electron microprobe analysis has been combined with field descriptions of samples, stratigraphic relationships between tephra samples and sample localities, and glass shard micro-morphology to correlate these...
Reduction of provisioning effort in response to experimental manipulation of chick nutritional status in the Horned Puffin
A.M.A. Harding, Thomas I. van Pelt, John F. Piatt, A.S. Kitaysky
2002, Condor (104) 842-847
Using a supplemental feeding experiment, we investigated the ability of adult Horned Puffins to decrease provisioning effort in response to reduced nutritional requirements of chicks. We found no difference between experimental and control groups in parental provisioning before supplementary feeding was initiated. After receiving supplemental food for seven days, experimental...
Anesthesia and liver biopsy techniques for pigeon guillemots (Cepphus columba) suspected of exposure to crude oil in marine environments
Laurel A. Degernes, Craig A. Harms, Gregory H. Golet, Daniel M. Mulcahy
2002, Journal of Avian Medicine and Surgery (16) 291-299
This paper reports on the anesthesia and liver biopsy techniques used in adult and nestling pigeon guillemots (Cepphus columba) to test for continued exposure to residual crude oil in the marine environment. Populations of pigeon guillemots have declined significantly in Prince William Sound, Alaska, USA, possibly because of residual effects...
Performance of a satellite-linked GPS on Pacific walruses (Odobenus rosmarus divergens)
Chadwick V. Jay, Gerald W. Garner
2002, Polar Biology (25) 235-237
We evaluated the utility of a satellite-linked GPS in obtaining location data from Pacific walruses (Odobenus rosmarus divergens). A unit was attached to one of the tusks of each of three adult male walruses in Bristol Bay, Alaska. The units were designed to relay GPS positions through the Argos Data...
Nitrogen dynamics in an Alaskan salt marsh following spring use by geese
Amy B. Zacheis, Roger W. Ruess, Jerry W. Hupp
2002, Oecologia (130) 600-608
Lesser snow geese (Anser caerulescens caerulescens) and Canada geese (Branta canadensis) use several salt marshes in Cook Inlet, Alaska, as stopover areas for brief periods during spring migration. We investigated the effects of geese on nitrogen cycling processes in Susitna Flats, one of the marshes. We...
Temporal variations of natural and anthropogenic radionuclides in sea otter skull tissue in the North Pacific Ocean
M. Baskaran, G.-H. Hong, S. Dayton, James L. Bodkin, J.J. Kelley
2002, Journal of Environmental Radioactivity (64) 1-18
Marine mammals being among the top predators in the food web tend to accumulate organic and inorganic contaminants from the environment. The body burden of contaminants in these species could reflect their foods and thus contaminant levels could serve as proxies on the changes of ecosystem. A pilot study was...
Does food availability affect energy expenditure rates of nesting seabirds? A supplemental-feeding experiment with Black-Legged Kittiwakes (Rissa tridactyla)
Patrick G.R. Jodice, Daniel D. Roby, Scott A. Hatch, Verena A. Gill, Richard B. Lanctot, G. Henk Visser
2002, Canadian Journal of Zoology (80) 214-222
We used a supplemental-feeding experiment, the doubly labeled water technique, and a model-selection approach based upon the Akaike Information Criterion to examine effects of food availability on energy expenditure rates of Black-legged Kittiwakes (Rissa tridactyla) raising young. Energy expenditure rates of supplementally fed females (n = 14) and males (n...
Evaluation of terrestrial carbon cycle models with atmospheric CO2 measurements: Results from transient simulations considering increasing CO2, climate, and land-use effects
R.J. Dargaville, Martin Heimann, A. D. McGuire, I. C. Prentice, D. W. Kicklighter, F. Joos, Joy S. Clein, G. Esser, J. Foley, J. Kaplan, R.A. Meier, J. M. Melillo, B. Moore III, N. Ramankutty, T. Reichenau, A. Schloss, S. Sitch, H. Tian, L.J. Williams, U. Wittenberg
2002, Global Biogeochemical Cycles (16) 39-1-39-15
An atmospheric transport model and observations of atmospheric CO2 are used to evaluate the performance of four Terrestrial Carbon Models (TCMs) in simulating the seasonal dynamics and interannual variability of atmospheric CO2 between 1980 and 1991. The TCMs were forced with time varying atmospheric CO2 concentrations, climate, and land use to simulate the...
Sea otter (Enhydra lutris) perspective: Part A. Sea otter population status and the process of recovery from the 1989 Exxon Valdez oil spill
James L. Bodkin, Brenda E. Ballachey, Thomas A. Dean, Allan K. Fukuyama, Stephen C. Jewett, Lyman L. McDonald, Daniel H. Monson, Charles E. O’Clair, Glenn R. VanBlaricom
Leslie E. Holland-Bartels, editor(s)
2002, Report, Mechanisms of impact and potential recovery of nearshore vertebrate predators following the 1989 <i>Exxon Valdez</i> oil spill
Sea otter (Enhydra lutris) populations were severely affected by the 1989 Exxon Valdez oil spill in western Prince William Sound, AK, and had not fully recovered by 2000. Here we present results of population surveys and incorporate findings from related studies to identify current population status and factors affecting recovery....
Evaluating the impacts of wildland fires on caribou in interior Alaska
Kyle Joly, Layne G. Adams, Bruce W. Dale, William Collins
2002, Arctic Research of the United States (16) 63-67
Caribou are found throughout the boreal forests of interior Alaska, a region subject to chronic and expansive wildland fires. Fruticose lichens, if available, constitute the majority of the winter diet of caribou throughout their range and are common in mature boreal forests but largely absent from early successional stages. Fire,...
Forage quantity and quality
Janet C. Jorgenson, Mark S. Udevitz, Nancy A. Felix
David C. Douglas, Patricia E. Reynolds, E. B. Rhode, editor(s)
2002, Biological Science Report 2002-0001-5
The Porcupine caribou herd has traditionally used the coastal plain of the Arctic National Wildlife Refuge, Alaska, for calving. Availability of nutritious forage has been hypothesized as one of the reasons the Porcupine caribou herd migrates hundreds of kilometers to reach the coastal plain for calving (Kuropat and Bryant 1980,...
Persistent organic pollutants in murre eggs from the Gulf of Alaska and Bering Sea
John R. Kucklick, Stacy S. Vander Pol, P.R. Becker, Rebecca S. Pugh, Kristin S. Simac, G.W. York, D.G. Rosenau
2002, Conference Paper, Proceedings: 22nd international symposium on halogenated environmental organic pollutants and persistent organic pollutants (POPs)
No abstract available....
Ecological perspectives on Pacific salmon: Can we sustain biodiversity and fisheries?
E. Eric Knudsen
Kristine D. Lynch, Michael L. Jones, William W. Taylor, editor(s)
2002, Book chapter, Sustaining North American salmon: Perspectives across regions and disciplines
No abstract available....
Response of a subarctic salt marsh plant community to grubbing and grazing by captive lesser snow geese
Amy B. Zacheis, Jerry W. Hupp, Roger W. Ruess
2002, Écoscience (9) 320-331
Foraging intensity and faecal inputs are important determinants of plant community response to herbivory. We used captive adult lesser snow geese (Anser caerulescens caerulescens), which feed on both above- and below-ground plant tissues, to manipulate foraging intensity and faecal inputs to plots in a sedge meadow in spring, 1996. We...
Growth and abundance of Pacific Sand Lance, Ammodytes hexapterus, under differing oceanographic regimes
Martin D. Robards, Floyd Gray, John F. Piatt
2002, Environmental Biology of Fishes (64) 429-441
Dramatic changes in seabird and marine mammal stocks in the Gulf of Alaska have been linked to shifts in abundance and composition of forage fish stocks over the past 20 years. The relative value (e.g., size and condition of individual fish, abundance) of specific forage fish stocks to predators under...
Life and death of the Resurrection Plate
Peter J. Haeussler, D. C. Bradley, R.E. Wells, Marti L. Miller
2002, Newsletter of the Alaska Geological Society (31) 1-1
No abstract available....
Satellite imagery characterizes local animal reservoir populations of Sin Nombre virus in the southwestern United States
Gregory E. Glass, Terry L. Yates, Joshua B. Fine, Timothy M. Shields, John B. Kendall, Andrew G. Hope, Cheryl A. Parmenter, C.J. Peters, Thomas G. Ksiazek, Chung-Sheng Li, Jonathan A. Patz, James N. Mills
2002, Proceedings of the National Academy of Sciences of the United States of America (99) 16817-16822
The relationship between the risk of hantaviral pulmonary syndrome (HPS), as estimated from satellite imagery, and local rodent populations was examined. HPS risk, predicted before rodent sampling, was highly associated with the abundance of Peromyscus maniculatus, the reservoir of Sin Nombre virus (SNV). P. maniculatus were common in high-risk sites,...
Food limitation and the recovery of sea otters following the 'Exxon Valdez' oil spill
Thomas A. Dean, James L. Bodkin, Allan K. Fukuyama, Stephen C. Jewett, Daniel H. Monson, Charles E. O’Clair, Glenn R. VanBlaricom
2002, Marine Ecology Progress Series (241) 255-270
We examined the potential role of food limitation in constraining the recovery of sea otters Enhydra lutris in Prince William Sound, Alaska, following the 'Exxon Valdez' oil spill. The spill resulted in the removal of a large number of sea otters in 1989, and as of 1998, the portion of...
Using satellite telemetry to define spatial population structure in polar bears in the Norwegian and western Russian Arctic
Mette Mauritzen, Andrew E. Derocher, Øystein Wiig, Stanislav Belikov, Andrei N. Boltunov, Gerald W. Garner
2002, Journal of Applied Ecology (39) 79-90
1. Animal populations, defined by geographical areas within a species’ distribution where population dynamics are largely regulated by births and deaths rather than by migration from surrounding areas, may be the correct unit for wildlife management. However, in heterogeneous landscapes varying habitat quality may yield subpopulations with distinct patterns in...
Testing pop-up satellite tags as a tool for identifying critical habitat for Pacific halibut (Hippoglossus stenolepis) in the Gulf of Alaska
Andrew C. Seitz, Derek Wilson, Jennifer L. Nielsen
2002, Report
To maintain healthy commercial and sport fisheries for Pacific halibut (Hippoglossus stenolepis), critical habitat must be defined by determining life history patterns on a daily and seasonal basis. Pop-up satellite archival transmitting (PSAT) tags provide a fisheries-independent method of collecting environmental preference data (depth and ambient water temperature) as...
First record of a Greater Shearwater (Puffinus gravis) in Alaska
John M. Pearce
2002, Western Birds (33) 121-122
The Greater Shearwater (Puffinus gravis) breeds in the southern Atlantic Ocean and disperses after breeding to the North Atlantic. On 3 August 2001, I observed and photographed an unidentified shearwater (Figure 1) in the Gulf of Alaska, about 30 km off the southern coast of Montague Island (59°50' N, 148°00'...
