Site-specific effects on productivity of an upper trophic-level marine predator: Bottom-up, top-down, and mismatch effects on reproduction in a colonial seabird
R.M. Suryan, D.B. Irons, E.D. Brown, P.G.R. Jodice, D.D. Roby
2006, Progress in Oceanography (68) 303-328
We investigated the relative roles of bottom-up and top-down factors in limiting productivity of an upper trophic level marine predator. Our primary working hypothesis was that the reproductive success of black-legged kittiwakes (Rissa tridactyla) a piscivorous, colonial-nesting seabird, was most limited by the abundance, distribution, and species composition of surface-schooling...
Quiescent deformation of the Aniakchak Caldera, Alaska mapped by InSAR
Oh-Ig Kwoun, Zhong Lu, Christina A. Neal, Charles W. Wicks Jr.
2006, Geology (34) 5-8
The 10-km-wide caldera of the historically active Aniakchak volcano, Alaska, subsides ∼13 mm/yr, based on data from 19 European Remote Sensing Satellite (ERS-1 and ERS-2) interferometric synthetic aperture radar (InSAR) images from 1992 through 2002. The pattern of subsidence does not reflect the distribution of pyroclastic deposits from the last...
Scaling uncertainties in estimating canopy foliar maintenance respiration for black spruce ecosystems in Alaska
X. Zhang, A. D. McGuire, Roger W. Ruess
2006, Mitigation and Adaptation Strategies for Global Change (11) 147-174
A major challenge confronting the scientific community is to understand both patterns of and controls over spatial and temporal variability of carbon exchange between boreal forest ecosystems and the atmosphere. An understanding of the sources of variability of carbon processes at fine scales and how these contribute to uncertainties in...
Predictable hotspots and foraging habitat of the endangered short-tailed albatross (Phoebastria albatrus) in the North Pacific: Implications for conservation
John F. Piatt, J. Wetzel, K. Bell, A.R. DeGange, G.R. Balogh, G.S. Drew, T. Geernaert, C. Ladd, G.V. Byrd
2006, Deep-Sea Research Part II: Topical Studies in Oceanography (53) 387-398
The short-tailed albatross (Phoebastria albatrus) is a rare and endangered seabird that ranges widely over the northern North Pacific. Populations are slowly recovering but birds face several threats at sea, in particular the incidental capture of birds in long-line fisheries. Conservation efforts are hampered by a lack of information about...
Comparison of remotely deployed satellite radio transmitters on walruses
C.V. Jay, M. P. Heide-Jorgensen, Anthony S. Fischbach, M.V. Jensen, D.F. Tessler, A.V. Jensen
2006, Marine Mammal Science (22) 226-236
No abstract available....
Effects of El Niño on distribution and reproductive performance of Black Brant
James S. Sedinger, David H. Ward, Jason L. Schamber, William I. Butler, William D. Eldridge, Bruce Conant, James F. Voelzer, Nathan Chelgren, Mark P. Herzog
2006, Ecology (87) 151-159
Climate in low-latitude wintering areas may influence temperate and high-latitude breeding populations of birds, but demonstrations of such relationships have been rare because of difficulties in linking wintering with breeding populations. We used long-term aerial surveys in Mexican wintering areas and breeding areas in Alaska, USA, to assess numbers of...
North Slope, Alaska: Source rock distribution, richness, thermal maturity, and petroleum charge
K. E. Peters, L. B. Magoon, K. J. Bird, Z. C. Valin, M.A. Keller
2006, American Association of Petroleum Geologists Bulletin (90) 261-292
Four key marine petroleum source rock units were identified, characterized, and mapped in the subsurface to better understand the origin and distribution of petroleum on the North Slope of Alaska. These marine source rocks, from oldest to youngest, include four intervals: (1) Middle-Upper Triassic Shublik Formation, (2) basal condensed section...
Deformation driven by subduction and microplate collision: Geodynamics of Cook Inlet basin, Alaska
R.L. Bruhn, Peter J. Haeussler
2006, Geological Society of America Bulletin (118) 289-303
Late Neogene and younger deformation in Cook Inlet basin is caused by dextral transpression in the plate margin of south-central Alaska. Collision and subduction of the Yakutat microplate at the northeastern end of the Aleutian subduction zone is driving the accretionary complex of the Chugach and Kenai Mountains toward the...
Microsatellite DNA and mitochondrial DNA variation in polar bears (Ursus maritimus) from the Beaufort and Chukchi seas, Alaska
M. A. Cronin, Steven C. Amstrup, K.T. Scribner
2006, Canadian Journal of Zoology (84) 655-660
Radiotelemetry data have shown that polar bears (Ursus maritimus Phipps, 1774) occur in separate subpopulations in the Chukchi Sea and the southern Beaufort Sea. However, segregation is not absolute, and there is overlap of ranges of animals in each subpopulation. We used genetic variation at eight microsatellite DNA loci and...
Polar bear maternal den habitat in the Arctic National Wildlife Refuge, Alaska
George M. Durner, Steven C. Amstrup, Ken J. Ambrosius
2006, Arctic (59) 31-36
Polar bears (Ursus maritimus) give birth during mid-winter in dens of ice and snow. Denning polar bears subjected to human disturbances may abandon dens before their altricial young can survive the rigors of the Arctic winter. Because the Arctic coastal plain of Alaska is an area of high petroleum potential...
Stand and landscape level effects of a major outbreak of spruce beetles on forest vegetation in the Copper River Basin, Alaska
J. L. Allen, S. Wesser, C. J. Markon, K.C. Winterberger
2006, Forest Ecology and Management (227) 257-266
From 1989 to 2003, a widespread outbreak of spruce beetles (Dendroctonus rufipennis) in the Copper River Basin, Alaska, infested over 275,000 ha of forests in the region. During 1997 and 1998, we measured forest vegetation structure and composition on one hundred and thirty-six 20-m ?? 20-m plots to assess both...
Long-period effects of the Denali earthquake on water bodies in the Puget Lowland: Observations and modeling
A. Barberopoulou, A. Qamar, T. L. Pratt, W. P. Steele
2006, Bulletin of the Seismological Society of America (96) 519-535
Analysis of strong-motion instrument recordings in Seattle, Washington, resulting from the 2002 Mw 7.9 Denali, Alaska, earthquake reveals that amplification in the 0.2-to 1.0-Hz frequency band is largely governed by the shallow sediments both inside and outside the sedimentary basins beneath the Puget Lowland. Sites above the deep sedimentary strata...
Piggyback tectonics: Long-term growth of Kilauea on the south flank of Mauna Loa
Peter W. Lipman, Thomas W. Sisson, Michelle L. Coombs, Andrew T. Calvert, Jun-Ichi Kimura
2006, Journal of Volcanology and Geothermal Research (151) 73-108
Compositional and age data from offshore pillow lavas and volcaniclastic sediments, along with on-land geologic, seismic, and deformation data, provide broad perspectives on the early growth of Kilauea Volcano and the long-term geometric evolution of its rift zones. Sulfur-rich glass rinds on pillow lavas and volcaniclastic sediments derived from...
North Kona slump: Submarine flank failure during the early(?) tholeiitic shield stage of Hualalai Volcano
P. W. Lipman, M.L. Coombs
2006, Journal of Volcanology and Geothermal Research (151) 189-216
The North Kona slump is an elliptical region, about 20 by 60 km (1000-km2 area), of multiple, geometrically intricate benches and scarps, mostly at water depths of 2000–4500 m, on the west flank of Hualalai Volcano. Two dives up steep scarps in the slump area were made in September 2001,...
Demography, genetics, and the value of mixed messages
John M. Pearce, Sandra L. Talbot
2006, Condor (108) 474-479
Iverson et al. (2004) used estimates of the homing rate for molting adult Harlequin Ducks (Histrionicus histrionicus) in Alaska to draw inferences about population structure. Homing rates, defined as one minus the ratio of birds recaptured elsewhere to those recaptured at the original banding site, were high (0.95–1.00) for males...
Predator functional response and prey survival: Direct and indirect interactions affecting a marked prey population
David A. Miller, J.B. Grand, T.F. Fondell, M. Anthony
2006, Journal of Animal Ecology (75) 101-110
1. Predation plays an integral role in many community interactions, with the number of predators and the rate at which they consume prey (i.e. their functional response) determining interaction strengths. Owing to the difficulty of directly observing predation events, attempts to determine the functional response of predators in natural systems...
Genetic structure of eelgrass Zostera marina meadows in an embayment with restricted water flow
Raquel Muniz-Salazar, Sandra L. Talbot, George K. Sage, David H. Ward, Alejandro Cabello-Pasini
2006, Marine Ecology Progress Series (309) 107-116
Genetic structure of the seagrass Zostera marina in a coastal lagoon with restricted water flow, and with heterogeneous water residence times and oceanographic characteristics, was assessed using 8 polymorphic microsatellite loci. Analyses of genetic differentiation (θ) and Bayesian clustering suggested that the Z. marina population in San Quintin Bay (SQB)...
Thickness distribution of a cooling pyroclastic flow deposit on Augustine Volcano, Alaska: Optimization using InSAR, FEMs, and an adaptive mesh algorithm
Timothy Masterlark, Zhong Lu, Russell P. Rykhus
2006, Journal of Volcanology and Geothermal Research (150) 186-201
Interferometric synthetic aperture radar (InSAR) imagery documents the consistent subsidence, during the interval 1992–1999, of a pyroclastic flow deposit (PFD) emplaced during the 1986 eruption of Augustine Volcano, Alaska. We construct finite element models (FEMs) that simulate thermoelastic contraction of the PFD to account for the observed subsidence. Three-dimensional problem...
Traversing a boreal forest landscape: Summer movements of Tule Greater White-fronted Geese
Craig R. Ely, K.S. Bollinger, Jerry W. Hupp, D.V. Derksen, J. Terenzi, John Y. Takekawa, D.L. Orthmeyer, T.C. Rothe, M.J. Petrula, D.R. Yparraguirre
2006, Waterbirds (29) 43-55
We monitored the movement, distribution and site affinities of radio-marked Tule Greater White-fronted Geese (Anser albifrons elgasi) during spring and summer in Alaska, 1994-1997 and 2004. Our assessment of summer movements was comprehensive, as locations were obtained during prenesting, nesting, and molt for over 90% of geese with active radios...
Interferometric synthetic aperture radar: Building tomorrow's tools today
Zhong Lu
2006, Alaska Satellite Facility News and Notes (15) 12-14
A synthetic aperture radar (SAR) system transmits electromagnetic (EM) waves at a wavelength that can range from a few millimeters to tens of centimeters. The radar wave propagates through the atmosphere and interacts with the Earth’s surface. Part of the energy is reflected back to the SAR system and recorded....
Genetic and demographic criteria for defining population units for conservation: The value of clear messages
Daniel Esler, S. A. Iverson, D.J. Rizzolo
2006, Condor (108) 480-483
In a recent paper on Harlequin Duck (Histrionicus histrionicus) interannual site fidelity (Iverson et al. 2004), we concluded that wintering populations were demographically structured at a finer geographic scale than that at which genetic differentiation was observed and that conservation efforts should recognize this degree of demographic independence. In a...
Far-field effects of early Tertiary ridge subduction in Alaska
D. C. Bradley, R.M. Friedman, P.W. Layer, Peter J. Haeussler, A.B. Till, S. M. Roeske, Marti L. Miller
2006, Conference Paper, Geological Society of America Abstracts with Programs Specialty Meeting No 2:91
No abstract available. ...
Post-Eocene igneous and tectonic effects of spreading center subduction under southeast Alaska: Far-field effects of early Tertiary ridge subduction in Alaska
2006, Conference Paper, Proceedings of Conference on BackBone of the Americas - Patagonia to Alaska
No abstract available. ...
The transition from explosive to effusive eruptive regime: The example of the 1912 Novarupta eruption, Alaska
N.K. Adams, Bruce F. Houghton, S.A. Fagents, W. Hildreth
2006, Geological Society of America Bulletin (118) 620-634
The shift from explosive to effusive silicic volcanism seen in many historical eruptions reflects a change in the style of degassing of erupted magma. This paper focuses on such a transition during the largest eruption of the twentieth century, the 1912 eruption of Novarupta. The transition is recorded in a...
Effects of abdominally implanted radiotransmitters with percutaneous antennas on migration, reproduction, and survival of Canada geese
Jerry W. Hupp, John M. Pearce, Daniel M. Mulcahy, David A. Miller
2006, Journal of Wildlife Management (70) 812-822
Abdominally implanted radiotransmitters with percutaneous antennas are increasingly used to monitor movements, survival, and reproduction of waterbirds. However, there has been relatively little assessment of the effects of such radios on avian demographic parameters or migration. We implanted either a 26- or 35-g abdominal transmitter with percutaneous antenna in 198...
