Unified Interior Regions

Region 11: Alaska

Alaska Science Center

Alaska Science Center

4210 University Drive
Anchorage, AK 99508
Phone: (907) 786-7000

View Center Website

Volcano Science Center

Volcano Science Center

4230 University Drive
Anchorage, AK 99508
Phone: (907) 786-7497

View Center Website

Climate Adaptation Science Center

Climate Adaptation Science Center

4230 University Drive
Anchorage, AK 99508
Phone: 907-301-7830

View Center Website

Regions L2 Landing Page Tabs

Filter Total Items: 2,376
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Year Published: 2012

Microanatomy of passerine hard-cornified tissues: Beak and claw structure of the black-capped chickadee (Poecile atricapillus)

The microanatomy of healthy beaks and claws in passerine birds has not been well described in the literature, despite the importance of these structures in avian life. Histological processing of hard‐cornified tissues is notoriously challenging and only a few reports on effective techniques have been published. An emerging epizootic of beak...

Van Hemert, Caroline R.; Handel, Colleen M.; Blake, John E.; Swor, Rhonda; O'Hara, Todd M.
Van Hemert, C. R., C. M. Handel, J. E. Blake, R. M. Swor, and T. M. O'Hara. 2012. Microanatomy of Passerine hard-cornified tissues: beak and claw structure of the Black-capped Chickadee (Poecile atricapillus). Journal of Morphology 273(2):226-240. doi:10.1002/jmor.11023

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Year Published: 2012

Changing Arctic ecosystems--research to understand and project changes in marine and terrestrial ecosystems of the Arctic

Ecosystems and their wildlife communities are not static; they change and evolve over time due to numerous intrinsic and extrinsic factors. A period of rapid change is occurring in the Arctic for which our current understanding of potential ecosystem and wildlife responses is limited. Changes to the physical environment include warming...

Geiselman, Joy; DeGange, Anthony R.; Oakley, Karen; Derksen, Dirk V.; Whalen, Mary E.
Changing Arctic ecosystems--research to understand and project changes in marine and terrestrial ecosystems of the Arctic; 2012; FS; 2011-3136; Geiselman, Joy; DeGange, Tony; Oakley, Karen; Derksen, Dirk; Whalen, Mary

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Year Published: 2012

Cross-species amplification of microsatellite markers in the Great Horned Owl Bubo virginianus, Short-eared Owl Asio flammeus and Snowy Owl B. scandiacus for use in population genetics, individual identification and parentage studies

Using DNA from blood and feathers, we screened twenty-four microsatellite primer pairs initially developed for six strigid owls, and four primer pairs shown to be polymorphic across avian taxa, for their utility in Great Horned Owl (Bubo virginianus), Short-eared Owl (Asio flammeus), and Snowy Owl (Bubo scandiacus). Eight of these primers reliably...

Dial, Cody R.; Talbot, Sandra L.; Sage, George K.; Seidensticker, Mathew T.; Holt, Denver W.
Dial, C. R., S. L. Talbot, G. K. Sage, M. Seidensticker, and D. W. Holt. 2012. Cross-species amplification of microsatellite markers in the Great Horned Owl Bubo virginianus, Short-eared Owl Asio flammeus and Snowy Owl B. scandiacus for use in population genetics, individual identification and parentage studies. Yamashina Institute for Ornithology 44:1-12.

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Year Published: 2012

Long-term effects of the 'Exxon Valdez' oil spill: Sea otter foraging in the intertidal as a pathway of exposure to lingering oil

The protracted recovery of some bird and mammal populations in western Prince William Sound (WPWS), Alaska, and the persistence of spilled 'Exxon Valdez' oil in intertidal sediments, suggests a pathway of exposure to consumers that occupy nearshore habitats. To evaluate the hypothesis that sea otter (Enhydra lutris) foraging allows access to...

Bodkin, James L.; Ballachey, Brenda E.; Coletti, Heather A.; Esslinger, George G.; Kloecker, Kimberly A.; Rice, Stanley D.; Reed, John A.; Monson, Daniel H.
Bodkin, J. L., B. E. Ballachey, H. A. Coletti, G. G. Esslinger, K. A. Kloecker, S. D. Rice, J. A. Reed, and D. H. Monson. 2012. Long-term effects of the Exxon Valdez oil spill: Sea otter foraging in the intertidal as a pathway of exposure to lingering oil. Marine Ecology Progress Series 447:273-287. doi:10.3354/meps09523

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Year Published: 2012

A circumpolar monitoring framework for polar bears

Polar bears (Ursus maritimus) occupy remote regions that are characterized by harsh weather and limited access. Polar bear populations can only persist where temporal and spatial availability of sea ice provides adequate access to their marine mammal prey. Observed declines in sea ice availability will continue as long as greenhouse gas...

Vongraven, Dag; Aars, Jon; Amstrup, Steven C.; Atkinson, Stephen N.; Belikov, Stanislav; Born, Erik W.; DeBruyn, T.D.; Derocher, Andrew E.; Durner, George M.; Gill, Michael J.; Lunn, Nicholas J.; Obbard, Martyn E.; Omelak, Jack; Ovsyanikov, Nikita; Peacock, Elizabeth L.; Richardson, E.E.; Sahanatien, Vicki; Stirling, Ian; Wiig, Øystein
Vongraven, D., J. Aars, S. C. Amstrup, S. N. Atkinson, S. E. Belikov, E. W. Born, T. D. DeBruyn, A. E. Derocher, G. M. Durner, N. J. Lunn, M. E. Obbard, J. Omelak, N. Ovsyanikov, E. Peacock, E. S. Richardson, V. Sahanatien, I. Stirling, and Ø. Wiig. 2012. A circumpolar monitoring framework for polar bears. Ursus 23(sp2):1-66. doi:10.2192/URSUS-D-11-00026.1

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Year Published: 2012

Predation rates, timing, and predator composition for Scoters (Melanitta spp.) in marine habitats

Studies of declining populations of sea ducks have focused mainly on bottom-up processes with little emphasis on the role of predation. We identified 11 potential predators of White-winged Scoters (Melanitta fusca (L., 1758)) and Surf Scoters (Melanitta perspicillata (L., 1758)) in North American marine habitats. However, of 596 Scoters marked...

Anderson, Eric J.; Esler, Daniel N.; Sean, Boyd W.; Evenson, Joseph; Nysewander, David R.; Ward, David H.; Dickson, Rian D.; Uher-Koch, Brian D.; Vanstratt, C.S.; Hupp, Jerry W.
Anderson, E. M., D. Esler, W. S. Boyd, J. R. Evenson, D. R. Nysewander, D. H. Ward, R. D. Dickson, B. D. Uher-Koch, C. S. VanStratt, and J. W. Hupp. 2012. Predation rates, timing, and predator composition for scoters (Melanitta spp.) in marine habitats. Canadian Journal of Zoology 90(1):42-50. doi:10.1139/z11-110

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Year Published: 2012

Range overlap and individual movements during breeding season influence genetic relationships of caribou herds in south-central Alaska

North American caribou (Rangifer tarandus) herds commonly exhibit little nuclear genetic differentiation among adjacent herds, although available evidence supports strong demographic separation, even for herds with seasonal range overlap. During 1997–2003, we studied the Mentasta and Nelchina caribou herds in south-central Alaska using...

Roffler, Gretchen H.; Adams, Layne G.; Talbot, Sandra L.; Sage, George K.; Dale, Bruce W.
Range overlap and individual movements during breeding season influence genetic relationships of caribou herds in south-central Alaska; 2012; Article; Journal; Canadian Journal of Zoology; Roffler, Gretchen H.; Adams, Layne G.; Talbot, Sandra L.; Sage, George K.; Dale, Bruce W.

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Year Published: 2012

Diversity of nitrogen isotopes and protein status in caribou: implications for monitoring northern ungulates

Nutritional condition is an important determinant of productivity and survival in caribou (Rangifer tarandus). We used samples of excreta (n  =  1,150) to estimate diet composition from microhistology and 2 isotopic proxies of protein status for 2 ecotypes of caribou in 4 herds in late winter (2006–2008). Isotopes of nitrogen (δ15N in parts per...

Gustine, David D.; Barboza, Perry S.; Lawler, James P.; Adams, Layne G.; Parker, Kathy L.; Arthur, Steve M.; Shults, Brad S.
Diversity of nitrogen isotopes and protein status in caribou: implications for monitoring northern ungulates; 2012; Article; Journal; Journal of Mammalogy; Gustine, David D.; Barboza, Perry S.; Lawler, James P.; Adams, Layne G.; Parker, Kathy L.; Arthur, Steve M.; Shults, Brad S.

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Year Published: 2012

Small population size of Pribilof Rock Sandpipers confirmed through distance-sampling surveys in Alaska

The Rock Sandpiper (Calidris ptilocnemis) is endemic to the Bering Sea region and unique among shorebirds in the North Pacific for wintering at high latitudes. The nominate subspecies, the Pribilof Rock Sandpiper (C. p. ptilocnemis), breeds on four isolated islands in the Bering Sea and appears to spend the winter primarily in Cook Inlet, Alaska....

Ruthrauff, Daniel R.; Tibbitts, T. Lee; Gill, Robert E.; Dementyev, Maksim N.; Handel, Colleen M.
Ruthrauff, D. R., T. L. Tibbitts, R. E. Gill, Jr., M. N. Dementyev, and C. M. Handel. 2012. Small population size of Pribilof Rock Sandpipers confirmed through distance-sampling surveys in Alaska. Condor 114(3):544-551. DOI: 10.1525/cond.2012.110109

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Year Published: 2012

Assessment of pingo distribution and morphometry using an IfSAR derived digital surface model, western Arctic Coastal Plain, Northern Alaska

Pingos are circular to elongate ice-cored mounds that form by injection and freezing of pressurized water in near-surface permafrost. Here we use a digital surface model (DSM) derived from an airborne Interferometric Synthetic Aperture Radar (IfSAR) system to assess the distribution and morphometry of pingos within a 40,000 km2 area on...

Jones, Benjamin M.; Grosse, G.; Hinkel, Kenneth M.; Arp, C.D.; Walker, S.; Beck, R.A.; Galloway, J.P.
Assessment of pingo distribution and morphometry using an IfSAR derived digital surface model, western Arctic Coastal Plain, Northern Alaska; 2012; Article; Journal; Geomorphology; Jones, B. M.; Grosse, G.; Hinkel, K. M.; Arp, C. D.; Walker, S.; Beck, R. A.; Galloway, J. P.

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Year Published: 2012

Contrasting extreme long-distance migration patterns in bar-tailed godwits Limosa lapponica

Migrating birds make the longest non-stop endurance flights in the animal kingdom. Satellite technology is now providing direct evidence on the lengths and durations of these flights and associated staging episodes for individual birds. Using this technology, we compared the migration performance of two subspecies of bar-tailed godwit Limosa...

Battley, Phil F.; Warnock, Nils; Tibbitts, T. Lee; Gill, Robert E.; Piersma, Theunis; Hassell, Chris J.; Douglas, David C.; Mulcahy, Daniel M.; Gartrell, Brett D.; Schuckard, Rob; Melville, David S.; Riegen, Adrian C.
Battley, P. F., N. Warnock, T. L. Tibbitts, R. E. Gill, Jr., T. Piersma, C. J. Hassell, D. C. Douglas, D. M. Mulcahy, B. D. Gartrell, R. Schuckard, D. S. Melville, and A. C. Riegen. 2012. Contrasting extreme long-distance migration patterns in Bar-tailed Godwits Limosa lapponica. Journal of Avian Biology 43(1):21-32. doi:10.1111/j.1600-048X.2011.05473.x

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Year Published: 2012

Genetic and morphological divergence among Cooper's Hawk (Accipiter cooperii) populations breeding in north-central and western North America

Cooper's Hawk (Accipiter cooperii) populations breeding in the northern portion of the species' range exhibit variation in morphological traits that conforms to predictions based on differences in prey size, tree stand density, and migratory behavior. We examined genetic structure and gene flow and compared divergence at morphological traits (PST...

Sonsthagen, Sarah A.; Rosenfield, Robert N.; Bielefeldt, John; Murphy, Robert K.; Stewart, Andrew C.; Stout, William C.; Driscoll, Timothy G.; Bozek, Michael A.; Sloss, Brian L.; Talbot, Sandra L.
Sonsthagen, S. A., R. N. Rosenfield, J. Bielefeldt, R. K. Murphy, A. C. Stewart, W. E. Stout, T. G. Driscoll, M. A. Bozek, B. L. Sloss, and S. L. Talbot. 2012. Genetic and morphological divergence among Cooper's Hawk (Accipiter cooperii) populations breeding in north-central and western North America. The Auk 129(3):427-437. doi:10.1525/auk.2012.11166

Browse a selection of videos, audio clips, images, and more from a wide range of science topics covered by USGS!

"Science for a Changing World" - watch the short film here!

Documentary on walruses here!

Watch the first-ever footage of a polar bear on Arctic sea ice!

Join USGS geologists as they collect lava samples from Kilauea Volcano.

Watch researchers in the Arctic!

Filter Total Items: 989
Whiskered Auklet in the Aleutian Islands
June 10, 2005

Whiskered Auklet in the Aleutian Islands

Whiskered Auklet in the Aleutian Islands

Tanana River sonar at Nenana
June 2, 2005

Tanana River sonar at Nenana

Tanana River sonar at Nenana

Image: Alaskan Glacier
June 1, 2005

Alaskan Glacier

Near Seward, Alaska

Attribution: Region 11: Alaska
Yukon River near Eagle, Alaska
May 23, 2005

Yukon River near Eagle, Alaska

Yukon River and rainbow near Eagle, Alaska

Sheridan River sonar
April 8, 2005

Sheridan River sonar

Sheridan River sonar

George Durner collecting data on an anesthetized polar bear
April 1, 2005

George Durner collecting data on an anesthetized polar bear

George Durner collecting data on an anesthetized polar bear

Sheridan River scour hole
January 26, 2005

Sheridan River scour hole

Sheridan River scour hole

Muir and Riggs glaciers flowing into a lake in Alaska
December 31, 2004

Muir and Riggs Glaciers, Muir Inlet, Alaska

Glaciers

As this picture of Muir and Riggs Glaceris in Alaska shows, glaciers are really rivers, but rivers of solid ice instead of liquid water. Just because they are solid does not mean they don't move, though. Glaciers do flow downhill, just very, very slowly.

Glaciers begin life as snowflakes. When the snowfall in an area far exceeds the

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Attribution: Region 11: Alaska
October 30, 2004

PubTalk 10/2004 — Hot Oil, Frozen Ground, and Earthquakes

The Trans-Alaska Pipeline story-- so far, so good!

by George Gryc, Arthur Lachenbruch, and Robert Page, Scientists Emeriti

  • The 1968 discovery of North America.s largest oil fi eld on the Arctic coast posed the challenge of an 800-mile pipeline to carry hot oil across mountains, rivers, and the giant Denali Fault
  • The oil
Attribution: Region 11: Alaska
Black Scoter in Dutch Harbor, Alaska
September 1, 2004

Black Scoter in Dutch Harbor, Alaska

Black Scoter: Dutch Harbor, Alaska

Steller's Eider in Dutch Harbor, Alaska
September 1, 2004

Steller's Eider in Dutch Harbor, Alaska

Steller's Eider in Dutch Harbor, Alaska

Image: Muir and Riggs Glaciers, Muir Inlet, Alaska - 2004
August 31, 2004

Muir and Riggs Glaciers, Muir Inlet, Alaska - 2004

The second repeat photograph documents significant changes that have occurred during the 63 years between photographs A and C, and during the 54 years between photographs B and C. Muir Glacier has retreated out of the field of view and is now more than 7 kilometers northwest. Riggs Glacier has retreated as much as 600 meters and thinned more than 250 meters. Note the dense

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Attribution: Region 11: Alaska

Stay up-to-date with what is happening in the Alaska Region by checking out our different social media accounts. You can also contact Alaska Regional Office staff or Center Directors for more information.