Geoscience Reference
In-Depth Information
Acknowledgments. Principal funding for this project was pro-
vided by the U.S. Geological Survey. We thank G. S. york and k.
S. Simac for logistical support on this project and for keeping the
office going while we were preoccupied. We thank G. M. Durner,
E. V. Regehr, M. Runge, and S. Morey for valuable discussions
and k. Oakley for effective and insightful project management.
We are grateful to W. L. Thompson, T. Starfield, N. Lunn, and B.
Taylor for helpful reviews of earlier versions of our model and this
paper. We acknowledge the modeling groups for making their sea
ice simulations and projections available for analysis, the Program
for Climate Model Diagnosis and Intercomparison (PCMDI) for
collecting and archiving the CMIP3 model output, and the WCRP's
Working Group on Coupled Modeling (WGCM) for organizing
the model data analysis activity. The WCRP CMIP3 multimodel
data set is supported by the Office of Science, U.S. Department of
Energy. Any use of trade, product, or company names in this publi-
cation is for descriptive purposes only and does not imply endorse-
ment by the U.S. Government.
Amstrup, S. C., T. l. McDonald, and G. M. Durner (2004), Us-
ing satellite radiotelemetry data to delineate and manage wildlife
populations, Wildl. Soc. Bull ., 32 (3), 661-679.
Amstrup, S. C., G. M. Durner, I. Stirling, and T. l. McDonald
(2005), Allocating harvests among polar bear stocks in the Beau-
fort Sea, Arctic , 58 (3), 247-259.
Amstrup, S. C., I. Stirling, T. S. Smith, C. Perham, and G. W. Thie-
mann (2006), Recent observations of intraspecific predation and
cannibalism among polar bears in the southern Beaufort Sea, Po-
lar Biol ., 29 (11), 997-1002, doi:10.1007/s00300-006-0142-5.
Amstrup, S. C., B. G. Marcot, and D. C. Douglas (2007), Forecast-
ing the range-wide status of polar bears at selected times in the
21st century, administrative report, 123 pp., U.S. Geol. Surv.,
Alaska Sci. Cent., Anchorage, Alaska. (Available at http://www.
usgs.gov/newsroom/special/polar_bears/)
Arthur, S. M., B. F. J. Manly, l. l. McDonald, and G. W. Garner
(1996), Assessing habitat selection when availability changes,
Ecology , 77 (1), 215-227.
Barrett, G. W. (1981), Stress ecology: An integrative approach, in
Stress Effects on Natural Ecosystems , edited by G. W. Barrett
and R. Rosenberg, pp. 3-12, John Wiley, New york.
Belchansky, G. I., D. C. Douglas, and N. G. Platonov (2005), Spa-
tial and temporal variations in the age structure of Arctic sea ice,
Geophys. Res. Lett. , 32 , l18504, doi:10.1029/2005Gl023976.
Belchansky, G. I., D. C. Douglas, and N. G. Platonov (2008), Fluc-
tuating Arctic sea ice thickness changes estimated by an in situ
learned and empirically forced neural network model, J. Clim.,
21 (4) , 716-729, doi:10.1175/2007JClI1787.1
Best, R. C. (1984), Digestibility of ringed seals by the polar bear,
Can . J. Zool ., 63 , 1033-1036.
Bluhm, B. A., and R. Gradinger (2008), Regional variability in
food availability for Arctic marine mammals , Ecol. Appl ., 18 ,
suppl., S77-S96.
Bollen, k. A. (1989), Structural Equations With Latent Variables ,
528 pp., John Wiley, New york.
Brook, R. k., and E. S. Richardson (2002), Observations of polar
bear predatory behaviour toward caribou, Arctic , 55 (2), 193-
196.
Cain, J. (2001), Planning improvements in natural resources man-
agement: Guidelines for using Bayesian networks to support the
planning and management of development programmes in the
water sector and beyond, report, 124 pp., Crowmarsh Gifford,
Cent. for Ecol. and hydrol., Wallingford, U. k.
Calvert, W., and I. Stirling (1990), Interactions between polar bears
and overwintering walruses in the central Canadian high Arctic,
Int. Conf. Bear Res. Manage ., 8 , 351-356.
Cavalieri, D., C. Parkinson, P. Gloersen, and h. J. Zwally (1996),
Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/
I passive microwave data, http://nsidc.org/data/nsidc-0051.html ,
Natl. Snow and Ice Data Cent., Boulder, Colo. (updated 2006)
Comiso, J. C. (2002), A rapidly declining perennial sea ice cover
in the Arctic, Geophys. Res. Lett. , 29 (20), 1956, doi:10.1029/
2002Gl015650.
Comiso, J. C. (2006), Abrupt decline in the Arctic winter sea
ice cover, Geophys. Res. Lett., 33, l18504, doi:10.1029/
2006Gl027341.
REFERENCES
Aalders, I . (2008), Modeling land-use decision behavior with Baye-
sian belief networks . Ecol. Soc ., 13 (1), article 16 .
Aars, J., N. J. lunn, and A. E. Derocher (2006), Polar bears: Pro-
ceedings of the fourteenth working meeting of the IUCN/SSC
Polar Bear Specialist Group , Occas. Pap. IUCN Species Surv.
Comm. 32 , 189 pp., Int. Union for Conserv. Nature and Nat. Re-
sour., Gland, Switzerland.
Ainley, D. G., C. T. Tynan, and I. Stirling (2003), Sea ice: A criti-
cal habitat for polar marine mammals and birds, in Sea Ice: An
Introduction to Its Physics, Chemistry, Biology and Geology ,
edited by D. N. Thomas and G. S. Dieckmann, pp. 240-266,
Blackwell Sci., Malden, Mass.
Amstrup, S. C. (1986), Polar bear, in Audubon Wildlife Report ,
edited by R. l. DiSilvestro, pp. 790-804, Natl. Audubon Soc.,
New york.
Amstrup, S. C. (2000), Polar bear, in The Natural History of an Oil
Field: Development and Biota , edited by J. C. Truett and S. R.
Johnson, pp. 133-157, Academic, New york.
Amstrup, S. C. (2003), Polar bear, in Wild Mammals of North
America. Biology, Management, and Conservation , 2nd ed.,
edited by G. A. Feldhammer, B. C. Thompson, and J. A. Chap-
man, pp. 587-610, Johns hopkins Univ. Press, Baltimore,
Md.
Amstrup, S. C., and D. P. DeMaster (1988), Polar bear— Ursus
maritimus , in Selected Marine Mammals of Alaska: Species Ac-
counts With Research and Management Recommendations , ed-
ited by J. W. lentfer, pp. 39-56, Mar. Mammal Comm., Wash-
ington, D. C.
Amstrup, S. C., and C. Gardner (1994), Polar bear maternity den-
ning in the Beaufort Sea, J. Wildl. Manage ., 58 (1), 1-10.
Amstrup, S. C., G. M. Durner, I. Stirling, N. J. lunn, and F. Messier
(2000), Movements and distribution of polar bears in the Beau-
fort Sea, Can. J. Zool ., 78 , 948-966.
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