George J. Divoky
College of the Atlantic
Publications 19
Published on Mar 5, 2018in Philosophical Transactions of the Royal Society B6.14
Gianna M. Tricola1
Estimated H-index: 1
(Bucknell University),
Mirre J. P. Simons13
Estimated H-index: 13
(University of Sheffield)
+ 23 AuthorsAlexander S. Kitaysky33
Estimated H-index: 33
(UAF: University of Alaska Fairbanks)
Telomeres are highly conserved regions of DNA that protect the ends of linear chromosomes. The loss of telomeres can signal an irreversible change to a cell9s state, including cellular senescence. Senescent cells no longer divide and can damage nearby healthy cells, thus potentially placing them at the crossroads of cancer and ageing. While the epidemiology, cellular and molecular biology of telomeres are well studied, a newer field exploring telomere biology in the context of ecology and evolut...
Published on Dec 1, 2017in Bulletin of the American Meteorological Society8.17
Christopher J. Cox10
Estimated H-index: 10
(CIRES: Cooperative Institute for Research in Environmental Sciences),
Robert S. Stone27
Estimated H-index: 27
(ESRL: Earth System Research Laboratory)
+ 6 AuthorsDavid Longenecker4
Estimated H-index: 4
(CIRES: Cooperative Institute for Research in Environmental Sciences)
AbstractLinkages between atmospheric, ecological, and biogeochemical variables in the changing Arctic are analyzed using long-term measurements near Utqiaġvik (formerly Barrow), Alaska. Two key variables are the date when snow disappears in spring, as determined primarily by atmospheric dynamics, precipitation, air temperature, winter snow accumulation, and cloud cover, and the date of onset of snowpack in autumn that is additionally influenced by ocean temperature and sea ice extent. In 2015 an...
Published on Sep 1, 2016in Biology Letters3.32
George J. Divoky12
Estimated H-index: 12
David C. Douglas37
Estimated H-index: 37
(USGS: United States Geological Survey),
I. J. Stenhouse1
Estimated H-index: 1
Mandt's black guillemot (Cepphus grylle mandtii) is one of the few seabirds associated in all seasons with Arctic sea ice, a habitat that is changing rapidly. Recent decreases in summer ice have reduced breeding success and colony size of this species in Arctic Alaska. Little is known about the species' movements and distribution during the nine month non-breeding period (September–May), when changes in sea ice extent and composition are also occurring and predicted to continue. To examine bird ...
Published on Aug 1, 2015in Progress in Oceanography3.25
George J. Divoky12
Estimated H-index: 12
Paul M. Lukacs18
Estimated H-index: 18
(UM: University of Montana),
Matthew L. Druckenmiller3
Estimated H-index: 3
Recent major reductions in summer arctic sea ice extent could be expected to be affecting the distributions and life histories of arctic marine biota adapted to living adjacent to sea ice. Of major concern are the effects of ice reductions, and associated increasing SST, on the most abundant forage fish in the Arctic, Arctic cod (Boreogadus saida), the primary prey for the region’s upper trophic level marine predators. The black guillemot (Cepphus grylle mandtii) is an ice-obligate diving seabir...
Published on Aug 1, 2015in Progress in Oceanography3.25
Lois A. Harwood12
Estimated H-index: 12
(Fisheries and Oceans Canada),
T.G. Smith1
Estimated H-index: 1
+ 3 AuthorsGeorge J. Divoky12
Estimated H-index: 12
Studies of the body condition of five marine vertebrate predators in the Beaufort Sea, conducted independently during the past 2–4 decades, suggest each has been affected by biophysical changes in the marine ecosystem. We summarize a temporal trend of increasing body condition in two species (bowhead whale subadults, Arctic char), in both cases influenced by the extent and persistence of annual sea ice. Three other species (ringed seal, beluga, black guillemot chicks), consumers with a dietary p...
Published on Jun 5, 2013in Arctic1.43
B. Britten Harter2
Estimated H-index: 2
Kyle H. Elliott24
Estimated H-index: 24
+ 1 AuthorsGail K. Davoren23
Estimated H-index: 23
Although Arctic cod ( Boreogadus saida ) is widely recognized as an important trophic link to top predators in Arctic marine ecosystems, the challenges of conducting fieldwork in the Arctic make this species difficult to study. We establish some basic relationships to improve prey energetics modeling when only in-field parameters (e.g., fork length) can be measured. We investigated the intraspecific relationships among energy density, fork length, mass, and water content for Arctic cod captured ...
Published on Aug 1, 2008in Oecologia2.92
Suzanne M. Budge23
Estimated H-index: 23
(Dal: Dalhousie University),
Matthew J. Wooller29
Estimated H-index: 29
(UAF: University of Alaska Fairbanks)
+ 3 AuthorsG. J. Divoky1
Estimated H-index: 1
(UAF: University of Alaska Fairbanks)
Global warming and the loss of sea ice threaten to alter patterns of productivity in arctic marine ecosystems because of a likely decline in primary productivity by sea ice algae. Estimates of the contribution of ice algae to total primary production range widely, from just 3 to >50%, and the importance of ice algae to higher trophic levels remains unknown. To help answer this question, we investigated a novel approach to food web studies by combining the two established methods of stable isotop...
Published on Jun 1, 2008in Annals of the New York Academy of Sciences4.29
Mark A. Moline32
Estimated H-index: 32
(California Polytechnic State University),
Nina J. Karnovsky22
Estimated H-index: 22
(Pomona College)
+ 5 AuthorsWilliam R. Fraser2
Estimated H-index: 2
Polar regions have experienced significant warming in recent decades. Warming has been most pronounced across the Arctic Ocean Basin and along the Antarctic Peninsula, with significant decreases in the extent and seasonal duration of sea ice. Rapid retreat of glaciers and disintegration of ice sheets have also been documented. The rate of warming is increasing and is predicted to continue well into the current century, with continued impacts on ice dynamics. Climate-mediated changes in ice dynam...