George J. Divoky
University of Alaska Fairbanks
Publications 24
#1Gianna M. Tricola (Bucknell University)H-Index: 1
#2Mirre J. P. Simons (University of Sheffield)H-Index: 14
Last.Mark F. Haussmann (Bucknell University)H-Index: 27
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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...
23 CitationsSource
#1Christopher J. Cox (CIRES: Cooperative Institute for Research in Environmental Sciences)H-Index: 12
#2Robert S. Stone (ESRL: Earth System Research Laboratory)H-Index: 28
Last.David Longenecker (CIRES: Cooperative Institute for Research in Environmental Sciences)H-Index: 5
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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...
17 CitationsSource
#1Christopher J. CoxH-Index: 12
#2Diane M. StanitskiH-Index: 4
Last.George J. DivokyH-Index: 14
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#1George J. DivokyH-Index: 14
#2David C. Douglas (USGS: United States Geological Survey)H-Index: 38
Last.I. J. StenhouseH-Index: 1
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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 bir...
11 CitationsSource
#1George J. DivokyH-Index: 14
#2David C. DouglasH-Index: 38
Last.I. J. StenhouseH-Index: 1
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#1George J. DivokyH-Index: 14
#2Paul M. Lukacs (UM: University of Montana)H-Index: 20
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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...
31 CitationsSource
#1Lois A. Harwood (Fisheries and Oceans Canada)H-Index: 13
#2T.G. SmithH-Index: 1
Last.George J. DivokyH-Index: 14
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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...
39 CitationsSource
#1B. Britten HarterH-Index: 2
#2Kyle H. ElliottH-Index: 25
Last.Gail K. DavorenH-Index: 24
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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 ...
20 CitationsSource
2 Citations
#1Suzanne M. Budge (Dal: Dalhousie University)H-Index: 24
#2Matthew J. Wooller (UAF: University of Alaska Fairbanks)H-Index: 31
Last.George J. Divoky (UAF: University of Alaska Fairbanks)H-Index: 14
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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...
130 CitationsSource