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Marlin C, D. E., Griselin M, Quenet M, Tolle F, Bernard E, Saintenoy A, Friedt J. (2012). Hydrogeochemical approach to understanding the glacier-permafrost subglacial-system interactions in a glaciated catchment of Western Spitsbergen.
. Bachelor's thesis, , .
Abstract: 10th International Conference on Permafrost, which will take place on June 25-29, 2012 in Russia, in Salekhard, Yamal-nenets Autonomous District, Russia. Article de 4 pages
Programme: 304
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Roux N., G. C., Delangle E. Marlin Ch., Griselin M., Saintenoy A., Friedt J. (2012). Thermo-Hydro-Mechanical modeling of a glacier-permafrost system in Spitsbergen – implications on the subglacial water transfer times
. Bachelor's thesis, , .
Abstract: 10th International Conference on Permafrost, which will take place on June 25-29, 2012 in Russia, in Salekhard, Yamal-nenets Autonomous District, Russia. Article de 4 pages
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Programme: 304
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Gilg Olivier, K. K. M., Aars Jon, Fort Jérôme, Gauthier Gilles, Grémillet David, Ims Rolf A, Meltofte Hans, Moreau Jérôme, Post Eric, Schmidt Niels Martin, Yannic Glenn, Bollache Loïc,. (2012). Climate change and the ecology and evolution of Arctic vertebrates
. 0077-8923, , no-no.
Abstract: Climate change is taking place more rapidly and severely in the Arctic than anywhere on the globe, exposing Arctic vertebrates to a host of impacts. Changes in the cryosphere dominate the physical changes that already affect these animals, but increasing air temperatures, changes in precipitation, and ocean acidification will also affect Arctic ecosystems in the future. Adaptation via natural selection is problematic in such a rapidly changing environment. Adjustment via phenotypic plasticity is therefore likely to dominate Arctic vertebrate responses in the short term, and many such adjustments have already been documented. Changes in phenology and range will occur for most species but will only partly mitigate climate change impacts, which are particularly difficult to forecast due to the many interactions within and between trophic levels. Even though Arctic species richness is increasing via immigration from the South, many Arctic vertebrates are expected to become increasingly threatened during this century.
Keywords: impacts, phenological changes, plasticity, range shifts, adaptations, threat, trophic interactions, mismatches, sea ice, tundra, parasites, geese, shorebirds, rodents, lemmings, large herbivores, seabirds, marine mammals, polar bear,
Programme: 1036
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Massé G., B. S., Crosta, X., Schmidt S., Snape, I., Thomas, D.N., Rowland S.J. (2011). Highly branched isoprenoids as proxies for variable sea ice conditions in the Southern Ocean. Antarct. Sci., .
Abstract: Concentrations of a highly branched isoprenoid (HBI) diene determined in over 200 sediment samples from the Arctic co-vary with those of an HBI monoene (IP25) shown previously to be a sedimentary sea ice proxy for the Arctic. The same diene, but not monoene IP25, occurred in nine sea ice samples collected from various locations around Antarctica. The diene has been reported previously in Antarctic sea ice diatoms and the 13C isotopic compositions of the diene determined in two Antarctic sea ice samples were also consistent with an origin from sea ice diatoms (δ13C -5.7 to -8.5‰). In contrast, HBIs found in two Antarctic phytoplankton samples did not include the diene but comprised a number of tri- to pentaenes. In sediment samples collected near Adélie Land, East Antarctica, both the diene and the tri- to pentaenes often co-occurred. 13C isotopic compositions of the tri- to pentaenes in three sediment samples ranged from -35 to -42‰ whereas that of the diene in a sediment sample was -18‰. We propose the presence of this isotopically 13C enriched HBI diene in Antarctic sediments to be a useful proxy indicator for contributions of organic matter derived from sea ice diatoms. A ratio of the concentrations of diene/trienes might reflect the relative contributions of sea ice to phytoplanktonic inputs of organic matter to Antarctic sediments.
Programme: 1010
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Closset I., C., P., Rowland S.J., Schmidt S., Belt S., Snape, I., Thomas, D.N., Crosta, X., Massé G. ISAES 2011, Edinburgh, UK, 10-15 July 2011. (2011). Highly Branched Isoprenoids as proxies for variable sea ice conditions in the Southern Ocean .
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