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Jouventin P. & Aubin T. (2002). Acoustic systems are adapted to breeding ecologies: individual recognition in nesting penguins Pygoscelis adeliae and P. papua.. Animal behaviour, 64, 747–757.
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Cantin J.M. (1993).
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Houssou P. (1998). Doctoral thesis, , .
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. (2016). Acquisition of isotopic composition for surface snow in East Antarctica and the links to climatic parameters (Vol. 10).
Abstract: Abstract. The isotopic compositions of oxygen and hydrogen in ice cores are invaluable tools for the reconstruction of past climate variations. Used alone, they give insights into the variations of the local temperature, whereas taken together they can provide information on the climatic conditions at the point of origin of the moisture. However, recent analyses of snow from shallow pits indicate that the climatic signal can become erased in very low accumulation regions, due to local processes of snow reworking. The signal-to-noise ratio decreases and the climatic signal can then only be retrieved using stacks of several snow pits. Obviously, the signal is not completely lost at this stage, otherwise it would be impossible to extract valuable climate information from ice cores as has been done, for instance, for the last glaciation. To better understand how the climatic signal is passed from the precipitation to the snow, we present here results from varied snow samples from East Antarctica. First, we look at the relationship between isotopes and temperature from a geographical point of view, using results from three traverses across Antarctica, to see how the relationship is built up through the distillation process. We also take advantage of these measures to see how second-order parameters (d-excess and 17O-excess) are related to ?18O and how they are controlled. d-excess increases in the interior of the continent (i.e., when ?18O decreases), due to the distillation process, whereas 17O-excess decreases in remote areas, due to kinetic fractionation at low temperature. In both cases, these changes are associated with the loss of original information regarding the source. Then, we look at the same relationships in precipitation samples collected over 1 year at Dome C and Vostok, as well as in surface snow at Dome C. We note that the slope of the ?18O vs. temperature (T) relationship decreases in these samples compared to those from the traverses, and thus caution is advocated when using spatial slopes for past climate reconstruction. The second-order parameters behave in the same way in the precipitation as in the surface snow from traverses, indicating that similar processes are active and that their interpretation in terms of source climatic parameters is strongly complicated by local temperature effects in East Antarctica. Finally we check if the same relationships between ?18O and second-order parameters are also found in the snow from four snow pits. While the d-excess remains opposed to ?18O in most snow pits, the 17O-excess is no longer positively correlated to ?18O and even shows anti-correlation to ?18O at Vostok. This may be due to a stratospheric influence at this site and/or to post-deposition processes.
Programme: 1177
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. (2019).
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Alix C. (2002).2001/2002, 114–116.
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Vana J., Ochyra R., Lebouvier M., Cykowska B. & Bednarek-Ochyra H. (2009). Acrolophozia fuegiana R.M. Schust. [in Iles Kerguelen]. In: BLOCKEEL T. L. (ed.), New national and regional bryophyte records, 21. J. Bryol., 31, 132.
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Queyroy A., Couturier P., Paramelle P.J., Franco A. & Buguet A. (1996). Trav. sci. s.s.a., 14, 255–256.
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. (2019). Action-orientated research and framework: insights from the French long-term social-ecological research network (Vol. 24).
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. (2023). Active breeding seabirds prospect alternative breeding colonies (Vol. 201).
Abstract: Compared to other animal movements, prospecting by adult individuals for a future breeding site is commonly overlooked. Prospecting influences the decision of where to breed and has consequences on fitness and lifetime reproductive success. By analysing movements of 31 satellite- and GPS-tracked gull and tern populations belonging to 14 species in Europe and North America, we examined the occurrence and factors explaining prospecting by actively breeding birds. Prospecting in active breeders occurred in 85.7% of studied species, across 61.3% of sampled populations. Prospecting was more common in populations with frequent inter-annual changes of breeding sites and among females. These results contradict theoretical models which predict that prospecting is expected to evolve in relatively predictable and stable environments. More long-term tracking studies are needed to identify factors affecting patterns of prospecting in different environments and understand the consequences of prospecting on fitness at the individual and population level.
Keywords: Behavioural ecology Dispersal Gulls Movements Terns Tracking devices
Programme: 333
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