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Hreinsdottir Sigrun, Sigmundsson Freysteinn, Roberts Matthew J, Bjornsson Halldor, Grapenthin Ronni, Arason Pordur, Arnadottir Thora, Holmjarn Josef, Geirsson Halldor, Bennett Richard A, Gudmundsson Magnus T, Oddsson Bjorn, Ofeigsson Benedikt G, Villemin Thierry, Jonsson Thorsteinn, Sturkell Erik, Hoskuldsson Armann, Larsen Gudrun, Thordarson Thor, Oladottir Bergrun Arna, . (2014). Volcanic plume height correlated with magma-pressure change at Grimsvotn Volcano, Iceland
. Nature Geoscience, 7(3), 214–218.
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. (2015). Large-scale climatic anomalies affect marine predator foraging behaviour and demography.
. Nature communications, 6, 8220.
Abstract: Determining the links between the behavioural and population responses of wild species to environmental variations is critical for understanding the impact of climate variability on ecosystems. Using long-term data sets, we show how large-scale climatic anomalies in the Southern Hemisphere affect the foraging behaviour and population dynamics of a key marine predator, the king penguin. When large-scale subtropical dipole events occur simultaneously in both subtropical Southern Indian and Atlantic Oceans, they generate tropical anomalies that shift the foraging zone southward. Consequently the distances that penguins foraged from the colony and their feeding depths increased and the population size decreased. This represents an example of a robust and fast impact of large-scale climatic anomalies affecting a marine predator through changes in its at-sea behaviour and demography, despite lack of information on prey availability. Our results highlight a possible behavioural mechanism through which climate variability may affect population processes.
Programme: 109,394
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Eichhorn Gotz, Groscolas Rene, Le Glaunec Gaele, Parisel Camille, Arnold Laurent, Medina Patrice, Handrich Yves, . (2011). Heterothermy in growing king penguins
. Nature communications, 2, 435–.
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Picard G, Domine F, Krinner G, Arnaud L, Lefebvre E,. (2012). Inhibition of the positive snow-albedo feedback by precipitation in interior Antarctica. Bachelor's thesis, Nature Publishing Group, .
Keywords: limate change Cryospheric science
Programme: 1013
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Saraux Claire, Le Bohec Celine, Durant Joel M, Viblanc Vincent A, Gauthier-Clerc Michel, Beaune David, Park Young-Hyang, Yoccoz Nigel G, Stenseth Nils C, Le Maho Yvon, . (2011). Reliability of flipper-banded penguins as indicators of climate change
. NATURE, 469(7329), 203–206.
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Saether, B.-E.; Lande, R.; Engen, S.; Weimerskirch, H.; Lillegard, M.; Altwegg, R.; Becker, P.H.; Bregnballe, T.; Brommer, J.E.; McCleery, R.H.; Merila, J.; Nyholm, E.; Rendell, W.; Robertson, R.R.; Tryjanowski, P.; Visser, M.E. (2005). Generation time and temporal scaling of bird population dynamics. AADE editors' journal, 436(7047), 99–102.
Abstract: Theoretical studies have shown that variation in density regulation strongly influences population dynamics1, yet our understanding of factors influencing the strength of density dependence in natural populations still is limited2. Consequently, few general hypotheses have been advanced to explain the large differences between species in the magnitude of population fluctuations3, 4, 5, 6. One reason for this is that the detection of density regulation in population time series is complicated by time lags induced by the life history of species7, 8 that make it difficult to separate the relative contributions of intrinsic and extrinsic factors to the population dynamics. Here we use population time series for 23 bird species to estimate parameters of a stochastic density-dependent age-structured model. We show that both the strength of total density dependence in the life history and the magnitude of environmental stochasticity, including transient fluctuations in age structure, increase with generation time. These results indicate that the relationships between demographic and life-history traits in birds9, 10 translate into distinct population dynamical patterns that are apparent only on a scale of generations.
Programme: 109
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. (2005). High resolution climate record of the northern hemisphere reaching into last interglacial period. Nature, 431, 147–151.
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EPICA Community Members. (2004). Eight glacial cycles from an Antarctic ice core. Nature, 429(6992), 623–628.
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Ancel A., Visser H., Handrich Y., Masman D. & Le Maho Y. (1997). Energy saving in hudding penguins. Nature, 385, 304–305.
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White J.W.C. (1993). Don't touch that dial. Nature, 364, 186.
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