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Aurelien Dommergue, Pierre Amato, Romie Tignat-Perrier, Olivier Magand, Alban Thollot, Muriel Joly, Laetitia Bouvier, Karine Sellegri, Timothy Vogel, Jeroen E. Sonke, Jean-Luc Jaffrezo, Marcos Andrade, Isabel Moreno, Casper Labuschagne, Lynwill Martin, Qianggong Zhang, Catherine Larose. (2019). Methods to Investigate the Global Atmospheric Microbiome (Vol. 10).
Keywords: aerobiology Aerosols Atmosphere Biodiversity biogeography methods microorganisms Protocols
Programme: 1028
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Pearce, D.A., Alekhina, I.A., Terauds, A., Wilmotte, A., Quesada, A., Edwards, A., Dommergue, A., Sattler, B., Adams, B., Magalhães, C.M., Chu, W.-L., Lau, M., Cary, S.C., Smith, D.J., Wall, D.H., Eguren, G., Matcher, G., Bradley, J., De Vera, J.-P.P., Elster, J., Hughes, K.A., Benning, L.G., Gunde - Cimerman, N., Convey, P., Hong, S.G., Pointing, S.B., Pellizari, V.H., Vincent, W.F., 2016. . (2016). Aerobiology over Antarctica – a new initiative for atmospheric ecology. 1664-302X, 7.
Abstract: The role of aerial dispersal in shaping patterns of biodiversity remains poorly understood, mainly due to a lack of coordinated efforts in gathering data at appropriate temporal and spatial scales. It has been long known that the rate of dispersal to an ecosystem can significantly influence ecosystem dynamics, and that aerial transport has been identified as an important source of biological input to remote locations. With the considerable effort devoted in recent decades to understanding atmospheric circulation in the south polar region, a unique opportunity has emerged to investigate the atmospheric ecology of Antarctica, from local to continental scales. This concept note identifies key questions in Antarctic microbial biogeography and the need for standardized sampling and analysis protocols to address such questions. A consortium of polar aerobiologists is established to bring together researchers with a common interest in the airborne dispersion of microbes and other propagules in the Antarctic, with opportunities for comparative studies in the Arctic.
Programme: 1028
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Maccario Lorrie, Vogel Timothy, Larose Catherine, . (2014). Potential drivers of microbial community structure and function in Arctic snow
. Frontiers in Microbiology , 5 ( ).
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. (2023). Improved accuracy and spatial resolution for bio-logging-derived chlorophyll a fluorescence measurements in the Southern Ocean (Vol. 10).
Keywords: bio-logging tag chla fluorescence Sensor calibration Southern elephant seal Southern Ocean Submesoscale
Programme: 1201
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. (2021). (Vol. 8).
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Rob Harcourt, Mark A. Hindell, Clive R. McMahon, Kimberly T. Goetz, Jean-Benoit Charrassin, Karine Heerah, Rachel Holser, Ian D. Jonsen, Michelle R. Shero, Xavier Hoenner, Rose Foster, Baukje Lenting, Esther Tarszisz, Matthew Harry Pinkerton. (2021). Regional Variation in Winter Foraging Strategies by Weddell Seals in Eastern Antarctica and the Ross Sea (Vol. 8).
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Angus F. Henderson, Clive R. McMahon, Rob Harcourt, Christophe Guinet, Baptiste Picard, Simon Wotherspoon, Mark A. Hindell. (2020). Inferring Variation in Southern Elephant Seal At-Sea Mortality by Modelling Tag Failure (Vol. 7).
Abstract: Identifying factors influencing survivorship is key to understanding population persistence. Although satellite telemetry is a powerful tool for studying remote animal ecology and behaviour it is rarely used for demographic studies because distinguishing the death of the animal (individual mortality) from failure of the tag (mechanical tag failure) has proven difficult. Southern elephant seals present an opportunity to separate tag failure from animal mortality thanks to the availability of large tracking datasets, broad knowledge of demographic rates, and because for these large animals, satellite tags are known not to influence mortality rates. A key rationale for investigating satellite telemetry to estimate mortality as compared to using traditional Capture-Mark-Recapture methods is the potential for obtaining spatially and temporally specific information, particularly while the animals are at sea and largely unobservable. We used satellite tag data from 182 seals from Isles Kerguelen, deployed between 2004 and 2018. Of these, 76 (42%) tags transmitted for the full post-moult foraging trip (max. 265 days for females and max. 305 days for sub-adult males) with the remaining 107 tags (58%) ceasing transmission at sea. We found that contrary to expectations, behavioural choices seem not to influence tag failure rates by mechanical means, rather the signals we detected seemed to align with previously described variation in mortality between groups. There was evidence, albeit limited, for an increase in tag failure for adult females in years with negative Southern Annular Mode (lower Southern Ocean productivity). We speculate that this increase in failure may suggest higher mortality in these years. Also, males using the Kerguelen Plateau had higher tag failure rates than those in the sea-ice zone, perhaps indicative of higher mortality. We suspect that these differences in tag failure rates between groups reflect variation in predator exposure and foraging success. This suggests satellite telemetry could be used to infer mortality events for southern elephant seals while they are at sea.
Programme: 1201
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. (2020). Diving Behavior of Mirounga leonina: A Functional Data Analysis Approach (Vol. 7).
Abstract: The diving behavior of southern elephant seals, Mirounga leonina, is investigated through the analysis of time-depth dive profiles. The originality of this work is to consider dive profiles as continuous curves. For this purpose, a Functional Data Analysis (FDA) approach is proposed for the shape analysis of a collection of dive profiles. Complexity of dive shapes is characterized by a mixture of three main shape variations accounting for about 80% of the entire variability: U or V shape, vertical depth variability during the bottom time, and skewed left or right. Model-based clustering allows the identification of eight dive shape clusters in a quick and automated way. Connection between shape patterns and classical descriptors, as well as the number of prey capture events, is achieved, showing that the clusters are coherent to specific foraging behaviors previously identified in the literature labeled as drift, exploratory and active dives. Finally, FDA is compared to classical methods relying on the computation of discrete dive descriptors. Results show that taking the shape of the dive as a whole is more resilient to corrupted or incomplete sampled data. FDA is, therefore, an efficient tool adapted for processing and comparing dive data with different sampling frequencies and for improving the quality and the accuracy of transmitted data.
Programme: 1201
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Sanne Muis, Maialen Irazoqui Apecechea, Job Dullaart, Joao de Lima Rego, Kristine Skovgaard Madsen, Jian Su, Kun Yan, Martin Verlaan. (2020). A High-Resolution Global Dataset of Extreme Sea Levels, Tides, and Storm Surges, Including Future Projections (Vol. 7).
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Lisa C. Matthes, C. J. Mundy, S. L.-Girard, M. Babin, G. Verin, J. K. Ehn. (2020). Spatial Heterogeneity as a Key Variable Influencing Spring-Summer Progression in UVR and PAR Transmission Through Arctic Sea Ice (Vol. 7).
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