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Maxime Bès de Berc, Dimitri Zigone, Peter Danecek, Alain Steyer, Francesco Zanolin, Alessia Maggi, Jean‐Yves Thoré, Armelle Bernard, Hervé Blumentritt, Sophie Lambotte, Jean‐Jacques Lévêque, Luis Rivera, Olivier Alemany, Philippe Possenti, Martin Vallée, Eléonore Stutzmann, Adriano Cavaliere, Nathalie Cotte, Stefano Marino, Baptiste Gombert, Wenceslas Marie‐Sainte, Nicolas Leroy, Constanza Pardo, Frédérick Pesqueira, Céleste Broucke |
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Title |
A New Posthole Seismometer at Concordia Permanent Research Facility in the Heart of the Icy East Antarctic Plateau |
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Journal |
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Year |
2023 |
Publication  |
Seismological research letters |
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In the Southern Hemisphere, the prevalence of oceans and the difficulty of access to land result in reduced coverage of seismological stations, limiting our detailed knowledge of Earth’s structures and of large earthquakes sources. This situation is exacerbated inside the antarctic continent, where only two permanent seismic stations are currently available (IU.QSPA at South Pole and G.CCD). The CCD station, built in early 2000s with state‐of‐the‐art surface instrumentation and located at the French–Italian Concordia base (75° S, 123° E), has been providing seismological data since 2008. However, it suffers from several problems: the vault is deformed by the hydrostatic pressure of the snow, the firn waveguide traps anthropogenic noise from the base causing strong noise below 1 s, and a coupling defect limits the performance above 30 s on the horizontal channels. To ensure the continuity of CCD and to improve its overall performance, we started in 2014 to plan the installation of a borehole seismometer at the site. In this article, we describe in detail this renovation of CCD and some examples of data analysis. The new borehole sensor shows that short‐period disturbances are largely attenuated (−20 dB at 0.1 s) compared to the surface installation and that the horizontal channels have a lower noise level at long periods (−8 dB at 100 s). Data for all components are below the standard noise model between 0.1 and 0.2 s, which makes this sensor one of the quietest installations in the world for this bandwidth. For periods >600 s we observe atmospheric pressure‐related perturbations on the vertical component. Despite this problem, the new CCD borehole station is a success with better‐than‐expected performances at all periods <600 s. The data produced are now distributed in the world’s data centers as G.CCD.20 and we encourage the scientific community to use the data for all studies requiring seismograms from Antarctica. |
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133 |
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0895-0695 |
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yes |
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8663 |
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Author |
A. Fougerat, L. Guérineau, N. Tellier |
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Title |
High-quality signal recording down to 0.001 Hz with standard MEMS accelerometers |
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Non peer-reviewed symposium |
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Year |
2018 |
Publication |
SEG Technical Program Expanded Abstracts 2018 |
Abbreviated Journal |
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0 |
Pages |
196-200 |
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Recording very low-frequency signal below 1 hertz is a major concern for seismology, in particular passive noise tomography, and is now also considered for some oil and gas applications. The seismic sensors commonly in use for hydrocarbon deposit surveys (geophones and previous generation of MEMS accelerometers) previously had performance limitations in such applications due to their technological design with very low-frequency signal being concealed by instrument noise. Tests on a recent generation of MEMS (Micro Electro-Mechanical System) sensor with an ultra-low noise floor were performed in our lab, and showed outstanding very low-frequency performance in terms of instrument noise and full scale. A teleseism that occurred during our tests was also duly detected. Presentation Date: Tuesday, October 16, 2018 Start Time: 1:50:00 PM Location: Poster Station 10 Presentation Type: Poster |
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133 |
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yes |
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7384 |
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Saucède T, Guillaumot C, Michel L, Fabri-ruiz S, Bazin A, Cabessut M, García-Berro A, Mateos A, Mathieu O, De Ridder C, Dubois P, Danis B, David B, Díaz A, Lepoint G, Motreuil S, Poulin E, Féral Jp |
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Title |
Modeling species response to climate change in sub-Antarctic islands – Echinoids as a case study for the Kerguelen Plateau. |
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Peer-reviewed symposium |
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Year |
2019 |
Publication |
Second symposium on kerguelen plateau marine ecosystems and fisheries |
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Pages |
95-116 |
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Keywords |
species distribution model, trophic niche, isotopic niche, biotic interaction, distribution dynamics |
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Abstract |
In the Kerguelen Islands, the multiple effects of climate change are expected to impact coastal marine habitats. Species distribution models (SDM) can represent a convenient tool to predict the biogeographic response of species to climate change but biotic interactions are not considered in these models. Nevertheless, new species interactions can emerge in communities exposed to environmental changes and the structure of biotic interactions is directly related to the potential resilience of ecosystems. Trophic interaction studies can help predict species vulnerability to environmental changes using carbon (δ13C) and nitrogen (δ15N) stable isotope ratios to generate trophic models. Using new available data inputs, we generated robust SDM and trophic interaction models to assess the potential response and sensitivity of three echinoid species to future worst-case scenarios of environmental change in the Kerguelen Plateau region. The two modelling approaches provide contrasting insights into the potential responses of each species to future environmental changes with both approaches identifying Abatus cordatus to be particularly vulnerable due to its narrow ecological niche and endemism to near-shore areas. Coupling insights gained from trophic niche ecology with species distribution modelling represents a promising approach that can improve our understanding and ability to predict the potential responses of species to future habitat changes. |
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1044 |
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978-1-876934-30-9 |
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yes |
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Call Number |
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Serial |
8064 |
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Author |
MacIntosh Andrew J J, Pelletier Laure, Chiaradia Andre, Kato Akiko, Ropert-Coudert Yan, |
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Title |
Temporal fractals in seabird foraging behaviour: diving through the scales of time
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Type |
Journal Article |
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Year |
2013 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
3 |
Issue |
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Pages |
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Keywords |
Behavioural ecology, Scale invariance, Statistical physics, Theoretical ecology, |
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Abstract |
Animal behaviour exhibits fractal structure in space and time. Fractal properties in animal space-use have been explored extensively under the Lévy flight foraging hypothesis, but studies of behaviour change itself through time are rarer, have typically used shorter sequences generated in the laboratory, and generally lack critical assessment of their results. We thus performed an in-depth analysis of fractal time in binary dive sequences collected via bio-logging from free-ranging little penguins (Eudyptula minor) across full-day foraging trips (216 data points; 4 orders of temporal magnitude). Results from 4 fractal methods show that dive sequences are long-range dependent and persistent across ca. 2 orders of magnitude. This fractal structure correlated with trip length and time spent underwater, but individual traits had little effect. Fractal time is a fundamental characteristic of penguin foraging behaviour, and its investigation is thus a promising avenue for research on interactions between animals and their environments. |
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Programme |
1091 |
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Bachelor's thesis |
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ISSN |
2045-2322 |
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yes |
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Call Number |
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Serial |
4326 |
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Author |
Leclaire Sarah, van Dongen Wouter F D, Voccia Steeve, Merkling Thomas, Ducamp Christine, Hatch Scott A, Blanchard Pierrick, Danchin Etienne, Wagner Richard H, |
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Title |
Preen secretions encode information on MHC similarity in certain sex-dyads in a monogamous seabird.
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Journal Article |
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Year |
2014 |
Publication |
Scientific reports |
Abbreviated Journal |
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Volume |
4 |
Issue |
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Pages |
6920-6920 |
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Keywords |
Alleles, Amino Acid Sequence, Animals, Avian Proteins, Avian Proteins: chemistry, Avian Proteins: genetics, Charadriiformes, Charadriiformes: physiology, Female, Genetic Variation, Grooming, Histocompatibility Antigens, Histocompatibility Antigens: chemistry, Histocompatibility Antigens: genetics, Male, Mating Preference, Animal, Molecular Sequence Data, Odors, Scent Glands, Scent Glands: secretion, |
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Abstract |
Animals are known to select mates to maximize the genetic diversity of their offspring in order to achieve immunity against a broader range of pathogens. Although several bird species preferentially mate with partners that are dissimilar at the major histocompatibility complex (MHC), it remains unknown whether they can use olfactory cues to assess MHC similarity with potential partners. Here we combined gas chromatography data with genetic similarity indices based on MHC to test whether similarity in preen secretion chemicals correlated with MHC relatedness in the black-legged kittiwake (Rissa tridactyla), a species that preferentially mates with genetically dissimilar partners. We found that similarity in preen secretion chemicals was positively correlated with MHC relatedness in male-male and male-female dyads. This study provides the first evidence that preen secretion chemicals can encode information on MHC relatedness and suggests that odor-based mechanisms of MHC-related mate choice may occur in birds.
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1162 |
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Nature Publishing Group |
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yes |
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Call Number |
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Serial |
5988 |
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Author |
Weimerskirch Henri, Delord Karine, Guitteaud Audrey, Phillips Richard A, Pinet Patrick, |
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Title |
Extreme variation in migration strategies between and within wandering albatross populations during their sabbatical year, and their fitness consequences.
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Journal Article |
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Year |
2015 |
Publication |
Scientific reports |
Abbreviated Journal |
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Volume |
5 |
Issue |
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Pages |
8853-8853 |
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Abstract |
Migratory behavior, routes and zones used during the non-breeding season are assumed to have been selected to maximize fitness, and can lead to genetic differentiation. Yet, here we show that migration strategies differ markedly between and within two genetically similar populations of wandering albatross Diomedea exulans from the Crozet and Kerguelen archipelagos in the Indian Ocean. Wandering albatrosses usually breed biennially if successful, and during the sabbatical year, all birds from Kerguelen migrate to the Pacific Ocean, whereas most from Crozet are sedentary. Instead of taking the shortest routes, which would involve a return against headwinds, migratory birds fly with the westerly winds, requiring detours of 10,000 s km. In total, migrants circumnavigate Antarctica 2 to 3 times, covering more than 120,000 km in a single sabbatical year. Our results indicate strong links between migratory behavior and fitness; all birds from Kerguelen breed biennially, whereas a significant proportion of those from Crozet, especially females, are sedentary and breed in consecutive calendar years. To breed annually, these females temporarily change mate, but return to their original partner in the following year. This extreme variation in migratory behavior has important consequences in term of life history evolution and susceptibility to climate change and fisheries. |
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109 |
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Nature Publishing Group |
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yes |
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6164 |
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Author |
Della Penna Alice, De Monte Silvia, Kestenare Elodie, Guinet Christophe, d'Ovidio Francesco, |
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Title |
Quasi-planktonic behavior of foraging top marine predators.
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Journal Article |
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Year |
2015 |
Publication |
Scientific reports |
Abbreviated Journal |
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Volume |
5 |
Issue |
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Pages |
18063-18063 |
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Abstract |
Monitoring marine top predators is fundamental for assessing the health and functioning of open ocean ecosystems. Although recently tracking observations have substantially increased, factors determining the horizontal exploration of the ocean by marine predators are still largely unknown, especially at the scale of behavioral switches (1-100 km, days-weeks). It is commonly assumed that the influence of water movement can be neglected for animals capable of swimming faster than the current. Here, we challenge this assumption by combining the use of biologging (GPS and accelerometry), satellite altimetry and in-situ oceanographic data (ADCP and drifting buoys) to investigate the effect of the mesoscale ocean dynamics on a marine predator, the southern elephant seal. A Lagrangian approach reveals that trajectories of elephant seals are characterized by quasi-planktonic bouts where the animals are horizontally drifting. These bouts correspond to periods of increased foraging effort, indicating that in the quasi-planktonic conditions energy is allocated to diving and chasing, rather than in horizontal search of favourable grounds. These results suggest that mesoscale features like eddies and fronts may act as a focal points for trophic interactions not only by bottom-up modulation of nutrient injection, but also by directly entraining horizontal displacements of the upper trophic levels. |
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109 |
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Nature Publishing Group |
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2045-2322 |
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yes |
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Call Number |
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Serial |
6191 |
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Author |
De Grissac Sophie, Börger Luca, Guitteaud Audrey, Weimerskirch Henri |
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Title |
Contrasting movement strategies among juvenile albatrosses and petrels |
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Journal Article |
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Year |
2016 |
Publication |
Scientific reports |
Abbreviated Journal |
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Volume |
6 |
Issue |
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Pages |
26103 |
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Abstract |
Animal movement is a fundamental eco-evolutionary process yet the behaviour of juvenile animals is largely unknown for many species, especially for soaring seabirds which can range widely over the oceans at low cost. |
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109 |
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2045-2322 |
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yes |
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6494 |
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Author |
V. Favier, D. Verfaillie, E. Berthier, M. Menegoz, V. Jomelli, J. E. Kay, L. Ducret, Y. Malbéteau, D. Brunstein, H. Gallée, Y.-H. Park & V. Rinterknecht |
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Title |
Atmospheric drying as the main driver of dramatic glacier wastage in the southern Indian Ocean |
Type |
Journal Article |
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Year |
2016 |
Publication |
Scientific reports |
Abbreviated Journal |
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6 |
Issue |
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Pages |
32396 |
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The ongoing retreat of glaciers at southern sub-polar latitudes is particularly rapid and widespread. Akin to northern sub-polar latitudes, this retreat is generally assumed to be linked to warming. |
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1154 |
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2045-2322 |
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yes |
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6548 |
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Author |
Tiphaine Jeanniard-du-Dot, Andrew W. Trites, John P. Y. Arnould, John R. Speakman, Christophe Guinet |
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Title |
Flipper strokes can predict energy expenditure and locomotion costs in free-ranging northern and Antarctic fur seals |
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Journal |
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Year |
2016 |
Publication |
Scientific reports |
Abbreviated Journal |
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6 |
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Pages |
33912 |
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Abstract |
Flipper strokes have been proposed as proxies to estimate the energy expended by marine vertebrates while foraging at sea, but this has never been validated on free-ranging otariids (fur seals and sea lions). Our goal was to investigate how well flipper strokes correlate with energy expenditure in 33 foraging northern and Antarctic fur seals equipped with accelerometers, GPS, and time-depth recorders. We concomitantly measured field metabolic rates with the doubly-labelled water method and derived activity-specific energy expenditures using fine-scale time-activity budgets for each seal. Flipper strokes were detected while diving or surface transiting using dynamic acceleration. Despite some inter-species differences in flipper stroke dynamics or frequencies, both species of fur seals spent 3.79 ± 0.39 J/kg per stroke and had a cost of transport of ~1.6–1.9 J/kg/m while diving. Also, flipper stroke counts were good predictors of energy spent while diving (R2 = 0.76) and to a lesser extent while transiting (R2 = 0.63). However, flipper stroke count was a poor predictor overall of total energy spent during a full foraging trip (R2 = 0.50). Amplitude of flipper strokes (i.e., acceleration amplitude × number of strokes) predicted total energy expenditure (R2 = 0.63) better than flipper stroke counts, but was not as accurate as other acceleration-based proxies, i.e. Overall Dynamic Body Acceleration. |
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109 |
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2045-2322 |
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2045-2322 |
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yes |
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Serial |
6604 |
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