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Candice Michelot, Akiko Kato, Thierry Raclot, Yan Ropert-Coudert. (2021). (Vol. 16).
Keywords: Animal behavior Animal sexual behavior Animal sociality Birds Foraging Nesting habits Penguins Reproductive success
Programme: 1091
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. (2021). The high diversity of Southern Ocean sea stars (Asteroidea) reveals original evolutionary pathways (Vol. 190). Bachelor's thesis, , .
Abstract: Benthic life in the Southern Ocean (SO) features unique life history traits and species assemblages, but the origin and evolution of many of these taxonomic groups is still unclear. Sea stars (Asteroidea) are a diversified and abundant component of benthic ecosystems in the SO, in which they can play key ecological roles. Former studies suggest that the diversity of the entire class is still poorly known and underestimated, hampering the assessment of the origin and evolution of the class in the SO. In the present study, we analyse spatial patterns of SO sea star diversity using an occurrence database of ~14,000 entries. The biogeographic analysis is coupled with the exploration of an extensive molecular phylogeny based on over 4,400 specimen sequences to inform, support and/or question the observed diversity patterns. We show that the current taxonomy of SO asteroids needs revision and that their diversity has generally been overlooked and misinterpreted. Molecular results highlight the recent diversification of most studied taxa, at genus and species levels, which supports an evolutionary scenario referring to successive invasion and exchange events between the SO and adjacent regions, and clade diversification during periods of rapid environmental changes driven by the succession of glacial cycles. Our work advocates for employing, and endorsing the use of extensive genetic barcode libraries for biodiversity studies.
Keywords: Antarctica Biodiversity COI mtDNA Echinodermata Evolution Phylogeography
Programme: 1044,1124
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. (2021). (Vol. 103).
Keywords: Antarctica Asteroidea benthos biometric measurements Echinodermata elemental contents invertebrates marine ecosystems sea stars Southern Ocean stable isotopes subantarctic Islands
Programme: 1044
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Camille Lemonnier. (2021). Coping with socially stressful environments in colonial seabirds: a test of adaptive phenotype programming in king penguins (Aptenodytes patagonicus).
Abstract: Group-living is associated with both fitness benefits and costs for animals. In seabird colonies, spatial heterogeneity in social density and other environmental parameters may affect the quality of breeding territories. For instance, in king penguins, increased conspecific density has been correlated with increased stress hormone levels and increased energy expenditure in individual birds, suggesting a cost of colonial breeding. We unravelled the influences of early (genetic and early maternal effects) and rearing environments on chick growth trajectories, stress physiology and survival. Our results suggest that the rearing social environment (rather than biological background) can influence chicks’ phenotype, growth and survival. Especially, chicks reared in high density areas of the colony showed increased weight gain and survival probabilities. These results suggest either a difference in terms of parental quality between individual breeding at high and low social densities or a difference in chick’s competitiveness due to their early life social environment.
Programme: 119
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. (2021). Inter-annual variation in winter distribution affects individual seabird contamination with mercury (Vol. 676).
Keywords: Biologging Feathers Migration North Atlantic-Arctic Pollutant
Programme: 388
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Buscetti, M. (2021). Influence of geomagnetic storms on seismometers.
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Benjamin Pohl, Vincent Favier, Jonathan Wille, Danielle G Udy, Tessa R Vance, Julien Pergaud, Niels Dutrievoz, Juliette Blanchet, Christoph Kittel, Charles Amory, Gerhard Krinner, Francis Codron. (2021). Relationship Between Weather Regimes and Atmospheric Rivers in East Antarctica (Vol. 126).
Keywords: atmospheric rivers East Antarctica snowfall amounts temperature anomalies weather regimes
Programme: 411
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. (2021). Recent Climate Variability around the Kerguelen Islands (Southern Ocean) Seen through Weather Regimes (Vol. 60). Bachelor's thesis, , .
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. (2021). Strong migratory connectivity across meta-populations of sympatric North Atlantic seabirds (Vol. SEA).
Keywords: Environmental niche Inter-population mixing Large-scale spatiotemporal dynamics Light-level geolocation Murres Population spread Seasonality
Programme: 388
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. (2021). Individual migration strategy fidelity but no habitat specialization in two congeneric seabirds (Vol. 48).
Keywords: guillemots light-level geolocation murres Uria aalge Uria lomvia
Programme: 388
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