Chambodut A., Bernard A. (2023).
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Genthon, C., le Consortium AWACA. (2023). Le projet AWACA.
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Bernard A., Chambodut A., Zigone D., Thore J-Y., Bes De Berc M., Fotze M.,Wardinski,I. (2023). Bachelor's thesis, , .
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Prat R., Dupuis E., Sultan E. (2023).
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Forget F., Bretel P., Genthon C., Berne A., Dufresne J.L., Lemonnier F., Madeleine J.B, Roussel M.R., Sultan E., Veron D., Vignon E., Wiener V. (2023).
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. (2023). Climate Change Helps Polar Invasives Establish and Flourish: Evidence from Long-Term Monitoring of the Blowfly Calliphora vicina (Vol. 12).
Abstract: The isolated sub-Antarctic islands are of major ecological interest because of their unique species diversity and long history of limited human disturbance. However, since the presence of Europeans, these islands and their sensitive biota have been under increasing pressure due to human activity and associated biological invasions. In such delicate ecosystems, biological invasions are an exceptional threat that may be further amplified by climate change. We examined the invasion trajectory of the blowfly Calliphora vicina (Robineau-Desvoidy 1830). First introduced in the sub-Antarctic Kerguelen Islands in the 1970s, it is thought to have persisted only in sheltered microclimates for several decades. Here, we show that, in recent decades, C. vicina has been able to establish itself more widely. We combine experimental thermal developmental data with long-term ecological and meteorological monitoring to address whether warming conditions help explain its current success and dynamics in the eastern Kerguelen Islands. We found that warming temperatures and accumulated degree days could explain the species' phenological and long-term invasion dynamics, indicating that climate change has likely assisted its establishment. This study represents a unique long-term view of a polar invader and stresses the rapidly increasing susceptibility of cold regions to invasion under climate change.
Programme: 136
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Douce P., Saiz H., Benot M.-l., Mermillod-blondin F., Simon L., Renault D., Vallier F., Oury Y., Fontaine M., Bittebiere A.-k. (2023). Functional characteristics rather than co-occurrences determine the outcome of interactions between neighbouring plants in sub-Antarctic ponds: Consequences for macrophyte community biomass (Vol. 68).
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. (2023). (Vol. 210).
Keywords: Antipredator behaviour Escape flight distance Optimal escape decisions Predation risk Predator-prey decision Risk taking
Programme: 119
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Antonella Tassone, Olivier Magand, Attilio Naccarato, Maria Martino, Domenico Amico, Francesca Sprovieri, Hippolyte Leuridan, Yann Bertrand, Michel Ramonet, Nicola Pirrone, Aurelien Dommergue. (2023). Seven-year monitoring of mercury in wet precipitation and atmosphere at the Amsterdam Island GMOS station (Vol. 9). Bachelor's thesis, , .
Keywords: Atmospheric pollution Atmospheric transport Mercury measurements Source identification Southern Hemisphere Wet deposition flux
Programme: 416,1028
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Diane Espel, Camille Coux, Luis R. Pertierra, Pauline Eymar-Dauphin, Jonas J. Lembrechts, David Renault. (2023). Functional Niche Partitioning Occurs over Body Size but Not Nutrient Reserves nor Melanism in a Polar Carabid Beetle along an Altitudinal Gradient (Vol. 14).
Abstract: Phenotypic plasticity can favor the emergence of different morphotypes specialized in specific ranges of environmental conditions. The existence of intraspecific partitioning confers resilience at the species scale and can ultimately determine species survival in a context of global changes. Amblystogenium pacificum is a carabid beetle endemic to the sub-Antarctic Crozet Islands, and it has two distinctive morphotypes based on body coloration. For this study, A. pacificum specimens of functional niches were sampled along an altitudinal gradient (as a proxy for temperature), and some morphological and biochemical traits were measured. We used an FAMD multivariate analysis and linear mixed-effects models to test whether these traits were related to morphotype, altitude, and sexual dimorphism. We then calculated and compared the functional niches at different altitudes and tested for niche partitioning through a hypervolume approach. We found a positive hump-shaped correlation between altitude and body size as well as higher protein and sugar reserves in females than in males. Our functional hypervolume results suggest that the main driver of niche partitioning along the altitudinal gradient is body size rather than morphotype or sex, even though darker morphotypes tended to be more functionally constrained at higher altitudes and females showed limited trait variations at the highest altitude.
Keywords: Amblystogenium pacificum Carabidae dimorphism French sub-Antarctic islands functional diversity melanism thermal tolerance
Programme: 136
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