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. (2016). The thermospheric auroral red line Angle of Linear Polarization (Vol. 121).
Abstract: The auroral red line at 630 nm is linearly polarized. Up to now, only its Degree of Linear Polarization had been studied. In this article, we examine for the first time the Angle of Linear Polarization (AoLP) and we compare the measurements to the apparent angle of the magnetic field at the location of the red line emission. We show that the AoLP is a tracer of the magnetic field configuration. This opens new perspectives, both in the frame of space weather and in the field of planetology.
Keywords: ionosphere polarization
Programme: 1026
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Labat J.P., Mayzaud P. & Sabini S. (2005). Population dynamics of Themisto gaudichaudii in Kerguelen Islands waters, Southern Indian Ocean. Polar Biol., 28(10), 776–783.
Abstract: Fieldwork was carried out at Kerguelen Islands. Two groups of stations in a coastal area, the Morbihan gulf, were surveyed. At both stations, macroplankton biomass ranged from 2.3 mg dry weight m-3 to 89 mg dry weight m-3and consisted mostly of Themisto gaudichaudii with values ranging from 1.9 mg dry weight m-3 to 50.6 mg dry weight m-3. Biomass was high for sub-Antarctic waters with marked seasonal and inter-zone differences. Biomass minima were observed at the end of the winter, from September to November, while maxima were recorded in summer and in early fall at the beginning of the year between January and April. T. gaudichaudii showed a recruitment of new size classes, mainly from November to January, followed by a rapid growth phase in summer. which slowed down during the southern winter period. Individuals breed after 1 year. Large individuals, older than 1 year, were not a significant presence in the gulf of Morbihan. The main pattern of the population dynamics were characterised by an univoltine life cycle with a very high biomass marked by a strong seasonal signal linked with the hydrological and trophic parameters of the Gulf.
Keywords: Invertebrata ; Arthropoda ; Crustacea ; Aquatic environment ; Climatic zone ; Antarctic Islands ; Kerguelen Islands ; Amphipoda ; Marine environment ; Polar region ; Indian Ocean ; Southern Ocean ; Kerguelen Islands ; Population dynamics
Programme: 353
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Leki V, Romanowicz B, . (2011). Inferring upper-mantle structure by full waveform tomography with the spectral element method
. 0956-540X, 185(2), 799–831.
Keywords: Inverse theory, Surface waves and free oscillations, Seismic anisotropy, Seismic tomography, Computational seismology, Wave propagation,
Programme: 133
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Visser K, Trampert J, Kennett B L N, . (2008). Global anisotropic phase velocity maps for higher mode Love and Rayleigh waves
. Geophysical Journal International, 172(3), 1016–1032.
Keywords: Inverse theory, Surface waves and free oscillations, Seismic anisotropy, Seismic tomography,
Programme: 133
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Lebedev Sergei, Van Der Hilst Rob D, . (2008). Global upper-mantle tomography with the automated multimode inversion of surface and S-wave forms
. Geophysical Journal International, 173(2), 505–518.
Keywords: Inverse theory, Numerical approximations and analysis, Mantle processes, Seismic tomography, Cratons, Dynamics of lithosphere and mantle,
Programme: 133
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. (2011). SCARDEC: a new technique for the rapid determination of seismic moment magnitude, focal mechanism and source time functions for large earthquakes using body-wave deconvolution
. 0956-540X, 184(1), 338–358.
Keywords: Inverse theory, Earthquake source observations, Body waves, Surface waves and free oscillations, Wave propagation, Subduction zone processes,
Programme: 133
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Tape Carl, Liu Qinya, Maggi Alessia, Tromp Jeroen, . (2010). Seismic tomography of the southern California crust based on spectral-element and adjoint methods
. Geophysical Journal International, 180(1), 433–462.
Keywords: Inverse theory, Body waves, Surface waves and free oscillations, Seismic tomography, Computational seismology, Crustal structure,
Programme: 133
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Laparie M, Larvor V, Frenot Y, Renault D, . (2012). Starvation resistance and effects of diet on energy reserves in a predatory ground beetle (Merizodus soledadinus; Carabidae) invading the Kerguelen Islands
. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 161(2), 122–129.
Abstract: The relationship between nutritional requirements and the availability or quality of food is a prime parameter in determining the geographical expansion of invasive insects. At the sub-Antarctic Kerguelen Islands, the invasive ground beetle Merizodus soledadinus becomes the main invertebrate predator when it colonizes new habitats, leading to the local extinction of native fly species. Such changes in the structure of prey communities may alter the energy management (storage and expenditure) of this predator. In this species, we monitored survival and body mass during food deprivation, in addition to evaluating the effects of two distinct diets (maggots versus enchytraeids) on the consumption and restoration of body reserves (sugars and triglycerides). We found that adults can starve for more than 60 days, and feed every 3.76 days on average when food is available. We recorded higher predation rates on maggots, associated with steeper body mass variations, compared to enchytraeids. Sugars and triglycerides were significantly consumed during food deprivation and restored after refeeding, but varied similarly among individuals supplied on the distinct diets. Other parameters may determine the food preferences observed, such as salt content in prey tissues, because M. soledadinus mainly feeds in hypersaline foreshore habitats, and may limit the consumption of osmotic conformers.
Keywords: Invasive insect, Glucose, Metabolic stores, Prey selection, Sub-Antarctic island, Trehalose, Triglyceride, Trophic stress,
Programme: 136
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Matthias Vignon, Mingsha Zhou, Angus R. McIntosh, Cristian Correa, Peter A. H. Westley, Lisa Jacquin, Jacques Labonne, Andrew P. Hendry. (2023). Trait variation in a successful global invader: a large-scale analysis of morphological variance and integration in the brown trout (Vol. 25).
Abstract: In ecology and evolution, the small population paradigm posits that reduced genetic variation will result in limited phenotypic variation that, in turn, will affect population resilience and potential for adaptation. Over the last decade though, such a paradigm has been questioned, with evidence that mechanisms independent of genetic variation may be also important in shaping phenotypic variation. However, there are few large-scale empirical examples, especially from aquatic ecosystems. Using the large-scale natural experiment afforded by the global invasion of brown trout (Salmo trutta), we quantify standing phenotypic variation in morphology among different introduced ranges, relative to the native range. By using shape variation and morphological integration as indicators of phenotypic variation, we show that neither founding population size nor time since founding (i.e., effect of selection regime) are correlated to the amount of morphological variation, contrarily to common expectations. Beyond founding population size and time since founding, the amount of morphological variation is mostly controlled by factors at the population level rather than at the region level, and is not lower in invaded regions compared to the native range. These results suggest that the dynamics of phenotypic variation may be largely independent of population size and mostly determined by site-specific patterns of selection.
Keywords: Invasion Morphological integration Phenotypic variation Population size
Programme: 1041
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. (2013). The complete history of salmonid introductions in the Kerguelen Islands, Southern Ocean
.36(4), 457–475-.
Keywords: Introductions, Colonization, Salmo, Oncorhynchus, Salvelinus, Kerguelen Islands,
Programme: 1041
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