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Bekki S, Rap A, Poulain V, Dhomse S, Marchand M, Lefevre F, Forster PM, Szopa S, Chipperfield MP, . (2013). Climate impact of stratospheric ozone recovery
. Geophysical Research Letters, 40(11), 2796–2800.
Keywords: stratospheric ozone, climate, 0340 Middle atmosphere: composition and chemistry,
Programme: 209
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. (2012). (Vol. 117).
Keywords: stratosphere to troposphere exchange tropospheric ozone
Programme: 109
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Morin S, Savarino J, Frey M M, Domine F, Jacobi H-W, Kaleschke L, Martins J M F, . (2009). Comprehensive isotopic composition of atmospheric nitrate in the Atlantic Ocean boundary layer from 65S to 79N
. J. Geophys. Res., 114(D5), D05303–.
Keywords: stable isotopes, atmospheric nitrate, isotope anomaly, 0365 Atmospheric Composition and Structure: Troposphere: composition and chemistry, 0454 Biogeosciences: Isotopic composition and chemistry, 0469 Biogeosciences: Nitrogen cycling, 0305 Atmospheric Composition and Structure: Aerosols and particles, 9325 Geographic Location: Atlantic Ocean,
Programme: 1011
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. (2011). Multilocus analyses of an Antarctic fish species flock (Teleostei, Notothenioidei, Trematominae): Phylogenetic approach and test of the early-radiation event
. Mol. Phylogenet. Evol., 60(3), 305–316.
Abstract: Clades that have undergone episodes of rapid cladogenesis are challenging from a phylogenetic point of view. They are generally characterised by short or missing internal branches in phylogenetic trees and by conflicting topologies among individual gene trees. This may be the case of the subfamily Trematominae, a group of marine teleosts of coastal Antarctic waters, which is considered to have passed through a period of rapid diversification. Despite much phylogenetic attention, the relationships among Trematominae species remain unclear. In contrast to previous studies that were mostly based on concatenated datasets of mitochondrial and/or single nuclear loci, we applied various single-locus and multilocus phylogenetic approaches to sequences from 11 loci (eight nuclear) and we also used several methods to assess the hypothesis of a radiation event in Trematominae evolution. Diversification rate analyses support the hypothesis of a period of rapid diversification during Trematominae history and only a few nodes in the hypothetical species tree were consistently resolved with various phylogenetic methods. We detected significant discrepancies among trees from individual genes of these species, most probably resulting from incomplete lineage sorting, suggesting that concatenation of loci is not the most appropriate way to investigate Trematominae species interrelationships. These data also provide information about the possible effects of historic climate changes on the diversification rate of this group of fish.
Keywords: Species tree versus gene tree, Multilocus phylogeny, Diversification rate, Evolutionary radiation, Antarctic fish,
Programme: 1124
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. (2019). Modeling species response to climate change in sub-Antarctic islands – Echinoids as a case study for the Kerguelen Plateau. Bachelor's thesis, , .
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 (?13C) and nitrogen (?15N) 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.
Keywords: species distribution model, trophic niche, isotopic niche, biotic interaction, distribution dynamics
Programme: 1044
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. (2019). Modeling species response to climate change in sub-Antarctic islands – Echinoids as a case study for the Kerguelen Plateau..
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 (?13C) and nitrogen (?15N) 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.
Keywords: species distribution model, trophic niche, isotopic niche, biotic interaction, distribution dynamics
Programme: 1044
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. (2014). Study of the phytoplankton plume dynamics off the Crozet Islands (Southern Ocean): A geochemical-physical coupled approach
. Journal of Geophysical Research: Oceans, 119(4), 2227–2237.
Keywords: Southern Ocean, Crozet Islands, iron fertilization, radium, altimetry, GEOTRACES, 4825 Geochemistry, 4860 Radioactivity and radioisotopes, 4219 Continental shelf and slope processes, 4223 Descriptive and regional oceanography,
Programme: 1077
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. (2013). Instrumented elephant seals reveal the seasonality in chlorophyll and light-mixing regime in the iron-fertilized Southern Ocean
. Geophysical Research Letters, 40(24), 6368–6372.
Keywords: Southern Ocean, climatology, chlorophyll, iron fertilization, 4855 Phytoplankton, 4805 Biogeochemical cycles, processes, and modeling, 4894 Instruments, sensors, and techniques,
Programme: 109
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. (2011). Phylogeography and demographic inference in Nacella (Patinigera) concinna (Strebel, 1908) in the western Antarctic Peninsula
. Deep Sea Research Part II: Topical Studies in Oceanography, 58(12), 220–229.
Abstract: Endemic to Antarctic ecosystems, the limpet Nacella (Patinigera) concinna (Strebel, 1908) is an abundant and dominant marine benthic invertebrate of the intertidal and shallow subtidal zone. In order to examine the phylogeographic pattern and historical demography of the species along the western Antarctic Peninsula, we amplified 663 bp of the mitochondrial DNA cytochrome oxidase subunit I of 161 N. concinna specimens from five localities, as well as two specimens from South Georgia and Sub-Antarctic Marion Island. As two different morphotypes, one characterized by an elevated shell in the intertidal and the other by a flat one in the subtidal, have been recurrently reported for this species, we also compared intertidal and subtidal samples from two localities of King George Island (Admiralty and Fildes Bay) through geometric morphometric and genetic analyses. As a result, elliptic Fourier analyses on shell shape morphology detected highly significant differences between intertidal and subtidal morphotypes. In contrast, mtDNA analyses between these morphotypes did not detect statistical differences between them and support the hypothesis that subtidal and intertidal N. concinna forms correspond to be the same population unit.
Keywords: Southern Ocean, Antarctica, Nacella concinna, COI, Genetic structure, Median-joining network, Elliptic Fourier analysis, Bottleneck effect, Founder effect,
Programme: 1044
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. (2015). Variability of the Antarctic Circumpolar Current transport through the Fawn Trough, Kerguelen Plateau
. Deep Sea Research Part II: Topical Studies in Oceanography, 114, 12–26.
Keywords: Southern Ocean, ACC, Kerguelen Plateau, Fawn Trough, Altimetry, Jason, TOPEX-Poseidon, Volume transport,
Programme: 1061
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