https://ipt.biodiversity.aq/resource?r=antarctic_subantarctic_asteroidea_isotopes Stable isotope ratios of C, N and S in Southern Ocean sea stars (1985-2017) Baptiste Le Bourg ULiège PostDoc
BE
0000-0002-1455-2020
Camille Moreau Université Libre de Bruxelles PostDoc
BE
0000-0002-0981-7442
Gilles Lepoint ULiège Research Associate
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0000-0003-4375-0357
Bruno Danis Université Libre de Bruxelles Associate Professor
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0000-0002-9037-7623
Loïc N Michel Ifremer Research scientist loicnmichel@gmail.com https://loicnmichel.com/ 0000-0003-0988-7050 Camille Moreau mr.moreau.camille@gmail.com Baptiste Le Bourg ULiège PostDoc
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0000-0002-1455-2020
Camille Moreau mr.moreau.camille@gmail.com user Baptiste Le Bourg ULiège PostDoc
BE
0000-0002-1455-2020
2021-04-27 eng This dataset is a compilation of stable isotope ratios of C, N and S in tissues of 2456 sea stars sampled from 1985 to 2017 in the Southern Ocean (Antarctica and Subantarctic Islands). Stable isotope values were measured in the framework of Baptiste Le Bourg's PhD thesis at University of Liège, entitled “Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity”. Samples were provided by the University of Liège (Belgium), the Université Libre de Bruxelles (Belgium), the National Museum of Natural History (Paris, France) and the Institute of Oceanology of the Polish Academy of Sciences (Sopot, Poland). This work was supported by BELSPO through the vERSO and RECTO projects (contracts no. BR/132/A1/vERSO and BR/154/A1/RECTO). Occurrence Southern Ocean sea stars stable isotopes trophic ecology GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Specimen GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. Antarctic and Sub-Antarctic regions of the Southern Ocean -127.267 162.201 -47.717 -76.273 1985-01-11 2017-03-08 Echinodermata, Asteroidea class Asteroidea Sea star species Acodontaster capitatus species Acodontaster conspicuus species Acodontaster elongatus species Acodontaster hodgsoni species Acodontaster marginatus genus Acodontaster species Adelasterias papillosa species Anasterias antarctica species Anasterias perrieri genus Anasterias species Anteliaster scaber species Asterina fimbriata species Bathybiaster loripes genus Bathybiaster species Bathybiaster vexillifer genus Anseropoda species Cheiraster (Luidiaster) gerlachei species Cheiraster (Luidiaster) planeta subgenus Cheiraster (Luidiaster) species Cheiraster complex species Cheiraster hirsutus genus Cheiraster species Cosmasterias lurida species Cuenotaster involutus species Cycethra verrucosa species Diplasterias brandti species Diplasterias brucei species Diplasterias meridionalis genus Diplasterias species Diplodontias singularis species Dytaster felix family Echinasteridae species Eremicaster pacificus genus Eremicaster species Freyastera tuberculata species Freyella attenuata species Glabraster antarctica species Henricia smilax genus Henricia species Hippasteria phrygiana species Hymenaster sacculatus genus Hymenaster genus Hyphalaster species Kampylaster incurvatus species Kenrickaster pedicellaris species Labidiaster annulatus species Labidiaster radiosus species Leptychaster flexuosus species Leptychaster kerguelensis species Lophaster furcilliger species Lophaster gaini genus Lophaster species Lophaster stellans species Lysasterias adeliae species Lysasterias digitata genus Lysasterias species Macroptychaster accrescens genus Mixaster species Notasterias armata species Notasterias bongraini species Notasterias candicans genus Notasterias species Notasterias stolophora species Notioceramus anomalus species Odinella nutrix species Odontaster meridionalis species Odontaster pearsei species Odontaster penicillatus species Odontaster roseus genus Odontaster species Odontaster validus species Paralophaster antarcticus species Paralophaster lorioli genus Paralophaster genus Pedicellaster species Peribolaster folliculatus species Peribolaster macleani genus Peribolaster species Perknaster densus species Perknaster fuscus species Perknaster sladeni genus Perknaster species Porcellanaster ceruleus species Psalidaster mordax species Pseudarchaster discus species Psilaster charcoti genus Pteraster species Pteraster affinis species Pteraster stellifer family Pterasteridae species Remaster gourdoni species Rhopiella hirsuta species Saliasterias brachiata species Smilasterias scalprifera genus Smilasterias species Smilasterias triremis species Solaster longoi species Solaster regularis genus Solaster species Styracaster chuni species Tremaster mirabilis unkown Baptiste Le Bourg ULiège PostDoc
BE
0000-0002-1455-2020
Camille Moreau Université Libre de Bruxelles PostDoc
BE
0000-0002-0981-7442
Sampling: Sea stars were sampled in the Southern Ocean from 1985 to 2017 throughout multiple oceanographic campaigns. Storage: Depending of the sampling campaign, sea stars were frozen, dried, stored in ethanol or fixed with formaldehyde and then stored in ethanol. Sample preparation: For each sea star, one or several arms were separated from the central disc. Internal organs and podia were removed in each arm. With the exception of the already dried samples, the tegument and the podia of each arm were washed with demineralised water and oven-dried at 50°C during 48 hours. All samples were then homogenised into powder. Carbonates were removed from subsamples by exposing subsamples to 37 % hydrochloric acid vapour during 48 hours. Acidified subsamples were then kept at 60°C until further sample preparation. Stable isotope analysis: The subsamples were then precisely weighed (ca 2.5-3 mg) in 5×8 tin cups with ca 3 mg of tungsten trioxide. Their elemental composition and their stable isotope values were analysed with an elemental analyser coupled to a continuous-flow isotope-ratio mass spectrometer. Impact of preservation on stable isotope values: Correction factors were added to the δ13C and δ34S values of sea stars fixed with formaldehyde and/or stored in ethanol as fixation in formaldehyde and preservation in ethanol impact stable isotope values in sea stars (Le Bourg et al., 2020). For samples stored in ethanol, a correction factor of –0.6 ‰ was subtracted to δ13C values. For samples fixed with formaldehyde and then stored in ethanol, a correction factor of 0.2 ‰ was added to δ13C values to take into account the effects of both ethanol (–0.6 ‰) and formaldehyde (+0.8 ‰) on δ13C values. A correction factor of 1.5 ‰ was also added to δ34S values for samples fixed with formaldehyde. Reference: Le Bourg B, Lepoint G, Michel LN. 2020. Effects of preservation methodology on stable isotope compositions of sea stars. Rapid Communications in Mass Spectrometry 34, e8589. A double sampling strategy was set up to maximise the scope of this PhD thesis. First, sea stars were collected in the Southern Ocean during campaigns taking place in the framework of the vERSO and RECTO projects from December 2015 to March 2017. Second, suitable samples originating from multiple oceanographic campaigns and surveys from January 1985 to January 2015 were retrieved from archived collections stored in museums or institutions. Institutions that provided samples included the Université Libre de Bruxelles (Belgium), the National Museum of Natural History (Paris, France) and the Institute of Oceanology of the Polish Academy of Sciences (Sopot, Poland). Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity Baptiste Le Bourg 0000-0002-1455-2020 author The data presented here were obtained in the framework of a PhD project. The goal of this PhD project was to study the trophic ecology of sea stars in the Southern Ocean using stable isotopes of carbon, nitrogen and sulfur. In particular, the relationship between trophic ecology and environmental conditions was assessed. The functioning of Southern Ocean ecosystems and the impact of climate change on them was thus a central theme of the PhD thesis. Indeed, changes in the availability of trophic resources induced by environmental changes can lead to changes of trophic ecology of species and of trophic interactions between them. This PhD thesis was carried out as part of the vERSO (Ecosystem Responses to global change: a multiscale approach in the Southern Ocean; BR/132/A1/vERSO) and RECTO (Refugia and Ecosystem Tolerance in the Southern Ocean; BR/154/A1/RECTO) projects, funded by the Belgian Science Policy Office (BELSPO). This project was funded thanks to a FRIA doctoral grant (Fund for research training in industry and agriculture) provided by the FRS-FNRS.
2021-01-29T09:27:26.072+00:00 dataset Le Bourg B, Moreau C, Lepoint G, Danis B, Michel L N (2021): Stable isotope ratios of C, N and S in Southern Ocean sea stars (1985-2017). v1.2. Antarctic Biodiversity Information Facility (ANTABIF). Dataset/Occurrence. https://ipt.biodiversity.aq/resource?r=antarctic_subantarctic_asteroidea_isotopes&v=1.2 https://ipt.biodiversity.aq/resource?id=antarctic_subantarctic_asteroidea_isotopes/v1.2.xml