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
BE
0000-0003-4375-0357
Bruno
Danis
Université Libre de Bruxelles
Associate Professor
BE
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
BE
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