Stable isotope ratios of C, N and S in Southern Ocean sea stars (1985-2017)

Sea stars (Echinodermata: Asteroidea) are a key component of Southern Ocean benthos, with 16% of the known sea star species living there. In temperate marine environments, sea stars commonly play an important role in food webs, acting as keystone species. However, trophic ecology and functional role...

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Bibliographic Details
Main Authors: Le Bourg, Baptiste, Moreau, Camille, Balazy, Piotr, Danis, Bruno, Eléaume, Marc, Gan, Yi-Ming, Jossart, Quentin, Kuklinski, Piotr, Lepoint, Gilles, Saucède, Thomas, Van de Putte, Anton, Michel, Loïc N.
Format: Dataset
Language:English
Published: 2021
Subjects:
Southern Ocean
Antarctica
Subantarctic Islands
stable isotopes
elemental contents
biometric measurements
marine ecosystems
benthos
benthic invertebrates
sea stars
Asteroidea
Echinodermata
coastal
deep sea
Antarctic
The Antarctic
Antarc*
Online Access:https://zenodo.org/record/5535585
https://doi.org/10.5281/zenodo.5535585
Description
Summary:Sea stars (Echinodermata: Asteroidea) are a key component of Southern Ocean benthos, with 16% of the known sea star species living there. In temperate marine environments, sea stars commonly play an important role in food webs, acting as keystone species. However, trophic ecology and functional role of Southern Ocean sea stars are still poorly known, notably due to the scarcity of large-scale studies. Here, we report 24332 trophic marker (stable isotopes and elemental contents of C, N and S of tegument and/or tube feet) and biometric (arm length, disk radius, arm to disk ratio) measurements in 2456 specimens of sea stars. Samples were collected between 12/01/1985 and 08/10/2017 in numerous locations along the Antarctic littoral and Subantarctic islands. The spatial scope of the dataset covers a significant portion of the Southern Ocean (Latitude: 47.717° South to 86.273° South longitude: 127.767° West to 162.201° East depth: 6 to 5338 m). The dataset contains 133 distinct taxa, including 72 currently accepted species spanning 51 genera, 20 families and multiple feeding guilds / functional groups (suspension feeders, sediment feeders, omnivores, predators of mobile or sessile prey). For 505 specimens, mitochondrial CO1 genes were sequenced to confirm and/or refine taxonomic identifications, and those sequences are already publicly available through the Barcode of Life Data System. This number will grow in the future, as molecular analyses are still in progress. Overall, thanks to its large taxonomic, spatial, and temporal extent, as well as its integrative nature (combining genetic, morphological and ecological data), this dataset can be of wide interest to Southern Ocean ecologists, invertebrate zoologists, benthic ecologists, and environmental managers dealing with associated areas. Sources of funding: Belgian Federal Science Policy (BELSPO) BRAIN-be grants number BR/132/A1/VERSO and BR/154/A1/RECTO; Belgian Fund for Scientific Research (F.R.S.-FNRS) FRIA doctoral grant number 1.E091.16; French Polar ...

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