Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic)
International audience Most of the recent framework directives and environmental policies argue for the development and the use of indicators - notably trophodynamic indicators - that should be able to follow ecosystems' evolution in space and time, particularly under anthropogenic perturbation...
Published in: | Progress in Oceanography |
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Online Access: | https://hal.archives-ouvertes.fr/hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409/document https://hal.archives-ouvertes.fr/hal-00700409/file/Chouvelon_et_al._2012_PROGRESS_OCEANO.pdf https://doi.org/10.1016/j.pocean.2012.01.004 |
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ftccsdartic:oai:HAL:hal-00700409v1 2023-05-15T17:38:25+02:00 Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) Chouvelon, Tiphaine Spitz, Jérôme Caurant, Florence Mèndez-Fernandez, Paula Chappuis, Alexis Laugier, Flora Le Goff, Edwin Bustamante, Paco LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) 2012-08-01 https://hal.archives-ouvertes.fr/hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409/document https://hal.archives-ouvertes.fr/hal-00700409/file/Chouvelon_et_al._2012_PROGRESS_OCEANO.pdf https://doi.org/10.1016/j.pocean.2012.01.004 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2012.01.004 hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409/document https://hal.archives-ouvertes.fr/hal-00700409/file/Chouvelon_et_al._2012_PROGRESS_OCEANO.pdf doi:10.1016/j.pocean.2012.01.004 info:eu-repo/semantics/OpenAccess ISSN: 0079-6611 Progress in Oceanography https://hal.archives-ouvertes.fr/hal-00700409 Progress in Oceanography, Elsevier, 2012, 101 (1), pp.95-102. ⟨10.1016/j.pocean.2012.01.004⟩ temperate ecosystem nitrogen carbon trophic indicators sources of variations terrigenous influence [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.1016/j.pocean.2012.01.004 2021-11-07T04:38:37Z International audience Most of the recent framework directives and environmental policies argue for the development and the use of indicators - notably trophodynamic indicators - that should be able to follow ecosystems' evolution in space and time, particularly under anthropogenic perturbations. In the last decades, the use of stable carbon and nitrogen isotopes ratios has increased exponentially, particularly in studies of marine ecosystems' trophic structure and functioning. This method is principally based on the assumption that the isotopic composition of a consumer directly reflects that of its food. Nevertheless, few studies have attempted to define the limits of this tool before using it and drawing ecological conclusions from isotopic analysis. This study aimed to assess the importance of considering spatio-temporal variations in isotopic signatures of consumers when using δ13C and especially δ15N values in open ecosystems with complex food webs, using the Bay of Biscay (north-east Atlantic) as a case study. To this end, more than 140 species from this marine ecosystem were analysed for the isotopic signatures in their muscle tissue. They were sampled from coastal to oceanic and deep-sea areas and at different latitudes, to evaluate spatial variations of isotopic signatures. Selected species were also sampled over several years and in two seasons to account for inter-annual and seasonal variations. In the Bay of Biscay temperate ecosystem, which is subject to both coastal and oceanic influences (two main river inputs and upwelling areas), δ13C and δ15N values significantly decreased from inshore to offshore species and to a lesser extent from benthic to pelagic organisms. River discharges appeared to be the first factor influencing δ13C and δ15N values in consumers. From the important spatial variations detected in δ15N values in particular, we suggest that in such contrasted ecosystem, nitrogen isotopic ratios may also be revisited as an indicator of the feeding area. Moreover, we demonstrate that ... Article in Journal/Newspaper North East Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Progress in Oceanography 101 1 92 105 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
temperate ecosystem nitrogen carbon trophic indicators sources of variations terrigenous influence [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
temperate ecosystem nitrogen carbon trophic indicators sources of variations terrigenous influence [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Chouvelon, Tiphaine Spitz, Jérôme Caurant, Florence Mèndez-Fernandez, Paula Chappuis, Alexis Laugier, Flora Le Goff, Edwin Bustamante, Paco Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) |
topic_facet |
temperate ecosystem nitrogen carbon trophic indicators sources of variations terrigenous influence [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience Most of the recent framework directives and environmental policies argue for the development and the use of indicators - notably trophodynamic indicators - that should be able to follow ecosystems' evolution in space and time, particularly under anthropogenic perturbations. In the last decades, the use of stable carbon and nitrogen isotopes ratios has increased exponentially, particularly in studies of marine ecosystems' trophic structure and functioning. This method is principally based on the assumption that the isotopic composition of a consumer directly reflects that of its food. Nevertheless, few studies have attempted to define the limits of this tool before using it and drawing ecological conclusions from isotopic analysis. This study aimed to assess the importance of considering spatio-temporal variations in isotopic signatures of consumers when using δ13C and especially δ15N values in open ecosystems with complex food webs, using the Bay of Biscay (north-east Atlantic) as a case study. To this end, more than 140 species from this marine ecosystem were analysed for the isotopic signatures in their muscle tissue. They were sampled from coastal to oceanic and deep-sea areas and at different latitudes, to evaluate spatial variations of isotopic signatures. Selected species were also sampled over several years and in two seasons to account for inter-annual and seasonal variations. In the Bay of Biscay temperate ecosystem, which is subject to both coastal and oceanic influences (two main river inputs and upwelling areas), δ13C and δ15N values significantly decreased from inshore to offshore species and to a lesser extent from benthic to pelagic organisms. River discharges appeared to be the first factor influencing δ13C and δ15N values in consumers. From the important spatial variations detected in δ15N values in particular, we suggest that in such contrasted ecosystem, nitrogen isotopic ratios may also be revisited as an indicator of the feeding area. Moreover, we demonstrate that ... |
author2 |
LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Chouvelon, Tiphaine Spitz, Jérôme Caurant, Florence Mèndez-Fernandez, Paula Chappuis, Alexis Laugier, Flora Le Goff, Edwin Bustamante, Paco |
author_facet |
Chouvelon, Tiphaine Spitz, Jérôme Caurant, Florence Mèndez-Fernandez, Paula Chappuis, Alexis Laugier, Flora Le Goff, Edwin Bustamante, Paco |
author_sort |
Chouvelon, Tiphaine |
title |
Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) |
title_short |
Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) |
title_full |
Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) |
title_fullStr |
Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) |
title_full_unstemmed |
Revisiting the use of δ15N in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. The case of an open ecosystem: the Bay of Biscay (north-east Atlantic) |
title_sort |
revisiting the use of δ15n in meso-scale studies of marine food webs by considering spatio-temporal variations in stable isotopic signatures. the case of an open ecosystem: the bay of biscay (north-east atlantic) |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409/document https://hal.archives-ouvertes.fr/hal-00700409/file/Chouvelon_et_al._2012_PROGRESS_OCEANO.pdf https://doi.org/10.1016/j.pocean.2012.01.004 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
ISSN: 0079-6611 Progress in Oceanography https://hal.archives-ouvertes.fr/hal-00700409 Progress in Oceanography, Elsevier, 2012, 101 (1), pp.95-102. ⟨10.1016/j.pocean.2012.01.004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2012.01.004 hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409 https://hal.archives-ouvertes.fr/hal-00700409/document https://hal.archives-ouvertes.fr/hal-00700409/file/Chouvelon_et_al._2012_PROGRESS_OCEANO.pdf doi:10.1016/j.pocean.2012.01.004 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2012.01.004 |
container_title |
Progress in Oceanography |
container_volume |
101 |
container_issue |
1 |
container_start_page |
92 |
op_container_end_page |
105 |
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1766138854048268288 |