An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data
International audience Comparing outputs of ecosystem models with estimates derived from experimental and observational approaches is important in creating valuable feedback for model construction, analyses and validation. Stable isotopes and mass-balanced trophic models are well-known and widely us...
Published in: | Progress in Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2014
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Online Access: | https://hal.science/hal-00922534 https://hal.science/hal-00922534/document https://hal.science/hal-00922534/file/Lassalle_et_al_2014_PROGRESS_OCEANOGR.pdf https://doi.org/10.1016/j.pocean.2013.09.002 |
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ftunivantilles:oai:HAL:hal-00922534v1 2024-04-14T08:16:19+00:00 An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data Lassalle, Géraldine Chouvelon, Tiphaine Bustamante, Paco Niquil, Nathalie LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) 2014-01-06 https://hal.science/hal-00922534 https://hal.science/hal-00922534/document https://hal.science/hal-00922534/file/Lassalle_et_al_2014_PROGRESS_OCEANOGR.pdf https://doi.org/10.1016/j.pocean.2013.09.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2013.09.002 hal-00922534 https://hal.science/hal-00922534 https://hal.science/hal-00922534/document https://hal.science/hal-00922534/file/Lassalle_et_al_2014_PROGRESS_OCEANOGR.pdf doi:10.1016/j.pocean.2013.09.002 info:eu-repo/semantics/OpenAccess ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-00922534 Progress in Oceanography, 2014, 120, pp.205-215. ⟨10.1016/j.pocean.2013.09.002⟩ Ecopath model isotopes trophic levels comparative studies validation ecosystem management North-East Atlantic Bay of Biscay continental shelf [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2014 ftunivantilles https://doi.org/10.1016/j.pocean.2013.09.002 2024-03-21T17:51:46Z International audience Comparing outputs of ecosystem models with estimates derived from experimental and observational approaches is important in creating valuable feedback for model construction, analyses and validation. Stable isotopes and mass-balanced trophic models are well-known and widely used as approximations to describe the structure of food webs, but their consistency has not been properly established as attempts to compare these methods remain scarce. Model construction is a data-consuming step, meaning independent sets for validation are rare. Trophic linkages in the French continental shelf of the Bay of Biscay food webs were recently investigated using both methodologies. Trophic levels for mono-specific compartments representing small pelagic fish and marine mammals and multi-species functional groups corresponding to demersal fish and cephalopods, derived from modelling, were compared with trophic levels calculated from independent carbon and nitrogen isotope ratios. Estimates of the trophic niche width of those species, or groups of species, were compared between these two approaches as well. A significant and close-to-one positive (r²Spearman = 0.72, n = 16, p<0.0001) correlation was found between trophic levels estimated by Ecopath modelling and those derived from isotopic signatures. Differences between estimates were particularly low for mono-specific compartments. No clear relationship existed between indices of trophic niche width derived from both methods. Given the wide recognition of trophic levels as a useful concept in ecosystem-based fisheries management, propositions were made to further combine these two approaches. Article in Journal/Newspaper North East Atlantic Université des Antilles (UAG): HAL Progress in Oceanography 120 205 215 |
institution |
Open Polar |
collection |
Université des Antilles (UAG): HAL |
op_collection_id |
ftunivantilles |
language |
English |
topic |
Ecopath model isotopes trophic levels comparative studies validation ecosystem management North-East Atlantic Bay of Biscay continental shelf [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
Ecopath model isotopes trophic levels comparative studies validation ecosystem management North-East Atlantic Bay of Biscay continental shelf [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Lassalle, Géraldine Chouvelon, Tiphaine Bustamante, Paco Niquil, Nathalie An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data |
topic_facet |
Ecopath model isotopes trophic levels comparative studies validation ecosystem management North-East Atlantic Bay of Biscay continental shelf [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience Comparing outputs of ecosystem models with estimates derived from experimental and observational approaches is important in creating valuable feedback for model construction, analyses and validation. Stable isotopes and mass-balanced trophic models are well-known and widely used as approximations to describe the structure of food webs, but their consistency has not been properly established as attempts to compare these methods remain scarce. Model construction is a data-consuming step, meaning independent sets for validation are rare. Trophic linkages in the French continental shelf of the Bay of Biscay food webs were recently investigated using both methodologies. Trophic levels for mono-specific compartments representing small pelagic fish and marine mammals and multi-species functional groups corresponding to demersal fish and cephalopods, derived from modelling, were compared with trophic levels calculated from independent carbon and nitrogen isotope ratios. Estimates of the trophic niche width of those species, or groups of species, were compared between these two approaches as well. A significant and close-to-one positive (r²Spearman = 0.72, n = 16, p<0.0001) correlation was found between trophic levels estimated by Ecopath modelling and those derived from isotopic signatures. Differences between estimates were particularly low for mono-specific compartments. No clear relationship existed between indices of trophic niche width derived from both methods. Given the wide recognition of trophic levels as a useful concept in ecosystem-based fisheries management, propositions were made to further combine these two approaches. |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) |
format |
Article in Journal/Newspaper |
author |
Lassalle, Géraldine Chouvelon, Tiphaine Bustamante, Paco Niquil, Nathalie |
author_facet |
Lassalle, Géraldine Chouvelon, Tiphaine Bustamante, Paco Niquil, Nathalie |
author_sort |
Lassalle, Géraldine |
title |
An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data |
title_short |
An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data |
title_full |
An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data |
title_fullStr |
An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data |
title_full_unstemmed |
An assessment of the trophic structure of the Bay of Biscay continental shelf food web: Comparing estimates derived from an ecosystem model and isotopic data |
title_sort |
assessment of the trophic structure of the bay of biscay continental shelf food web: comparing estimates derived from an ecosystem model and isotopic data |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-00922534 https://hal.science/hal-00922534/document https://hal.science/hal-00922534/file/Lassalle_et_al_2014_PROGRESS_OCEANOGR.pdf https://doi.org/10.1016/j.pocean.2013.09.002 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-00922534 Progress in Oceanography, 2014, 120, pp.205-215. ⟨10.1016/j.pocean.2013.09.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2013.09.002 hal-00922534 https://hal.science/hal-00922534 https://hal.science/hal-00922534/document https://hal.science/hal-00922534/file/Lassalle_et_al_2014_PROGRESS_OCEANOGR.pdf doi:10.1016/j.pocean.2013.09.002 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2013.09.002 |
container_title |
Progress in Oceanography |
container_volume |
120 |
container_start_page |
205 |
op_container_end_page |
215 |
_version_ |
1796314965003468800 |