Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula

Stable isotopes of C and N have been used to assess the effect of the duration of the sea ice season on the structure of benthic, Antarctic coastal food webs. Samples of suspended particulate organic matter, macroalgae and macroinvertebrates were collected at five subtidal rocky sites across a latit...

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Autores: Cardona Pascual, Luis, Lloret-Lloret, Elena, Moles, Juan, Ávila Escartín, Conxita
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/184895
Acceso en línea:https://hdl.handle.net/2445/184895
Access Level:acceso abierto
Palabra clave:Esponges
Feofícies
Estrelles de mar
Gastròpodes
Antàrtida
Sponges
Brown algae
Starfishes
Gastropods
Antarctica
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spelling Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic PeninsulaCardona Pascual, LuisLloret-Lloret, ElenaMoles, JuanÁvila Escartín, ConxitaEspongesFeofíciesEstrelles de marGastròpodesAntàrtidaSpongesBrown algaeStarfishesGastropodsAntarcticaStable isotopes of C and N have been used to assess the effect of the duration of the sea ice season on the structure of benthic, Antarctic coastal food webs. Samples of suspended particulate organic matter, macroalgae and macroinvertebrates were collected at five subtidal rocky sites across a latitudinal gradient along the western Antarctic Peninsula and among the South Shetland Islands. We tested the hypotheses that trophic positions of omnivores decrease, and food web structure becomes more redundant at higher latitudes. A latitudinal shift in the isotope baseline was detected for both δ13C and δ15N, but the trophic positions of macroinvertebrates and their relative positions along the δ13C axis and were basically constant across sites, even after rescaling stable isotope ratios to account for shifts in the baseline. Although the northernmost and southernmost study sites differed significantly in most of the metrics of the food web structure, changes with latitude and the duration of the sea ice season were non-monotonic. Highly productive phytoplankton blooms during the ice-free season at Esperanza Bay and Rothera Point may explain the observed pattern, as they result in a massive supply of planktonic organic matter to the detritus bank in the seabed and, hence, shorten the C range and increase trophic redundancy. If this hypothesis is correct, the intensity of the summer phytoplankton bloom can be as relevant for the structure of the benthic marine food web as the duration of the sea ice season.Elsevier B.V.2022202220212022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion10 p.application/pdfhttps://hdl.handle.net/2445/184895Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.marenvres.2021.105290Marine Environmental Research, 2021, vol. 167, p. 105290https://doi.org/10.1016/j.marenvres.2021.105290cc-by (c) Cardona Pascual, Luis et al., 2021http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1848952026-05-29T05:05:01Z
dc.title.none.fl_str_mv Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
title Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
spellingShingle Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
Cardona Pascual, Luis
Esponges
Feofícies
Estrelles de mar
Gastròpodes
Antàrtida
Sponges
Brown algae
Starfishes
Gastropods
Antarctica
title_short Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
title_full Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
title_fullStr Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
title_full_unstemmed Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
title_sort Latitudinal changes in the trophic structe of benthic coastal food webs along the Antarctic Peninsula
dc.creator.none.fl_str_mv Cardona Pascual, Luis
Lloret-Lloret, Elena
Moles, Juan
Ávila Escartín, Conxita
author Cardona Pascual, Luis
author_facet Cardona Pascual, Luis
Lloret-Lloret, Elena
Moles, Juan
Ávila Escartín, Conxita
author_role author
author2 Lloret-Lloret, Elena
Moles, Juan
Ávila Escartín, Conxita
author2_role author
author
author
dc.subject.none.fl_str_mv Esponges
Feofícies
Estrelles de mar
Gastròpodes
Antàrtida
Sponges
Brown algae
Starfishes
Gastropods
Antarctica
topic Esponges
Feofícies
Estrelles de mar
Gastròpodes
Antàrtida
Sponges
Brown algae
Starfishes
Gastropods
Antarctica
description Stable isotopes of C and N have been used to assess the effect of the duration of the sea ice season on the structure of benthic, Antarctic coastal food webs. Samples of suspended particulate organic matter, macroalgae and macroinvertebrates were collected at five subtidal rocky sites across a latitudinal gradient along the western Antarctic Peninsula and among the South Shetland Islands. We tested the hypotheses that trophic positions of omnivores decrease, and food web structure becomes more redundant at higher latitudes. A latitudinal shift in the isotope baseline was detected for both δ13C and δ15N, but the trophic positions of macroinvertebrates and their relative positions along the δ13C axis and were basically constant across sites, even after rescaling stable isotope ratios to account for shifts in the baseline. Although the northernmost and southernmost study sites differed significantly in most of the metrics of the food web structure, changes with latitude and the duration of the sea ice season were non-monotonic. Highly productive phytoplankton blooms during the ice-free season at Esperanza Bay and Rothera Point may explain the observed pattern, as they result in a massive supply of planktonic organic matter to the detritus bank in the seabed and, hence, shorten the C range and increase trophic redundancy. If this hypothesis is correct, the intensity of the summer phytoplankton bloom can be as relevant for the structure of the benthic marine food web as the duration of the sea ice season.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/184895
url https://hdl.handle.net/2445/184895
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.marenvres.2021.105290
Marine Environmental Research, 2021, vol. 167, p. 105290
https://doi.org/10.1016/j.marenvres.2021.105290
dc.rights.none.fl_str_mv cc-by (c) Cardona Pascual, Luis et al., 2021
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Cardona Pascual, Luis et al., 2021
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 10 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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