Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea)
International audience Cold-water corals (CWC) are frequently reported from deep sites with locally accelerated currents that enhance seabed food particle supply. Moreover, zooplankton likely account for ecologically important prey items, but their contribution to CWC diet remains unquantified. We i...
Published in: | Marine Ecology Progress Series |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2009
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Subjects: | |
Online Access: | https://doi.org/10.3354/meps08361 https://hal.univ-brest.fr/hal-00455423/file/m397p125.pdf https://hal.univ-brest.fr/hal-00455423 |
id |
fttriple:oai:gotriple.eu:10670/1.a98zg5 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Cold-water corals Benthic community Mediterranean Sea Food web Stable isotopes Zooplankton Particulate organic matter envir geo |
spellingShingle |
Cold-water corals Benthic community Mediterranean Sea Food web Stable isotopes Zooplankton Particulate organic matter envir geo Carlier, Antoine Le Guilloux, Erwan Olu, Karine Sarrazin, Jozée Mastrototaro, Francesco Taviani, Marco Clavier, Jacques Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) |
topic_facet |
Cold-water corals Benthic community Mediterranean Sea Food web Stable isotopes Zooplankton Particulate organic matter envir geo |
description |
International audience Cold-water corals (CWC) are frequently reported from deep sites with locally accelerated currents that enhance seabed food particle supply. Moreover, zooplankton likely account for ecologically important prey items, but their contribution to CWC diet remains unquantified. We investigated the benthic food web structure of the recently discovered Santa Maria di Leuca (SML) CWC province (300 to 1100 m depth) located in the oligotrophic northern Ionian Sea. We analyzed stable isotopes (δ13C and δ15N) of the main consumers (including ubiquitous CWC species) exhibiting different feeding strategies, zooplankton, suspended particulate organic matter (POM) and sedimented organic matter (SOM). Zooplankton and POM were collected 3 m above the coral colonies in order to assess their relative contributions to CWC diet. The δ15N of the scleractinians Desmophyllum dianthus, Madrepora oculata and Lophelia pertusa (8 to 9‰) and the gorgonian Paramuricea cf. macrospina (9 to 10‰) were consistent with a diet mainly composed of zooplankton (6 to 7‰). The antipatharian Leiopathes glaberrima was more 15N-depleted (7 to 8‰) than other cnidarians, suggesting a lower contribution of zooplankton to its diet. Our δ13C data clearly indicate that the benthic food web of SML is exclusively fuelled by carbon of phytoplanktonic origin. Nevertheless, consumers feeding at the water–sediment interface were more 13C-enriched than consumers feeding above the bottom (i.e. living corals and their epifauna). This pattern suggests that carbon is assimilated via 2 trophic pathways: relatively fresh phytoplanktonic production for 13C-depleted consumers and more decayed organic matter for 13C-enriched consumers. When the δ13C values of consumers were corrected for the influence of lipids (which are significantly 13C-depleted relative to other tissue components), our conclusions remained unchanged, except in the case of L. glaberrima which could assimilate a mixture of zooplankton and resuspended decayed organic matter. 13 pages |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) Programme européen HERMES; ANR DeepOases Programme européen HERMES ANR DeepOases ANR-06-BDIV-0005,DEEP OASES,Biodiversité des écosystèmes chimiosynthétiques dans l'océan profond(2006) |
format |
Article in Journal/Newspaper |
author |
Carlier, Antoine Le Guilloux, Erwan Olu, Karine Sarrazin, Jozée Mastrototaro, Francesco Taviani, Marco Clavier, Jacques |
author_facet |
Carlier, Antoine Le Guilloux, Erwan Olu, Karine Sarrazin, Jozée Mastrototaro, Francesco Taviani, Marco Clavier, Jacques |
author_sort |
Carlier, Antoine |
title |
Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) |
title_short |
Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) |
title_full |
Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) |
title_fullStr |
Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) |
title_full_unstemmed |
Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) |
title_sort |
trophic relationships in a deep mediterranean cold-water coral bank (santa maria di leuca, ionian sea) |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://doi.org/10.3354/meps08361 https://hal.univ-brest.fr/hal-00455423/file/m397p125.pdf https://hal.univ-brest.fr/hal-00455423 |
genre |
Lophelia pertusa |
genre_facet |
Lophelia pertusa |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2009, 397, pp.125-137. ⟨10.3354/meps08361⟩ |
op_relation |
hal-00455423 doi:10.3354/meps08361 10670/1.a98zg5 https://hal.univ-brest.fr/hal-00455423/file/m397p125.pdf https://hal.univ-brest.fr/hal-00455423 |
op_rights |
lic_creative-commons other |
op_doi |
https://doi.org/10.3354/meps08361 |
container_title |
Marine Ecology Progress Series |
container_volume |
397 |
container_start_page |
125 |
op_container_end_page |
137 |
_version_ |
1766064645522587648 |
spelling |
fttriple:oai:gotriple.eu:10670/1.a98zg5 2023-05-15T17:08:47+02:00 Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea) Carlier, Antoine Le Guilloux, Erwan Olu, Karine Sarrazin, Jozée Mastrototaro, Francesco Taviani, Marco Clavier, Jacques Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) Programme européen HERMES; ANR DeepOases Programme européen HERMES ANR DeepOases ANR-06-BDIV-0005,DEEP OASES,Biodiversité des écosystèmes chimiosynthétiques dans l'océan profond(2006) 2009-12-17 https://doi.org/10.3354/meps08361 https://hal.univ-brest.fr/hal-00455423/file/m397p125.pdf https://hal.univ-brest.fr/hal-00455423 en eng HAL CCSD Inter Research hal-00455423 doi:10.3354/meps08361 10670/1.a98zg5 https://hal.univ-brest.fr/hal-00455423/file/m397p125.pdf https://hal.univ-brest.fr/hal-00455423 lic_creative-commons other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2009, 397, pp.125-137. ⟨10.3354/meps08361⟩ Cold-water corals Benthic community Mediterranean Sea Food web Stable isotopes Zooplankton Particulate organic matter envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2009 fttriple https://doi.org/10.3354/meps08361 2023-01-22T17:24:38Z International audience Cold-water corals (CWC) are frequently reported from deep sites with locally accelerated currents that enhance seabed food particle supply. Moreover, zooplankton likely account for ecologically important prey items, but their contribution to CWC diet remains unquantified. We investigated the benthic food web structure of the recently discovered Santa Maria di Leuca (SML) CWC province (300 to 1100 m depth) located in the oligotrophic northern Ionian Sea. We analyzed stable isotopes (δ13C and δ15N) of the main consumers (including ubiquitous CWC species) exhibiting different feeding strategies, zooplankton, suspended particulate organic matter (POM) and sedimented organic matter (SOM). Zooplankton and POM were collected 3 m above the coral colonies in order to assess their relative contributions to CWC diet. The δ15N of the scleractinians Desmophyllum dianthus, Madrepora oculata and Lophelia pertusa (8 to 9‰) and the gorgonian Paramuricea cf. macrospina (9 to 10‰) were consistent with a diet mainly composed of zooplankton (6 to 7‰). The antipatharian Leiopathes glaberrima was more 15N-depleted (7 to 8‰) than other cnidarians, suggesting a lower contribution of zooplankton to its diet. Our δ13C data clearly indicate that the benthic food web of SML is exclusively fuelled by carbon of phytoplanktonic origin. Nevertheless, consumers feeding at the water–sediment interface were more 13C-enriched than consumers feeding above the bottom (i.e. living corals and their epifauna). This pattern suggests that carbon is assimilated via 2 trophic pathways: relatively fresh phytoplanktonic production for 13C-depleted consumers and more decayed organic matter for 13C-enriched consumers. When the δ13C values of consumers were corrected for the influence of lipids (which are significantly 13C-depleted relative to other tissue components), our conclusions remained unchanged, except in the case of L. glaberrima which could assimilate a mixture of zooplankton and resuspended decayed organic matter. 13 pages Article in Journal/Newspaper Lophelia pertusa Unknown Marine Ecology Progress Series 397 125 137 |