High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes
WOS:000441489600006 International audience There has been an upsurge of interest in trait-based approaches to zooplankton, modelling the seasonal changes in the feeding modes of zooplankton in relation to phytoplankton traits such as size or motility. We examined this link at two English Channel pla...
Published in: | Progress in Oceanography |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.science/hal-02619265 https://hal.science/hal-02619265/document https://hal.science/hal-02619265/file/Djeghri_etal_PiO_2018.pdf https://doi.org/10.1016/j.pocean.2018.04.013 |
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ftunivbrest:oai:HAL:hal-02619265v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
ACL Feeding community calanus-finmarchicus Copepod acartia-clausi centropages-typicus ecological research egg-production food selectivity Intraguild predation marine planktonic copepod oithona-similis Predator-prey size ratio Selectivity Sloppy feeding Western Channel Observatory Zooplankton biomass helgolandicus [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
ACL Feeding community calanus-finmarchicus Copepod acartia-clausi centropages-typicus ecological research egg-production food selectivity Intraguild predation marine planktonic copepod oithona-similis Predator-prey size ratio Selectivity Sloppy feeding Western Channel Observatory Zooplankton biomass helgolandicus [SDE.BE]Environmental Sciences/Biodiversity and Ecology Djeghri, Nicolas Atkinson, Angus Fileman, Elaine S. Harmer, Rachel A. Widdicombe, Claire E. Mcevoy, Andrea J. Cornwell, Louise Mayor, Daniel J. High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes |
topic_facet |
ACL Feeding community calanus-finmarchicus Copepod acartia-clausi centropages-typicus ecological research egg-production food selectivity Intraguild predation marine planktonic copepod oithona-similis Predator-prey size ratio Selectivity Sloppy feeding Western Channel Observatory Zooplankton biomass helgolandicus [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
WOS:000441489600006 International audience There has been an upsurge of interest in trait-based approaches to zooplankton, modelling the seasonal changes in the feeding modes of zooplankton in relation to phytoplankton traits such as size or motility. We examined this link at two English Channel plankton monitoring sites south of Plymouth (L4 and El). At L4 there was a general transition from diatoms in spring to motile microplankton in summer and autumn, but this was not mirrored in the succession of copepod feeding traits; for example the ambushing Oithona similis dominated during the spring diatom bloom. At nearby El we measured seasonality of food and grazers, finding strong variation between 2014 and 2015 but overall low mesozooplankton biomass (median 4.5 mg C m(-3)). We also made a seasonal grazing study of five copepods with contrasting feeding modes (Calculus helgolandicus, Centropages typicus, Acartia clausi, Pseudocalanus elongatus and Oithona similis), counting the larger prey items from the natural seston. All species of copepod fed on all food types and differences between their diets were only subtle; the overriding driver of diet was the composition of the prey field. Even the smaller copepods fed on copepod nauplii at significant rates, supporting previous suggestions of the importance of intra-guild predation. All copepods, including O. similis, were capable of tackling extremely long ( \textgreater 500 mu m) diatom chains at clearance rates comparable to those on ciliates. Maximum observed prey:predator length ratios ranged from 0.12 (C. helgolandicus) up to 0.52 (O. similis). Unselective feeding behaviour and the ability to remove highly elongated cells have implications for how copepod feeding is represented in ecological and biogeochemical models. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-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)-Centre National de la Recherche Scientifique (CNRS) Plymouth Marine Laboratory (PML) Universität Hamburg (UHH) National Oceanography Centre Southampton (NOC) University of Southampton |
format |
Article in Journal/Newspaper |
author |
Djeghri, Nicolas Atkinson, Angus Fileman, Elaine S. Harmer, Rachel A. Widdicombe, Claire E. Mcevoy, Andrea J. Cornwell, Louise Mayor, Daniel J. |
author_facet |
Djeghri, Nicolas Atkinson, Angus Fileman, Elaine S. Harmer, Rachel A. Widdicombe, Claire E. Mcevoy, Andrea J. Cornwell, Louise Mayor, Daniel J. |
author_sort |
Djeghri, Nicolas |
title |
High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes |
title_short |
High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes |
title_full |
High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes |
title_fullStr |
High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes |
title_full_unstemmed |
High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes |
title_sort |
high prey-predator size ratios and unselective feeding in copepods: a seasonal comparison of five species with contrasting feeding modes |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02619265 https://hal.science/hal-02619265/document https://hal.science/hal-02619265/file/Djeghri_etal_PiO_2018.pdf https://doi.org/10.1016/j.pocean.2018.04.013 |
genre |
Calanus finmarchicus Copepods |
genre_facet |
Calanus finmarchicus Copepods |
op_source |
ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-02619265 Progress in Oceanography, 2018, 165, pp.63-74. ⟨10.1016/j.pocean.2018.04.013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2018.04.013 hal-02619265 https://hal.science/hal-02619265 https://hal.science/hal-02619265/document https://hal.science/hal-02619265/file/Djeghri_etal_PiO_2018.pdf doi:10.1016/j.pocean.2018.04.013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2018.04.013 |
container_title |
Progress in Oceanography |
container_volume |
165 |
container_start_page |
63 |
op_container_end_page |
74 |
_version_ |
1790598695376388096 |
spelling |
ftunivbrest:oai:HAL:hal-02619265v1 2024-02-11T10:02:39+01:00 High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes Djeghri, Nicolas Atkinson, Angus Fileman, Elaine S. Harmer, Rachel A. Widdicombe, Claire E. Mcevoy, Andrea J. Cornwell, Louise Mayor, Daniel J. Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-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)-Centre National de la Recherche Scientifique (CNRS) Plymouth Marine Laboratory (PML) Universität Hamburg (UHH) National Oceanography Centre Southampton (NOC) University of Southampton 2018 https://hal.science/hal-02619265 https://hal.science/hal-02619265/document https://hal.science/hal-02619265/file/Djeghri_etal_PiO_2018.pdf https://doi.org/10.1016/j.pocean.2018.04.013 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2018.04.013 hal-02619265 https://hal.science/hal-02619265 https://hal.science/hal-02619265/document https://hal.science/hal-02619265/file/Djeghri_etal_PiO_2018.pdf doi:10.1016/j.pocean.2018.04.013 info:eu-repo/semantics/OpenAccess ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-02619265 Progress in Oceanography, 2018, 165, pp.63-74. ⟨10.1016/j.pocean.2018.04.013⟩ ACL Feeding community calanus-finmarchicus Copepod acartia-clausi centropages-typicus ecological research egg-production food selectivity Intraguild predation marine planktonic copepod oithona-similis Predator-prey size ratio Selectivity Sloppy feeding Western Channel Observatory Zooplankton biomass helgolandicus [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2018 ftunivbrest https://doi.org/10.1016/j.pocean.2018.04.013 2024-01-23T23:39:59Z WOS:000441489600006 International audience There has been an upsurge of interest in trait-based approaches to zooplankton, modelling the seasonal changes in the feeding modes of zooplankton in relation to phytoplankton traits such as size or motility. We examined this link at two English Channel plankton monitoring sites south of Plymouth (L4 and El). At L4 there was a general transition from diatoms in spring to motile microplankton in summer and autumn, but this was not mirrored in the succession of copepod feeding traits; for example the ambushing Oithona similis dominated during the spring diatom bloom. At nearby El we measured seasonality of food and grazers, finding strong variation between 2014 and 2015 but overall low mesozooplankton biomass (median 4.5 mg C m(-3)). We also made a seasonal grazing study of five copepods with contrasting feeding modes (Calculus helgolandicus, Centropages typicus, Acartia clausi, Pseudocalanus elongatus and Oithona similis), counting the larger prey items from the natural seston. All species of copepod fed on all food types and differences between their diets were only subtle; the overriding driver of diet was the composition of the prey field. Even the smaller copepods fed on copepod nauplii at significant rates, supporting previous suggestions of the importance of intra-guild predation. All copepods, including O. similis, were capable of tackling extremely long ( \textgreater 500 mu m) diatom chains at clearance rates comparable to those on ciliates. Maximum observed prey:predator length ratios ranged from 0.12 (C. helgolandicus) up to 0.52 (O. similis). Unselective feeding behaviour and the ability to remove highly elongated cells have implications for how copepod feeding is represented in ecological and biogeochemical models. Article in Journal/Newspaper Calanus finmarchicus Copepods Université de Bretagne Occidentale: HAL Progress in Oceanography 165 63 74 |