High prey-predator size ratios and unselective feeding in copepods: A seasonal comparison of five species with contrasting feeding modes

Autor: Elaine S. Fileman, Louise Cornwell, Angus Atkinson, Rachel A. Harmer, Claire E. Widdicombe, Daniel J. Mayor, Nicolas Djeghri, Andrea J. McEvoy
Přispěvatelé: 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 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), Plymouth Marine Laboratory, Universität Hamburg (UHH), National Oceanography Centre [Southampton] (NOC), University of Southampton, 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)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
Intraguild predation
010504 meteorology & atmospheric sciences
Predator-prey size ratio
Zoology
Aquatic Science
marine planktonic copepod
Zooplankton
Acartia clausi
01 natural sciences
Predation
calanus-finmarchicus
acartia-clausi
Zooplankton biomass
Phytoplankton
helgolandicus
oithona-similis
Selectivity
Sloppy feeding
14. Life underwater
calanus-helgolandicus
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
0105 earth and related environmental sciences
Biomass (ecology)
biology
010604 marine biology & hydrobiology
ACL
Feeding
Western Channel Observatory
Seston
fungi
food selectivity
Geology
biology.organism_classification
Copepod
centropages-typicus
spring bloom
ecological research
Oceanography
Diatom
community
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
human activities
egg-production
[SDV.EE.IEO]Life Sciences [q-bio]/Ecology
environment/Symbiosis
Zdroj: Progress in Oceanography
Progress in Oceanography, Elsevier, 2018, 165, pp.63-74. ⟨10.1016/j.pocean.2018.04.013⟩
Progress in Oceanography, Elsevier, 2019, 177, pp.102039. ⟨10.1016/j.pocean.2018.11.005⟩
Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2019-10, Vol. 177, P. 102039 (12p.)
Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2018-07, Vol. 165, P. 63-74
Progress in Oceanography, 2019, 177, pp.102039. ⟨10.1016/j.pocean.2018.11.005⟩
Progress in Oceanography, 2018, 165, pp.63-74. ⟨10.1016/j.pocean.2018.04.013⟩
ISSN: 0004-4148
0079-6611
DOI: 10.1016/j.pocean.2018.04.013⟩
Popis: 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.
Databáze: OpenAIRE
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