Copepods Boost the Production but Reduce the Carbon Export Efficiency by Diatoms
| Autor: | Annick Masson, Richard S. Lampitt, Morten Hvitfeldt Iversen, Julia Boutorh, Beatriz Beker, Antti Jussi O. Evertsen, Manon Le Goff, Rudolph Corvaisier, Morgane Gallinari, Sarah L. C. Giering, Brivaëla Moriceau, Maria Stockenreiter, Marja Koski, Christina L. De La Rocha, Anne Donval, Christophe Lambert, Alain Le Mercier, Nathalie Coffineau, Herwig Stibor |
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| 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), Alfred Wegener Institute for Polar and Marine Research (AWI), Center for Marine Environmental Sciences [Bremen] (MARUM), Universität Bremen, Department of Biology [Trondheim] (IBI NTNU), Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU), National Oceanography Centre [Southampton] (NOC), University of Southampton, DTU Aqua, National Institute of Aquatic Resources, Technical University of Denmark [Lyngby] (DTU), Ludwig-Maximilians-Universität München (LMU), European Project: 264933,EC:FP7:ENV,FP7-ENV-2010,EURO-BASIN(2010), European Project: 261520,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2010-1,HYDRALAB IV(2010), 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), Danmarks Tekniske Universitet = Technical University of Denmark (DTU) |
| Rok vydání: | 2018 |
| Předmět: |
zooplankton
0106 biological sciences lcsh:QH1-199.5 010504 meteorology & atmospheric sciences marine snow Biological pump Ocean Engineering lcsh:General. Including nature conservation geographical distribution Aquatic Science Biogenic silica Oceanography 01 natural sciences Zooplankton Plankton commuity plankton community Phytoplankton Photic zone SDG 14 - Life Below Water 14. Life underwater biogenic silica lcsh:Science POC 0105 earth and related environmental sciences Water Science and Technology Marine snow [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Global and Planetary Change biology ACL 010604 marine biology & hydrobiology fungi Bay of Hopavågen Mesocosm biology.organism_classification mesocosm Diatom Environmental chemistry Bay of Hopavagen Environmental science lcsh:Q [SDE.BE]Environmental Sciences/Biodiversity and Ecology biological pump Copepod |
| Zdroj: | Frontiers in Marine Science Frontiers in Marine Science, Frontiers Media, 2018, 5, pp.UNSP 82. ⟨10.3389/fmars.2018.00082⟩ Moricea, B, Iversen, M H, Gallinar, M, Evertsen, A-J O, Le Goff, M, Beker, B, Boutorh, J, Corvaisier, R, Coffineau, N, Donval, A, Giering, S L C, Koski, M, Lambert, C, Lampit, R S, Le Mercier, A, Masson, A, Stibor, H, Stockenreiter, M & De La Rocha, C L 2018, ' Copepods boost the production but reduce the carbon export efficiency by diatoms ', Frontiers in Marine Science, vol. 5, 82 . https://doi.org/10.3389/fmars.2018.00082 Frontiers in Marine Science, Vol 5 (2018) Frontiers in Marine Science, 2018, 5, pp.UNSP 82. ⟨10.3389/fmars.2018.00082⟩ Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2018-03, Vol. 5, N. 82, P. 15p. |
| ISSN: | 2296-7745 |
| Popis: | The fraction of net primary production that is exported from the euphotic zone as sinking particulate organic carbon (POC) varies notably through time and from region to region. Phytoplankton containing biominerals, such as silicified diatoms have long been associated with high export fluxes. However, recent reviews point out that the magnitude of export is not controlled by diatoms alone, but determined by the whole plankton community structure. The combined effect of phytoplankton community composition and zooplankton abundance on export flux dynamics, were explored using a set of 12 large outdoor mesocosms. All mesocosms received a daily addition of minor amounts of nitrate and phosphate, while only 6 mesocosms received silicic acid (dSi). This resulted in a dominance of diatoms and dinoflagellate in the +Si mesocosms and a dominance of dinoflagellate in the −Si mesocosms. Simultaneously, half of the mesocosms had decreased mesozooplankton populations whereas the other half were supplemented with additional zooplankton. In all mesocosms, POC fluxes were positively correlated to Si/C ratios measured in the surface community and additions of dSi globally increased the export fluxes in all treatments highlighting the role of diatoms in C export. The presence of additional copepods resulted in higher standing stocks of POC, most probably through trophic cascades. However it only resulted in higher export fluxes for the −Si mesocosms. In the +Si with copepod addition (+Si +Cops) export was dominated by large diatoms with higher Si/C ratios in sinking material than in standing stocks. During non-bloom situations, the grazing activity of copepods decrease the export efficiency in diatom dominated systems by changing the structure of the phytoplankton community and/or preventing their aggregation. However, in flagellate-dominated system, the copepods increased phytoplankton growth, aggregation and fecal pellet production, with overall higher net export not always visible in term of export efficiency. Copyright © 2018 Moriceau, Iversen, Gallinari, Evertsen, Le Goff, Beker, Boutorh, Corvaisier, Coffineau, Donval, Giering, Koski, Lambert, Lampitt, Le Mercier, Masson, Stibor, Stockenreiter and De La Rocha. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
| Databáze: | OpenAIRE |
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