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Plankton dynamics in an estuarine plume: A mesocosm 13C and 15N tracer study

Van den Meersche Karel, Soetaert Karline, Middelburg Jack J.. 2011. Plankton dynamics in an estuarine plume: A mesocosm 13C and 15N tracer study. Marine Ecology. Progress Series, 429 : pp. 29-43.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : MARINE & FRESHWATER BIOLOGY / Quartile : Q1, Sujet : OCEANOGRAPHY / Quartile : Q2, Sujet : ECOLOGY

Abstract : Flows of carbon and nitrogen in a natural phytoplankton assemblage from the plume of the Scheldt estuary were followed during and after a light-induced bloom by measuring changes in concentrations and stable isotope ratios in mesocosms after addition of 13C (as bicarbonate or glucose) and 15N (as ammonium or nitrate). Addition of 13C-bicarbonate showed a strong coupling between algal primary production and bacterial secondary production, while addition of 13C-glucose revealed bacteria as a carbon source for eukaryotes. Tracing the 13C into mesozooplankton, we identified selective grazing on algae during the phytoplankton bloom, transfer of carbon from bacteria to mesozooplankton and opportunistic feeding strategies after the bloom. Nitrogen labeling confirmed carbon labeling findings, identified bacteria rather than mesozooplankton as ammonium regenerators and allowed quantification of nitrification. (Résumé d'auteur)

Mots-clés Agrovoc : Zooplancton, Croissance, Isotope, Écosystème, Carbone, Azote, Lumière, Estuaire, Bacteria, Composé organophosphoré, Filtration, Substance nutritive

Mots-clés géographiques Agrovoc : Pays-Bas

Classification Agris : M01 - Fisheries and aquaculture - General aspects
L51 - Animal physiology - Nutrition

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

  • Van den Meersche Karel, CIRAD-PERSYST-UMR Eco&Sols (CRI) ORCID: 0000-0002-0866-7657
  • Soetaert Karline, Netherlands Institute of Ecology (NLD)
  • Middelburg Jack J., Netherlands Institute of Ecology (NLD)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/575064/)

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