A mathematical modelling of bloom of the coccolithophore <i>Emiliania huxleyi</i> in a mesocosm experiment
- Others:
- Oceanology Laboratory ; Interfacultary Centre for Marine Research
- Unité d'Océanographie Chimique ; Interfacultary Center for Marine Research (MARE) ; Université de Liège-Université de Liège
- Centre for Estuarine and Marine Ecology ; Centre for Estuarine and Marine Ecology
- Laboratoire d'Oceanographie Chimique et Geochimie des Eaux ; Université libre de Bruxelles (ULB)
- Department of Bentho-pelagic processes ; Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI)
- Géoazur (GEOAZUR 6526) ; Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
- Leibniz Institute of Marine Science at the University of Kiel (IFM-GEOMAR) ; Kiel University
Description
A dynamic model has been developed to represent biogeochemical variables and processes observed during a bloom of Emiliania huxleyi coccolithophore. This bloom was induced in a mesocosm experiment during which the ecosystem development was followed over a period of 23-days through changes in various biogeochemical parameters such as inorganic nutrients (nitrate, ammonium and phosphate), total alkalinity (TA), dissolved inorganic carbon (DIC), partial pressure of CO2 (pCO2), dissolved oxygen (O2), photosynthetic pigments, particulate organic carbon (POC), dissolved organic carbon (DOC), Transparent Exopolymer Particles (TEP), primary production, and calcification. This dynamic model is based on unbalanced algal growth and balanced bacterial growth. In order to adequately reproduce the observations, the model includes an explicit description of phosphorus cycling, calcification, TEP production and an enhanced mortality due to viral lysis. The model represented carbon, nitrogen and phosphorus fluxes observed in the mesocosms. Modelled profiles of algal biomass and final concentrations of DIC and nutrients are in agreement with the experimental observations.
Abstract
International audience
Additional details
- URL
- https://hal.archives-ouvertes.fr/hal-00330287
- URN
- urn:oai:HAL:hal-00330287v1
- Origin repository
- UNICA