Assumptions and model structure for the growth and survival of the holopelagic brown macroalga Sargassum spp. based on DEB (Dynamic Energy Budget) theory

Understanding and forecasting the proliferation of holopelagic Sargassum in the tropical Atlantic Ocean requires knowledge on the biology and transport of these macroalgae. Forecasting the biomass, proliferation and distribution of Sargassum rafts at time scales greater than a few weeks needs improv...

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Main Authors: Lagunes, María, José, Pecquerie, Laure, Lett, Christophe, Benavides, Mar, Cecchi, Philippe, Changeux, Thomas, Connan, Solène, Duarte-Neto, Paulo, Jouanno, Julien, Klein, Judith, Lavaud, Romain, Le Loc'H, François, Frédou, Flavia, Lucena, Michotey, Valérie, Munaron, Jean, Marie, Freile-Pelegrín, Yolanda, Poggiale, Jean, Christophe, Robledo, Daniel, Stiger, Valérie, Stosic, Borko, Thibaut, Thierry, Vásquez-Elizondo, Román, M, Berline, Léo
Other Authors: Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), 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), MARine Biodiversity Exploitation and Conservation - MARBEC (UMR MARBEC ), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Universidade Federal Rural de Pernambuco (UFRPE), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Solène Connan, Philippe Potin, ANR-22-SARG-0003,BIOMAS,Approche Bioenergétique pour le Modélisation des Sargasses(2022)
Format: Conference Object
Language:English
Published: HAL CCSD 2023
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Online Access:https://hal.science/hal-04181607
https://hal.science/hal-04181607/document
https://hal.science/hal-04181607/file/Lagunesetal_POSTER_AssumptionsandmodelstructureSargassumDEBTheory.pdf
Description
Summary:Understanding and forecasting the proliferation of holopelagic Sargassum in the tropical Atlantic Ocean requires knowledge on the biology and transport of these macroalgae. Forecasting the biomass, proliferation and distribution of Sargassum rafts at time scales greater than a few weeks needs improved modeling. Recent modeling efforts focused mostly on transport and less on the biology of Sargassum. Three morphotypes in varying proportions compose these Sargassum rafts. Better understanding and modeling the specificities of each of the three morphotypes is the current challenge.The main objectives of the BIOMAS project (BIOenergetic Modeling Approach for Sargassum dynamics) are to acquire the necessary knowledge to build an individual morphotype based model of Sargassum growth, to include this model into a drift model, and finally perform simulations of the integrated drift-growth model in order to forecast Sargassum morphotypes proliferation at seasonal scale. A strong synergy between laboratory experiments and modeling will allow us to build the first DEB (Dynamic Energy Budget) model applied to Sargassum and apply it to the three morphotypes. In-situ monitoring of Sargassum morphotypes in the Western and Eastern Atlantic will allow us to validate the integrated model.We here focus on the description of the assumptions and structure of the DEB model for Sargassum growth and survival. Specific assumptions to differentiate each morphotype are discussed and model simulation will be used to contribute to the design of optimal protocols for experiments so that the parameters are accurately estimated.