Anthropogenic perturbations of the silicon cycle at the global scale: Key role of the land-ocean transition

• Published in: Global Biogeochemical Cycles
• Main Authors: Laruelle, Goulven G., Roubeix, Vincent, Sferratore, Agata, Brodherr, B., Ciuffa, D., Conley, D.J., Durr, H. H., Garnier, Josette, Lancelot, Christiane, Phuong, Q. Le Thi, Meunier, Jean-Dominique, Meybeck, Michel, Michalopoulos, Panagiotis, Moriceau, Brivaëla, Ni Longphuirt, Sorcha, Loucaides, Socratis, Papush, Loredana, Presti, M., Ragueneau, Olivier, Régnier, Pierre, Saccone, L., Slomp, C. P., Spiteri, C., van Cappellen, Philippe
• Other Authors: Faculty of Geosciences, UCEL, Universiteit Utrecht / Utrecht University Utrecht, Aquatic Systems Ecology, Université libre de Bruxelles (ULB), Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Department Marine Biology, Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Department of Biology, University of Roma Tor Vegata, Geobiosphere Centre, Department of Geology, Skane University Hospital Lund, Université Pierre et Marie Curie - Paris 6 (UPMC), Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Hellenic Centre for Marine Research (HCMR), 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), National Oceanography Centre Southampton (NOC), University of Southampton, Department of thematic studies Water and environmental studies, Linköping University (LIU), Department of Earth Sciences - Geochemistry Utrecht, Department of Marine Ecology Silkeborg, National Environmental Research Institute Danmark (NERI), School of Earth and Atmospheric Sciences Atlanta, Georgia Institute of Technology Atlanta, European Project:
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2009
• Subjects: BROOK EXPERIMENTAL FOREST; BIOGENIC-SILICA; BIOGEOCHEMICAL CYCLES; DISSOLVED SILICATE; EARLY DIAGENESIS; SOUTHERN-OCEAN; WORLD OCEAN; DEEP-SEA; HYDROLOGICAL ALTERATIONS; BENTHIC FLUXES; [SDE]Environmental Sciences; Southern Ocean
• Online Access: https://hal.science/hal-01071335; https://hal.science/hal-01071335/document; https://hal.science/hal-01071335/file/Laruelle_et_allSi-web_2009_GBC.pdf; https://doi.org/10.1029/2008GB003267

International audience Silicon (Si), in the form of dissolved silicate (DSi), is a key nutrient in marine and continental ecosystems. DSi is taken up by organisms to produce structural elements (e.g., shells and phytoliths) composed of amorphous biogenic silica (bSiO(2)). A global mass balance model of the biologically active part of the modern Si cycle is derived on the basis of a systematic review of existing data regarding terrestrial and oceanic production fluxes, reservoir sizes, and residence times for DSi and bSiO(2). The model demonstrates the high sensitivity of biogeochemical Si cycling in the coastal zone to anthropogenic pressures, such as river damming and global temperature rise. As a result, further significant changes in the production and recycling of bSiO(2) in the coastal zone are to be expected over the course of this century.