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Anthropogenic perturbations of the silicon cycle at the global scale: Key role of the land-ocean transition
Laruelle, G. G.; Roubeix, V.; Sferratore, A.; Brodherr, B.; Ciuffa, D.; Conley, D. J.; Dürr, H. H.; Garnier, J.; Lancelot, C.; Le Thi Phuong, Q.; Meunier, J.-D.; Meybeck, M.; Michalopoulos, P.; Moriceau, B.; Longphuirt, S. Ni.; Loucaides, S.; Papush, L.; Presti, M.; Ragueneau, O.; Regnier, P.; Saccone, L.; Slomp, C. P.; Spiteri, C.; Van Cappellen, P. (2009). Anthropogenic perturbations of the silicon cycle at the global scale: Key role of the land-ocean transition. Global Biogeochem. Cycles 23(GB4031): 17 pp. dx.doi.org/10.1029/2008GB003267
In: Global Biogeochemical Cycles. American Geophysical Union: Washington, DC. ISSN 0886-6236; e-ISSN 1944-9224, meer
Peer reviewed article  
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  • Laruelle, G. G., meer
  • Roubeix, V., meer
  • Sferratore, A.
  • Brodherr, B.
  • Ciuffa, D.
  • Conley, D. J.
  • Dürr, H. H., meer
  • Garnier, J.
  • Lancelot, C., meer
  • Le Thi Phuong, Q.
  • Meunier, J.-D.
  • Meybeck, M.
  • Michalopoulos, P.
  • Moriceau, B.
  • Longphuirt, S. Ni.
  • Loucaides, S.
  • Papush, L.
  • Presti, M.
  • Ragueneau, O.
  • Regnier, P., meer
  • Saccone, L.
  • Slomp, C. P.
  • Spiteri, C.
  • Van Cappellen, P.
Abstract
    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 (bSiO2). 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 bSiO2. 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 bSiO2 in the coastal zone are to be expected over the course of this century.
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