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Anthropogenic perturbations of the silicon cycle at the global scale: Key role of the land‐ocean transition
Author(s) -
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.,
Ní Longphuirt S.,
Loucaides S.,
Papush L.,
Presti M.,
Ragueneau O.,
Regnier P.,
Saccone L.,
Slomp C. P.,
Spiteri C.,
Van Cappellen P.
Publication year - 2009
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2008gb003267
Subject(s) - biogeochemical cycle , environmental science , photic zone , silicate , earth science , global change , oceanography , biogeochemistry , nutrient , ecosystem , terrestrial ecosystem , cycling , geology , environmental chemistry , ecology , climate change , phytoplankton , chemistry , geography , organic chemistry , biology , archaeology
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.