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Anthropogenic perturbations of the silicon cycle at the global scale: Key role of the land-ocean transition
University Utrecht, Fac Geosci, Department Earth Science Geochem, NL-3508 TA Utrecht, Netherlands .
University Paris 06, UMR 7619, CNRS, F-75005 Paris, France .
Leibniz Institute Balt Sea Research, Department Marine Biol, D-18119 Rostock, Germany .
University Roma Tor Vergata, Department Biol, Centre Research and Monitoring Marine Environm, I-00133 Rome, Italy .
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2009 (English)In: Global Biogeochemical Cycles, ISSN 0886-6236, Vol. 23Article, review/survey (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2009. Vol. 23
National Category
Social Sciences
URN: urn:nbn:se:liu:diva-53058DOI: 10.1029/2008GB003267OAI: diva2:286645
Available from: 2010-01-15 Created: 2010-01-15 Last updated: 2010-01-15

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Papush, Liana
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Department of Water and Environmental StudiesFaculty of Arts and Sciences
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