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Emerging understanding of the ecosystem silica filter

Struyf, Eric and Conley, Daniel LU (2012) In Biogeochemistry 107(1-3). p.9-18
Abstract
The annual fixation of dissolved Si (DSi) into terrestrial vegetation has been estimated to range from 60 to 200 Tmole, or 10-40 times more than the yearly export of DSi and biogenic Si (BSi) from the terrestrial geobiosphere to the coastal zone. Ecosystems form a large filter between primary mobilization of DSi from silicate weathering and its eventual export to the oceans, and a large reservoir of BSi accumulates in aquatic and terrestrial ecosystems. Although a number of synthesis activities within the last decade have discussed biological transformations in the terrestrial Si cycle, the timescales at which BSi is stored and recycled within ecosystems, BSi persistence and reactivity throughout soil profiles, the dependence of the BSi... (More)
The annual fixation of dissolved Si (DSi) into terrestrial vegetation has been estimated to range from 60 to 200 Tmole, or 10-40 times more than the yearly export of DSi and biogenic Si (BSi) from the terrestrial geobiosphere to the coastal zone. Ecosystems form a large filter between primary mobilization of DSi from silicate weathering and its eventual export to the oceans, and a large reservoir of BSi accumulates in aquatic and terrestrial ecosystems. Although a number of synthesis activities within the last decade have discussed biological transformations in the terrestrial Si cycle, the timescales at which BSi is stored and recycled within ecosystems, BSi persistence and reactivity throughout soil profiles, the dependence of the BSi storage and recycling on ecological processes, the feedbacks to hydrology, the interaction with man's activities and ultimately the global relevance in Si budgets are poorly constrained. Here we discuss 5 key controls on the ability of ecosystems to filter and control the export of DSi: ecosystem biodiversity, BSi dissolution rates and reactivity, hydrology, interaction with the geosphere and anthropogenic impacts. These controls need to be further studied to better quantify the global and local importance of the terrestrial biogeochemical Si cycle and specifically the BSi reservoir in ecosystems. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biogenic silica, Ecosystems, Biodiversity, Nutrient cycling, Hydrology, Reactivity, Weathering, Anthropogenic influences
in
Biogeochemistry
volume
107
issue
1-3
pages
9 - 18
publisher
Springer
external identifiers
  • wos:000298226700002
  • scopus:83555177625
ISSN
1573-515X
DOI
10.1007/s10533-011-9590-2
project
BECC
language
English
LU publication?
yes
id
dc00d25d-e4ea-4675-9a7a-9104bfd1232b (old id 2348857)
date added to LUP
2012-02-24 09:46:19
date last changed
2017-11-12 03:17:10
@article{dc00d25d-e4ea-4675-9a7a-9104bfd1232b,
  abstract     = {The annual fixation of dissolved Si (DSi) into terrestrial vegetation has been estimated to range from 60 to 200 Tmole, or 10-40 times more than the yearly export of DSi and biogenic Si (BSi) from the terrestrial geobiosphere to the coastal zone. Ecosystems form a large filter between primary mobilization of DSi from silicate weathering and its eventual export to the oceans, and a large reservoir of BSi accumulates in aquatic and terrestrial ecosystems. Although a number of synthesis activities within the last decade have discussed biological transformations in the terrestrial Si cycle, the timescales at which BSi is stored and recycled within ecosystems, BSi persistence and reactivity throughout soil profiles, the dependence of the BSi storage and recycling on ecological processes, the feedbacks to hydrology, the interaction with man's activities and ultimately the global relevance in Si budgets are poorly constrained. Here we discuss 5 key controls on the ability of ecosystems to filter and control the export of DSi: ecosystem biodiversity, BSi dissolution rates and reactivity, hydrology, interaction with the geosphere and anthropogenic impacts. These controls need to be further studied to better quantify the global and local importance of the terrestrial biogeochemical Si cycle and specifically the BSi reservoir in ecosystems.},
  author       = {Struyf, Eric and Conley, Daniel},
  issn         = {1573-515X},
  keyword      = {Biogenic silica,Ecosystems,Biodiversity,Nutrient cycling,Hydrology,Reactivity,Weathering,Anthropogenic influences},
  language     = {eng},
  number       = {1-3},
  pages        = {9--18},
  publisher    = {Springer},
  series       = {Biogeochemistry},
  title        = {Emerging understanding of the ecosystem silica filter},
  url          = {http://dx.doi.org/10.1007/s10533-011-9590-2},
  volume       = {107},
  year         = {2012},
}