Publication
Title
An enormous amorphous silica stock in boreal wetlands
Author
Abstract
We investigated amorphous Si (ASi) in a boreal wetland in northern Sweden. We found enormous stocks of ASi in the upper soil layers (up to 11% of dry weight), in the form of diatom frustules and plant ASi. A consistent exponential decrease in ASi concentrations was observed with increasing depth in the soil profile. An inverse modeling approach shows that vegetation takes up a substantial part of weathered dissolved Si (DSi). Concurrent analysis of N and C indicates a faster turnover in and a higher leakage from the ASi pool. The magnitude of the biological buffering we observed is unprecedented and supports the emerging paradigm of the importance of biological uptake of DSi governing the export of DSi from terrestrial ecosystems. Our results complicate current models of silicate transport, highlighting the necessity to incorporate ecosystem biological buffering in our concept of Si biogeochemistry.`
Language
English
Source (journal)
Journal of geophysical research / American Geophysical Union [Washington, D.C.] - Richmond, Va, 1949 - 2012
Publication
Richmond, Va : 2010
ISSN
0148-0227 [print]
2156-2202 [online]
0022-1406 [cancelled]
0196-6928 [cancelled]
0196-6936 [cancelled]
0885-3401 [cancelled]
8755-8556 [cancelled]
0196-2256 [cancelled]
0747-7309 [cancelled]
1934-8592 [cancelled]
1934-8843 [cancelled]
Volume/pages
115(2010), p. G04008,1-G04008,8
ISI
000285009700005
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 19.10.2010
Last edited 19.09.2017
To cite this reference