Title
Silicon pools in human impacted soils of temperate zones Silicon pools in human impacted soils of temperate zones
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Washington, D.C. ,
Subject
Physics
Chemistry
Biology
Source (journal)
Global biogeochemical cycles. - Washington, D.C.
Volume/pages
29(2015) :9 , p. 1439-1450
ISSN
0886-6236
ISI
000363703800007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Besides well-known effects of climate and parent material on silicate weathering the role of land use change as a driver in the global silicon cycle is not well known. Changes in vegetation cover have altered reservoirs of silicon and carbon in plants and soils. This has potential consequences for plant-Si availability, agricultural yields, and coastal eutrophication, as Si is a beneficial element for many crop plants and an essential nutrient for diatom growth. We here examined the role of sustained and intensive land use and human disturbance on silicon (Si) pool distribution in soils with similar climatological and bulk mineralogical characteristics. We show that land use impacts both biogenic and nonbiogenic Si pools. While biogenic Si strongly decreases along the land use change gradient (from forest to croplands), pedogenic silica fractions (e.g. pedogenic clays) increase in topsoils with a long duration of cultivation and soil disturbance. Our results suggest that nonbiogenic Si pools might compensate for the loss of reactive biogenic silicon in temperate zones.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/a49916/128051.pdf
E-info
https://repository.uantwerpen.be/docman/iruaauth/133c44/128051.pdf
https://repository.uantwerpen.be/docman/iruaauth/1b1500/128051.pdf
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