Calcitic nanofibers in soils and caves : a putative fungal contribution to carbonatogenesis

Details

Serval ID
serval:BIB_E5B30E25267F
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Calcitic nanofibers in soils and caves : a putative fungal contribution to carbonatogenesis
Journal
Geological Society of London, Special Publications
Author(s)
Bindschedler S., Millière L., Cailleau G., Job D., Verrecchia E.P.
ISSN
0305-8719
Publication state
Published
Issued date
2010
Peer-reviewed
Oui
Volume
336
Pages
225-238
Language
english
Notes
Tufas and Speleothems: Unravelling the Microbial and Physical Controls H. M. PEDLEY and M. ROGERSON University of Hull, UK
Abstract
The origin of soil mineralized nanofibres remains controversial. It is attributed to either biogenic factors or physicochemical processes. Scanning electron microscope and transmission electron microscope observations show that nanofibres could originate from the breakdown of fungal hyphae, especially its cell wall. It is hypothesized that during the decay of organic matter, cell wall microfibrils are released in the soil where they are exposed to mineralizing pore fluids, leading to their calcitic pseudomorphosis and/or are used as a template for calcite precipitation. When associated with needle fibre calcite bundles, nanofibres could indicate the relict of an organic sheath in which calcite has precipitated. This paper emphasizes the important roles of both organic matter and fungi in carbonatogenesis, and consequently in the soil carbon cycle.
Create date
10/12/2009 14:53
Last modification date
20/08/2019 16:09
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