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Chapter 6 Combining Biomarker with Stable Isotope Analyses for Assessing the Transformation and Turnover of Soil Organic Matter

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Amelung, W., Brodowski, S., Sandhage-Hofmann, A., Bol, R.·2008·Advances in Agronomy

Abstract

Soil organic matter (SOM) consists of a vast range of biomolecules, but their individual contribution to the biogeochemical cycling of nutrients and CO2 release has eluded researchers. Here, we review the current knowledge on combining biomarker with stable isotope analyses for identifying the mechanisms and rates of SOM genesis and transformation. After an overview of the major biomarkers that are used for identifying decomposer communities and the origin of SOM far beyond microbial life cycles, we reexplain the principles and potentials of applying artificial and natural stable isotope labeling techniques in soil research. Major focus is finally laid on the quantitative evaluation of the published compound-specific stable isotope data of soils to characterize the niches and activity of soil microorganisms as well as their role in controlling the short-to long-term fate of SOM. Our literature research suggested that fungi appear to feed mainly on fresh plant material, whereas gram-positive bacteria also consume both fresh and older SOM. The newly synthesized structures have apparent mean residence time (MRT) of 1–80 years, while refractory plant-derived biomarkers may even dissipate faster. In no case did we find evidences for inert soil C. However, MRT was not constant but increased with increasing time after C3/C4 vegetation change. It is concluded that calculated MRTs from C3/C4 vegetation changes are currently underestimated, because,there is also a the formation of stable C4-derived C pools that did not reach steady-state equilibrium within few decades.

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Metadata

Authors
Amelung, W., Brodowski, S., Sandhage-Hofmann, A., & Bol, R.
Venue
Advances in Agronomy
Publisher
Elsevier
Published
2008
Pages
155-250
ISSN
0065-2113 (ISSN-L)
OpenAlex
W1581648025
Cited by
405
References
11
FWCI
33.93
Type
book chapter
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Chapter 6 Combining Biomarker with Stable Isotope Analyses for Assessing the Transformation and Turnover of Soil Organic Matter. https://app.cochat.ai/papers/10.1016/s0065-2113(08)00606-8
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Amelung, W., Brodowski, S., Sandhage-Hofmann, A., & Bol, R. (2008). Chapter 6 Combining Biomarker with Stable Isotope Analyses for Assessing the Transformation and Turnover of Soil Organic Matter. Advances in Agronomy. https://doi.org/10.1016/s0065-2113(08)00606-8

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