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| Titel |
Priming and substrate quality interactions in soil organic matter models |
| VerfasserIn |
T. Wutzler, M. Reichstein |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 3 ; Nr. 10, no. 3 (2013-03-26), S.2089-2103 |
| Datensatznummer |
250018173
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| Publikation (Nr.) |
 copernicus.org/bg-10-2089-2013.pdf |
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| Zusammenfassung |
| Interactions between different qualities of soil organic matter (SOM) affecting
their turnover are rarely represented in models.
In this study, we propose three mathematical strategies at different levels of
abstraction to represent those interactions. By implementing these strategies
into the Introductory Carbon Balance Model (ICBM) and applying them to several
scenarios of litter input, we show that the different levels of abstraction are
applicable at different timescales. We present a simple one-parameter equation
of substrate limitation that can straightforwardly be
implemented into other models of SOM dynamics at decadal timescale.
The study demonstrates how substrate quality interactions can explain
patterns of priming effects, accelerate turnover in FACE experiments, and the slowdown of decomposition in long-term bare
fallow experiments as an effect of energy limitation of microbial biomass.
The mechanisms of those interactions need to be further scrutinized empirically
for a more complete understanding. Overall, substrate quality interactions
contribute to both understanding and quantitatively modelling SOM
dynamics. |
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