Cited by 114Soil Carbon and Nitrogen DynamicsSoil erosion and sediment transportIsotope Analysis in Ecology

Computing the mean residence time of soil carbon fractions using stable isotopes: impacts of the model framework

Derrien, D., Amelung, W.·2011·European Journal of Soil Science

Abstract

Soils contain the largest carbon (C) reservoir on Earth, but the mean residence time (MRT) of soil C is often poorly estimated, despite its importance for assessing the efficiency with which soils may serve as a sink for atmospheric C. The objective of this study was to evaluate how the structure of simple models of soil C dynamics affects the MRT determined from isotope‐mixing experiments, using data from field studies with either artificial labelling (FACE) or C3/C4 vegetation change. We first highlighted theoretically how non‐steady‐state conditions and the model structure (one single, two successive, or two parallel C pools) can have an impact on the MRT assessment. We then tested these different model structures against published data on the dynamics of different soil organic matter separates and their constituents. Our findings indicated that many of the reviewed studies assumed wrongly that the system was at steady state or could be described by a single‐pool approach. To select the correct model, exact knowledge of C input rates and several data points are needed from the beginning of the experiment. For steady‐state conditions an apparent temporal change of MRT computed from a single‐pool model is thus a clear indicator that a two‐pool approach must be chosen. The errors made by the wrong choice of model varied with the length of the experiment and usually resulted in an over‐estimate of MRT by a factor of 1.15 for some data published on physical size separates, but by a factor of up to 11 for individual microbial biomarkers such as muramic acid.

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Crossref · 10.1111/j.1365-2389.2010.01333.x

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Authors
Derrien, D., & Amelung, W.
Affiliations
  • Institut National de la Recherche Agronomique (FR)
  • University of Bonn (DE)
Corresponding author
Derrien, D.
Venue
European Journal of Soil Science
Publisher
Wiley
Published
2011-01-19
Volume
62
Issue
2
Pages
237-252
ISSN
  • 1351-0754 (ISSN-L)
  • 1365-2389
OpenAlex
W1966893966
Cited by
114
References
45
Citations by year
2026: 1 · 2025: 8 · 2024: 6 · 2023: 14 · 2022: 8 · 2021: 9 · 2020: 10 · 2019: 9 · 2018: 9 · 2017: 11 · 2016: 5 · 2015: 5 · 2014: 5 · 2013: 6 · 2012: 5
FWCI
9.46
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Soil Science (publishedVersion)
  • HAL (submittedVersion)
Funders
Agence Nationale de la Recherche (ANR-07-BLAN-0222)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
  • Physical Sciences › Environmental Science › Ecology › Isotope Analysis in Ecology
Keywords
mean residence time, soil organic carbon dynamics, carbon pools, model structure, steady-state assumption, soil organic matter fractions, free-air CO2 enrichment, microbial biomarkers, muramic acid, soil carbon sink

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