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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 8
Biogeosciences, 12, 2471–2487, 2015
https://doi.org/10.5194/bg-12-2471-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 12, 2471–2487, 2015
https://doi.org/10.5194/bg-12-2471-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 29 Apr 2015

Research article | 29 Apr 2015

Large fluxes and rapid turnover of mineral-associated carbon across topographic gradients in a humid tropical forest: insights from paired 14C analysis

S. J Hall et al.

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We used measurements of radiocarbon to model the decomposition of organic matter associated with minerals in tropical rainforest soils, using contemporary and archived samples. Most organic matter decomposed over 11 to 26 years, while a smaller portion decomposed over centuries. Rates were similar among soils with strongly differing physical and chemical properties, but declined with a proxy for oxygen limitation. Previous models based on one time point may underestimate decomposition rates.
We used measurements of radiocarbon to model the decomposition of organic matter associated with...
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