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Articles | Volume 11, issue 2
Articles | Volume 11, issue 2
https://doi.org/10.5194/soil-11-991-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-11-991-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 11, issue 2
Original research article
 | 
28 Nov 2025
Original research article |  | 28 Nov 2025

Availability of labile carbon controls the temperature-dependent response of soil organic matter decomposition in alpine soils

Dario Püntener, Tatjana C. Speckert, Yves-Alain Brügger, and Guido L. B. Wiesenberg

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Short summary
Alpine soils store much carbon but warming and changes in vegetation could reverse this by turning them into carbon sources. In a one-year laboratory study, we examined alpine forest and pasture soils and added fresh grass litter marked with a carbon tracer to track decomposition under different temperatures. Our findings reveal that fresh plant material drives soil breakdown more than temperature alone, offering new insights into how climate change may affect carbon storage in mountain regions.
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