Plant-derived compounds stimulate the decomposition of organic matter in arctic permafrost soils

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Wild, Birgit; Gentsch, Norman; Capek, Petr; Diakova, Katerina; Alves, Ricardo J. Eloy et al.: Plant-derived compounds stimulate the decomposition of organic matter in arctic permafrost soils. In: Scientific Reports 6 (2016), 25607. DOI: http://dx.doi.org/10.1038/srep25607

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Sum total of downloads: 238




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Abstract: 
Arctic ecosystems are warming rapidly, which is expected to promote soil organic matter (SOM) decomposition. In addition to the direct warming effect, decomposition can also be indirectly stimulated via increased plant productivity and plant-soil C allocation, and this so called "priming effect" might significantly alter the ecosystem C balance. In this study, we provide first mechanistic insights into the susceptibility of SOM decomposition in arctic permafrost soils to priming. By comparing 119 soils from four locations across the Siberian Arctic that cover all horizons of active layer and upper permafrost, we found that an increased availability of plant-derived organic C particularly stimulated decomposition in subsoil horizons where most of the arctic soil carbon is located. Considering the 1,035 Pg of arctic soil carbon, such an additional stimulation of decomposition beyond the direct temperature effect can accelerate net ecosystem C losses, and amplify the positive feedback to global warming.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2016
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
total perc.
1 image of flag of Germany Germany 174 73.11%
2 image of flag of United States United States 25 10.50%
3 image of flag of China China 13 5.46%
4 image of flag of No geo information available No geo information available 6 2.52%
5 image of flag of Czech Republic Czech Republic 4 1.68%
6 image of flag of Austria Austria 4 1.68%
7 image of flag of Brazil Brazil 2 0.84%
8 image of flag of Taiwan Taiwan 1 0.42%
9 image of flag of Romania Romania 1 0.42%
10 image of flag of Netherlands Netherlands 1 0.42%
    other countries 7 2.94%

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