1. Fate of carbohydrates and lignin in north-east Siberian permafrost soils
- Author
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Leopold Sauheitl, Norman Gentsch, Birgit Wild, Georg Guggenberger, Jörg Schnecker, Hana Šantrůčková, Robert Mikutta, Thao Thi Dao, Tim Urich, Olga Shibistova, Antje Gittel, Nikolay Lashchinskiy, Petr Čapek, Jiří Bárta, and Andreas Richter
- Subjects
010504 meteorology & atmospheric sciences ,Tussock ,MATTER SOURCES ,Carbohydrates ,Soil Science ,Permafrost ,01 natural sciences ,Microbiology ,complex mixtures ,Lignin ,MICROBIAL-DEGRADATION ,chemistry.chemical_compound ,DISSOLVED ORGANIC-CARBON ,MULTIMOLECULAR TRACERS ,0105 earth and related environmental sciences ,Total organic carbon ,Soil organic matter ,TRIFLUOROACETIC-ACID HYDROLYSIS ,04 agricultural and veterinary sciences ,NEUTRAL SUGARS ,Decomposition ,Tundra ,OXIDE OXIDATION-PRODUCTS ,FOREST HUMUS LAYERS ,Agronomy ,chemistry ,Soil biomarker ,Environmental chemistry ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,LIQUID-CHROMATOGRAPHY ,FORMING PLANTS ,Soil fraction - Abstract
Permafrost soils preserve huge amounts of organic carbon (OC) prone to decomposition under changing climatic conditions. However, knowledge on the composition of soil organic matter (OM) and its transformation and vulnerability to decomposition in these soils is scarce. We determined neutral sugars and lignin-derived phenols, released by trifluoroacetic acid (TFA) and CuO oxidation, respectively, within plants and soil density fractions from the active layer and the upper permafrost layer at three different tundra types (shrubby grass, shrubby tussock, shrubby lichen) in the Northeast Siberian Arctic. The heavy fraction (HF; > 1.6 g mL(-1)) was characterized by a larger enrichment of microbial sugars (hexoses vs. pentoses) and more pronotmced lignin degradation (acids vs. aldehydes) as compared to the light fraction (LF
- Published
- 2018
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