Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F13%3A43885732" target="_blank" >RIV/60076658:12310/13:43885732 - isvavai.cz</a>
Result on the web
<a href="http://ac.els-cdn.com/S0038071713002691/1-s2.0-S0038071713002691-main.pdf?_tid=93b500da-8d78-11e3-948a-00000aacb35f&acdnat=1391503656_13aa6ba805793dbffd344814a100d802" target="_blank" >http://ac.els-cdn.com/S0038071713002691/1-s2.0-S0038071713002691-main.pdf?_tid=93b500da-8d78-11e3-948a-00000aacb35f&acdnat=1391503656_13aa6ba805793dbffd344814a100d802</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland
Original language description
Turbic Cryosols (permafrost soils characterized by cryoturbation, i.e., by mixing of soil layers due to freezing and thawing) are widespread across the Arctic, and contain large amounts of poorly decomposed organic material buried in the subsoil. This cryoturbated organic matter exhibits retarded decomposition compared to organic material in the topsoil. Since soil organic matter (SUM) decomposition is known to be tightly linked to N availability, we investigated N transformation rates in different soilhorizons of three tundra sites in north-eastern Siberia and Greenland. We measured gross rates of protein depolymerization, N mineralization (ammonification) and nitrification, as well as microbial uptake of amino acids and NH4+ using an array of N-15 pool dilution approaches. We found that all sites and horizons were characterized by low N availability, as indicated by low N mineralization compared to protein depolymerization rates (with gross N mineralization accounting on average for
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DF - Pedology
OECD FORD branch
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Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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