Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland

Kód výsledku v 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>

Výsledek na webu

<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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Jazyk výsledku

angličtina

Název v původním jazyce

Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DF - Pedologie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Soil Biology & Biochemistry

ISSN

0038-0717

e-ISSN

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Svazek periodika

67

Číslo periodika v rámci svazku

dec

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

85-93

Kód UT WoS článku

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EID výsledku v databázi Scopus

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