Properties and bioavailability of particulate and mineral-associated organic matter in Arctic permafrost soils, Lower Kolyma Region, Russia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F15%3A43888736" target="_blank" >RIV/60076658:12310/15:43888736 - isvavai.cz</a>

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1111/ejss.12269/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1111/ejss.12269/abstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/ejss.12269" target="_blank" >10.1111/ejss.12269</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Properties and bioavailability of particulate and mineral-associated organic matter in Arctic permafrost soils, Lower Kolyma Region, Russia

Popis výsledku v původním jazyce

Permafrost degradation may cause strong feedbacks of arctic ecosystems to global warming, but this will depend on if, and to what extent, organic matter (OM) is protected against biodegradation by mechanisms other than freezing and anoxia. Here, we report on the amount, chemical composition and bioavailability of particulate (POM) and mineral-associated OM (MOM) in permafrost soils of the East Siberian Arctic. The average total organic carbon (OC) stock across all soils was 24.0 +/- 6.7 kg m(-2) within100 cm soil depth. Density fractionation (density cut-off 1.6 g cm(-3)) revealed that 54 +/- 16% of the total soil OC and 64 +/- 18% of OC in subsoil horizons was bound to minerals. As well as sorption of OM to clay-sized minerals (R-2 = 0.80; P < 0.01),co-precipitation of OM with hydrolyzable metals may also transfer carbon into the mineral-bound fraction. Carbon:nitrogen ratios, stable carbon and nitrogen isotopes, C-13-NMR and X-ray photoelectron spectroscopy showed that OM is transf

Název v anglickém jazyce

Properties and bioavailability of particulate and mineral-associated organic matter in Arctic permafrost soils, Lower Kolyma Region, Russia

Popis výsledku anglicky

Permafrost degradation may cause strong feedbacks of arctic ecosystems to global warming, but this will depend on if, and to what extent, organic matter (OM) is protected against biodegradation by mechanisms other than freezing and anoxia. Here, we report on the amount, chemical composition and bioavailability of particulate (POM) and mineral-associated OM (MOM) in permafrost soils of the East Siberian Arctic. The average total organic carbon (OC) stock across all soils was 24.0 +/- 6.7 kg m(-2) within100 cm soil depth. Density fractionation (density cut-off 1.6 g cm(-3)) revealed that 54 +/- 16% of the total soil OC and 64 +/- 18% of OC in subsoil horizons was bound to minerals. As well as sorption of OM to clay-sized minerals (R-2 = 0.80; P < 0.01),co-precipitation of OM with hydrolyzable metals may also transfer carbon into the mineral-bound fraction. Carbon:nitrogen ratios, stable carbon and nitrogen isotopes, C-13-NMR and X-ray photoelectron spectroscopy showed that OM is transf

Druh

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

CEP obor

DF - Pedologie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

European Journal of Soil Science

ISSN

1351-0754

e-ISSN

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Svazek periodika

66

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

722-734

Kód UT WoS článku

000357341900011

EID výsledku v databázi Scopus

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