The isotopic composition of soil organic carbon on a north - south transect in western Canada.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077379%3A_____%2F02%3A61033073" target="_blank" >RIV/60077379:_____/02:61033073 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The isotopic composition of soil organic carbon on a north - south transect in western Canada.

Popis výsledku v původním jazyce

The minor isotopes of carbon (13C and 14C) are widely used as tracers in studies of the global carbon cycle. We present carbon-isotope data for the 0-5 cm layer of soil on a transect from 49,6 degN to 68 degN, from mature forest and tundra ecosystems inthe boreal-arctic zone of interior western Canada. Soil organic carbon in the <2000 microm fraction of the soil decreases from 3,14 kg.m-2 in the south to 1,31 kg.m-2 in the north. The 14C activity of the organic carbon decreases as latitude increases from 118,9 to 100,7 per cent modern carbon (pMC). In addition, the 14C activities of organic carbon in the particle-size fractions of each sample decrease as particle size decreases. These results suggest that organic carbon in the 0-5 cm layer of these soils transfers from standing biomass into the coarsest size fractions of the soil and is then degraded over time, with the residue progressively transferred into the more resistant finer particle sizes. We calculate residence times for the

Název v anglickém jazyce

The isotopic composition of soil organic carbon on a north - south transect in western Canada.

Popis výsledku anglicky

The minor isotopes of carbon (13C and 14C) are widely used as tracers in studies of the global carbon cycle. We present carbon-isotope data for the 0-5 cm layer of soil on a transect from 49,6 degN to 68 degN, from mature forest and tundra ecosystems inthe boreal-arctic zone of interior western Canada. Soil organic carbon in the <2000 microm fraction of the soil decreases from 3,14 kg.m-2 in the south to 1,31 kg.m-2 in the north. The 14C activity of the organic carbon decreases as latitude increases from 118,9 to 100,7 per cent modern carbon (pMC). In addition, the 14C activities of organic carbon in the particle-size fractions of each sample decrease as particle size decreases. These results suggest that organic carbon in the 0-5 cm layer of these soils transfers from standing biomass into the coarsest size fractions of the soil and is then degraded over time, with the residue progressively transferred into the more resistant finer particle sizes. We calculate residence times for the

Druh

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

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

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

53

Číslo periodika v rámci svazku

N/A

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

393-403

Kód UT WoS článku

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EID výsledku v databázi Scopus

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