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Can δ13C abundance, water-soluble carbon, and light fraction carbon be potential indicators of soil organic carbon dynamics in Zoigê wetland?

Auteur(s) et Affiliation(s)

GAO, J.
College of Nature Conservation, Forestry Univ., Beijing, Chine
LEI, G.
College of Nature Conservation, Forestry Univ., Beijing, Chine
ZHANG, X.
College of Nature Conservation, Forestry Univ., Beijing, Chine
WANG, G.
Dept. of Geography and Environmental Resources, Southern Illinois Univ., Carbondale, Etats-Unis


Description :
In this study, four wetland sites and one degraded wetland site in the Zoigê alpine wetland, located at the Qinghai-Tibet Plateau, were selected to investigate the relationships of stable isotope and labile organic carbon dynamics with groundwater elevation or water table level. The AA.also examine if the δ13C abundance, soil water soluble organic carbon (WSOC), light fraction organic carbon (LFOC), can be used as potential indicators of soil organic carbon (SOC) dynamics in these wetland sites. The results showed that the plant dominant species in the degraded wetland site were different from those in the non-degraded wetland sites. The regression analysis showed that LFOC was the best potential indicator of SOC dynamics with WSOC and soil δ13C being less useful as indicators, respectively. In addition, the absolute slope coefficients of the regression models increased as the soil depth increased, which indicated that the SOC turnover increased with soil depth.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, n°. 119, p. 21-27, nombre de pages : 7, Références bibliographiques : 35 ref.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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