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Stable carbon isotope as a signal index for monitoring grassland degradation.

Abstract：

:Grassland degradation due to overgrazing is common in many areas of the world. This study analyzed the potential of the stable carbon isotope (δ(13)C) value as a structural microcosmic index to monitor processes of grassland degradation. The δ(13)C values of plant leaves, roots and soils in non-grazed (NG) and over-grazed (OG) grassland were measured from samples collected from the seven types of grassland in China. We found that the leaf δ(13)C values of palatable species (δ(13)Cleaf) and root δ(13)C values (δ(13)Croot) in OG grasslands were reduced compared with those from NG grasslands. Furthermore, the δ(13)Cleaf and δ(13)Csoil were positive correlation with elevation and latitude, δ(13)Croot was negative correlation with them at high altitude (3000~5000m), and δ(13)Croot and δ(13)Csoil were negative correlation with them at low altitude (0~2000m), respectively. Consequently, tracing of the δ(13)C variations in grassland ecosystem can provide a powerful tool to evaluate the degree of grassland degradation.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Yao H,Wilkes A,Zhu G,Zhang H,Liu X,Dan Ding,Zhai X,Tang S,Chen Q,Zhang Y,Huang D,Wang C

doi

10.1038/srep31399

subject

Has Abstract

pub_date

2016-08-16 00:00:00

pages

31399

issn

2045-2322

pii

srep31399

journal_volume

6

pub_type

杂志文章

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