Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau

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	Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau
	Chang, X. F.1,2; Zhu, X. X.3,4; Wang, S. P.1; Cui, S. J.3,4; Luo, C. Y.3; Zhang, Z. H.3; Wilkes, A.5
	2014
发表期刊	BIOGEOSCIENCES
ISSN	1726-4170
卷号	11 期号:13 页码:3495-3503
文章类型	Article
摘要	Grassland soil organic carbon (SOC) is sensitive to anthropogenic activities. Increased anthropogenic disturbance related to overgrazing has led to widespread alpine grassland degradation on the Tibetan Plateau. The degraded grasslands are considered to have great potential for carbon sequestration after adoption of improved management practices. Here, we calibrated and employed the Century model to investigate the effects of overgrazing and improved managements on the SOC dynamics in alpine meadows. We calibrated the Century model against plant productivity at the Haibei Research Station. SOC stocks for validation were obtained in 2009-2010 from degraded alpine meadows in two communes. We found that Century model can successfully capture grassland SOC changes. Overall, our simulation suggests that degraded alpine meadow SOC significantly increased with the advent of restoration management from 2011 to 2030. Carbon sequestration rates ranged between 0.04 Mg C ha(-1) yr(-1) in lightly degraded winter grazing grasslands and 2.0 Mg C ha(-1) yr(-1) in moderately degraded summer grazing grasslands. Our modelling work also predicts that improve management in degraded Tibetan grasslands will contribute to an annual carbon sink of 0.022-0.059 Pg C yr(-1). These results imply that restoration of degraded grasslands in the Tibetan Plateau has great potential for soil carbon sequestration to mitigate greenhouse gases.; Grassland soil organic carbon (SOC) is sensitive to anthropogenic activities. Increased anthropogenic disturbance related to overgrazing has led to widespread alpine grassland degradation on the Tibetan Plateau. The degraded grasslands are considered to have great potential for carbon sequestration after adoption of improved management practices. Here, we calibrated and employed the Century model to investigate the effects of overgrazing and improved managements on the SOC dynamics in alpine meadows. We calibrated the Century model against plant productivity at the Haibei Research Station. SOC stocks for validation were obtained in 2009-2010 from degraded alpine meadows in two communes. We found that Century model can successfully capture grassland SOC changes. Overall, our simulation suggests that degraded alpine meadow SOC significantly increased with the advent of restoration management from 2011 to 2030. Carbon sequestration rates ranged between 0.04 Mg C ha(-1) yr(-1) in lightly degraded winter grazing grasslands and 2.0 Mg C ha(-1) yr(-1) in moderately degraded summer grazing grasslands. Our modelling work also predicts that improve management in degraded Tibetan grasslands will contribute to an annual carbon sink of 0.022-0.059 Pg C yr(-1). These results imply that restoration of degraded grasslands in the Tibetan Plateau has great potential for soil carbon sequestration to mitigate greenhouse gases.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
关键词[WOS]	TERRESTRIAL ECOSYSTEMS ; GRASSLAND MANAGEMENT ; CHINA ; DYNAMICS ; STEPPE ; SYSTEMS ; 1980S ; MODEL
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:000339265800005
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/4274
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Inst Tibetan Plateau Res, Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Haibei Alpine Meadow Ecosyst Res Stn, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Kunming Inst Bot, Ctr Mt Ecosyst Studies, Kunming 650201, Peoples R China
推荐引用方式 GB/T 7714	Chang, X. F.,Zhu, X. X.,Wang, S. P.,et al. Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau[J]. BIOGEOSCIENCES,2014,11(13):3495-3503.
APA	Chang, X. F..,Zhu, X. X..,Wang, S. P..,Cui, S. J..,Luo, C. Y..,...&Wilkes, A..(2014).Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau.BIOGEOSCIENCES,11(13),3495-3503.
MLA	Chang, X. F.,et al."Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau".BIOGEOSCIENCES 11.13(2014):3495-3503.

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