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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; Wang, SP (reprint author), Chinese Acad Sci, Inst Tibetan Plateau Res, Lab Alpine Ecol & Biodivers, 16 Lincui Rd, Beijing 100101, Peoples R China.; wangsp@itpcas.ac.cn
2014
发表期刊BIOGEOSCIENCES
ISSN1726-4170
卷号11期号:13页码:3495-3503
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.
关键词Terrestrial Ecosystems Grassland Management China Dynamics Steppe Systems 1980s Model
资助信息Chinese Academy of Sciences [2013CB956000, XDB03030403, XDA05070205]; National Science Foundation for Young Scientists [41303062]; West Light Foundation of the Chinese Academy of Science
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/18320
专题中国西南野生生物种质资源库
通讯作者Wang, SP (reprint author), Chinese Acad Sci, Inst Tibetan Plateau Res, Lab Alpine Ecol & Biodivers, 16 Lincui Rd, Beijing 100101, Peoples R China.; wangsp@itpcas.ac.cn
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
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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..,...&wangsp@itpcas.ac.cn.(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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