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	Permafrost and land cover as controlling factors for light fraction organic matter on the southern Qinghai-Tibetan plateau
	Wu, Xiaodong1; Zhao, Lin1; Hu, Guojie1; Liu, Guimin2; Li, Wangping3; Ding, Yongjian1,4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-02-01
卷号	613页码:1165-1174
关键词	Soil organic carbon Total nitrogen Global warming Soil texture C: N ratios
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.09.052
通讯作者	Zhao, Lin(linzhao@lzb.ac.cn)
英文摘要	Permafrost degradation can stimulate the decomposition of organic soil matter and cause a large amount of greenhouse gas emissions into the atmosphere. The light fraction organic matter (LFOM) is a labile substrate for microbial decomposition and probably plays an important role in future permafrost carbon cycles. However, little is known about the distribution of LFOM and its relationship with permafrost and environmental factors. Here, we investigated the light fraction carbon (LFC) and nitrogen (LFN) contents and stocks under meadows and wet meadows with different permafrost conditions on the southern Qinghai-Tibetan Plateau. Our results showed that LFC and LFN were mainly distributed in the upper 30 cm of soils, and the sites with permafrost had significantly higher contents of LFC and LFN than those from the sites without existing permafrost. The LFC and LFN decreased sharplywith depth, suggesting that the soil organicmatter (SOM) in this areawas highly decomposed in deep soils. Soil moisture and bulk density explained approximately 50% of the variances in LFC and LFN for all the sampling sites, while soil moisture explained approximately 30% of the variance in permafrost sites. Both the C:N ratios and LFC: LFN ratios in the sites with permafrost were higher than those in the sites without permafrost. The results suggested that the permafrost and land cover types are the main factors controlling LFOM content and stock, and that permafrost degradation would lead to a decrease of LFOM and soil C: N ratios, thus accelerating the decomposition of SOM. (C) 2017 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	SOIL-WATER CONTENT ; NITROGEN MINERALIZATION ; ALPINE ECOSYSTEM ; CLIMATE-CHANGE ; CARBON ; REGIONS ; STOCKS ; CHEMISTRY ; CHINA ; VULNERABILITY
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000414160500117
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557635
专题	寒区旱区环境与工程研究所
通讯作者	Zhao, Lin
作者单位	1.Chinese Acad Sci, Cryosphere Res Stn Qinghai Tibetan Plateau, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, 320 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China 2.Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, 88 West Anning Rd, Lanzhou 730070, Gansu, Peoples R China 3.Lanzhou Univ Technol, Sch Civil Engn, 287 Langonping Rd, Lanzhou 730050, Gansu, Peoples R China 4.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Xiaodong,Zhao, Lin,Hu, Guojie,et al. Permafrost and land cover as controlling factors for light fraction organic matter on the southern Qinghai-Tibetan plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,613:1165-1174.
APA	Wu, Xiaodong,Zhao, Lin,Hu, Guojie,Liu, Guimin,Li, Wangping,&Ding, Yongjian.(2018).Permafrost and land cover as controlling factors for light fraction organic matter on the southern Qinghai-Tibetan plateau.SCIENCE OF THE TOTAL ENVIRONMENT,613,1165-1174.
MLA	Wu, Xiaodong,et al."Permafrost and land cover as controlling factors for light fraction organic matter on the southern Qinghai-Tibetan plateau".SCIENCE OF THE TOTAL ENVIRONMENT 613(2018):1165-1174.

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