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DOI	10.1016/j.catena.2020.104894
	Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area
	Liu, Guimin; Wu, Tonghua; Hu, Guojie; Wu, Xiaodong; Li, Wangping
通讯作者	Liu, GM (通讯作者)，88 West Aiming Rd, Lanzhou 730070, Peoples R China. ; Wu, XD (通讯作者)，320 West Donggang Rd, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0341-8162
EISSN	1872-6887
卷号	196
英文摘要	Permafrost regions store a large amount of soil organic carbon (SOC). Although permafrost degradation with climate warming can stimulate soil organic matter (SOM) decomposition, it remains unknown that whether the permafrost existence benefits SOM preservation. Here, a boundary area of permafrost and non-permafrost zone was selected to test the hypothesis that SOM underlain by permafrost has been better preserved than the area without permafrost under similar climatic conditions. The interactions among topography, vegetation cover, permafrost, soil variables and SOC distribution were examined. The results showed the sites beneath wet meadow land covers, which are usually underlain by permafrost, have higher SOC stocks than those of alpine meadows without permafrost. Based on mixed effects models, both soil water content and bulk density explained higher SOC content variances in the sites without permafrost than the sites underlain by permafrost. The north-facing non-permafrost sites have significantly higher SOC contents than those in south-facing non-permafrost sites. Vegetation cover, aspect, and permafrost have mixing effects on SOC contents both in permafrost and nonpermafrost sites. Soil particle size and the rock fragment content are good predictors for prediction of SOC contents, while the best predictor was depending on the presence of permafrost. These results suggested that under similar climatic conditions, permafrost existence favors the preservation of SOM, this should be taken into consideration in the future carbon emission from permafrost regions since permafrost degradation can lag behind climate warming in many areas.
关键词	QINGHAI-TIBET PLATEAU SPATIAL VARIABILITY BULK-DENSITY NITROGEN STOCKS REGIONS CLIMATE MINERALIZATION VULNERABILITY PEDOGENESIS
英文关键词	Qinghai-Tibetan Plateau; Soil organic carbon; Permafrost; Seasonally frozen ground area; Physico-chemical variables
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000583955200052
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255111
作者单位	[Liu, Guimin] Lan Jiaotong Univ, Sch Environm & Municipal Engn, 88 West Anning Rd, Lanzhou 730070, Peoples R China; [Liu, Guimin; Wu, Tonghua; Hu, Guojie; Wu, Xiaodong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibetan Plateau, 320 West Donggang Rd, Lanzhou 730000, Peoples R China; [Li, Wangping] Lanzhou Univ Technol, Sch Civil Engn, 287 Langongping Rd, Lanzhou 730050, Peoples R China; [Wu, Tonghua] Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China; [Wu, Tonghua; Wu, Xiaodong] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Guimin,Wu, Tonghua,Hu, Guojie,et al. Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area[J]. 中国科学院西北生态环境资源研究院,2021,196.
APA	Liu, Guimin,Wu, Tonghua,Hu, Guojie,Wu, Xiaodong,&Li, Wangping.(2021).Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area.CATENA,196.
MLA	Liu, Guimin,et al."Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area".CATENA 196(2021).