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	Seasonal changes in labile organic matter as a function of environmental factors in a relict permafrost region on the qinghai-tibetan plateau
	Liu, Guimin1,2; Zhang, Xiaolan1; Wu, Tonghua2; Wu, Xiaoli1; Smoak, Joseph M.3; Li, Xinxing1; Ji, Genghao1; Xu, Haiyan1; Ma, Xiaoliang1; Li, Hongqin1
刊名	Catena
	2019-09-01
卷号	180页码:194-202
关键词	Relict permafrost Light fraction organic carbon Water extractable organic carbon Seasonal changes Depth
ISSN号	0341-8162
DOI	10.1016/j.catena.2019.04.026
通讯作者	Liu, guimin(liuguimin@mail.lzjtu.cn) ; Wu, xiaodong(wuxd@lzb.ac.cn)
英文摘要	Labile organic matter plays an important role in permafrost carbon cycling, however, little is known about the effects of permafrost on labile organic matter dynamics. here, we examined seasonal changes in the labile organic matter including light fraction carbon (lfc), water extractable organic carbon (weoc), microbial biomass carbon (mbc) and nitrogen (mbn) contents in a relict permafrost region on the eastern edge of the qinghai-tibetan plateau (qtp), china. we selected three different areas including permafrost, boundary, and seasonally frozen ground area. the results showed that seasonal changes in labile organic matter were not the result of soil heterogeneity. among all three areas, depth strongly correlated with labile organic matter content. lfc was significantly associated with the soil organic carbon (soc) content. the mbc contents, which were the lowest in permafrost area but highest in seasonally frozen ground area, were strongly affected by temperature. multiple linear regression models showed that temperature was a significant predictor for labile organic matter in the permafrost area, but the effects of temperature were weaker in the boundary and seasonally frozen ground areas. our results suggested that permafrost degradation could decrease production but increase decomposition rates of labile organic matter in permafrost regions, and this process should be taken into consideration in permafrost carbon cycle models.
收录类别	SCI
WOS关键词	NITROGEN MINERALIZATION ; CLIMATE-CHANGE ; SOIL ; CARBON ; FRACTIONS ; TEMPERATURE ; BACTERIAL ; TUNDRA ; STOCKS ; POOLS
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000472244900018
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555409
专题	寒区旱区环境与工程研究所
通讯作者	Liu, Guimin; Wu, Xiaodong
作者单位	1.Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Gansu, Peoples R China 2.Chinese Acad Sci, Cryosphere Res Stn Qinghai Tibetan Plateau, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resource, Lanzhou 730000, Gansu, Peoples R China 3.Univ S Florida, Environm Sci, St Petersburg, FL USA 4.Chinese Acad Sci, Key Lab Ecohydrol River Basin Sci, 320 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China 5.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 6.Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210000, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Guimin,Zhang, Xiaolan,Wu, Tonghua,et al. Seasonal changes in labile organic matter as a function of environmental factors in a relict permafrost region on the qinghai-tibetan plateau[J]. Catena,2019,180:194-202.
APA	Liu, Guimin.,Zhang, Xiaolan.,Wu, Tonghua.,Wu, Xiaoli.,Smoak, Joseph M..,...&Wu, Xiaodong.(2019).Seasonal changes in labile organic matter as a function of environmental factors in a relict permafrost region on the qinghai-tibetan plateau.Catena,180,194-202.
MLA	Liu, Guimin,et al."Seasonal changes in labile organic matter as a function of environmental factors in a relict permafrost region on the qinghai-tibetan plateau".Catena 180(2019):194-202.

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