Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet

	Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet
	Zhang, Fawei 1; Liu, Shuli 1,4; Tang, Yanhong 2,3; Li, Qian 1; Guo, Xiaowei1 ; Li, Yikang 1; Lin, Li 1; Du, Yangong 1; Cao, Guangmin 1
刊名	ECOLOGICAL RESEARCH
	2017-05-01
卷号	32 期号:3 页码:395-404
关键词	Soil carbon Grassland degradation Carbon storage Northern Tibet
英文摘要	The effect of livestock grazing on grassland degradation and the resulting impact on soil carbon concentration is an important factor in carbon estimation. We addressed this issue using field observations and laboratory analysis of samples from Tibetan grassland. Based on the field measurements, we investigated the soil organic carbon (SOC) and soil inorganic carbon (SIC) under two contrasting degradation states: lightly or non-degraded grasslands (LDG) and heavily degraded grasslands (HDG). We assessed their relationships with environmental factors using data collected from 99 sites across Northern Tibet during 2011-2012. Data were analyzed using a linear mixed-effects model and one-way ANOVA. The results showed that: (1) SOC concentration decreased and SIC concentration increased following grassland degradation, especially at soil depths in the range of 0-10 cm (P < 0.05); (2) the major environmental factors affecting SOC and SIC were soil pH and plant biomass; (3) spatially, the SOC density increased with the mean annual temperature and mean annual precipitation, whereas SIC exhibited the opposite trend; (4) the SOC density increased at first and then decreased with increasing grazing intensity, with an opposite trend in SIC; and (5) soil carbon storage in this region was 0.14 Pg smaller in the HDG than in the LDG. This study suggests that grassland degradation can significantly affect the vertical distribution and storage of SOC and SIC. The carbon sequestration capacity of the top 100 cm of soil in Northern Tibet was estimated as 0.14 Pg.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Ecology
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	QINGHAI PROVINCE ; LAND DEGRADATION ; CLIMATE-CHANGE ; ALPINE MEADOW ; CO2 EMISSIONS ; CHINA ; STORAGE ; SEQUESTRATION ; PLATEAU ; MANAGEMENT
收录类别	SCI
语种	英语
WOS记录号	WOS:000399834600011
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/7066]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Northwest Inst Plateau Biol, 23 Xinning Rd, Xining 810008, Qinghai, Peoples R China 2.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, 5 Yiheyuan Rd, Beijing 100871, Peoples R China 3.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, 5 Yiheyuan Rd, Beijing 100871, Peoples R China 4.Jiangxi Normal Univ, Sch Life Sci, 99 Ziyang Rd, Nanchang 330022, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Fawei,Liu, Shuli,Tang, Yanhong,et al. Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet[J]. ECOLOGICAL RESEARCH,2017,32(3):395-404.
APA	Zhang, Fawei.,Liu, Shuli.,Tang, Yanhong.,Li, Qian.,Guo, Xiaowei.,...&Cao, Guangmin.(2017).Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet.ECOLOGICAL RESEARCH,32(3),395-404.
MLA	Zhang, Fawei,et al."Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet".ECOLOGICAL RESEARCH 32.3(2017):395-404.