Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands

doi:10.1016/j.jenvman.2016.03.010

	Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands
	Zhang, ZH (Zhang, Zhenhua)6; Chang, XF (Chang, Xiaofeng)5; Bao, XY (Bao, Xiaoying)8; Wang, SP (Wang, Shiping)1,3,4,7; Zhu, XX (Zhu, Xiaoxue)6,8; Luo, CY (Luo, Caiyun)6; Wilkes, A (Wilkes, Andreas)2; Wang, SP
刊名	JOURNAL OF ENVIRONMENTAL MANAGEMENT
	2016
卷号	173 期号:0 页码:121-126
关键词	Spatial Variability Climate-change Impacts Plateau Stocks Trend China Sequestration Management Steppe
DOI	10.1016/j.jenvman.2016.03.010
文献子类	Article
英文摘要	The effects of climate change and human activities on grassland degradation and soil carbon stocks have become a focus of both research and policy. However, lack of research on appropriate sampling design prevents accurate assessment of soil carbon stocks and stock changes at community and regional scales. Here, we conducted an intensive survey with 1196 sampling sites over an area of 190 km(2) of degraded alpine meadow. Compared to lightly degraded meadow, soil organic carbon (SOC) stocks in moderately, heavily and extremely degraded meadow were reduced by 11.0%, 13.5% and 17.9%, respectively. Our field survey sampling design was overly intensive to estimate SOC status with a tolerable uncertainty of 10%. Power analysis showed that the optimal sampling density to achieve the desired accuracy would be 2, 3, 5 and 7 sites per 10 km2 for lightly, moderately, heavily and extremely degraded meadows, respectively. If a subsequent paired sampling design with the optimum sample size were performed, assuming stock change rates, predicted by experimental and modeling results, we estimate that about 5-10 years would be necessary to detect expected trends in SOC in the top 20 cm soil layer. Our results highlight the utility of conducting preliminary surveys to estimate the appropriate sampling density and avoid wasting resources due to over-sampling, and to estimate the sampling interval required to detect an expected sequestration rate. Future studies will be needed to evaluate spatial and temporal patterns of SOC variability. (C) 2016 Published by Elsevier Ltd.
学科主题	普通生物学
语种	英语
WOS记录号	WOS:000374365100013
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/7698]
专题	青藏高原研究所_图书馆
通讯作者	Wang, SP
作者单位	1.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.World Agroforestry Ctr ICRAF, East & Cent Asia Program, 12 Zhongguancun Nan St, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Lasa 850012, Peoples R China 4.Tibet Univ, Naqu Integrated Observat & Res Stn Ecol & Environ, Lasa 850012, Peoples R China 5.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Peoples R China 6.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Haibei Alpine Meadow Ecosyst Res Stn, 23 Xinning Rd, Xining 810008, Peoples R China 7.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, 16 Lincui Rd, Beijing 100101, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, ZH ,Chang, XF ,Bao, XY ,et al. Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2016,173(0):121-126.
APA	Zhang, ZH .,Chang, XF .,Bao, XY .,Wang, SP .,Zhu, XX .,...&Wang, SP.(2016).Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands.JOURNAL OF ENVIRONMENTAL MANAGEMENT,173(0),121-126.
MLA	Zhang, ZH ,et al."Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands".JOURNAL OF ENVIRONMENTAL MANAGEMENT 173.0(2016):121-126.