Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands
文献类型：期刊论文
| 作者 | Xiaofeng Chang1; Xiaoying Bao1,5; Shiping Wang3,4,6; Xiaoxue Zhu2,5; Caiyun Luo2; Zhenhua Zhang2; Andreas Wilkes7 |
| 刊名 | Journal of Environmental Management
 |
| 出版日期 | 2016 |
| 期号 | 173页码:121-126 |
| 通讯作者邮箱 | wangsp@itpcas.ac.cn |
| 关键词 | Soil monitoring Effective sample size Sampling interval Grassland degradation |
| 通讯作者 | Shiping Wang |
| 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 km2 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 5e10 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000374365100013 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/7791]  |
| 专题 | 水土保持研究所_水保所科研产出--SCI_2016--SCI |
| 作者单位 | 1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, 26 Xinong Road, Yangling 712100, China 2.Key Laboratory of Adaptation and Evolution of Plateau Biota, Haibei Alpine Meadow Ecosystem Research Station, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, 23 Xinning Road, Xining 810008, China 3.Key Laboratory of Alpine Ecology and Biodiversity of the Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 16 Lincui Road, Beijing 100101, China 4.CAS Center for Excellence in Tibetan Plateau Earth Science, Beijing 100101, China 5.University of the Chinese Academy of Sciences, Beijing 100049, China 6.Naqu Integrated Observation and Research Station on Ecology and Environment, Tibet University and Institute of Tibetan Plateau Research of the Chinese Academy of Sciences, Lasa 850012, China 7.World Agroforestry Centre (ICRAF) East and Central Asia Program, 12 Zhongguancun Nan Street, Beijing 100081, China |
| 推荐引用方式 GB/T 7714 | Xiaofeng Chang,Xiaoying Bao,Shiping Wang,et al. Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands[J]. Journal of Environmental Management,2016(173):121-126. |
| APA | Xiaofeng Chang.,Xiaoying Bao.,Shiping Wang.,Xiaoxue Zhu.,Caiyun Luo.,...&Andreas Wilkes.(2016).Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands.Journal of Environmental Management(173),121-126. |
| MLA | Xiaofeng Chang,et al."Exploring effective sampling design for monitoring soil organic carbon in degraded Tibetan grasslands".Journal of Environmental Management .173(2016):121-126. |
入库方式： OAI收割
来源：水土保持研究所
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