Effects of Wetland Restoration and Conservation Projects on Soil Carbon Sequestration in the Ningxia Basin of the Yellow River in China from 2000 to 2015

Xiaoyan Bu, Dan Cui, Suocheng Dong, Wenbao Mi, Yu Li, Zhigang Li and Yaliang Feng
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Xiaoyan Bu: School of Resource and Environmental Sciences, Ningxia University, Yinchuan 750021, China
Dan Cui: School of Government, Peking University, Beijing 100871, China
Suocheng Dong: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Wenbao Mi: School of Resource and Environmental Sciences, Ningxia University, Yinchuan 750021, China
Yu Li: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Zhigang Li: School of Resource and Environmental Sciences, Ningxia University, Yinchuan 750021, China
Yaliang Feng: School of Resource and Environmental Sciences, Ningxia University, Yinchuan 750021, China

Sustainability, 2020, vol. 12, issue 24, 1-25

Abstract: The long-term use of wetlands stresses wetland ecosystems and leads to degradation and C loss. This study explored an optimal remote sensing-multivariate linear regression model (RS-MLRM) for estimating wetland soil organic carbon (SOC) by using a combination of the measured SOC and above ground biomass (AGB) from 273 samples, textural features, spectral information, and a vegetation index calculated from Landsat-8 images using the Ningxia Basin of the Yellow River as the study area. To derive the optimal predictor model for SOC, these variables were regressed against the measured SOC. These were used to predict SOC and evaluate the contribution of wetland restoration and conservation projects to soil carbon sequestration and sinks on the Ningxia Basin of the Yellow River in early (2000 and 2005), intermediate (2010), and recent (2015) years. The results show that from 2000 to 2015, the project-induced contribution to C sequestration was 20.49 TC, with an annual sink of 1.37 TC. This accounted for 54.06% of the total wetland ecosystem C sequestration on the Ningxia Basin of the Yellow River. Moreover, there was a significant success of restoration and conservation projects regarding C sequestration. These restoration and conservation projects have substantially contributed to CO 2 mitigation in the arid area.

Keywords: soil carbon sink; carbon sequestration; texture features; RS-MLRM; ecological restoration and conservation project; the arid wetland; Ningxia Basin of the Yellow River (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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