remote sensing Article Spatio-Temporal Variation and Impact Factors for Vegetation Carbon Sequestration and Oxygen Production Based on Rocky Desertification Control in the Karst Region of Southwest China Mingyang Zhang 1,2, Kelin Wang 1,2,*, Huiyu Liu 3,4, Jing Wang 1,2, Chunhua Zhang 1,2, Yuemin Yue 1,2 and Xiangkun Qi 1,2 1 Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, No. 644, Yuanda 2nd Road, Furong District, Changsha 410125, China;
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[email protected] (Q.X.) 2 Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang 547100, China 3 College of Geography Science, Nanjing Normal University, No.1, Wenyuan Road, Xianlin University District, Nanjing 210046, China;
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[email protected], Tel.: +86-731-8461-5201; Fax: +86-731-8461-2685 Academic Editors: Parth Sarathi Roy and Prasad S. Thenkabail Received: 30 September 2015; Accepted: 20 January 2016; Published: 28 January 2016 Abstract: The Grain to Green Program (GTGP) and eco-environmental emigration have been employed to alleviate poverty and control rocky desertification in the Southwest China Karst region. Carbon sequestration and oxygen production (CSOP) is used to indicate major ecological changes, because they involve complex processes of material circulation and energy flow. Using remote sensing images and weather records, the spatiotemporal variation of CSOP was analyzed in a typical karst region of northwest Guangxi, China, during 2000–2010 to determine the effects of the Chinese government’s ecological rehabilitation initiatives implemented in 1999.