Impact of land use and land cover changes on carbon storage in rubber dominated tropical Xishuangbanna, South West China
Chaya Sarathchandra, Yirga Alemu Abebe, Fiona Ruth Worthy, Iresha Wijerathne, Huaixia Ma, Bi Yingfeng, Guo Jiayu, Huafang Chen, Qiao-Shun Yan, Yanfei Geng, Dayani Shermila Weragoda, Lili Li, Yang Fengchun, Sriyani Wickramasinghe, Jianchu Xu
Abstract
ABSTRACT Land use and land cover (LULC) play a significant role in carbon regulation. South-China accounts for ~65% of China’s carbon sink. In Xishuangbanna (South-China), rubber is expanding rapidly creating an urgent need to understand and monitor LULC change and how spatial variation affects carbon storage (CS). This is vital for the formation and implementation of better land use management practices. We studied LULC changes of 22-year period; addressing how these changes have affected the CS. We quantified LULC changes between1988 and 2010 using remote sensing methods and calculated CS changes using InvEST. Results showed that between 1988 and 2010, the rate of deforestation accelerated to 203.2 km 2 y −1 and ~23% of forest were lost. Conversion of natural forest to rubber was responsible for 78% of this deforestation. Rubber expansion rate was 153.4 km 2 y −1 . Changes to LULC drove a temporal CS reduction 0.223 Tg C/km 2 . Local stakeholders have strong economic interest in converting land to more profitable plantations. Government efforts is required to control land conversion through new policies and incentives to retain natural forest. Assessment of specific potential land use change will be required to avoid promoting the conversion of high carbon storage land uses to low carbon storage land uses.