Abstract:
Objective To explore the carbon storage of Sonneratia apetala in Guangdong Province, provide basic data for carbon sequestration investigation and monitoring based on mangrove biomass in Guangdong Province, and provide experiences and methods for monitoring mangrove carbon sequestration in China.
Method S. apetala vegetation and 0−100 cm soil were taken as research objects to build biomass model that could be universally used in Guangdong Province, and compare carbon storage of vegetation and soil in ten regions.
Result The biomass model of S. apetala was W=0.033(D2H)1.002, and the determination coefficient was 0.952. The fitting effect of the model was good. Total area of S. apetala forest in Guangdong Province was 1 724.12 hm2, total carbon storage was 536 801.09 t, vegetation carbon density was 50.81 t·hm−2, soil carbon density was 260.54 t·hm−2 and total carbon density was 311.35 t·hm−2. Vegetation carbon density was 16.32% of total carbon density, and soil carbon density was 83.68% of total carbon density. Total carbon reserves of S. apetala forest in ten regions were performed in the order of Shenzhen 2 790.65 t < Chaozhou 3 088.34 t < Huizhou 10 479.30 t < Jiangmen 13 800.58 t < Maoming 17 116.43 t < Zhanjiang 55 610.15 t < Zhongshan 58 562.90 t < Shantou 66 498.62 t < Guangzhou 134 938.18 t < Zhuhai 173 915.93 t.
Conclusion Carbon storage of S. apetala in Guangdong Province is mainly concentrated in soil layer. Soil carbon storage and vegetation carbon storage of S. apetala are obviously different in different regions.