海南东寨港红树林保护区碳储量及固碳功能价值评估

Carbon Storage and Sequestration Function Evaluation in Dongzhaigang Mangrove Reserve of Hainan

以海南东寨港红树林保护区为例,利用遥感判读、野外调查和采样数据,采用经验公式和实验室分析方法,计算了12种红树群落植物和土壤的固碳量,得到海南东寨港红树群落的固碳总量为29.56×104t,单位面积固碳量为187.54 t/hm2,其中,土壤固碳量达到90.99%;最后,运用碳税法计算东寨港红树林固碳功能价值为2.75×108元,单位面积红树林的固碳功能价值为17.44×104元。

Mangroves thrive along the coastlines throughout most of the tropical and subtropical areas, and provide a range of essential ecosystem services such as purification, coastline protection, carbon sinks and biodiversity nursery, among which carbon sinks function attracts more attentions in recent years. In this study, we present a quantitative study about the carbon storage in both mangrove standing tree and soil in Dongzhaigang Mangrove Reserve of Hainan. Based on Remote Sensing and Geography Information System, along with field investigation, 12 types of mangrove communities were classified, including Bruguiera marina, Bruguiera sexangula and Bruguiera gymnoihiza communities, Excoecaria agallocha communities, Lumnitzera racemosa communities, Avicennia marina communities, Ceriops tagal communities, Kandelia candel communities, Aegiceras corniculatum communities, Rhizophora stylosa and Rhizophora apiculata communities, Sonneratiacaseolaris communities, Sonneratia apetala communities, Acrostichum aureum and Acanthus ilicifolius communities,semi-mangrove(Pongamia pinnata and Hibiscus tiliaceus)communities. Meanwhile, the remotely sensed data showed the area of 12 mangrove communities which summed up to 1 576.24 hm2. Subsequently, standard methods for sampling were used to collect samples of plants and soil from 12 different mangrove communities in the study area. In the laboratory, Heavy Complex Acid Potassium Heating methods and Plant Biomass methods were used separately to calculate the carbon storage in soil and plant samples. The results showed that the total carbon storage in Dongzhaigang mangrove reserve was 29.56×104t C and 187.54 t/hm2 on average, including 26.90×104t C in soil and 2.66×104t C in living plant. Moreover, Carbon tax methods were used to calculate the function value of mangrove carbon storage, it is concluded that the carbon sequestration value of the research area was 2.75×108yuan and 17.44×104yuan/hm2. Finally, it come the conclusions that the carbon sequestration function of mangrove wetlands is extremely enormous, protection of mangrove soil and plant is with great importance to balance the carbon cycling in the coastal area of tropical and subtropical areas.