青海省森林生态系统碳汇服务价值评估

Estimation and Evaluation of Forest Carbon Sinks Value in Qinghai Province

利用青海省森林资源更新调查数据,结合文献资料,采用生物量转换因子连续函数法对青海省森林生态系统植被碳库储量进行了估算。在此基础上,对其碳汇服务价值进行了初步评估。结果表明:1)青海省森林生态系统植被碳库储量为2869.92×104t。其中,乔木林活体、林下层和经济林碳储量分别为2447.31×104、449.31×104和1.53×104t,占森林植被碳库储量的84.53%、15.52%和0.05%。祁连圆柏、青海云杉、川西云杉、白桦和青杨是青海省森林生态系统植被碳库的主要组成部分,碳储量约占整个森林生态系统碳库储量的89.28%。全省主要优势树种碳密度平均值为47.79t/hm2,高于2008年全国森林植被碳密度平均值42.82t/hm2,但低于世界平均值86t/hm2。2)青海省森林生态系统提供的碳汇服务价值为51.28亿元,单位森林面积提供的碳汇服务价值为9310.16元hm-2。

The forest ecosystem carbon pools reserves of Qinghai Province were estimated with variable biomass expansion factor method （VBEF） based on updated forest resource survey database of Qinghai Province and combined with the literature. And then a preliminary evaluation of the service value of carbon pools were conducted using the carbon price on carbon markets. The results show that the carbon storage of arbor forest dominant species in Qinghai Province ecosystem is 28.6992 megaton （Mt）. The carbon storages of living body, understory and economic forest are 24. 4731Mt, 4. 4931Mt and 0. 0153Mt, respectively, 84. 53%, 15.52% and 5.2% of total carbon storage of forest plant, respectively. The species Juniperus przewalskii, Picea crassifolia, Picea likiangensis, Betula platyphylla and Populus cathayana are the main components of the carbon storage of forest ecosystem in Qinghai Province, and the carbon storage percentage is 89. 28 %. In the forest ecosystem of the province, the average biomass carbon density of the main arbor dominant species is 47.79t/hm2 , higher than that of forest vegetation in the whole country,42. 82 t/hm2 , but lower than that of the whole world,86 t/hm2. The results also show that the carbon storage service value delivered by the main arbor dominant species in forest ecosystem in Qinghai Province is about 5. 128 billion RMB. In terms of forest area of 550800 hectares,the carbon storage service value delivered by forest ecosystem is 9310. 16 RMB per hectare （ha.） in Qinghai Province.