青海主要乔木林生态系统公益的评估

以青海省主要乔木林生态系统为研究对象，根据2004～2006年青海省森林资源规划设计调查资料及森林生态系统公益资料计算了青海主要乔木林生态系统公益价值。结果表明：青海省乔木林生态系统公益总价值每年约为1．47亿美元，其中以森林气候控制的贡献最大，约占28．35％，而原材料的贡献仅为8．54％；在森林的3大效益中，生态效益的价值是经济价值的3．05倍，反映出森林生态系统公益的显著性。研究发现，各类乔木林生态系统公益总价值与其蓄积量之间存在显著线性正相关关系（R2=0．744，P〈0．001），这对于简化生态系统公益价值的评估具有重要意义。

Estimation of Ecosystem Commonweal of Main Arboreal Forest in Qinghai

The values of ecosystem commonweal of arboreal forests in Qinghai were evaluated and analyzed according to the forest inventory data from the investigation of designed forest resources project in Qinghai(from 2004 to 2006) and the global average values of forest ecosystem services were given.The results showed that the value of forest ecosystem services in Qinghai costs at least was about ＄1.47×108,considering 14 types of ecosystem services annually.Among the three services of forest ecosystem,the value of ecological services of forests was 3.05 times as economic value of forests in Qinghai,which indicated that the ecological effect of forests was much more obvious.The total value of each arboreal forest ecosystem services had close relation with its total volume(R2 = 0.744,P<0.001),and had positive correlation between them.It is important to simplify the procedure of estimating the value of ecosystem commonweal.