福建省森林生态系统服务价值的变化

参照Constazaetal提出的测算方法,在根据单位面积蓄积量进行修正的基础上,评估了1978-1998年福建省森林生态系统服务价值变化.结果表明,1978-1998年福建省森林生态系统服务价值逐渐上升,平均每年提供89.29×108美元的生态服务价值.其中营养循环价值在各年度中所占比例最高,平均占41.00%,且逐渐上升,森林的三大效益中生态效益明显,且增长幅度较大.受各林种分布广度(面积)和单位面积生态服务功能强弱的综合影响,各林种生态服务价值贡献率差异较大,其中用材林贡献率最大,并呈上升趋势,但其单位面积服务价值呈下降趋势.阔叶林生态服务价值贡献率明显高于马尾松林和杉木林,但呈下降趋势.

The dynamics of forest ecosystem service values in Fujian Province

According to the method proposed by Costanza et al.(1997), the dynamics of forest ecosystem services in Fujian Province was studied in terms of its amount of growing stock of unit area from 1978 to 1998. The results showed that the value of forest ecosystem services in Fujian Province was increasing gradually from 1978 to 1998 with the average of 89.29×10~8 USD per year. The value of nutrient cycling accounted for the highest proportion of the service value and was estimated to be 41.00% averagely. Among the ecological, economic and social benefit of forests, ecological benefit had obvious and higher extent of increasing. Owing to the integrated effects of different categories of forest distribution and ecosystem function of unit area, contribution ratios of the ecosystem services of various categories of forest were greatly different. The contribution ratio of the commercial forest accounted for the highest proportion with upward trend, but its value of ecosystem services of unit area presented declining trend. The contribution ratio of broad-leaf forest was higher than that of the forest of Pinus.massoniana and Cunninghamia lanceolata with declining trend.