福建东山岛防护林景观格局与生态价值研究

运用景观生态学原理和森林环境价值计量方法,对东山岛防护林景观格局与生态价值进行研究。首先选取斑块密度、边缘密度、分维数、景观多样性、景观优势度和均匀度指数等指标,分析东山岛防护林景观的空间分布和空间格局特征,并从中小尺度的防护林生态系统及其重要生态服务功能角度出发,运用市场价值法、造林成本法、生产成本法、影子工程法等方法进行生态价值评估。结果表明人类活动对东山岛防护林的景观格局产生很大影响,得出东山岛防护林生态系统固定CO₂、释放O₂及防风固沙服务功能的平均价值为39.45×10⁶～92.55×10⁶元。

Study on landscape pattern and ecological value of shelter forest in Dongshan Island of Fujian Province

The authors study landscape pattern and ecological value of shelter forests in Dongshan Island by landscape ecological theory and quantitative valuation method of forest environmental value. Some landscape indicators including patch density, edge density, fractal dimension of patches, landscape diversity, landscape dominance and Shannon's evenness index were selected to analyze the spatial distribution and spatial pattern feature of shelter forest landscape types in Dongshan Island. The service function of the forest ecosystem was evaluated using market valuation method etc. from the viewpoints of small scale shelter forest ecosystem and important ecological service function. Results showed that landscape pattern of shelter forests in Dongshan Island was greatly affected by human activities, and that averaged value of service function of shelter forests in Dongshan Island adds up to 39.45×10~6-92.55×10~6 yuan in terms of CO_2 fixation, O_2 release, wind protection and sand stabilization.