庙岛群岛海岸带农田生态系统服务价值的评估

利用生态学和经济学统计方法分析了1950—2000年庙岛群岛海岸带农田生态系统服务价值的演替变化．各乡镇耕地面积在1950年代达到最大值，尔后随退耕还林逐渐减少．南、北长山和黑山及整个群岛在1950—1990年农田生态系统总服务价值基本呈增长趋势，尔后迅速降低；而砣矾、钦岛和隍城的农田生态系统总服务价值逐年降低．1950—2000年，庙岛群岛年平均农田生态系统的总服务价值为655．49万元，平均0．5961万元／hm^2,6个乡镇农田生态系统服务价值依次为：南长山〉北长山〉黑山〉砣矶〉钦岛〉隍城,在农田生态系统功能的服务价值中，生态环境服务价值占近70％，农产品服务价值仅占约30％．

Evaluation on Ecosystem Service Values of Farmlands in Coastal Zone of Miaodao Archipelago

The successive variation in ecosystem service value of farmland in Miaodao archipelago from 1950 to 2000 is analyzed by using ecological and economics methods. The area of farmland in the townships roached maximum in 1950, and then reduced yearly with the conversion of farmland to forestry. From 1950 to 1990 the total ecosystem service value of farmland in Nanchangshan, Beichangshan, Heishan and the whole archipelago increased, then declined sharply; while that in Tuiji, Qindao and Huangcheng tended declining year by year. In the period from 1950 to 2000, the mean annual value of farmland ecosystem service on coastal zone of Miaodao archipelago accounted for 6. 5549 million Yuan, 5961 Yuan/hm^2. Among 6 townships Nanchangshan yielded the highest value in the farmland ecosy;tem service, the rest townships in sequence were Beiehangshan, Heishan, Tuoji, Qindao and Huangcheng. In the farmland ecosystem services, the ecological and environmental service accounted for 70%, the service of agricultural products only covered about 30%.