深圳内伶仃岛薇甘菊危害的生态经济损失分析

Analysis of Ecological-economic Loss Caused by Weed Mikania micrantha on Neilingding Island, Shenzhen, China

摘要:

通过对广东深圳内伶仃岛薇甘菊侵入危害较严重的地段进行随机抽样及全面调查,运用生态经济学理论及市场价值法、影子工程法、机会成本法和替代花费法等,对内伶仃岛上薇甘菊危害的生态经济损失作出了一个初步的评估。薇甘菊入侵造成内伶仃岛上森林生态系统服务功能如涵养水源、固定CO₂、生产氧气、净化大气,减少污染、减少病虫害,卫生保健等方面的经济损失为383.49-862.86万元人民币。生物多样性损失为每年66.80-150.31万元人民币。估计全岛年损失近450.29-1013.17万元人民币。

Abstract:

In the investigation of vegetation with invasive weed Mikania micrantha, 81 sample plots with10 m×10 m each were used to study the plant species, breast height diameter, crown diameter, slope and aspect, and the importance value of each species. The corresponding data obtained from original or secondary forest vegetation were used for comparison. Ecological-economic loss was analysed by methods of market valuations, shadow engineering, opportunity cost, and substitute expense. It is estimated that the economic loss amounts to 4.5-10.13 million yuan for the whole island.