广西合浦海草床生态系统服务功能价值评估

Seagrass Bed Ecosystem Service Value——A Case Study on the Hepu Seagrass Bed in Guangxi Province

海草床生态系统是生物多样性丰富和生产力高的近岸海洋生态系统,本文以广西合浦海草床为例,结合实地调查、已有的研究成果和当地统计资料,综合运用生态经济学、资源经济学等基本理论和方法,对该地区海草生态系统的服务功能进行了价值评估。结果表明2005年该地区海草生态系统的服务功能价值为6.29×105元/a·hm2,其中间接利用价值最大,为4.47×105元/a·hm2,占总经济价值的70.97%;其次为非利用价值,为1.54×105元/a·hm2,占总经济价值的24.52%;最少的是直接利用价值为2.84×104元/a·hm2,仅占总经济价值的4.51%。

Seagrass bed ecosystem is a coastal ecosystem with abundant biodiversity and high production. It is also a very important system for the sustainable development of human society and economy. Based on local research, statistical data and prevenient research result, the main service of Hepu seagrass ecosystem is analyzed in the paper, including fishing production, nutrient cycling, scientific research, protecting the coast from eroding, climate regulation, biodiversity, cultural, bequest value, option value and existence values et al. At the same time, we use ecological and economic methods for economic value evaluation of seagrass in Hepu of South China, including the market valuation method, contingent valuation method, carbon and tax method, benefit transfer method and expert survey method. The results show that the total value of the Hepu seagrass ecosystem service is about 6.29×105 Yuan RMB/hm^2 in 2005. Among these services, the indirect use value is the main aspect, which was 4.47×10^5 Yuan RMB/hm^2 in 2005, accounting for 70.97 % of the total value. The non-use value was 1.54×10^5 Yuan RMB/hm^2 in 2005, accounting for 24.52 % of the total value. The direct use value is the least, which was only 2.84× 10^4 Yuan RMB/hm^2 in 2005, accounting for only 4.51% of the total value.