广州市萝岗区生态系统服务功能价值空间评估

基于遥感与GIS,选取生产有机物质、涵养水源、净化环境污染、气体调节、营养物质循环、保土育肥6项生态系统服务功能主要指标,计算得到的各项量化的生态服务功能效益,通过影子工程法、市场价值法和机会成本法等转换成生态系统服务价值,在小空间格网上对广州市萝岗区生态系统服务功能价值进行了定量评估和空间分析。结果表明：萝岗区2007年生态系统服务价值达到16.13亿元,平均为37 175.81元/hm2。从空间分布看：萝岗区北部农林地区生态服务价值最高,中部、东部山区的服务价值较高,南部工业地区服务价值较低。不同的生态景观具有不同的生态服务功能,保持生态景观的多样性和均衡性能促进生态系统服务价值的增加。萝岗区生态城建设要保护该区原生的自然生态景观特征和景观格局,促进区域生态服务功能的全面提升和生态服务价值总体增加。

Spatial Valuation of Ecosystem Services in Luogang District, Guangzhou

Selecting six key indexes of ecosystem services, including the production of organic matter, conserving water, pollution cleaning, air regulation, nutrient recycling, soil conservation and fattening and the quantifiable benefit of the indexes were calculated into the value of ecosystem services through the shadow project method, the market value method and the opportunity cost method, etc.. The ecosystem service value of Luogang District and its spatial distribution patterns were comprehensively and quantitatively evaluated in a small spatial grid based on remote sensing and GIS technology. The results showed that the ecosystem service value of Luogang District reached 1. 613 billion Yuan in 2007 with an average value of 37,175.81 Yuan/hm2. The spatial distribution features of the ecosystem service value of Luogang District showed that the forestry and agriculture areas in the north of Luogang District had the highest ecosystem service value, central and eastern mountainous areas had higher value, and southern industrial regions showed the lowest value. The analyzing results showed that different ecological landscapes with different ecosystem service value. Maintaining diversity and balance of the ecological landscapes were bound to promote the increase in the ecosystem service value. Thus, it was necessary to protect the native landscape features and landscape patterns of regional nature ecology and to promote regional ecosystem services as well as the total value for building ecological city in Luogang District.