基于生态系统服务簇的小尺度区域生态用地功能分类——以重庆两江新区为例

Function classification of ecological land in a small area based on ecosystem service bundles: a case study in Liangjiang New Area,China

生态用地功能分类是其生态价值评估及管理的基础,与生态系统服务的权衡和协同关系联系密切;对小尺度区域进行生态用地功能分类研究有助于实现精细化生态资源管理。以重庆两江新区为例,选取该区8种重要的生态系统服务,兼顾生态与社会成分,基于层次聚类法得到6类生态系统服务簇,依据提供重要生态系统服务和维护关键生态过程的原则,对其重要性等级进行了划分;依据生态系统服务簇与土地利用类型之间的关联关系,将生态用地定义为提供重要生态系统服务、维护关键生态过程或生态脆弱的用地空间,并按重要性将其划分为3个等级。研究结果表明,基于生态系统服务簇的生态用地分类框架不仅能够最大限度涵盖生态用地的功能属性,而且能够在空间上量化不同生态系统服务的相对比例,有助于对用地类型与生态功能之间的对应关系形成深入系统的认识,也可为精细化生态管理提供参考。

Evaluation and management of ecological land（ EL） are based on its proper function classification,which links closely with ecosystem service tradeoffs and synergies. The study of EL function classification in a small area may be a useful tool for improving the management of natural resource. In this study,we quantified 8 ecosystem services（ ES）,both ecological and social ones,in Liangjiang New Area,Chongqing,China. Based on the ES data,we identified 6 ecosystem service bundles based on hierarchical clustering analysis,and classified the bundles into 3 levels based on their relationship with key ecological processes and the importance of their service supply. Finally,we discussed the relationship between ecosystem service bundles and land use type,based on which we summarized the concept of EL and classified the land use type into 3 different levels of EL. The results showed that the function classification framework of EL based on ecosystem service bundles can express functional properties more comprehensively,as well as spatially quantify the relative proportions between different ecosystem services,which gives us a deeper understanding of the relationship between EL functions and land use types in small areas and provide guidelines for better ecosystem management.