The loss and fragmentation of natural spaces in rapidly urbanized areas have greatly reduced their capacity to provide multiple ecosystem services (ESs). It is of great importance to identify natural spaces with key ecological functions, which are used to construct effective and efficient ecological networks, especially in urbanized areas where natural spaces are limited. This paper individually evaluated five key ESs provided by natural spaces in the Su-Jia-Hu area. By constructing an evaluation model coupling individual ESs, the multi-ecosystem service capacity index (MESC index) of each natural space was calculated. The index evaluation results showed that the overall level of ES supply was the highest in the two types of natural space, which were lakes and forests. The results of the clustering analysis on this basis showed that the natural space priority could be divided into six grades: the first grade was the large ecological conservation area, the second and third grades were the important ecological hubs, and the fourth, fifth and sixth grades were the potential stepping stones and structural corridors. The method based on the MESC index evaluation proposed here provided a scientific and repeatable framework for the identification and management of important natural spaces in ecological network planning and useful reference information for planners and decision makers.

快速城市化地区自然空间的丧失和破碎化大大降低了其提供多种生态系统服务的能力。确定具有关键生态功能的自然空间，特别是在自然空间有限的城市化地区，被用于构建有效和高效的生态网络，这一点至关重要。本文分别评估了苏家湖地区自然空间提供的五个主要生态系统。通过构建耦合各个ES的评估模型，计算了每个自然空间的多生态系统服务能力指数（MESC指数）。指数评估结果表明，在湖泊和森林这两种自然空间中，ES供应的总体水平最高。在此基础上的聚类分析结果表明，自然空间优先级可分为六个等级：第一等级为大的生态保护区，第二和第三等级为重要的生态枢纽，第四，第五和第六等级等级是潜在的垫脚石和结构走廊。本文提出的基于MESC指数评估的方法为生态网络规划中重要自然空间的识别和管理提供了科学且可重复的框架，并为规划者和决策者提供了有用的参考信息。五年级和六年级是潜在的垫脚石和结构性走廊。本文提出的基于MESC指数评估的方法为生态网络规划中重要自然空间的识别和管理提供了科学且可重复的框架，并为规划者和决策者提供了有用的参考信息。五年级和六年级是潜在的垫脚石和结构性走廊。本文提出的基于MESC指数评估的方法为生态网络规划中重要自然空间的识别和管理提供了科学且可重复的框架，并为规划者和决策者提供了有用的参考信息。