城市可持续发展的关键自然资本研究

城市是社会、经济与环境相互作用最为集中与深刻的区域，随着城市环境问题的日益严重，城市可持续发展成为共同关注的焦点。自然资本在可持续发展体系中起到关键的作用，因此，识别城市系统的关键自然资本是实现城市可持续发展的前提。通过分析城市绿色空间的生态服务功能，结果表明绿色空间是影响城市可持续发展的重要的自然资本。在此基础上，提出了通过保护与投资于绿色空间两种途径实现城市可持续发展的措施与建议。

Green Space: Critical Natural Capital of Urban Sustainable Development

Cities are the regions which have the most intense interaction among social,economy,and environment.Along with more and more urban environmental problems,people pay more and more attentions to the urban sustainable development.Critical natural capital has especial characters such as essentiality,irreplaceability,and irreversibility,which play important roles in the sustainable developmental system.So identifying urban critical natural capital is the precondition of achieving urban sustainable development.Based on an overview of former researches,we find that urban green space has many essential ecological functions such as food supplying,wood and fiber provisioning,air purifying,noise abating,microclimate regulating,nutrient cycling,biodiversity maintaining,and some social-cultural services,which are classified into four groups(source function,sink function,life support function,human health and welfare function).The analysis of ecosystem service and characters of urban green space identifies that urban green space is an important natural capital to urban sustainable development.Finally,some operable suggestions are made to ecosystem service conservation and enhancing of green space for urban sustainable development.