城市绿地多种生态服务功能时空变异及关键景观驱动因素

The rapid urbanizations have led to the structural and functional degradation of green space, which was recognized as an important challenge to urban sustainable development. The landscape decision-making of green space that integrates tradeoffs of patterns and multiple ecosystem services is a promised strategy to meet the question. Therefore, it is critical to understand the dynamics of ecosystem services of green space and its driving factors across a rapidly urbanizing landscape. Currently, the spatiotemporal dynamics and its driving mechanisms are still not clearly. In this research, the ecosystem services of green space in Wuhan, China during the past twenty years, will be evaluated and mapped based on an integrated applications of field investigations and geotechnologies. We will model the spatiotemporal dynamics of multiple ecosystem services of green space and their relationships, and explore their driving factorss in landscape configuration. This research can reveal the spatiotemporal variations of multiple ecosystem services of green space, the dynamics characteristics of the relationships among multiple ecosystem services, as well as the probable spatial driving factors across landscape. The results will supply a critical and theoretical support for the researches on tradeoffs of multiple ecosystem services of green spaces and land use decision-makings in rapidly urbanizing environments.

快速城市化导致的城市绿地景观结构和生态服务功能退化是城市可持续发展面临的重要问题。理解城市绿地景观结构功能对快速城市化响应规律及其景观驱动因素是制定有效绿地景观规划对策的重要基础和当前城市生态学研究的热点.但目前,城市化背景下绿地多种生态服务功能的时空变异规律及其景观驱动规律仍不明确。本项目拟以武汉市为例,运用实地调查、遥感和GIS空间建模分析相结合的方法，通过对近20a武汉市城市绿地多种生态服务功能的评估和制图分析，探索城市绿地多种生态系统服务功能的时间、空间和类型关系的变化规律及城市化主导下的关键景观驱动因素。通过本项目研究，可揭示城市化背景下城市绿地生态服务功能的时空变异规律、多种生态服务功能关系的时空变异特征、绿地生态服务功能变化的关键景观驱动因素。研究结果可为城市绿地生态服务功能优化和多功能绿地景观规划决策研究提供基础理论支持。

城市化背景下绿地生态服务功能的时空变化规律和生态服务功能之间的相互关系是开展城市绿地规划管理的理论基础。为阐明这一科学问题，本项目以湖北省武汉市为例，运用多源时序遥感数据和野外调查数据，基于GIS和相关生态学模型方法，开展了城市绿地生态服务功能评估与制图分析、城市绿地多种生态服务功能在时间空间和类型关系上的变异规律、城市绿地多种生态服务功能变化的关键景观驱动因素等研究，并探索了面向生态服务功能提升的城市森林生态网络构建策略。项目执行期间取得的主要成果包括：构建了城市绿地典型生态服务功能评估指标体系和制图方法，揭示了城市绿地典型生态服务功能在时间、空间和类型关系上的变化规律，探索了关键景观驱动因素；构建了以景观阻力为基础的城市森林景观连接度指标，揭示了城市森林景观连接度的时空变化规律；比较了城市居民对不同类型公园绿地生态服务功能偏好和支付意愿差异，揭示了城市居民对公园绿地的利用规律；构建了面向多样性保育功能提升的城市森林生态网络规划模型。上述研究结果可为城市绿地规划管理提供理论依据。