Visualization Study of Land Use and Ecosystem Services in the Last Two Decades —A Knowledge Graph Analysis Based on CiteSpace

气候变化和人类活动强度的增加，对生态系统服务构成了一定的压力和影响。最主要的压力因素是土地利用的变化。文章以中国知网近二十年发表的核心论文为数据源，采用CiteSpace6.3.R1版本进行了知识图谱与文献计量分析，从发文量、发文机构、研究团队、关键词进行了知识图谱的运算和可视化。研究得出该领域目前研究的热点、主要的研究团队和未来的研究趋势。一是多区域土地利用动态变化所引起的生态服务价值的变化。二是基于不同目标下的多情景土地利用变化预测以及由此导致生态服务价值的变化。三是生态系统服务内部的协同和权衡变化。土地利用变化会引起区域生态格局的变化，进而影响生态系统服务及其价值的变化，研究对优化区域生态系统服务与集成，对区域生态系统管理、可持续发展具有重要的现实意义。Climate change and the increasing intensity of human activities have exerted certain pressures and impacts on ecosystem services. The main stressor is land use change. Based on the core papers published by CNKI in the past two decades, this paper uses CiteSpace6.3.R1 version to conduct knowledge graph and bibliometric analysis. The calculation and visualization of knowledge graph are carried out in terms of the number of published papers, publishing institutions, research teams and keywords. The current research hotspots, main research teams and future research trends in this field are obtained. The first is the change of ecological service value caused by multi-regional land use dynamic change. The second is multi-scenario land use change prediction based on different objectives and the resulting changes in the value of ecological services. Third, the synergy and tradeoff change within ecosystem services. Land use change will cause the change of regional ecological pattern, and then affect the change of ecosystem services and their value. The research has important practical significance for optimizing regional ecosystem services and integration, and for regional ecosystem management and sustainable development.