【摘要】 随着城镇化进程的加快,城市景观格局发生巨大变化,进而引起城市生态系统过程和结构变化,降低了生态系统功能的发挥和服务供给。然而,目前关于城市景观格局与生态系统服务的时空变化关系的定量研究较为缺乏。本文以成都市为研究区,利用景观指数分析、InVEST模型和皮尔逊相关分析等方法,分析2000—2015年土地利用中景观格局、生态系统服务时空变化特征,并使用地理探测器模型甄别两者之间的关系。结果表明:(1)研究期内建设用地、林地面积呈增加趋势,耕地和草地面积呈减小趋势。土地利用类型主要是在耕地、草地、建设用地和林地之间转移。(2)成都市整体景观的破碎度和异质性增强。(3)生态系统服务中,碳固存、作物产量、产水量和生境质量呈减少趋势,水土保持呈增加趋势。产水量自西向东呈"龙门山区—成都平原—龙泉山区—西部丘陵区"梯度式变化。多重生态系统服务景观指数整体上呈增长趋势,这可能与生态系统服务间以协同关系为主、权衡关系为辅有关。(4)城市生态系统服务受城市景观格局的显著影响,是城市景观对生态系统多维度综合作用的表征。本研究结果可为成都市的规划和生态建设工作提供科学有效的支撑,对深入城市景观生态学研究、指导城市空间规划具有实践意义。更多还原

【Abstract】 With city urbanization, landscape pattern is tremendous changing, resulting in significant changes in urban ecosystem process and structure, along with reduction in the effective use of ecosystem functions and supply of ecosystem services. Studies on the spatiotemporally varying relationship between urban landscape patterns and ecosystem services are lacking; thus, it is important to conduct relevant studies focusing on the urban landscape ecology and future urban spatial planning. In this study, Chengdu city, China was used as a case study. The investigation aimed at analyzing the spatiotemporal changes in landscape patterns and ecosystem services using landscape pattern index analysis and ecosystem service models to analyze the data collected from 2000 to 2015 in the urban region. In addition, based on Pearson’s correlation coefficient and Geodetector model, the tradeoffs and synergies between the ecosystem services and the spatiotemporally varying relationship between landscape patterns and ecosystem services in the urban region, from 2000 to 2015, were investigated. The key results are as follows:(1) During the study period, there was an increasing in the areas of construction and forest showed trend, whereas a decreasing tendency in cultivated areas and grassland. The transfer of land use types occurred mainly between cultivated areas, grassland, construction areas, and forest;(2) In the sight of selected landscape indexes, the fragmentation and heterogeneity of the overall landscape pattern of Chengdu showed a growing tendency;(3) From the perspective of ecosystem services, carbon sequestration, crop yield, and production, the water volume and habitat quality tended to decline, while soil and water conservation were upward. There were stepped increases in water conservations from west to east, in the direction of "the Longmen Mountains-the Chengdu Plain-the Longquan Mountains-the western hilly area of Chengdu". Estimated multiple ecosystem service landscape was on the rise possibly because of synergy relationship between ecosystem services;(4) Urban landscape pattern had a significant impact on the ecosystem services and affected urban ecosystem services through multiple dimensions of the landscape pattern. These results can provide scientific and effective support for the planning and ecological construction in Chengdu.更多还原