根据郑州市2009年航片与1990年郑州市地形图、2005年土地利用图,结合2007年郑州市绿地普查数据及2009年8月份的野外调查数据,选取景观多样性指数、景现优势度指数、景观均匀度指数、景观丰富度指数、景观距离指数、景观破碎化指数、shannon-wiener多样性、丰富度、pielou均匀度、优势度等指标对贾鲁河郑州段的景观格局及植物多样性梯度变化进行了研究.结果表明,城市的发展从一定程度上导致了依赖于耕地、林地、河流等景观的生态系统的减少,景观多样性由大到小的顺序为下游河流区、上游近郊区、上游远郊区、城市河流区;景观距离指数及破碎化指数顺序表明城市河流区与下游河流区的生境的景观破碎化程度与人类干扰的程度关系密切,明显高于郊区河流区；城市河流区植物多样性和丰富度最高,而上游远郊区的优势度最高.并根据研究结果提出了贾鲁河郑州段的优化措施.%A study was performed to analyze the gradient changes of landscape pattern and plant diversity of Jialu River in Zhengzhou according to the aerial photographs of 2009, topographic maps of 1990, land use maps of 2005, vegetation census data of 2007 as well as data in field survey data in August 2009. Shannon-Wiener diversity index, dominance index, Pielou's evenness index, richness index, landscape distance index, and fragmentation index were used to analyze the changes of landscape pattern and plant diversity. Results show that urban development has led to the area reduction of arable land, woodland, and rivers. Landscape diversity index of downstream area is the highest, followed by upstream suburban area, upstream exurban area, and urban river area. Landscape distance index and fragmentation index indicate that the extent of landscape fragmentation of urban river area and downstream area is closely related to the degree of human disturbance, which is significantly higher than that of the suburban river area. The highest plant diversity and richness were observed in urban river area, while the highest dominance index in upstream suburb area. Some optimized measures for the management of Jialu River in Zhengzhou were proposed.
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