黄河调水调沙期河口湿地景观格局演变

The Evolution of Wetland Landscape Pattern of the Yellow River Estuary During Water and Sediment Regulation

以2003—2010年遥感影像为基本信息源,在3S技术支持下,运用景观生态学原理,定量分析调水调沙以来黄河口自然保护区湿地景观格局的动态变化,讨论了影响湿地景观格局变化的驱动因素。研究结果表明:自调水调沙以来,保护区内景观类型分布特征发生明显变化,湿地生态系统呈明显的正向演替趋势;自然保护区景观类型多样性与异质性增加,景观形状复杂程度提高,斑块细化程度提高,景观破碎化非常微弱,景观格局生态状况总体上有较大提高;湿地生态补水工程与黄河水资源补给增加是促进景观格局发展的主要影响因素。

The landscape pattern of national nature reserve on the Yellow River estuary and its dynamic change since water and sediment regulation were analyzed quantitatively using 3S technology and Landsat TM images from 2003 to 2010.The driving forces of wetland landscape pattern change were also discussed.The research results indicate that the distribution of landscape type is changed obviously with the positive succession of wetland ecosystem.Since 2003,the landscape diversity and heterogeneity,the landscape shape complexity,the landscape separation have increased.In addition,the patch fragmentation is also negligible which implies the ecological condition of wetland landscape has improved gradually.The wetland ecological water supplement project and the increase of river replenishment during water and sediment regulation are recognized as the principle driving forces for landscape pattern development.