Song Chuangye^1,2 , Liu Gaohuan¹

(1 Institute of geographic science and nature resource research, Chinese Academy of Sciences, Beijing 100101,China)
(2 Graduated School of Chinese Academy of Sciences, Beijing 100039, China)

Abstract: Regional vegetation pattern dynamics has great impact on the climate change and even global change. In this study, the Yellow River Delta was selected as the study area. By using 1986, 1993, 1996, 1999 and 2005 remote sensing data as basic information resource and with the support of GIS, a wetland vegetation spatial information dataset is built up. Through selecting the indices such as class percent of landscape (PL), number of patch (NP), largest patch index (LPI), mean patch size (MPS) and area weighted mean shape index (AWMSI) etc., the dynamic of wetland vegetation pattern is analyzed. The result shows that the change of wetland vegetation pattern is significant from 1986 to 2005, and the wetland vegetation pattern tends to be fragmental. The decrease of vegetation areas may well be explained by the fact that the nature environment evolution (River channel migration and climate change) and the increase of the population in the Yellow River Delta.

Key words:Yellow River delta; Vegetation pattern; Remote sensing imagery; GIS Analysis