Abstract: Based on the 1987, 1997, and 2007 distribution maps of wetland landscape in coastal zone of Yancheng, and with the support of GIS technology, the temporal changes of Grus japonensis suitable wintering habitat in the zone were analyzed, taking the food richness, water resources, shelter condition, human activities, least-patch area, and distance of daily activities as the assessment factors of habitat suitability, and the habitat evaluation model as the assessment procedure. In 1987-2007, due to the great changes of habitat type and the landscape fragmentation, the total area of wetlands in the zone reduced by 27.6%, and the habitat quality suitable for G. japonensis declined significantly. The habitat area condition suitable for G. japonensis reduced from 2354.36 km² in 1987 to 1100.13 km² in 2007, accounting for 51.6% and 24.1% of the total habitat area, respectively. With increasing human disturbance and wetland landscape fragmentation, the proportion of suitable habitat for G. japonensis decreased from 28.2% in 1987 to 13.5% in 2007, and its area decreased from 1286.05 km² to 614.95 km².

Key words: Didesmococcus koreanus Borchs, Chilocorus rubidus Hope, Spatial pattern, Geostatistics