Abstract: Shengjin Lake wetland was located in the middle and lower reaches of the Yangtze River in Anhui Province. It was one of the important areas for wintering cranes and the changes of wetland landscape influence the habitat quality of wintering cranes. It was of great significance to study the wetland ecological restoration in wetland. With the rise of Shengjin Lake National Nature Reserve as the research object, ERDAS software was used to divide TM image into 8 landscape types in 8 years in winter from 1986 to 2015. The landscape indexes of each year were calculated by using FRAGSTATS software. Disturbance degree, food richness, vegetation cover and hydrological condition, were selected as the main factors affecting wintering habitat of cranes. A habitat suitability index model for wintering cranes was established and the habitat suitability assessment maps for cranes were generated by ARCGIS. The results show that the change of landscape pattern in Shengjin Lake protected area was obvious, the number of wetland patches increased, the fragmentation degree of landscape increased, the landscape patch difference became smaller, and the diversity index and evenness index increased gradually. The habitat suitability index of wintering cranes decreased from 0.845 to 0.465, and the overall habitat deteriorated significantly. The habitat suitability of wintering cranes fell from 13 577.11 hectares in 1986 to 7 424.42 hectares in 2015.From 1986 to 2015, the number of wintering cranes decreased.
Key words： habitat impact factors；habitat suitability evaluation model； winter cranes ；landscape