Abstract: In this paper,the wetland landscape of Liaohe delta is studied with remote sensing and GIS and six approaches are used to analyze its fragmentation.The results show that this area is lightly fragmented,the patch density of landcapes is 0.286 individual·km^-2,the corridor density is 1.098 km·km^-2 and the aggregation index of various landscapes is 0.955.Landscape fragmentation is closely related to human activites,and the fragmentation level is increased with increasing human activities on the landscapes.The expansion of corridors is the premise and impetus of landscape fragmentation.

Key words: Landscape ecology, Landscape fragmentation, Corridor, Wetland, ecological migrant settlement, stakeholders, risk identification, ecological risk