The research on ecological safety

especially that of regional land use/cover is a hot issue

which is of great significance to the protection of regional ecological environment and the sustainable development. This paper

using TM images in 1980

2000

2010 as the data source

developed a comprehensive index method to evaluate the ecological security of land use

analyzed the temporal and spatial variation of the ecological security in Songnen Plain during 1980 to 2010

and predicted the ecological security pattern in the next 40 years. The results showed that: (1) The risk of ecological security in land use increased from the northeast to the southwest. (2) The lower risk area proportion is the largest

accounting for more than 50%. From 1980 to 2000

the other risk areas were reduced and transformed to lower risk area. This indicated that ecological environment pressure has been decreased. However

from 2000 to 2010

The conversion of low and lower risk areas to higher risk areas is obvious. (3) The prediction showed that during the period from 2020 to 2050

the area of moderate risk

high risk

and higher risk levels will increase gradually

and the ecological environment will deteriorate seriously.