Temporal and Spatial Transformation of Land Use and Its Eco-environmental Response in Changchun
Land use transition is an important factor affecting ecological environment change.High-resolution land use data is selected from 2001,2011 and 2021 in Changchun.Firstly,land use transfer matrix and dynamic attitude of land use are used to analyze temporal and spatial changes of land use pattern.Based on ecological environment quality index and ecological contribution rate index,the response of ecological environment to land use transformation in Changchun is explored.The results show that:① Cultivated land and construction land are the core land use types required for the development of Changchun from 2001 to 2021.The cultivated land area increases first and then decreases,accounting for more than 75%of the total area,and the construction land area continues to grow.The grassland,water area and unused land area showed a decreasing trend to different degrees.The forest land maintained its ecological stability and changed little.The conversion among land types was most obvious in cultivated land and grassland.② In the past 20 years,the range of low-quality areas in central urban areas has gradually expanded,while that in sub-central urban areas has slightly decreased.From 2011 to 2021,the decline rate of ecological environment quality in Changchun slowed down compared with that in 2001 to 2011.The area of ecological environment improvement increased,but the overall ecological environment quality changed little.③ From 2001 to 2021,part of grassland in Changchun was deserted and water area was destroyed,resulting in severe ecological problems.Although the implementation of national ecological policies such as returning farmland to forest or grassland has improved the quality of urban ecological environment,the deterioration trend is still higher than the improvement trend.The research results can provide scientific basis for the optimization of land spatial pattern and the improvement of ecological environment in Changchun.
land use transformationland use dynamic degreeeco-environmental response
国家科技期刊平台
NSTL
万方数据
维普
