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《Research of Soil and Water Conservation》 2016-03
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Analysis of Ecological Security of Landscape Pattern in Manas River Watershed of Xinjiang Uygur Autonomous Region

LIANG Ermin;ZHANG Junmin;College of Sciences,Shihezi University;  
Landscape is a form of the spatial heterogeneity based on resource factors,environmental factors and ecological process,the change of its pattern comprehensively reflects the various ecological relationship and its steady state.Based on the Erdas 9.0and the ArcGIS 10.0,using three periods of Landsat TM data at the same time,the principle of the landscape pattern index and spatial analysis methods,we set up ecological security index,and quantitatively evaluated the changes of ecological security status according to the isolation,fragmentation as ecological security index in Xinjiang Manas River Basin in recent 10 years.The results show that:(1)nearly a decade the overall ecological security index of landscape pattern dropped from 0.362 to 0.354 and then rose slightly to 0.359,it first changed to deterioration then became better with the V-shape,illustrating the development of the western region caused a new ecological security problems since2000,the 2005 implementation of water-saving irrigation and returning farmland to grassland and other projects led to a obvious ecological management result;(2)the interference degree of grass dropped from 0.234 to 0.239,the unused land fell from 0.344 to 0.300,construction land fell from 1.316 to 0.877,the ecological security degree had increased;interference degree of woodland rose from 0.483 to 0.682,the water body rose from0.413 to 0.450,cultivated land rose from 0.242 to 0.258,ecological security degree had fallen markedly;(3)more than 50% of the study area was in the serious area,and the area of serious area was increasing,the safety area accounted for about 20% of study area,the area was small,but increasingly growing;the warning areas in the study area had dropped from 24.96% to 10.10%,the trend of reducing was obvious,illustrating that the ecological environment of Manas River Basin trended to the slight deterioration.
【Fund】: 国家自然科学基金“玛纳斯河流域绿洲经济—生态景观空间分异机理研究”(41361025)
【CateGory Index】: P901
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