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《Journal of Arid Land Resources and Environment》 2016-01
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Changes of landscape pattern ecological security during 1999-2013 in Minqin oasis

ZHANG Hengwei;ZHOU Junju;WANG Lanying;College of Geographic and Environmental Sciences,Northwest Normal University;  
Based on the TM image of Minqin oasis in 1999 and 2013,we used GIS technique to achieve the spatial neighboring length and number between oasis types and desert or Salina- marsh in the Minqin Oasis; and the threatening degree of oasis ecological security was discussed. The results indicated that:( 1) The desertification on farm lands was the most significant in 1999,while the threat on the woodland was the most severe in 2013.The threats on residential areas were minor both in 1999 and 2013 and remained the same during the study period of 14 years. From the point of change trend,cultivated land patches of potential desertification threat was in decrease,and the forest land,grassland desertification degree of the potential threat were increased,the inhabitants were the same.( 2) Compared with 1999,the threat of potential salinization degree for farmland by 2013 hah not changed,but farmland was also affected by the salt alkalization,and the degree was the biggest in all patch types; the other patch types by the threat of salinization degree all showed decrease trends.( 3) On the level of oasis,the landscape threatened by desertification in Minqin oasis was increased,and that threatened by salinity was decreased.
【Fund】: 甘肃省自然科学基金(1107RJZA104);; 西北师范大学青年教师科研能力提升计划项目(NWNU-LKQN-12-18);; 国家自然科学基金项目(41261104);; 国家社科基金青年项目(12CTJ001);; 甘肃省青年科技基金计划项目(1107RJYA077)资助
【CateGory Index】: P901
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