| 生物土壤与生态 |
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| Ecosystem Construction Effects in Southern and Northern Mountains of Lanzhou by Remote Sensing Monitoring |
| DUAN Han-chen1,2, YAN Chang-zhen1, MA Ru-lan3, PANG Guo-jin3, JIANG Xiao-rong3 |
| 1.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3.College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China |
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Abstract Based on the Landsat ETM+ images in 1999, Landsat TM in 2005 and Environment and Disaster Monitoring Small Satellite images in 2009, the land use data of the three periods in southern and northern mountains of Lanzhou were extracted. The variations of land use and landscape pattern in southern and northern mountains of Lanzhou during 1999—2009 were analyzed based on the land use data and GIS analysis, landscape indices calculation and mathematical statistics. The results showed that, in the past 10 years, forest and residential lands increased obviously, grass land and farm land decreased; Landscape pattern tended to fragmentation, landscape diversity increased, and landscape structure tended to diversity and homogenization. The analysis of driving forces showed that the human activity and policies were the main affecting factors which led to changes of land use and landscape pattern.
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Received: 14 August 2010
Published: 20 March 2011
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2011, Vol. 31 
