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| Dynamic Variation of Landscape Pattern of Desertification Area in Hexi Corridor |
| Wang Hui1,Xu Xianghong1,Xu Danghui2,Chen Xiangshun3 |
| 1.Collage of Forest, Gansu Agriculture University, 73000;2.State Key Laboratory of Arid Agroecology, Lanzhou University, 730000;3.Forestry Investigating and Designing Institute, 730020, Lanzhou, China |
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Abstract Based on the investigation data of desertified land in 1996 and TM images of Hexi corridor, Gansu province, landscape pattern dynamic variations of desertifiied land were studied by the landscape indices. The results shows that in the past 40 years the landscape pattern of desertification land has changed constantly. The area of unavailable land, drifting sand dune, semi-drifting sand dune and gobi patches has become larger due to human activity intervention while the mean patch area of forest land, fixed sand land, arable land area has decreased for the mean patch area, the variation tendency of landscape diversity index and evenness index has increased while landscape dominance index has decreased. The results indicates that there is an intimacy relationship between the variation of landscape pattern and human activity.
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Received: 08 April 2003
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