Landscape pattern change at the upper reaches of Minjiang River and its driving force

Chinese Journal of Applied Ecology ›› 2004, Vol. ›› Issue (10): 1797-1803.

Landscape pattern change at the upper reaches of Minjiang River and its driving force

HU Zhibin^1,2, HE Xingyuan¹, JIANG Xiaobo³, ZHAO Yonghua^1,2, HU Yuanman¹, CHANG Yu¹, LI Yuehui¹, HAN Wenquan^1,2, LIU Miao^1,2

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;
3. Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China

Received:2004-04-22 Revised:2004-07-06 Online:2004-10-15

Abstract

Abstract: The upper reaches of Minjiang River is an ecological sensitive and vulnerable area in southwest of China.It is of great significance to the ecological pattern safety in China.In this study,we analyzed the landscape pattern change through the interpretation of TM imageries in 1986,1995 and 2000.The results showed that the matrix landscape in this area was grass landscape.Forest landscape patches were embedded in the grass landscape.The forest landscape area increased from 1986 to 1995 and decreased from 1995 to 2000.However,the number of patches of forest landscape was increasing during all the time.This suggested that the intensity of anthropogenic disturbances including harvesting,forest landscape reclaiming and excessive grazing were persistently increasing from 1986 to 2000.The ecological driving forces of the landscape change in this area were the intensified anthropogenic disturbances as a result of the population boom including the predacious harvesting of forest and excessive grazing.The natural disturbances such as the global climatic change also partly influenced the landscape change in this area.

Key words: Upper reaches of Minjiang River, Landscape patterns, Driving force analysis

CLC Number:

Q149

HU Zhibin, HE Xingyuan, JIANG Xiaobo, ZHAO Yonghua, HU Yuanman, CHANG Yu, LI Yuehui, HAN Wenquan, LIU Miao. Landscape pattern change at the upper reaches of Minjiang River and its driving force[J]. Chinese Journal of Applied Ecology, 2004, (10): 1797-1803.

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