Analysis on the Vegetation Landscape Pattern of Upper Reaches in Lijiang River Basin

Based on the multi-temporal remotely sensed data in 1991,1998 and 2006,this study analyzed the landscape pattern change characteristics in Upper reaches of the Lijiang river basin by using the methods of landscape ecology.The results showed the landscape pattern in Upper reaches of the Lijiang river basin changed significantly during the research phase:(1)The class area of shrub landscape which represent plantation increased rapidly in the period.(2)The class area of tree forest landscape which has key functions changed little,but the area of some large patches reduced obviously.(3)The herbosa patches degraded significantly and showed high fragmentation degree and separation degree.(4)The diversity and complexity degree of the vegetation landscape pattern declined in the period.(5)The ecosystem services value in soil formation and disposition,water conservation,bio-diversity conservation of the vegetation system decreased as a result of vegetation landscape patches improper distribution.