Abstract:

Nowadays planning and strategic environmental assessment (SEA) are always short of ecological evaluation indicators on landscape functions.This paper presented two indicators,the biological productivity and the ecological quality,to characterize landscape ecological function on the basis of the dynamic relationship between the landscape space pattern and its ecological function.Based on GIS,the ecological productivity could be calculated by the transfer matrix of landscape elements and biological productivity per unit area of landscapes，which were inferred from patch area index and statistical gearbooks，respectively.The relationships among ecological quality，Shannon Diversity Index and Shannon Evenness Index were obtained according to some document statistics about landscape heterogeneity index in basin researches.In the case of the region along the Yangtze River in Jiangsu Province,data of 2000 and 2004 were used to demonstrate that the biological productivity and the ecological quality could definitely reflect the variation of the landscape function and these two indicators are practicable in future planning and SEA.