THE RESEARCH ON EVOLUTION OF LANDSCAPE STRUCTURE IN URBAN ECOSYSTEM OF YIWU CITY
基于1996-2005年遥感数据，分析义乌市环城路内景观格局变化，发现自然和半自然景观面积大幅减少，人工景观面积显著增加，反映了城市化进程。
Landscape pattern of Yiwu urban areas within city ringed road was classified based on remote sensing data of year of 1996,1999,2002 and 2005.The paper researched effects of human activities on landscape pattern of urban ecological system of Yiwu city by analytical methods of landscape index and transfer matrix.The results showed that during year of 1996 to 2005,the area of natural landscape has lost 145.58 hm~2 and which rate of decrease descends from 8.95% to 7.30% and whose annual gradient is 2.05%,the area of half-natural half-artificial landscape has lost 3 545.32 hm~2 and which area of decrease is more than half in 1996 and whose annual gradient is 6.17%,the area rate of half-natural half-artificial landscape has dropped from 72.33% to 32.17%,the area of artificial landscape has been increased by 3 690.89 hm~2 and area rate of which is increased from 18.72% to 60.53% and whose annual gradient was 24.82%.It shows that urban ecosystem landscape evolution is indeed the urbanization of natural landscape and half-natural half-artificial landscape.