庞泉沟国家级自然保护区森林景观格局动态

以1990年TM,1999年ETM和2004年SPOT5等3期卫星影像数据为基础资料,应用遥感技术（RS）和地理信息系统（GIS）技术,通过斑块密度、多样性指数、均匀度指数和聚合度等多种指标,对山西省庞泉沟国家级自然保护区的森林景观格局动态进行全面分析。结果表明：研究时段内的景观总体的斑块密度和边缘密度持续增加,表明景观总体的破碎化程度增加。景观整体的多样性有所下降,均匀度指数也处于低水平,说明景观中的优势类型逐渐加强其优势地位。保护区管理部门应密切关注景观破碎化现象,建议调整经营措施,控制人为干扰,延长采伐周期,增加林分郁闭度。表4参12

Dynamics of forest landscape pattern in Pangquangou National Nature Reserve

Based on 1990 TM,1999 ETM and 2004 SPOT 5 satellite images,the geographic information system(GIS) technique was used to analyze the forest landscape dynamic of Pangquangou National Nature Reserve with indices including patch density,Shannon's diversity index,Shannon's evenness index and landscape aggregation index.The analysis of forest landscape dynamics indicated that the average size of woodland patches was gradually increased.During the research period,patch density and edge density of whole landscape were on the rise,which indicated that the whole landscape had a fragmentation trend.The forest landscape diversity decreased.As the dominant landscape type had more advantages,the heterogeneity of whole landscape was lower.The management departments of the reserve should pay great attention to the landscape fragmentation.They should adjust the management measures,control jamming,prolong the logging cycle,and increase the canopy density of stand.Ch,4 tab.12 ref.]