井冈山自然保护区森林资源变化分析

以井冈山林相图为基础图形资料,根据1999年的二类清查资料建立数据库,建立森林资源地理信息系统,论述了森林资源的分布特征;统计了各种森林类型的面积;实现了资源现状的可视化以及森林类型自动查询和检索;并输出专题图.关于森林资源变化动态分析得出:从1988年至1999年井冈山自然保护区的森林覆盖率从73.1%增长到85%:有林地比例从77.80%增加到88.38%,1988年、1995年、1999年单位面积的蓄积量分别为65.25m3/hm2、96.15m3/hm2、105.50m3/hm2,蓄积显著增加后趋于稳定.1995年和1999年保护区总生物量分别为6 160 986.70t和6 245 181.834t,碳储量密度分别为86.82t/hm2和90.93t/bm2,平均增长1.83t/hm2·a,碳汇作用明显.

Forest Resource Change Dynamic Analysis Assisted by Using GIS in Jinggang Mountain Natural Reserve

Based on forestry map of Jinggang mountain and database which was built in 1999, we have developed a Jinggang mountain natural reserve forest resources geographical information system by GIS. We had narrated the distribution of forest resources, counted the area of different forest types. Resources status was easily seen by the system and forest type could be automatically inquired and ~arehed. Five types of forest map were made and dynamics of forest subjects were analyzed. The result showed that from 1988 to 1999, the forest coverage percentage was going up,from 73.1% to 85%; the area of forest increased quickly; percentage of woodland rose from 77.8% to 88.38% ; the forest stock of 1988, 1995 and 1999 is 65.25m^3/hm^2 , 96.15m^3/hm^2, 105.5m^3/hm^2, respectively. The trend apparently moved up before stabilization, Finally, the biomass was calculated as 6,160,986.70t in 1995 and 6,245,181.834t in 1999, the average carbon density of natural reserve was 86.82t/hm^2 and 90.93t/hm^2,on average,the increment was L83t/hm^2a. It draws conclusion that the forest ecosystem of Jinggang mountain natural reserve was carbon sink.