长白山露水河林业局森林景观格局动态

基于1987、1995、2003年长白山露水河林业局森林资源二类调查资料，利用ArcGIS和FRAGSTATS等软件，在景观水平和斑块水平上分析了1987-2003年该区景观格局变化及其与森林经营机制之间的关系.结果表明：研究期间，研究区森林景观破碎化程度加剧、景观异质性程度加大；1987-2003年，研究区斑块数增加979块，最大斑块面积比例逐渐下降，由1987年的28.7%降至2003年的12.7%；由于经营方式的转变，该区景观基质由1987年的阔叶混交林转变为1995年后的混合景观基质；景观破碎化程度在1995-2003年的变化趋势较1987-1995年有所减缓；期间，该区阔叶混交林的平均斑块面积下降最多、边界分割程度最高，表明天然次生林受人类干扰最大.

Dynamic changes of forest landscape pattern in Lushuihe Forest Bureau of Changbai Mountains,Northeast China

Based on the forest management inventories in Lushihe Forest Bureau of Changbai Mountains in 1987, 1995 and 2003, and by using ArcGIS and Fragstats spatial analysis software, this paper analyzed the relationships between landscape pattern change and forest management mechanism in the study area at landscape and patch scales. During the study period, the landscape fragmentation degree and heterogeneity in the study area increased. From 1987 to 2003, the patch number increased by 979, while the proportion of the largest patch area decreased from 28.7% to 12.7%. With the change of management strategy, the landscape matrix changed from mixed broadleaved forest matrix in 1987 to compound matrix in 1995. The extent of landscape fragmentation in 1995-2003 was somewhat reduced, compared with that in 1987-1995. During the study period, the mean patch area and edge density of broadleaved mixed forest decreased most, suggesting that natural secondary forest suffered most from human disturbances.