兴国县森林景观格局变化分析

Analysis of forest landscape pattern change in Xingguo county

基于江西省兴国县2003年、2009年、2013年3期森林资源二类调查数据,采用景观指数分析法分析其森林景观格局变化。结果表明：研究区的优势景观类型为马尾松林、杉木林景观,两者总面积占森林景观总面积的80%以上。2003~2009年与2009~2013年两个时期内景观指数差异最大的为：马尾松林景观的斑块数;杉木林景观的景观比例;阔叶纯林景观的破碎度;疏林地景观的平均斑块面积与分离度;林龄均匀度指数分析结果表明,国外松林、其他经济林、混交林与杉木林景观的林龄结构较为合理。综合分析表明,林业产权制度改革及造林绿化＂一大四小＂工程和2008年南方特大冰冻等自然灾害是引起研究区森林景观变化的主要因素。

Based upon the forest management inventory data of 2003, 2009 and 2013 in Xingguo Country, the change of forest landscape pattern was studied through the method of landscape index analysis. The results indicate that the landscape of Pinus massoniana forest and Cunninghamia lanceolata forest are showing a strong advantage, which make up more than 80% of the total forest landscape in square meter. The landscape index which have the biggest differences in variation of landscape type during the period of 2003 ~ 2009 and 2009 ~ 2013 are as follows. The number of Pinus massoniana forest; the landscape proportion of Cunninghamia lanceolataforest; the landscape fragmentation index of broad-leaved forest; the average patch area and the separation index of open forest; the forest age structure of pure forests of exotic pines, other economic forest, mixed forest and Cunninghamia lanceolata forest landscape are more reasonable. Integrated analysis imply that the key drivers of the forest landscape pattern change in the study area are the Reform of Forestry Propery Right,＂One Big and Four Small＂project of afforestation and 2008 heavy southern freeze disaster.