安化县天然林景观格局与动态演变研究

Study on landscape pattern and dynamic evolution of natural forest in Anhua County

基于2013年安化县森林资源规划设计调查数据、2017年林地变更调查数据,利用地理信息系统软件及景观格局指数计算软件,分析安化县天然林景观格局特征,对安化县天然林空间格局与动态演变进行研究。结果表明:安化县天然林主要是由竹林和阔叶林组成,占安化县天然林总面积的80%以上;从天然林整体变化情况来看,2013—2017年安化县天然林面积整体呈减少趋势,各森林类型斑块密度、景观类型比略有变化,天然林景观整体变化不大,景观维持平衡稳定;天然林景观在空间分布趋于聚集分布,连接状况趋于更佳,天然林斑块的形状趋于更规则、更复杂,景观格局趋于更好。

Based on the investigation data of forest resources planning and design and forest land change in Anhua County in 2017, the landscape pattern characteristics of natural forests in Anhua County were analyzed by using GIS software and landscape pattern index calculation software, and the spatial pattern and dynamic evolution of natural forests in Anhua County were studied. The results show that natural forests in Anhua County is mainly consist of bamboo forests and broad-leaved forests, accounting for more than 80% of the total natural forest area in Anhua County.For the overall change of natural forests, the overall area of natural forests in Anhua County decreased from 2013 to 2017, patch density and landscape type ratio changed slightly, the overall change of natural forest landscape was not significant, and the landscape remained stable and balanced. The spatial distribution of landscape tends to be clustered, the connection condition tends to be better, the shape of natural forest patches tends to be more regular and complex, and the landscape pattern tends to be better.