【摘要】 四川省实施天然林保护工程至今已有20余年,包括天然林资源在内的各类森林资源发生了较大变化,因此有必要开展天然林资源动态变化研究,探讨其内部结构与变化趋势,为天然林后续保护与管理提供科学参考。基于概率论与数理统计和景观生态学原理,利用全省1997年和2017年两期森林资源连续清查固定样地数据,选取景观连通性指数作为分析指标,定量分析与解释了近20年四川省天然林资源景观格局的主要变化规律和特征。结果表明:过去20年四川省天然林景观连通性指数增加了0. 06,天然林空间分布总体呈现连通趋势,森林资源得到有效恢复,但同时也存在部分林分质量不高、结构不合理等问题,需进一步加大资金投入,开展科学研究和技术创新,探索天然林资源经营管理方法和措施,不断提升天然林质量,优化林分结构。更多还原

【Abstract】 It was 20 a that the implementation of the natural forest protection project carried out in Sichuan,and all kinds of forest resources,including natural forest resources had undergone great changes. Therefore,it was necessary to carry out the research on the dynamic change of natural forest resources,to analyze its internal structure and change trend,and to provide scientific reference for the follow-up protection and management. Based on the principles of probability theory,mathematical statistics and landscape ecology,this paper made use of the fixed land data of the province’s forest resources in 1997 and 2017,selected the landscape connectivity index as the analysis index,and quantitatively analyzed and explained the main change rules and characteristics of natural forest landscape pattern in Sichuan Province in recent 20 a. The results showed: At the recent 20 a,the natural forest landscape connectivity index increased by 0. 06,the natural forest spatial distribution showed an overall connectivity trend,and the forest resources were effectively restored. But also some problems such as poor quality and unreasonable structure of stands. Therefore,it was necessary to further increase capital investment,carry out the scientific research and technological innovation,explored the management methods and measures of natural forest resources,constantly improved the quality of natural forests and optimized the structure of stands.更多还原