云南威远江省级自然保护区森林资源现状及干扰评价

Current Situation and Disturbance Evaluation of Forest Resources in Weiyuanjiang Provincial Nature Reserve in Yunnan Province

基于GIS技术,对保护区2019年森林资源现状及人为干扰情况进行了分析和评价。结果表明:(1)保护区林地总量较大,但结构较为简单,林地占99.91%,其中仅包括有林地、未成林地和无立木林地3种,以有林地为主(99.96%),森林覆盖率高达99.87%;(2)保护区森林以天然林为主,面积占比高达99.86%,优势树种主要以思茅松为主,龄组以成熟林为主(51.49%),总体来看树龄趋向于老龄化;(3)保护区受到一定程度的人为干扰,干扰指数为1.156 7,缓冲区(1.316 9)干扰指数高于核心区(1.000 8)、实验区(1.200 3)及保护区整体。目前,保护区森林资源综合质量较好,保护管理相对较好,今后应加强资源变化监测,预防人为及自然灾害的发生。

Based on GIS technology, the current situation of forest resources and human interference in 2019 in the reserve were analyzed and evaluated. The results showed that:(1)The total amount of forest land in the reserve was large, but the structure was relatively simple,with the forest land accounting for 99.91 %, including only three types of forest land, unformed forest land and non-standing forest land, with the forest land being the main type(99.96 %) and the forest coverage rate as high as 99.87 %;(2) The forest in the reserve is mainly natural forest, accounting for 99.86 % of the area. The dominant tree species are Pinus kesiya and the age group is mainly mature forest(51.49%). Generally speaking, In general,trees tend to be aged;(3) The protected area was disturbed by human beings to a certain extent, and the disturbance index was 1.1567. The disturbance index of buffer area(1.316: 9)was higher than that of core area(1.000 8), experimental area(1.2003) and the whole protected area. At present, the comprehensive quality of forest resources in the reserve is good and the protection and management are relatively good. In the future, monitoring of resource changes should be strengthened to prevent the occurrence of man-made and natural disasters.