西藏自治区交叉重叠自然保护地特征研究

Study on Characteristics of Intersecting and Overlapping Nature Protected Areas in Tibet

为准确掌握西藏自治区自然保护地交叉重叠特征,以区域内81处参与整合优化工作的自然保护地的基本信息为依据,使用空间叠置分析、核密度分析、地理集中指数、热点分析4种方法,得出西藏自治区交叉重叠自然保护地主要特征。结果表明:全区共有27处自然保护地以不同方式存在空间交叉重叠,交叉重叠率33.33%;空间分布形态呈东西分布,中心—边缘组团特征显著;交叉重叠自然保护地按类型分自然保护区占据首位,各重叠类型分布不均衡,按级别分以国家级保护地为主,具有单一性;区域分布差异大,交叉重叠保护地主要集中分布在林芝市,日喀则市和拉萨市分布最分散。本次研究结果对西藏自治区自然保护地整合优化具有指导意义,也为后续建立新设立自然保护地科学选址提供参考。

In order to accurately grasp the intersecting and overlapping characteristics of Tibetan nature protected areas,this paper takes the basic information of 81 nature protected areas which participating in the integration and optimization in the region as the gist.The main characteristics of intersecting and overlapping nature protected areas in Tibet Autonomous Region have been obtained by using four methods of spatial overlay analysis,kernel density analysis,geographic concentration index and hotspot analysis.The results show that:there are 27 nature protected areas in the region in different ways of spatial intersecting and overlapping,and the intersecting and overlapping rate is 33.33%;the spatial distribution form is east-west distribution,the center edge group characteristics are significant.As for these intersecting and overlapping nature protected areas,if classified according to types,the nature reserve takes the top spot and the distribution of each overlapping type is not balanced;if classified according to levels,the national protected areas as the main and with the oneness.The difference of regional distribution is large,the intersecting and overlapping protected areas take the main concentration distribution in Nyingchi City while Xigaze City and Lhasa City are the most scattered.The results of this study have directive significance to the integration and optimization of nature protected areas in Tibet Autonomous Region,and can also provide references to the scientific site selection of the new subsequent nature protected area establishment.