贵州省国家重点保护野生植物物种丰富度分布特征及保护优先区分析

Species abundance distribution feature and protection priority area of the national protected wild plants in Guizhou Province

该研究以国家重点保护野生植物为指示物种,结合贵州各县(市、区)的国家重点保护野生植物调查统计信息,基于GIS技术,分析了贵州省国家重点保护野生植物物种丰富度分布特征;应用Dobson算法筛选识别贵州国家重点保护野生植物的保护优先区,并利用全省已建自然保护区信息评价分析所筛选的保护优先区的保护现状。结果表明:(1)在贵州国家重点保护野生植物的物种丰富度分布上,总体来说全省南部地区高于北部地区,环省界区域往内陆延伸的物种丰富度明显呈现减少趋势。(2)在75%和100%的国家重点保护野生植物物种保护水平上,筛选识别出了荔波县等4个和17个县域为保护优先区,其中分别有1个和9个国家重点保护野生植物保护优先区内涵盖的自然保护区面积低于5%,且涉及的自然保护区中68.26%的面积是市/县级。(3)贵州国家重点保护野生植物物种较丰富的区域和全省生物多样性热点区域与所筛选识别的保护优先区有较好的空间对应关系。(4)贵州国家重点保护野生植物的就地保护应以国家重点保护野生植物地理分布丰富的区域结合本研究筛选的保护优先区为重点,进行优先保护。

We used the national protected wild plants as indicator species and combined with the statistical survey information of the national protected wild plants in the county(city,district)to analyze the geographical distribution feature of species richness based on the GIS technology in Guizhou Province.We applied Dobson algorithm to identify the protection priority area of national protected plant.Then we used the information of existing nature reserves to assess the protection status of the national protected wild plants priority conservation areas in Guizhou.The results were as follows:(1)In terms of the species richness distribution of the national key protected wild plants in Guizhou,the southern region was generally higher than the northern region,and the species richness of the area extending inland from the provincial boundary was obviously decreasing.(2)In terms of the 75%and 100%national protected wild plants conservation levels,four and seventeen counties(cities,districts)like Libo County,were identified priority conservation areas.Among them,one and nine national priority zones of key protection of wild plants covered less than 5%of the nature reserves,and 68.26%of the areas involved were at city/county level.(3)The areas with abundant wild plant species under state key protection and the biodiversity hotspots in the whole province had good spatial correspondence with the selected priority areas in Guizhou.(4)Local protection of wild plants under state key protection should be carried out in priority areas with rich geographical distribution of wild plants under state key protection combined with priority areas selected in this study in Guizhou.