江苏省珍稀濒危植物分布格局分析

Analysis of distribution pattern of rare and endangered plants in Jiangsu Province

在全球气候变化剧烈的背景下,珍稀濒危植物面临的严峻生存状况将进一步影响生物多样性的可持续发展.收集统计了江苏省24科37属43种野生珍稀濒危植物的相关信息,利用ArcGIS将植物分布格局进行空间可视化显示,结合各区(市)地理环境与人口经济等情况进行数据分析,结果显示:江苏省珍稀濒危植物大多分布范围较狭窄,呈小数量零星分布,其中特有种包含金钱松(Pseudolarix amabilis)和秤锤树(Sinojackia xylocarpa)等8种.省内珍稀濒危植物属的地理区系成分较为多样,具有热带和温带的过渡特性.生活型具有典型地带性植被特征,以落叶高位芽植物为主.省内珍稀濒危植物集中分布于西南部丘陵地带,植物狭窄的适生生境、微生境的构成和人类经济活动对自然的影响共同促成了江苏省珍稀濒危植物的分布格局.

Under the background of drastic global climate change,the severe survival situation of rare and endangered plants will further affect the sustainable development of biodiversity.The information of 43 species of rare and endangered wild plants belonging to 37 genera and 24 families in Jiangsu province was collected and analyzed.The spatial visualization of plant distribution pattern was carried out by using ArcGIS,and the data were analyzed by combining geographical environment and population and economy of each district(city).The results show that:(1)The majority of threatened plants in Jiangsu Province are distributed in a narrow range,and most of them are sporadic and small in number.There are 8 endemic species,such as Pseudolarix amabilis and Sinojackia xylocarpa.(2)The geographical floristic of threatened plant genera is relatively diverse,with transitional characteristics of tropical and temperate zones.The life forms are dominated by high buds,most of which are deciduous plants.(3)The threatened plants are mostly distributed in the hilly area in the southwest of the province.The narrow suitable habitats,composition of microhabitats and the human economic activities form the distribution pattern of the threatened plants.