江西国家重点保护野生植物的时空分析

江西省国家重点保护野生植物29科45属53种,其中蕨类植物4科5属7种,裸子植物6科11属13种,被子植物19科29属33种;国家重点保护野生植物中单属科和单种科各8个,中国特有科3个,单种属15个,中国特有属16个,分布区类型12个,其中以热带或以热带分布为主的属占总属数的26.67%;以温带或以温带分布为主的属占31.11%;中国特有分布最突出,占35.56%。特有属分布型6个,与华中、西南关系最密切。同时,采用综合指数和相似度,把江西省与各省区比较,结果表明:江西省国家重点保护植物十分丰富,江西省植物区系与其周边省份关系最密切。

Space-time analysis on the national protected wild plants in Jiangxi Province

There are 53 species,45 genera and 29 families of national protected wild plants in Jiangxi Province.Among them,there are 8 single-species and single-genus families respectively and 3 endemic families of China,15 single-genus and 16 endemic genera of China.7 species,5 genera and 4 families of fern;13 species,11 genera and 6 families of gymnosperm;33 species,29 genera and 33 families of angiosperm.There are 12 areal types.Among them,tropical distribution accounts for 26.67%,temperate distribution accounts for 31.11% and endemic genera accounts for 35.56% in the total genera.There are 6 distribution patterns of the endemic genera.The floristic relation is much closer with Southwest and Central China.Comparing Jiangxi Province with other provinces in composite index and similarity degree,the threatened plants is extremely rich in species of Jiangxi Province.The floristic relation between the adjacent provinces and Jiangxi Province is much closer.