摘要
晋东南山区地处山西省东南,有野生种子植物974种,隶属于456属125科,其中裸子植物7科11属15种,被子植物118科445属959种(其中双子叶植物104科396属833种,单子叶植物14科,49属126种);双子叶植物和单子叶植物占山西和全国科属种的比例较大,优势科和优势属在晋东南山区植物区系组成中占有突出地位。从晋东南山地种子植物多度分布得出,菊科含属48属;禾本科39属;豆科23属;唇形科21属;蔷薇科21属。含种最多的科为菊科97种、蔷薇科96种、禾本科55种、唇形科43种。科内属和科内种回归分析得出,科内属和科内种显示出同样趋势,含属较多的科含种也较多。但科内属变化较平缓,而科内种变化较陡,种数迅速下降,并且有的较特殊,如禾木科含属仅次于菊科,但含种却次于菊科、蔷薇科和豆科;再如杨柳科含属仅两属,但含的种数却达到18种。以科内属和种的百分数为指标分析多度分布同样说明了这个问题。晋东南山地种子植物科属分布类型可划分为15个类型,以各种温带成分占绝对优势,共有250属(表2中的8,9,10,11,13)占总属数的60.98%,热带成分次之(有97属,占总属数的23.67%),具有典型的暖温带落叶阔叶林的性质。种子植物种的区系地理成分可划分为12个分布区类型,以中国特有种占绝对优势,达383种,占总种数的39.32%。
Jindongnan Mountainous Region,located in the southeast of Shanxi,is situated between 35°10′-37°8′and 111°33′-113°4′.It is consisted of the southern of Taihang Mountains ,the eastern of Zhongtiao Mountains and the southeast of Taiyue Mountains.There are 974 species of wild seed plants,belonging to 456genera and 125 families in the region.Among which gymnosperms have 7 families 11 genera and 15 species,and angisperms have 118 familise 445 genera and 959 species,the angisperms are composed of cicolyedon and monocolyledon have 104 families 396 genera and 833 species and 14 families 49 genera and 126 species,respectively. The flora of genera in Jindongnan Mountainous Region has some typical characteristics of warm-temperat deciduous broad-leave forest.Among them temperate distribution compositions make significant dominant and it has 250 genera,accounting for 60.98%in the total genera.The tropic elements are secondary,which have 97 genera,accounting for 23.67%in the total genera.Moreover,383 species among the floristi celement of species are endemic to China,accounting for 39.32%in the total spcies and make evidently dominant.They are the main elements of the edificatos and dominant species of dominant vegetation types. Compared with the flora and the vegetation of he Jindongnan Mountainous Region in shanxi,Taibai Mountaints ,Qinling Ranges in shanxi,Huazhong Ranges and Huadong Ranges,There is higher homogeneitive and closely relationship between the Jindongnan Mountainous Region and the Taibai Mountaints,Qinling Ranges in shanxi;There is closely relationship between the Jindongnan Mountainous Region and Huazhong Ranges;there is some relationship between the Jindongnan MountainousRegion in shanxi and Huadong Ranges.
出处
《长治学院学报》
2005年第2期4-8,共5页
Journal of Changzhi University
