江西九连山常绿阔叶林群落区系特征分析

采用群落生态学的方法对九连山常绿阔叶林的区系组成进行了分析。样地调查结果表明,群落内种类丰富,种子植物共有144科379属647种,其中裸子植物有6科8属9种,单子叶植物21科77属116种,双子叶植物117科294属522种。九连山常绿阔叶林群落的主要表征科为壳斗科、樟科、冬青科、蔷薇科、厚皮香科、山茶科、茜草科、桑科、大戟科等,且多为热带或亚热带科。从样地科的分布型统计看,热带、亚热带与温带成分属的比例为100∶62.8。从属的分布型统计看,有205属热带、亚热带地理分布类型;131属温带地理分布类型,35属世界广布类型和8属中国特有分布类型;热带、亚热带与温带成分的属比例为100∶63.9。九连山常绿阔叶林群落的标志种及其区系组成均较好地反映了本地区热带、亚热带区系成分的组合特征,对于九连山自然保护区天然常绿阔叶林的保护与发展具有重要的参考价值。

Floristic analysis of the evergreen broad-leaved forest community from Jiulianshan National Nature Reserve in Jiangxi Province

Floristic composition of the evergreen broad-leaved forest in Jiulianshan Mountain was analyzed based on field investigation and community ecology.The community was rich in species diversity,with 144 spermatophyte families including 379 genera and 647 species,in which there were 6 gymnosperm families including 8 genera and 9 species,21 monocotyledon families including 77 genera and 116 species and 117 dicotyledon families including 294 genera and 522 species.Dominant families of the flora were Fagaceae,Lauraceae,Aquifoliaceae,Rosaceae,Ternstroemiaceae,Theaceae,Rubiaceae,Moraceae,and Euphoarbiaceae,most of which are tropical-and-subtropical distribution.As for family systematic distribution,the rate of genera of tropical-and-subtropical to temperate was 100:62.8 in 142 genera of 16 families.As for generic distribution in field investigation data,the tropical-and-subtropical areal type accounted for the majority of genera,in which there were 205 genera belonging to the tropical-and-subtropical areal type,131 genera belonging to the temperate areal type,35 genera belonging to the Cosmopolitan areal type and 8 genera belonging to the Endemic to China areal type.The rate of genera of the tropical-and-subtropical to temperate was 100∶63.9.Floristic composition of the evergreen forest community in Jiulianshan and the typical species of the zonal flora will provide scientific foundation for stand rehabilitation and stand establishment approximating to the natural evergreen broad-leaved forest community.This study also indicates that the sampled data based on community research are valid and convenient for floristic and environmental analysis of the evergreen broad-leaved forest community from Jiulianshan Mountain.