板桥自然保护区木本植物区系地理成分分析

Analysis of the Floristic Element of Woody Flora in Banqiao Natural Reserve

板桥自然保护区有木本植物81科,231属,492种,分别占该区维管植物总数的52.6%,41 5%和46.3%.和与之邻近的6个山地的木本植物区系相比,本区植物区系综合系数为0 021,位居第3,这表明其区系成分较为丰富.该区系优势科为木通科(Lardizabalaceae)、胡颓子科(Elaeagnaceae)、胡桃科(Juglandaceae)等;优势属为槭属(Acer)、悬钩子属(Rubus)、卫矛属(Euonymus)、铁线莲属(Clematis)等.科属地理成分分析结果表明:这81科可划分为10种分布型,其中以泛热带分布为主;231属可划分为14种分布型,其中以北温带分布、东亚分布和泛热带分布为主.因此其区系为温带性质,但同时受到热带、亚热带区系成分的影响.

There are 492 species, 231 genera, 81 families in Banqiao Natural Reserve(BNR), which make up 526%, 415%, and 463% of total number of species, genera, families of vascular plants respectively. Compared with 6 adjacent mountains, the integrative coefficient of woody flora in BNR is 0021, which is bigger than those of Longwangshan, Tiantangzhai, Jigongshan and Mazongling. As a result, this flora is relatively rich. Its predominant families are Lardizabalaceae, Elaeagnaceae, Juglandaceae, etc; predominant genera are Acer, Rubus, Euonymus, Clematis, etc. Based on geographical distribution, 81 families are classified into 10 arealtypes among which Pantropical element is dominant; 231 genera are classified into 14 arealtypes among which North temperate, East Asian and Pantropical elements are dominant. Therefore, the flora is temperate in nature but it is affected with tropical and subtropical floristic elements.