江西峤岭省级自然保护区种子植物区系分析

Flora analysis of seed plants in Qiaoling provincial nature reserve,Jiangxi province

采用样线法和样方法相结合的方法,对峤岭省级自然保护区的种子植物进行了较全面调查,研究表明:(1)该保护区共有野生种子植物132科480属957种,其中裸子植物3科5属5种;被子植物129科475属952种。(2)生活型谱显示木本植物数量低于草本植物,木本植物中常绿成分低于落叶成分,乔木比例明显较低,表现出明显的恢复性植被特征。(3)科的分布型以世界广布(43)和泛热带分布(38)为主,热带分布型科和温带分布型科之比(R/T)约为1.78;属的分布型以泛热带分布(104)和世界广布(55)为主,热带分布型属和温带分布型属之比(R/T)约为1.07,热带性质稍占优势,呈现从热带性质向温带性质过渡的特点。(4)与周边保护区进行比较发现,峤岭植物区系与中国东部具有统一性,并呈现出明显的亚热带山地性质,整体上反映出中国东部季风区植物区系的基本特征;同时也显示低山丘陵地貌更有利于热带分布型植物生长。

Using the method of on-the-spot sample transect lines and plots survey,a comprehensive investigation on the seed plants in the Qiaoling provincial nature reserve was conducted.The research shows:①The reserve had a total of 957 species from 480 genera and 132 families of wild seed plants,including 5 species from 5 genera and 3 families of gymnosperms and 952 species from 475 genera and 129 families of angiosperms.②The Life-form spectrum showed that the number of woody plants was lower than that of herbaceous plants,the evergreen component of woody plants was lower than that of deciduous components,and the proportion of trees was significantly lower,showing obvious characteristics of restorative vegetation.③The distribution types at families level were mainly distributed in the world(43)and pan-tropical distribution(38).The ratio(R/T)of tropical to temperate was about 1.78.At genus level,the main distribution types were pan-tropical distribution(104)and worldwide distribution(55),the ratio(R/T)of tropical to temperate was about 1.07,and the tropical nature was slightly dominant,showing the characteristics of transition from tropical nature to temperate nature.④Comparison with neighboring protected areas revealed that the flora in Qiaoling has unity with that of eastern China showed an obvious subtropical mountain characteristics,reflecting the basic feature of the flora of the monsoon region in eastern China as a whole.Furthermore,the results also indicated that the low mountain and hilly terrain was more conducive to the growth of plants with tropical nature.