庙岛种子植物区系研究

Research on Flora of Seed Plants in Miaodao

为探讨庙岛的植物区系性质,通过实地采样对庙岛的种子植物资源进行了系统调查。结果表明,庙岛有种子植物66科,221属,378种,并发现1个新变种、2个山东省新纪录种。庙岛种子植物现有221个属可分为15个分布型,378种分为14种分布型。该区系具有以下几个特点:(1)植物种类较丰富,温带成分优势明显,热带成分占较大的比例;(2)分布类型多样,地理成分复杂,显示出南北方植物交汇的特点;(3)区系成分具有一定的古老性,单种属成分较多,区系的特有程度较低,拥有较多的滨海植物;(4)在种级水平上,东亚分布占优势,中国特有种现象较为明显;(5)物种生活型的组成特点是地面芽植物、高位芽植物、1年生植物和隐芽植物占总数的比例均较大,而地上芽植物占的比例较小。

To explore the flora nature of Miaodao,the systematical investigation of the seed plant resources was done by sampling in Miaodao.The results showed that there were 378 species which belonged to 66 families and 221 genera,and one new variety and two new recorded species of Shandong province were found.The flora included 15 types of genera and 14 types of species.Based on the analysis of the geographical elements of the flora,the major characteristics of the flora were as follows：（1）the species of plants was very abundant and the temperate elements had obvious advantages,and the proportion of tropical elements was higher;（2）the flora was diverse in distribution types and complex in geographical elements,showing the character of junction of the north and the south plants;（3）the flora showed a certain old origin and low endemicity,and had a number of monospecific genus and coastal plants;（4）at the species level,the East Asia took advantage,the phenomenon of endemic species to China was more obvious;（5）the life-form composition of species was that hemicrytophytes,ghanerophytes,therophytes and cryptophytes accounted for the larger proportion of the total,chamaephytes accounted for the smaller proportion of the total.