南长山岛种子植物区系研究

Flora of Seed Plants in Nanchangshan Island

调查研究发现南长山岛有种子植物80科286属482种,并发现2个新变种。南长山岛地理成分复杂,区系类型多样,现有286个属,可分为15种分布型,482种分为14种分布型。本研究在区系地理成分分析的基础上得出本地区具有以下几个特点:1)植物种类丰富,温带成分优势明显,热带成分比例较大;2)分布类型多样,地理成分复杂,显示出多方植物交汇的特点;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;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)与山东半岛和辽东半岛的关系为,南长山岛与山东半岛一致性很高,而与辽东半岛有一定的差异;6)种的生活型组成为高位芽植物、地面芽植物和一年生植物优势明显,隐芽植物和地上芽植物占的比例较少。

There are 482 species belonging to 80 families and 286 genera, and two varieties are newly found. The flora is complex in geographical elements, with 15 types of 286 genera and 14 types of 482 species. Based on analyzing the geographical elements of the flora, the species of plants were rich and the temperate elements were obviously dominant. The proportion of tropical elements was higher. The flora was diverse in distribution types and complex in geographical elements.The characters that the flora connects widely with others were advented. The flora had a certain old origin and a certain low in endemicity with a good number of monospecific genus. At the species level, the East Asia was dominant. The Endemic to china phenomenon was obvious. The relationship between Shandong Peninsula and Liaodong Peninsula, Nanchangshan island and Shandong peninsula was highly consistent. There were some differences with the Liaodong Peninsula. The life-form composition on species was that Ghanerophytes, Hemicrytophytes and Therophytes was doninant. Cryptophytes and Chamaephytes accounted for the less.