广南蒜头果群落植物物种组成特征分析

A Study on the Floristic Composition Characteristics of Malania oleifera Community in Guangnan County

为了解广南蒜头果(Malania oleifera)居群的植物组成特征,更好的保护和利用这一珍惜植物,对广南蒜头果群落植物物种组成特征进行了调查分析。结果显示,广南蒜头果群落有维管植物52属53种,其中乔木层6属6种,灌木层19属19种,草本层27属28种。植物组成特征为,种子植物中世界分布(广布型)6属,占15.00%;泛热带分布8属,占20.00%;旧世界热带分布3属,占7.50%;热带亚洲至热带澳大利亚分布3属,占7.50%;热带亚洲至热带非洲分布3属,占7.50%;热带亚洲分布3属,占7.50%;北温带分布5属,占12.50%;东亚-北美间断分布1属,占2.50%;欧亚温带分布或旧世界温带分布2属,占5.00%;中亚、西亚至地中海分布1属,占2.50%;东亚分布4属,占10.00%;特有分布1属,占2.50%。群落种子植物属、种分布区成分以热带成分为主,分别有20属,20种,占总属数的50.00%,占总种数的48.78%。说明广南蒜头果群落与热带区系联系更紧密。

In order to clarrify the floristic composition characteristics of Malania oleifera community in Guangnan and better protect and utilize this precious plant, the paper investigates and analyzes the characteristics of Malania oleifera community in Guangnan. There are 52 genera and 53 species of vascular plants. Among them, there are 6 genera and 6 species of tree layer, 19 genera and 19 species of shrub layer, and 27 genera and 28 species of herbaceous layer. The floristic composition characteristics are listed as below： 6 genera of seed plants of world distribution accounting for 15% of the total, 8 genera of the pan tropical distribution accounting for 20%, 3 genera of the Old World Tropics accounting for 7.50%, 3 genera of from tropical Asia to tropical Australia accounting for 7.50%, 3 genera of from tropical Asia to tropical Africa accounting for 7.50%, 3 genera in tropical Asia accounting for 7.50%, 5 genera in the north temperate zone accounting for 12.50%, 1 genus of East Asia and North America disjunctive distribution accounting for 2.50%, 2 genera of Eurasian temperate distribution or Old World temperate distribution accounting for 5.00%, 1 genus of Central Asia, West Asia to the Mediterranean distribution accounting 2.50%, 4 genera in the distribution of East Asia accounting for 10% and the special distribution 1 species accounting for 2.50%. Flora of seed plant genera and species composition is dominated by tropical elements, respectively having 20 genera and 20 species, accounting for 50.00% of the total genera and 48.78% of the total number of species. Guangnan malania oleifera community is more closely associated with tropical flora.