濒危植物广西火桐群落特征研究

Study on Community Characteristics of Endangered Species Erythropsis kwangsiensis

采用样地调查法,对广西特有的珍稀濒危植物广西火桐(Erythropsis kwangsiensis)群落特征进行分析,结果表明:在3个样点共1 200 m2的样方中,含维管束植物68科122属152种,这些属可划分为11个分布区类型,其中热带分布的属优势明显,占81.1%;群落生活型以高位芽植物为主,地上芽植物次之;叶的性质以中型叶、单叶、纸质、全缘为主;广西火桐群落结构复杂,可分为乔木层、灌木层和草本层,层间植物丰富,广西火桐在乔木层中处于单优势种地位;由于人类活动的干扰,群落表现出明显的次生性质。

Erythropsis kwangsiensis,an endemic species in Guangxi,was a rare-endangered species.Its natural communities were scarce.On the basis of typical community plot investigation data,there were 152 species of vascular plants belonging to 122 genera and 68 families in 3 plots with an area of 1200m2.The floral composition could be divided into 11 areal types.In terms of genus geographical elements,many of them were distributed in tropical zones.81.1% of the genera were the tropical elements.According to Raunkiaer＇s statistics of life-form,the phanerophytes was the main life-form and the chamaephytes took second place. The features of the community leaf was mainly mesophyllous,single,paperaceous and entire.The community structure was complicated which could be divided into tree layer,shrub layer,herb layer,and rich interstater plants.The tree layer was dominated by individuals of Erythropsis kwangsiensis in the community.By human interference,the characteristics of community showed obvious secondary characters.