澜沧江自然保护区中山湿性常绿阔叶林生活型特征研究

基于累计面积3 500 m2的7个样地资料,根据Raunkiaer的分类系统,对云南澜沧江自然保护区中山湿性常绿阔叶林的维管植物生活型及叶特征进行了统计分析.结果表明:该群落以小、中高位芽植物占优势,分别为28.85%和17.31%,并有较大比例的地面芽植物(12.2%)和附生植物(8.33%).叶级以小型叶为主(65.4%),叶片特征以单叶(82.1%)、革质叶(52.5%)、全缘叶(62.2%)、非尾尖叶(84.0%)为主.对群落不同层次的叶特征进行分析,并与其他地区同类群落进行比较,发现该群落既表现了亚热带常绿阔叶林的一般特征,也表现了典型的云南亚热带地区的低纬度、高海拔山地森林群落的特征,即对干湿季分明的气候及湿润、寒冷生境的适应特征.

Analysis on Life Form Characteristics of the Mid-montane Humid Evergreen Broad-leaved Forest in Lancangjiang Nature Reserve

Based on the data investigated from 7 plots(amounted to 3 500 m~2),and according to Raunkiaer life-form classification system,the life forms and leaf characteristics of vascular plants in the mid-montane humid evergreen broad-leaved forest that was located in the Lancangjiang Nature Reserve,in Yunnan Province were analyzed.It was showed by the results that in this community,micro-phanerophytes and meso-phanerophytes occupied the dominant position,accounting for 28.85% and 17.31% respectively.Hemicryptophytes(12.2%) and epiphytic(8.33%) had higher percentage.The dominant leaf size was microphyll.With regard to the leaf characteristics,the communities were mainly composed of simple leaf(82.1%),sclerophyll(52.5%),entire leaf(62.2%) and non-drip tip leaf(84.0%).Through analyzing the characteristic of leaves on different layers,and by comparing with other plants communities,the result showed that this community represented the general characteristic of subtropical evergreen broad-leaved forest,and it also represented the typical physiognomy characteristic of mountainous forest at low latitude and high altitude of subtropical area in Yunnan.In other words,this community could adapt the humid and cold habitat climate that dry and humid season was trenchant in a year.