摘要
对滇中高原昆明金殿滇油杉群落进行了调查，分析其物种组成和各主要物种生态位，并绘制了建群种滇油杉的生命表和存活曲线。结果表明，昆明金殿滇油杉群落共有种子植物70种，隶属38科63属。生活型分析表明高位芽植物占比最大，为60％，说明该地区气候大多时候是温湿型。科属的区系分类结果表明滇油杉群落以热带科和温带科为主，其中热带科最多。属则以温带属最多，热带属次之。表明滇油杉林的区系成分以热带起源为主，属于亚热带植被即暖温性针叶林。生态位的宽度重叠结果表明，在乔木层、灌木层、草本层中具有最宽生态位的物种分别为滇油杉、小铁子和紫茎泽兰。各层重叠宽度主要集中在0.38～0.70、0.00～0.57和0.14～0.97之间。这表明灌木层各物种生态分化较大，可能对群落物种共存有重要作用。滇油杉生命表和存活曲线表明，当滇油杉种群在达到既定年龄，即位于龄级8后死亡率才明显增加。
Survey on Keteleeria evelyniana community of Jindian located in central Yunnan Pleteau was conducted for understanding its species composition and the ecological niche, and the life table and the survival curves of Keteleeria evelyniana was also made in this study. The results showed that Keteleeria evelyniana community in the study site was composed by 70 seed plant species belonging to 38 families and 63 genera. The life form showed the high bud plants had the largest proportion （60%） and this indicated that this region were humid climate type Flora classification resuhs showed that the families of Keteleeria evelyniana communities mainly belong tropical and temperate types, and families of tropical were the major part. In term of genera, the temperate type were the major part compared with tropical type, which means that this community was mainly originated from tropical place, and it belong to the sub-tropical vegetation, namely warm temperate coniferous forest. Niche breadth and overlap analysis showed that Keteleeria evelyniana, Myrsine africana and Ageratina adenophora had the widest ecological niche in tree layer, shrub layer and herbaceous layer respectively. The overlap width of each layer were mainly distributed in 0. 38 - 0. 70, 0.00 - 0. 57 and 0. 14 - 0. 97. This indicated that the species of shrub layer had significant ecological differentiation, and this might play an important role in the species coexistence of this community. The life table and survival curve showed that the population mortality rate was significantly increased when Keteleeria evelyniana community reached the 8th age-class.
出处
《西部林业科学》
CAS
2016年第6期25-32,共8页
Journal of West China Forestry Science
关键词
滇油杉
生活型
区系分析
生态位
种群动态
Keteleeria evelyniana
life form
flora analysis
ecological niche
population dynamics
