广西植物2017，Vol.37Issue(4)：434-441,8.DOI:10.11931/guihaia.gxzw201604025
七姊妹山自然保护区黄杉林群落学特征
Coenological characteristics of Pseudotsuga sinensis forests in Qizimei Mountains Nature Reserve
摘要
Abstract
Pseudotsuga sinensis is the second-class state protected plant, it is China's unique tertiary relict precious species and mainly distributed in subtropical mid-mountain zone.In order to better protect the remnant and endangered P.sinensis, we investigated original P.sinensis forests in Qizimei Mountains Nature Reserve using Braun-Blanquet phytosociological and typical plots methods and analyzed their community characteristics.The results showed that the P.sinensis community contained 52 vascular plants belonging to 24 families and 38 genera in 2 300 m2 sample plots.The P.sinensis community was mainly composed of Ericaceae, Leguminosae, Aaliaceae, Fagaceae species and so on.Moreover, the life form composition of the P.sinensis community revealed that Phaenerophytes had an absolute dominance, besides, Phaenerophytes and Hemicryptophytes accounted for 76.9%, 13.5% respectively.Chamaephytes and Geophytes were fewer plants, occupied small proportion.Therefore, the life form spectrum was roughly "L" type.The analysis of community importance values showed that the P.sinensis was absolutely dominant in the tree layer and its importance value was 53.6, and it was constructive species in the community.Moreover, the Quercus phillyreoides and Pyrrosia lingua were the dominant species in shrub layer and herb layer, and their importance values were 24.0, 54.8 respectively.Based on our analysis, we found that the species diversities indexes of the Pseudotsuga sinensis community were low in general.In addition to species evenness index, species dominance index, species diversity index and species richness index had the same patterns: species diversity index in shrub layer was the highest, the tree layer was the second, and the herb layer was the lowest.Based on the topographical conditions, we knew that the species diversity index exhibited that the upper slopes was greater than the ridges regularly.Population age structure showed that the P.sinensis had an L-shaped distribution, which implied the community of P.sinensis was an increasing population type.So we can conclude that P.sinensis will always be a dominant species in Qizimei Mountains Nature Reserve in a certain time.Furthermore, with the appearance of forest gaps, the P.sinensis community can be updated continuously.关键词
黄杉/物种组成/生活型谱/物种多样性/年龄结构/七姊妹山自然保护区Key words
Pseudotsuga sinensis/species composition/life-form spectrum/species diversities/age structure/Qizimei Mountains Nature Reserve分类
农业科技引用本文复制引用
熊斌梅,汪正祥,田凯,张娥,李泽,李士超,彭宗林..七姊妹山自然保护区黄杉林群落学特征[J].广西植物,2017,37(4):434-441,8.基金项目
国家自然科学基金(41471041) （41471041）
环保部生物多样性保护专项(2014)[Supported by the National Natural Science Foundation of China (41471041) （2014）
Special Fund for Biodiversity Conservation of Ministry of Environmental Protection (2014)]. （2014）
