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当前位置: 首页 > 文章 > 云南榧树群落及其植物区系特征研究 西部林业科学 2015 (3) 37-44
Position: Home > Articles > Floristic Characteristics and Flora of Torreya yunnanensis Community Journal of West China Forestry Science 2015 (3) 37-44

云南榧树群落及其植物区系特征研究

作  者：
侯昭强;文光玉;周丹;李敏敏;杜凡
单  位：
西南林业大学
关键词：
云南榧树;群落结构;植物区系;次生度
摘  要：
对云南榧树所处的群落结构及生境进行调查,结果显示,云南榧树群落分布海拔2 160~2 970 m,在16个样方累计6 400 m2的样方面积中有维管植物90科199属258种,其中被子植物74科173属225种,裸子植物3科8属9种,蕨类植物13科18属24种。云南榧树所处群落为针-阔混交林,组成群落的乔木层物种48种,灌木层物种68种,草本层物种116种,层间植物最少,有26种;群落中乔木层重要值最大的是云南榧树,为15.58%,青冈、华山松、光叶高山栎、云南铁杉的重要值依次减小。群落种子植物属、种分布区成分都以温带地理成分为主,分别有104属、217种,占总属数的63.80%,占总种数的84.11%。群落中高位芽植物有83种,占32.17%,其中以矮高位芽为主,有48种,占18.60%,地面芽有76种,占29.46%。说明云南榧树群落与温带区系联系更为紧密;2个中国特有属,83个特有种,说明该区域特有性较低;次生物种116种,群落次生度高达43.80%,可见该区域的云南榧树群落次生性很高。
译  名：
Floristic Characteristics and Flora of Torreya yunnanensis Community
作  者：
Hou Zhao-qiang;Wen Guang-yu;Zhou Dan;Li Minmin;Du Fan;Southwest Forestry University;
关键词：
Torreya yunnanensis;;community structure;;flora;;secondary index
摘  要：
This study investigates the structure and habitat of Torreya yunnanensis communities through an analysis of 16 plots totaling 6 400 m2,distributed in the altitude range of 2 167 ~ 2 975 m. According to the survey results,there are 258 vascular plants in total,belonging to 90 families and 199 genera,of which 225 kinds are angiosperm belonging to 74 families and 173 genera,9 kinds are gymnosperm,belonging to 3 families and 8 genera,and 24 kinds are ferns,belonging to 13 families and 18 genera. Torreya yunnanensis communities are located in mixed broadleaf-conifer forests,in which there are 48 arbors,68 shrubs,116 herbs and 26 interlayer species.The community tree layer with the highest value is Torreya yunnanensis, with a value of 15. 58, while values steadily decrease with Cyclobalanopsis glauca,Pinus armandii,Quercus pseudosemecarpifolia,and Tsuga dumosa. Community seed plant genera and species distribution are dominated by temperate elements,with 104 genera( 63. 80 % of the total) and 217 species( 84. 11 % of the total),83 species of community phanerophytes( 32. 17 % of the total) dominated by 48 species of dwarf phanerophytes( 18. 60 % of the total) and 76 species of ground shoots( 29. 46 % of the total). In terms of temperate flora in Torreya yunnanensis communities,there are2 Chinese endemic genera and 83 endemic species,indicating that the region has low endemism,as well as 116 kinds of secondary species( or up to 43. 80 % of the total). The region of Torreya yunnanensis is thus heterogeneous and contains high levels of secondary species.

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