澜沧江自然保护区云南铁杉群落特征研究

Study on Tsuga dumasa Community Characteristics in Lancangjiang Nature Reserve

采用样方调查的方法,对澜沧江自然保护区云南铁杉林进行群落特征研究,结果表明:群落内共有维管植物48科70属99种及变种,蕨类植物5科6属8种,种子植物43科64属91种;壳斗科、兰科、山茶科、菊科和杜鹃花科为群落主要组成科;群落垂直结构明显,可分为乔木层、灌木层、草本层和层间植物;群落以中小高位芽植物(42.42%)占优势,叶级以中型叶为主(30.30%),叶片特征以单叶(81.82%)、革质叶(53.54%)、全缘叶(64.65%)、渐尖叶(41.41%)为主;对群落内云南铁杉树高、胸径和株数百分比进行分析,发现群落具有一定的波动性.

The community characteristics of the Tsuga dumasa forest in Lancangjiang Nature Reserve were studied based on the investigation of 4 sample plots （with total area of 2 000 mE）. The following results were concluded ： There were 99 species and varieties of vascular plants, which belonged to 70 genera and 48 families ; 8 species of pteridophytes belonging to 6 genera, 5 families ; 91 species of spermatophytes belonging to 64 genera, 43 families. The dominant families that consisted of the community were Fagaceae. Orchidaceae, Theaceae, Compositae and Ericaceae. The vertical structure of the community was remarkable, which could be divided into arbor layer, shrub layer, herb layer and the interlayer. In this community, plants of micro - phanerophytes and meso - phanerophytes occupied the dominant position, accounting for 42. 42%. The dominant leaf size was microphyll （30. 30% ）, and the leaf characteristics of the community were mainly composed of simple leaf （81.82%）. scleroohvll （52.54%）, entire leaf （64.65%）, and acuminate leaf（41.41% ）. It was indicated by data analyses on tree height, BHD and number of individuals of Tsuga dumasa that there was some fluctuation with the community structure.