西藏色季拉山高寒杜鹃群落学特征及其保护

The Community Characteristics and Conservation Strategies of Alpine Rhododendron in Mountains Sejila of Tibet

以西藏色季拉山高寒杜鹃群落为研究对象,通过样地样方调查,分析高寒杜鹃群落的生态学特征。结果表明:杜鹃群落植物共有54种,隶属21科38属。灌木层有14种植物,以薄毛海绵杜鹃、雪层杜鹃、林芝杜鹃和扫帚岩须占优势;草本层有40种植物,主要以岩白菜、珠芽蓼、西藏糙苏等占优势。属的分布区类型方面,以北温带性质为主,其中灌木层北温带类型有6属,占灌木层总属数的75%;草本层北温带类型有11属,占36.67%。研究区植物的生活型以地面芽为主,占总数的35.2%。研究结果可为该区生物多样性保护与可持续利用,杜鹃群落的保护与管理等提供科学依据。

Rhododendron community characteristics in Mountains Sejila of Tibet were investigated using plotquadrat method in the current work. The results indicated that there was 54 species, 38 genera, 21 families in rhododendron community. There existed 14 species in shrub layer, and the dominant species were R. aganniphum var. schiaopeplum, R. niveum, R. nyinchiense and Cazsiope fastigiata. A total of 40 species were observed in herb layer, among which the dominant species were mainly Bergennia purpurascens, Polygonum viviparum, Phlomis tibetica etc. Regional types at generic level mostly were the north temperate type （44.75%）. Six genera were the north temperate type in shrub layer, and 11 genera in herb layer. In plant life-form, hemicryptoyte plant was as high as 35.2%. The obtained results might provide the foundation for the protection and sustainable exploitation of rhododendron resource.