广东天井山云锦杜鹃种群及其所处群落特征

应用样方调查法,研究广东天井山云锦杜鹃群落的种类组成、结构特征、物种多样性特点。在2 000 m^2的调查样方中,共记录胸径≥2.5 cm的立木701株,隶属于14科23属32种;该群落以山茶科、樟科和蔷薇科植物最为丰富,群落的优势种为假地枫皮,其次为云锦杜鹃和拟赤杨;云锦杜鹃为该群落的亚优势种,具稳定型种群结构,以Ⅱ-Ⅲ级小树较为丰富,幼苗较少,自然更新不良。建议通过适度的人工干预,促进天井山云锦杜鹃自然种群的自然更新,同时加强迁地保护,促进云锦杜鹃种质资源的保护与利用。

Population and Community Characteristics of Rhododendron fortunei at Mount Tianjing of Guangdong Province

The species composition,structure characteristics and species diversity of Rhododendron fortunei communities at Mount Tianjing,Guangdong Province were studied by plot survey method.701 standing trees with ≥2.5 cm DBH that belonging to 32 species,23 genera,14 families were recorded in 2000 m^2 sampling plot.The R.fortunei communities were rich in plants from Theaceae,Lauraceae and Rosaceae families,whose dominant species were Illicium jiadifengpi,Rhododendron fortunei and Alniphyllum fortunei.Rhododendron fortunei was the subdominant species in the studied communities with stable population structure,where there were dominantly the small to medium sized trees with DBH between 7.5-17.5 cm,whereas there were few young seedlings indicating the poor natural regeneration.The natural regeneration of Rhododendron fortunei populations with appropriate man interference integrated with ex situ conservation was proposed in order to promote conservation and utilization of R.fortunei resource.