云南肉豆蔻植物群落结构特征

Structure Characteristics of Myristica yunnanensis Community in Xishuangbanna of Yunnan

2016年,采用样地法对西双版纳热带雨林云南肉豆蔻植物群落乔木层、灌木层、草本层物种多样性和植物群落结构进行调查。结果表明,云南肉豆蔻植物群落内共131个物种,分属于58科104属。其中高位芽植物112种,地上芽植物4种,地面芽植物15种,高位芽植物占总物种85.5%,占绝对优势;云南肉豆蔻植物群落68.71%为中型叶,16.79%为大型叶,小型叶及其它叶级只占14.5%。云南肉豆蔻植物群落物种组成非常丰富,其乔木层、灌木层和草本层Simpson指数(Ds)分别为0.9591、0.9643、0.8781,Shannon-Wiener指数(H')分别为5.5313、5.2261、4.1060,Pielou均匀度指数(J)分别为2.8446、2.9512、2.4167。群落优势种或建群种为粗叶木(Lasianthus hookeri)、染木树(Saprosma ternate)、望天树(Parashorea chinensis)和云南肉豆蔻(Myristica yunnanensis)等4个树种。

Adopting plot method,the structure characteristics and biodiversity of tree layer,shrub layer and herb layer of Myristica yunnanensis community in tropical rain forest of Xishuangbanna was investigated.Besides the species composition,a series of parameters such as DBH,ground diameter and crown size were measured and analyzed.Totally 131 plant species were recorded,85.5 % of the total were phanerophytes,the dominant status of phanerophytes indicated the hot and humid condition were benefit for the growth of plant.The species in Myristicaceae yunnanensis community was very rich,belonging to 58 families and 104 genera.Different species varied significantly in status and role within the community.The dominant and constructive species were Lasianthus chinensis,Saprosma ternata,Parashorea chinensis and Myristica yunnanensis.