珍稀植物群落多样性及稳定性分析

对万木林自然保护区3种珍稀植物观光木(Tsoongiodendronodorum)、沉水樟(Cinnamo-mummicranthum)、罗浮栲(Castanopsisfabri)群落乔、灌层及群落总体的物种多样性、群落稳定性进行比较分析,同时探讨了群落物种多样性与稳定性的关系.结果表明:观光木群落、罗浮栲群落中物种多样性指数为乔木层>灌木层;沉水樟群落物种多样性指数为乔木层<灌木层;群落总的物种多样性指数比较为罗浮栲群落>观光木群落>沉水樟群落.群落稳定性分析结果表明3群落均为远离稳定状态的不稳定群落,其相对的稳定性比较是沉水樟群落>罗浮栲群落>观光木群落,表现出与群落物种多样性不同的趋势.这种格局的产生是珍稀优势种植物本身的生物学特性和环境因素共同作用的结果.

Reasearch on the Bio-diversity and Stability of the Rare Plant Communities

The species bio diversity of the tree layers,the shrub layers,and the whole communities in three rare plant Tsoongiodendron odorum,Cinnamomum micranthum,Castanopsis fabri dominated communities were comparably analyzed. The community stability of those communities was investigated,too.At the same time,the relationships between species biodiversity of community and its stability were explored in this paper.The results showed that the species diversity index H and R of the tree layers in the Tsoongiodendron odorum community,Cinnamomum micranthum community were higher than that of the shrub layers,but to the Castanopsis fabri community,the fact was reversed.The species diversity of the whole communities were that the Castanopsis fabri>Tsoongiodendron odorum>Cinnamomum micranthum.However,the community stability of the three communities showed the different tendency,that was Cinnamomum micranthum>Castanopsis fabri>Tsoongiodendron odorum.The causes of this patter were the corporated action of the biological characteristic of the rare plants and the environmental factors.Those researches were proposed to protect the rare plants,and so it can reach the goal of sustainable management.