内蒙古红花尔基沙地樟子松群落多样性变异研究

根据对内蒙古红花尔基沙地樟子松群落的实地调查数据,应用物种丰富度、Shannon-Wiener指数、Simpson指数、Pielou和Alatalo均匀度指数研究了红花尔基樟子松群落各类型乔木层和草本层的物种多样性,以及演替过程中的群落物种多样性动态特征,分析了物种多样性在不同演替阶段表现差异的原因。结果表明,这4种物种多样性测度指标能有效的表征樟子松的群落特征,以及群落在演替过程中所处的演替阶段和演替方向:樟子松+白桦林群落的物种多样性最高,演替方向明确。除樟子松+山杨林群落的演替方向有随意性外,所有群落类型的演替顶极为樟子松纯林,顶极阶段的物种多样性有降低的趋势。本研究为红花尔基樟子松的可持续利用和保护提供了有益的参考。

Study on Community Variance of Pinus Sylvestris Var.Mongolica Forests on Sand Land at HongHuaerji

Based on the field survey data of Pinus sylvestris var.mongolica community in Honghuaerji area, Inner Mongolia and the method of species abundance, Shannon-Wienner index, Simpson index, Pielou evenness index and Alatalo evenness index, the tree layer diversity and the herb layer diversity of all types are studied, their characteristic development in succession process, the discrepancy reason which the species diversity represent in differ succession process are analyzed. The results show that the four measure indices could effectively reveal the characteristics of Pinus sylvestris var.mongolicacommunity, the phases and the direction are also revealed in differ succession process: the community consisted ofpinus sylvestris var.mongolica+Betula platyphylla has the highest species diversity, its succession direction is distinctness. The succession peaks of all types of community are pure Pinus sylvestris var.mongolica forest exceptthe Pinus sylvestris var.mongolica+Populus davidiana which has random succession direction, and the species diversity has depressed trend in succession peak. This investigation will provide beneficial references for protecting and sustainable using pinus sylvestris var.mongolicaforests.