摘要
为了恢复和重建鄂北岩溶地区石漠化土地提供基础数据支撑,研究了鄂北南漳县石漠化生态系统植物群落组成特征和物种多样性。结果表明:(1)石漠化土地物种组成简单,物种丰富度分别为14和15种;(2)乔木层优势种各不相同,轻度石漠化土地为马尾松和栓皮栎,强度石漠化土地为马尾松和杜松;灌木层均以铁仔、毛黄栌和火棘为优势种;草本层同样以白茅为优势种;(3)轻度石漠化土地乔木层多样性指数略高于强度石漠化土地,反之,灌木层和草本层则低于强度石漠化土地;均匀度指数除了灌木层持平外,轻度石漠化土地的乔木层和草本层均匀度指数均小于强度石漠化土地。
In order to provide the basis data for recovery and reconstruction of degraded rocky desertification karst land in northern Hubei Province, this paper studied the plant community characteristics and species diversity from two types of rocky desertification karst mountain ecosystems in Nanzhang county, northern Hubei Province. The results showed that ： （1） The plant compositions were not complicated in two types of rocky desertification ecosystems, which were 14 and 15 kinds; （2）The vegetation of tree layer from the slight rocky desertifica- tion area dominated by Pinus massoniana and Quercus variabilis, and from the serious rocky desertification area dominated by Pinus massoniana and Juniperus rigida; The vegetation of shrub layer in both types of rocky de- sertification areas that consisted primarily of Myrsine africana, Cotinus coggygria vat. pubescens, and Pyracan- tha fortuneana; The dominant species in the herb layer was Imperata cylindrical. （3） The Shannon-Wiener index on the tree layer in the slight rocky desertification area was slightly higher than which in the serious rocky desertification area, while the shrub layer and herb layer occurring reversal; except the shrub layer＇ s Pielou index of each area were equal, the Pielou index on the tree layer and herb layer in the slight rocky desertification area was less than the serious rocky desertification area.
出处
《中南林业调查规划》
2017年第1期21-25,共5页
Central South Forest Inventory and Planning
基金
国家林业局防治荒漠化管理中心石漠化定位站(湖北南漳石漠化定位站)委托项目资助
关键词
石漠化
植物多样性
生态重建
鄂北岩溶山地
rocky desertification
plant diversity
ecological restoration
karst land of northern Hubei
