摘要
运用植被生态学与恢复生态学的原理与方法,在衡阳盆地紫色土丘陵坡地以受干扰而退化,经封育后自然恢复至灌丛阶段的植物群落为研究对象,通过在其中设置400个5m×5m共计1hm2的相邻网格样方,对其进行群落学调查。应用聚集指数、平均拥挤度、聚块性指数、格林指数、聚集强度、Cassie指标、方差均值比的t检验等方法,研究了衡阳盆地紫色土丘陵坡地自然恢复灌丛阶段群落主要种群的空间分布格局。结果表明:所有种群的空间分布呈显著的聚集分布,同时,各种群在不同的发育阶段也呈聚集分布,且随发育阶段的进展聚集程度逐渐减小。这主要与物种本身的生态学与生物学特性有关,以及与物种的竞争排斥作用有密切联系。聚集程度的大小在一定的程度上可用来表征植物群落的恢复程度,随着恢复过程的向前发展,种群聚集程度将下降。这将丰富该地区植被生态学与恢复生态学的内容,为衡阳盆地紫色土丘陵坡地生态系统的植被恢复与重建提供了一定的理论依据。
Based on the theories and methodologoies of vegetation ecology and restoration ecology, this study makes a survey from the perspective of community studies. It is conducted in the shrub stage community of the natural vegetation recovery proccee at Sloping-land with Purple Soils in Hengyang, where lhm2 plot with 400 contiguous grid quadrats （5 m^5 m） was designed. The spatial pattern of main populations of natural recovery shrub stage community were measured with the help of 6 indexes, such as clump index, index of mean crowing, index of patching, Green＇s index, the clumping intensity index, Cassie＇s index and variance/mean ratio method as well as. All the spatial pattern of the main populations of the shrub community was clumpy. The results reveal that the distribution of the populations was influenced mainly by their biological and ecological characteristics. In addition, competition among the species would affect the distribution pattern of the populations, With the progress of restoration, the clumping intensity would decrease, so it could be used as an indicator for plant community restoration in some degree. This study will to some degree enrich and broden the vegetation ecology and restoration ecology of this area and provide theoretical basis for the vegetation recovery and reconstruction of ecosystem in Sloping-land with Purple Soils in Hengyang Basin.
出处
《生态环境学报》
CSCD
北大核心
2009年第3期996-1001,共6页
Ecology and Environmental Sciences
基金
湖南省重点课题(62020608001)
关键词
灌丛群落
分布格局
衡阳盆地
shrub community
spatial pattern
Hengyang Basin
作者简介
作者简介：杨宁（1974年生），男（苗族），讲师，博士生，主要从事植物生态学及恢复生态学的教学与研究。E-mail：yangning8787@sina．com
通讯作者：邹冬生，教授，博士，博士生导师，主要从事紫色土荒山坡地生态植被恢复研究。E-mail：zoudongsheng2@sina.com
