摘要
在群落调查的基础上,通过生态位宽度与生态位重叠指数,结合典范对应分析(CCA),研究了广西平果喀斯特山地主要植物种群在植被恢复过程的4个群落中的生态位梯度变化。结果表明:(1)各主要种群的生态位宽度在不同群落中随种类组成的变化而发生改变,这种改变反映了喀斯特山地植被的恢复效果;(2)主要种群生态位宽度的典范对应分析表明,岩石裸露率与4个群落第一排序轴的相关性都比较强,各种群的生态位宽度在不同资源位上表现不一;(3)各群落优势种群间的生态位重叠程度不高,种群间资源利用差异显著、利用性竞争不强,群落处于演替阶段,群落物种组成不稳定。种群间生态位重叠值的大小与种群生态位宽度间不呈明显相关性。
Based on field survey in the karst mountains in Pingguo county, southwest Guangxi province, by using niche breadth, niche overlap and canonical correspondence analysis （CCA）, the ecological gradient changes of 25 main species＇ niche in four communities were investigated in the process of vegetation restoration. The results show that （1） the niche breadth of main populations varied with species composition of community, which reflected the effects of vegetation restoration in karst mountains in the study area; （2） the findings of CCA indicate that the bare rock ratio highly correlated with the first sorting axes of the four communities, the main populations＇ niche breadth at different resource states were different respectively; （3） the niche overlaps of 25 main populations in the four communities were all not higher, which revealed that the resources utilization of the main populations was significant difference, and the resources utilizing competition was not strong. The secondary communities stayed in the stages of succession, and the community composition was not stable. The intra-population niche overlap was not obviously related to the niche breadth.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2014年第12期96-101,116,共7页
Journal of Central South University of Forestry & Technology
基金
广西优良用材林资源培育重点实验室自主课题(12B0401)
关键词
山地植被恢复
喀斯特山地
生态位宽度
生态位重叠
典范对应分析
广西平果县
vegetation restoration in hilly area
karst mountain area
niche breadth
niche overlap
canonical correspondence analysis
Pingguo county of Guangxi
