摘要
对长苞铁杉林林隙梯度上物种α多样性及β多样性进行了研究。结果表明:从林隙中心到非林隙的微观空间异质性梯度上,乔木层及灌草层物种α多样性呈现下降趋势,物种均匀度变化均呈现两端高中间低的现象;乔木层从林隙近心区到扩展林隙区物种β多样性最小,从林隙中心区到近中心、扩展林隙区到林隙边缘区及林隙边缘区到非林隙区这3个过渡区β多样性依次升高;灌草层β多样性从林隙中心到林隙近心区最小,而在其它3个过渡区无明显差异。
The α diversity index and β diversity index were used to study biodiversity in gap gradient of Tsuga longibracteata forests. Results showed that α diversity of the arbor layer and shrub layer gradually decreased from the gap center area to non - gap area, and the species evenness was high on the borders and low in the center. The least β diversity of arbor layers appeared at areas from near center to expanded gap, and the β diversity gradually increased in the following sections： from gap center to near center, expanded gap to gap border, and gap border to non -gap. While the least β diversity of shrub layer was at areas from gap center to near center, and that of the other three transitional areas appeared no great differences.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2005年第5期53-54,58,共3页
Journal of Northeast Forestry University
基金
福建省教育厅科研基金资助项目(K02047)
福建省科技厅重大资助项目(2001F007
2001Z025)。
关键词
林隙梯度
Α多样性
Β多样性
长苞铁杉
Gap gradient
α diversity index
β diversity index
Tsuga longibracteata
