摘要
分别用Bo ltzm ann统计热力学熵、Shannon信息熵、联合熵分析了秦岭南坡火地塘林区几个样地的熵值。结果表明,在无过度人为干扰情况下,熵值随海拔升高而递减。熵值不仅可作为物种多样性、丰富度的评价指标,而且可以说明系统的稳定性及演替方向。
The development and evolution of the concept of entropy were reviewed. The entropies of bio-diversity of several sampling plots in Huoditang Forest Farm were calculated by using Boltzmann entropy, Shannon entropy and joint entropy. The results showed that without over disturbance of human beings, entropies of bio-diversity decreased along with the increase of altitude. Within the same community moreover,the entropy of herbage layer was the highest,then shrub and tree layer,indicating that the entropies of bio-diversity not only decreased along with the increase of altitude,but also decreased in the order of herbage,shrub and tree layer within the same community. It was concluded from the results that entropy can be used not only the index for the assessment of bio-diversity and bio-richness,but also for the assessment of bio-stability and evolution direction.
出处
《西北林学院学报》
CSCD
北大核心
2006年第6期35-37,共3页
Journal of Northwest Forestry University
关键词
熵
生物多样性
评价指标
entropy
biodiversity （species diversity）
assessment index
