自然保护区评价的“自然度”方法

THE METHOD OF NATURAL DEGREE IN NATURAL RESERVE EVALUATION

自然度是指保护区保存自然环境本底性质的程度,可用植被性质指标及珍稀物种指标来量度。考虑到由于珍稀物种保护级别不同,其保护价值也有较大差异,因此对珍稀物种指标进行加权。为了便于对比和评价,将自然度分为高、中、低三个等级,不同等级的自然度分别反映出植被原生性、珍稀物种多样性及保护价值的差异。

The 'Natural degree' is the extent to keep the original essence of natural enviroment in the reserve. We can use the quota of vegetation nature and the quota of valuable and rare species for measurement. But because of the protective classes are different of the different valuable and rare spe- cies, their protective value are differnet too. So that quota must be wei- ghted. For the sake of comparison and evaluation, Natural degrees are divided into 3 classes, i. e. high, middle and low natural degree. The Natural degrees of different classes, reflect the differences of the vegetat- ion primitivity,the diversity of valuable and rare species,and the prot- ective values.