植物物种濒危程度研究进展

Progress of Research on Endangered Situation of Plant Species

生物多样性的减少,受到世界各国的普遍关注,物种保护成为全球性问题。评定物种的濒危状况将为评定保护级别提供依据,是开展物种保护工作的基础。学者们在积极开展濒危物种的濒危等级评定工作的同时,探索着濒危等级划分方法。绝大多数学者都采用濒危系数来划分濒危等级评定的方法。先选定评价指标、分级和赋值,制定濒危状况评价体系,然后用计算濒危系数、划分濒危等级。濒危系数评定指标的选择目前还没有统一的规定和标准,各学者根据研究对象和研究目的自行选择采用。评定指标选择数量方面,采用4-6个指标的较多见。濒危物种评定体系虽然采用了数量评定方法,但仍然存在着较大的人为因素。评定指标的确定是人为的,各指标分级和赋值是人为的,因此计算出来的结果中也包含着人为因素。有些学者已认识到这一点,对赋值分数作了调整。濒危等级划分方面,有多种方法和标准,但大同小异,名称各异。

The reduction of biodiversity is universal paid attention by all countries in the world. Species protection becomes a global problem. Evaluation of the endangered species will provide a basis for assessing levels of protection, which is the foundation of the species protection. The scholars act in work of endangered grading of endangered species, and explore the endangered classification method. The majority of scholars adopt the coefficient of endangerment as the way of assessment endangered grading. First choosing assessment index, classification, and making the endangered situation of the development evaluation system, and then calculated endangered coefficient and divided endangered grade . Now, choosing the assessment index of endangered coefficient isn＇t uniform requirements and standards, and scholars choose assessment index according to their object and purposes. Most of scholars adopt 4-6 indicators. Although the assessment system of endangered species adopts the way of quantitative evaluation, but there are still major human factors. The assessment index, indica- tors of classification and assignment are determined to be in man-made, and then the results also include human factors. Some scholars have recognized the point, assignment scores have been adjusted. In endangered classification, there are a variety of methods and standards, but which are very much the same in real, their name are different.