2024年7月25日 星期四
银缕梅物种濒危度的定量分析
Quantitative analysis of risk size of plant species: a case of Shaniodendron subaequale M. B. Deng , H. T. Wei et X. Q. Wang
1994年 第3卷 第3期 页码[1-8]    下载全文[1MB]  
摘要

采用二级模糊综合评判法进一步分析现存个体和居群数均极少的中国金缕梅科一新属种──银缕梅的物种濒危度。首先挑选对小种群绝灭有影响的随机干扰因素,建立了包括20个评价指标在内的因素集。然后通过对评价指标定量化和权分配一系列处理,并通过最初一、二层的综合评判,求得濒危度和保护等级,进而确定物种的濒危状态及其在省级和国家级的保护序次。研究结果表明,二级模糊综合评判的方法十分灵敏,可操作性强,它能比较准确地反映植物物种实际濒危状况。

Abstract

The risk size of Shaniodendron subaequale M. B. Deng, H. T. Wei & X. Q. Wang, the new species of new genus of Hamamelidaceae, with less number in both existing individuals and populations was further analysed by using the method of Fuzzy Two-stage Comprehensive Evaluation and Fuzzy Two-type Subset Weight Allocation. Firstly, the factor set of stochactic perturbations including 20 evaluation indexes which affected the extinction for small population was established. And then, the risk size and the conservation grade in the province and throughout the country were calculated by the index quantification, weight allocation and initial 1~2 ladder Fuzzy Comprehensive Evaluation. The result shows that this method is sensitive and operable in reflecting the actual endangered situation of plant species.

关键词濒危度; 优先保护; 银缕梅; 综合评判值;
Key wordsrisk size; prior conservation; Shaniodendron subaequale M. B. Deng, H. T. Wei et X. Q. Wang; comprehensive evaluation value
作者魏宏图,金念慈
所在单位江苏省中国科学院植物研究所
点击量994
下载次数746
基金项目国家自然科学基金,江苏省科学技术委员会资助;