致危因素

中国黄羊资源的分布、数量、致危因素及保护

Distribution , Quantity , Threatening Factors and Protection of Mongolian Gazelle

十种濒危植物的种群生态学特征及致危因素分析

Population Ecological Characteristics and Analysis on Endangered Cause of Ten Endangered Plant Species

种群的致危因素主要是栖息地破坏、人为捕杀、环境污染、自然灾害、繁殖力低等；

The reproduction potentials of these populations are very low due to improper age structures .

指出了鸡类多样性的致危因素，提出了今后保护对策。

It also points out threatening factors for chick category diversity and presents the countermeasures for the protection in the future .

对海南鳽发现地的生境进行了初步调查，分析了海南鳽的致危因素并提出了保护建议。

A survey on the habitat of G.magnificus was conducted , while threats were analyzed and conservation actions was suggested for this species .

《中国濒危动物红皮书》依据我国动物所面临的濒危现状，对我国濒危动物的濒危等级划分、种群现状、致危因素和保护措施等进行了描述说明，首批收录了535种濒危动物。

The " China Red Data Book of Endangered Animals " lists 535 endangered species in China according to their conservation status , as well as describing their degree of threat , population size , threatening factors and approaches to conservation .

野生动植物过度的国际贸易，是野生动植物致危的主要因素之一。

Excessive international trade of wildlife is one of the key factors threatening the endangered species .