However, many rare and endangered plants are on the verge of extinction due to serious eec-environmental damage caused by impact of nature and human factors in recent years.
由于近年来自然和人为等因素的影响，使生态环境遭到严重破坏，许多珍贵稀有植物濒临灭绝。
According to standard of minimum viable population, the ex-situ conservation of 73 rare and endangered plants are effective.
按照最小存活种群的标准，该园有73种稀有濒危植物迁地保护有效。
Of which 39 rare and endangered medicinal plants accounted for 63.93% of the endangered medicinal plants in Changbai Mountain.
其中珍稀濒危药用植物39种，占长白山区珍稀濒危药用植物总数的63·93%；
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