自从地球上出现了生命以来,随着时间的推移和环境的演变,生物类群也在不断地新旧更迭。虽然漫长的40亿年时间过去了,然而古代的植物遗体以及一些目前仍生存在地球上的古老植物家族的后裔为回顾和推论植物界的发展历史,提供了可靠的依据。九寨沟,因得天独厚的地理环境,成了冰川时期植物“避难所”。不少远古植物在这里幸存下来,传宗接代,延续至今吸引着广大游人,特别是有关方面的科技工作者。 Since the emergence of life on Earth, as time goes by and the evolution of the environment, the taxon is constantly changing. Although a long 4 billion years have passed, ancient plant remains, as well as some descendants of ancient plant families that still exist on Earth now, provide a sound basis for reviewing and deducing the history of plant kingdom development. Jiuzhaigou, due to the unique geographical environment, has become a glacier plant “refuge.” Many ancient plants have survived here, passing on from generation to generation, continuing to date has attracted a large number of tourists, especially those concerned with science and technology workers.