【摘要】 广东近年发现许多地下埋藏的古树。经过14C年代测定和树种鉴定,获知其死亡年代最早的距今已1万多年,新的仅百余年。死亡树种有属暖温带的山桐子树和隆兰,也有热带南亚热带的青皮树和水松树等,反映了古代的气候变化。树洞黏附的微体生物和贝壳,反映了海陆环境变迁。用古树纤维素的碳、氧元素分析,亦获得相同的结果。这表明古树是古代气候与环境变化的很好实物证据。更多还原

【Abstract】 Many underground embedded ancient trees are unearthed in Guangdong Province in recent years.The earliest death time of these ancient trees is about ten thousands years before present,and the latest is only several hundreds years,which can be proved by（）¹⁴C dating and determined by species.These tree species include not only Idesia polycarpa,Magnolia nitida belonging to warm temperate zone,but also Vatica astrotricha and Glyptostrobus pensilis belonging to tropical and subtropical zone,which reflect the changes of climate.And the micro biota and shell adherent to the tree holes reflect the land-sea environment evolutions.The same result can be realized through analyzing the carbon,oxygen elements of ancient trees’cellulose.This shows that the ancient trees are examples of the changes of climate and environment in ancient times.更多还原