长江三峡库区第四纪哺乳动物群及生态环境的演替

Succession of Quaternary Mammalian fauna and Eco-Environment in the Yangtzi River Gorges reservoir area

根据长江三峡库区范围已发现的 2 8个第四纪哺乳动物化石点资料 ,应用系统分析法 ,对其形成时代反复论证后 ,通过性质比较 ,确认该区第四纪哺乳动物群性质为热带—亚热带森林为主的东洋界大熊猫动物群 ,其演替过程可分为 5个阶段 .其演替原因是环境的变化 ,主导因素是造貌运动和气候变化 ,但到中晚全新世则为人类活动 .

On the bases of data studied 28 Quaternary mammalian fossils discoved from the Yangtzi River Gorges reservoir area, used the system analysis method, the paper proves over and over again their geologic ages and nature, the affirmes the nature of this Quaternary mammalian fauna in the area that is Indo-Malay Fauna taking genus panda (Ailuropoda) as the special type animal lived in forest of torrid-subtorrid zone, may be named Ailuropoda Fauna. The succesion of the Fauna may have 5 stages: small species panda ( A. microta) Fauna (Q\-1); fossil's type panda Fauna (Q\-2+Q\-3), diveded into A. melanoleuca fovealis-Hyaena sinensis Subfauna (Q 2) and A.me. baconi-Crocuta ultima Subfauna (Q 3); modern type panda ( A.me.melanoleuca) Fauna (Q 4), diveded into Rhinoceros sondaicus-Canis familiaris Subfauna (Q\+\+2\-4) and field-domestic (present type) Subfauna (Q\+\+3\-4). The cause of the succesion is environmental change in the area. The dominant factor of the change is make-landforms tectonic movement and climate change in Quaternary, but mankind move about in the late Honcene.