• 论文 •

### 青藏高原哺乳动物地理分布特征及区系演变

1. 1. 中国科学院地理研究所;
2. 中国科学院西北高原生物研究所
• 出版日期:1985-07-15 发布日期:1985-07-15

### THE GEOGRAPHICAL DISTRIBUTION OF MAMMALS AND THE EVOLUTION OF MAMMALIAN FAUNA IN QINGYAI-XIZANG PLATEAU

Zhang Yongzu1, Zheng Changlin 2

1. 1. Institute of Geography Academia Sinica;
2. Northwest Plateau Institute of Biology, Academia Sinica
• Online:1985-07-15 Published:1985-07-15

Abstract: According to recent estimates, the mammalian fauna of the plateau and the surrounding mountains comprises more than 190 species, the majority of which may be assorted into 7 main distributional types and 21 subtypes. The distributional patterns reflect that the plateau proper forms an important obstacle to the spread of the Oriental species. Only in the Hengduan Mountains do they penetrate along the valleys into the southeastern margin of the plateau. On the contrary, the Palaearctic and Centro-Asia-tic elements spread over the plateau in different extents under conditions similar to those of the boreal population.The climatic deterioration occurred in the ice age of the Pleistocene has induced the migration of animals far southwards as a whole in Eurasia. While on the plateau, during the course of upheavel, the migration of animals as a consequence of the retreat of forests was from the interior to the southeastern margin, or rather from the higher to the lower elevations of the mountains.The changes of fauna caused by the upheaval of the plateau can be concluded as follows:1. The forest-living animals and thermorohilic elements retreated to the southeastern margin or to lower altitudes of the pateau;2. The steppe and desert and periglacial fauna invaded the plateau from central and northern Asia;3. Some indigenous and cryophillic species evolved on the plateau proper;4. Faunal composition differs in the east and the west margins of the plateau.