柴达木盆地植物区系分析及其形成的探讨

An Analysis on the Flora and the Research on Forming of that in Tsaidam Basin

柴达木盆地植物区系以古地中海成分占主要地位．本区系中的中亚成分同样是古地中海区系的一部分．其中的温带成分是由华夏植物区系发展起来的．并与安加拉区系有联系．区系中的喜马拉雅成分是当地起源的．它们是本区系中的年青成员．无疑是华夏区系的后裔．而一定数量的特有成分则表明了区系的特殊性．柴达本盆地的植物区系虽然经历了干旱到湿润、湿润到干旱的反复交替．但有充足的抱粉资料证明：现代的柴达木盆地干旱植物区系在第三纪时就已形成．且一直处于干旱、寒冷的气候控制之下．

The element of Tethys is very important in the flora of Tsaidam Basin. Since the regression of Tethys and the rising of elevation, the Climate of environment had become dry and cold, it has formed in this locality. identically, the element of Central Asia is a part of Tethys flora too. The element of temperate in this flora was formed by Cathayslan flora, and connected with Angola flora. The element of Himalaya was formed in this locality , It is the J bungest nelnber in this flora, indubltatlvely. it is the descendants of cathaysian flora. The being of the element of Endemic to China special properties of this flora.Although the flora in Tsaidam Basin, had undergone from aridity to moisture and from moisture to aridity, exchanging repeatedly, there are many evidences of pollen, which fully prove: the xerophytic flora from modern Tsaidarn Basin had formed in Quaternary, and was controled straight by the dry and cold climate.