中国帕米尔高原种子植物属的区系研究

中国帕米尔高原座落于新疆西南部,北纬37°-39,°东经73°-76,°面积约30000km2,区内平均海拔约4000m,拥用种子植物963种(包括变种),分属于59科303属,其中裸子植物3科3属12种,被子植物56科300属951种。种子植物属的区系特征如下:1)单种属、少种属占极高的比例,属种比值偏高,植物区系组成复杂,2)属级水平分析表明,本区植物区系以北温带为主的温带成分占主导地位,仅有13个从热带分布区延伸到温带的热带属,且在本区所含种类极少,但丰富了本区植物区系的组成,3)植物区系较为年轻且有一定的衍生性,4)高原生态因子的作用,使本区植物获得了适应寒冷和干旱的特性。

Study on Flora of Genera Seed Plants in the Pamirs China

The area of Pamirs is about 30000 km2 where there are 963 species of seed plant belong to 59 families and 303 genera,3 families 3 genera 12 species of gymnosperm,56 families 300 genera 951 species of angiosperm.The floistic characteristics of genera are summarized as follows:1) The ratio of single-species and minor-species genera is very high, the polarization of genera is intensity,the composition of floristic is complex.2)Analysis of the genera distribution pattern demonstrated that they mainly consist of north temperate elements,except 13 genera which belong tropical to distribution to temperate,and only a few species of them were found in this area.3) The flora of the area is young and derivative.4)The species obtained the adaptive characters to resist the frigidity and the aridity under selection of the altiplano ecological factors.