天山东部木本植物区系分析

Analysis on the Woody Flora in Eastern Tianshan Mountains

[目的]明确天山东部木本植物区系成分。[方法]通过实地调查和查阅参考文献分析天山东部木本植物区系科、属的组成和地理成分。[结果]天山东部共有木本植物31科57属145种。天山东部木本植物区系成分以世界分布科为主,共13科,占总科数41.94%,所占比例较高,说明该区域在地理成分组成方面具有强烈的过渡性。属的分布类型以北温带分布为主,占总属数29.82%。单属科21科,寡种科7科,这种现象与天山独特的生态地理有关,表明该研究区木本植物区系具有复杂性。[结论]研究结果为天山东部木本植物分布区类型和资源的保护提供了理论依据。

[Objective] The aim was to determine woody plants flora in Eastern Tianshan Mountains. [Method] Through field investigation and literature reviewing,families,genera and geographical elements of woody plants in Eastern Tianshan Mountain was analyzed. [Result]The results showed that there were 145 species belonging to 31 families and 57 genera of woody plants in Eastern Tianshan Mountain,13 families in the world distribution,accounting for 41. 94% of the total,which reflected a high ratio and had a strong transition in the areal-types composition. The main geographical composition of these genera was the north temperate,and they accounted for 29. 82% of the total. Among the composition,there was 21 families of one-seeded genera and 7 families of depauperate genera,this phenomenon was related to the unique ecological geography of the Tianshan Mountains and indicated a complexity of flora in the study area. [Conclusion] The results provide theoretical basis for areal-types of woody plants and resource protection in Eastern Tianshan Mountains.