天津市蓟县八仙山自然保护区 木本植物区系的研究

八仙山自然保护区,位于天津市蓟县东北部山区,面积1049.3hm~2。经调查,共有高等维管植物90科、239属、364种,其中木本植物44科、82属、123种。研究结果表明,该区范围虽小,但地理成分复杂,与世界区系有广泛的联系,木本植物区系有13个类型,其中北温带分布属41.5％、东亚分布属10.9％、东亚与北美间断分布属及泛热带分布属均为9.7％、中国特有分布属4.9％,明显温带成分占优势,并具有一定的热带亚热带成分。

Research on the Woody Plant Zone in Baxian Mountain Natural Protective Area of Ji Country in Tianjin

Baxian Mountain Natural Protective Area which is about 1 049. 3 hectares is located in the mountainous area of northeastern Ji Country in Tianjin. The result of investigation shows that there are 90 families, 239 genera and 364 species of vascular plants, in which include 44 families, 82 genera and 123 species of woody plants. And the research result shows that geographical components of the area are complex though its scope is small. Plants in this area have extensive connection with world wide plant zone, in which the north temperate distribution genus is 41. 5 % , the east Asia is 10. 9 % , the interrupted distribution genus between east Asia and north America and pantropical genus are both 9. 7 % , and the Chinese special distribution genus is 4. 9 % , It is obvious that the plants of temperate zone are predominant and some tropical and semitropical plants are also included in the area.