凉水国家级自然保护区维管植物区系和地理成分分析

摘要

Based on the field investigation, plant specimens collection and identification, and reference literature materials,the flora and geographical components of vascular plants in Liangshui National Nature Reserve were analyzed. The results showed that there were 440 species belonging to 246 genera and 78 families in Liangshui National Nature Reserve,among which,23 species ferns belonged to 15 genera and 10 families,7 species gymnosperms belonged to 4 genera and 1 families, and 410 species angiosperms belonged to 227 genera and 67 families. There were 22 dominant families,such as Asteraceae,Rosaceae and Ranunculaceae and 8 typical families including Betulaceae,Salicaceae and Pinaceae. Dominant gen-era and typical genera belonged to 86 genera and 15 genera. There was no real single families but two single genera in the reserve. The geographical composition mainly belonged to temperate type with 431 areal-types of species,belonging to 185 genera and 23 families, which ( not including the widely dis-tributed type) accounted for 29.49%,74.80% and 97.95% of all the families,genera and species respectively. Plants in this reserve had obvious temperate nature,which had close affinity with Asia,but not too much with tropic.%根据野外实地调查、植物标本采集和鉴定、文献资料借鉴,对凉水国家级自然保护区维管植物进行植物区系和地理成分分析.研究表明:凉水国家级自然保护区内共有植物78科246属440种,其中蕨类植物10科15属23种,裸子植物1科4属7种,被子植物67科227属410种.菊科、蔷薇科、毛茛科等22科为优势科,桦木科、杨柳科、松科等8科为表征科;优势属和表征属分别为86属和15属.保护区植物不存在真正意义上的单种科,但有2个单种属.在地理成分中温带分布型有23科185属431种,分别占(不含广布型)科、属、种总数的29.49%、74.80%和97.95%;保护区植物与亚洲交流较多,与热带交流较少,具有强烈的温带性质.