安徽升金湖自然保护区湿地草本种子植物区系研究

对安徽升金湖湿地自然保护区的湿地草本植物区系进行了初步分析，研究表明，该区共有湿地草本种子植物59科173属275种，以禾本科（Gramineae）、菊科（Compositae）、莎草科（Cyperaceae）等为优势科，而以菱科（Trapaeeae）、三白草科（Saururaceae）、茨藻科（Najadaceae）等为该植物区系的表征科；以蓼属（Polygonum）、苔草属（Carex）、蒿属（Artemisia）等为优势属，但属的组成较为分散，寡种属和单种属占总属数的97．69％，表明该区植物成分较为复杂，物种多样性指数较高。从分布区类型看，科以热带成分占明显优势（30．52％）；属泛热带分布属最多（21．39％），北温带分布成分次之（13．87％），总体上温带成分（38．73％）略多于热带性成分（34．10％）。表明该植物区系地理成分复杂，过渡性明显，分布区类型多样，具有热带、亚热带与暖温带的多重性质，但以亚热带性质为主。

Herbaceous Seed Flora of Wetlands in Shengjin Lake Nature Reserve of Anhui Province

The flora of wetland herbage in Shengjin Lake Nature Reserve in Anhui was analyzed in the paper.275 species,which belong to 173 genera in 59 families were in this reserve totally.The preponderant families include Gramineae,Compositae and Cyperaceae.But the symbol families of the floristic wer Trapaceae,Saururaceae and Najadaceae.The preponderant genera include Polygonum,Carex and Artemisia.The percentage of The genera which include only 1 species or 2-5 species were account for 97.69%.The result indicated that the plants composing are complex and the biodiversity is high in the area.At family level,the proportion of the tropic type is bigger than others and reached 30.52%.At genus level,the percentage of pantropic type was 21.39% and the temperate type 13.87%,the temperate elements(38.73%)were more than tropic ones(34.10%).The floristic geographical components are multiform,transition is obviously and the areal-type is various.And which include the tropic,subtropic and temperate characteristics,but the subtropic is more evident.