丹江口库区湿地水生维管束植物的区系研究

丹江口水库是国家南水北调中线工程的水源地，位于鄂豫两省交界处。其库区湿地是我国现今保存最为完整的湿地之一，已被列入《中国重要湿地名录》。库区湿地水生维管束植物物种丰富，共计有30科56属90种。该区系的地理成分比较复杂，以世界分布、泛热带分布和北温带分布类型为主，表现出明显的亚热带特征。在与国内其它9处湿地进行水生维管束植物区系比较后表明：各湿地与丹江口库区湿地相似系数的大小与其所处的地理位置和气候条件关系密切。

Flora Studies on Aquatic Vascular Plants in Wetland of Danjiangkou Reservoir Region

Danjiangkou Reservoir Region, located in the juncture of Hubei Province and Henan Province, is the water source of the middle-route of South-to-North Water Transfers Project in China. Abundant aquatic vascular plant species, including 90 species belonging to 56 genera and 30 families, were found in the area. Among the 9 areal-types of its genera distinguished, cosmopolitan,pantropic and north temperate distribution patterns were the main floristic elements, which implied the subtropic characteristics of the wetland. The comparison of flora between Danjiangkou Reservoir Region and other 9 wetlands showed that the geographic position and climate history affect the flora similarities.