长白山北坡河岸带群落植物区系分析

对吉林省二道白河河岸带植物区系的研究结果表明，河岸带植被中共有维管束植物68科169属288种，其中包括蕨类植物11科16属26种，种子植物57科153属262种．种子植物中，裸子植物3科6属9种，被子植物54科147属253种；被子植物中，双子叶植物45科118属212种，单子叶植物9科29属41种．由此可见二道白河河岸带的植物种类较为丰富．对其中被子植物分布区类型的分析表明，二道白河流域河岸带种子植物区系科、属的分布类型较为丰富，在科级水平上有6个分布类型2个变型，在属级水平上有9个分布类型7个变型．河岸带植物区系呈温带特性，各类温带分布类型117属，占河岸带种子植物153属的76．5％．二道白河流域河岸带植物区系地理联系广泛，与热带植物区系和东亚区系具有一定的联系，但与地中海植物区系的联系甚少．表明河岸带在生物多样性保护中的重要作用．

Flora analysis of riparian plant communities on the northern slope of Changbai Mountain

This study was conducted in the riparian forest of Erdaobaihe River, and the flora of riparian plant communities on the northern slope oi Changbai Mountain was researched and analyzed. There were 288 vascular plant species belonging to 169 genera and 68 families, among them, 26 plant species belonging to 16 genera and 11 families were fern, and 262 plant species belonging to 153 genera and 57 families were spermatophyte. Among spermato-phyte, there were 9 gyrnnosperm species belonging to 6 genera and 3 families and 253 angiosperrn species belonging to 147 genera and 54 families. Among angiosperrn, there were 212 dicotyledonous species belonging to 118 genera and 45 families and 41 monocotyledonous species belonging to 29 genera and 9 families. All the results showed that there were abundant plant species in the riparian plant communities on the northern slope of Changbai Mountain. Analyses on the distribution area types of spermatophyte in the riparian communities showed that the distribution area types of genera and families were both abundant. For genus level, there were 9 distribution area types and 7 sub-types, and for family level, there were 6 distribution area types and 2 sub-types. The riparian plant communities had a temperate characteristic, and there were 117 genera, which were accounted for 76.5% of all the genera of spermatophyte, belonging to all the different temperate distribution types. In addition, the flora of riparian communities had a complex component, and had close relations with Tropical and East Asia distribution type, but few relations with Mediterranean distribution type. The results also showed that riparian zone could play an important role in biodiversity protection.