中国鸭绿江口滨海湿地植物区系组成、性质和特征

Floristic Composition,Characteristics and Features of Vascular Plants in Yalu River Estuarine Wetlands

为了揭示中国河口滨海候鸟栖息地植物区系特征,采用线路和样地调查法,对鸭绿江口滨海湿地维管植物区系进行了研究。结果表明:研究区植物种类丰富,共有维管植物83科234属365种,科、属组成的优势现象明显;区系具有一定的古老性,但特有程度低;单种属和少种属数量较多,具有一定生态脆弱性;区系地理成分复杂,分布区类型多样;温带成分优势明显,热带成分比较丰富,显示出植物交汇的特点;中国滨海湿地植物区系相似性呈现由北向南依次降低的格局。建议应加强植被管理和保护,为候鸟迁徙和地区生态安全创造良好的环境。

A survey of vascular plants in Yalu River estuarine wetlands in north China was conducted to investigate the floristic characteristics of vascular plants in coastal wetland habitat for migratory birds by establishment of sample plots.A total of 365 species of vascular plants belonging to 234 genera and 83 families were recorded in Yalu River estuarine wetlands,and dominant family and genus could be observed in the floristic composition.The flora is ancient in origin,and endemic phenomenon is not obvious.Genera contain single species or few species are rich,indicating an ecological frangibility in certain degree.Geographical elements are complex and vascular plants species are various.The dominance of temperate elements is evident and tropical elements are plentiful,indicating the characteristics of plant crossing and floristic similarity reducing from north to south.Vegetations should be further protected in order to make a good habitat environment for migratory birds and realize regional ecological security.