湖南浏阳河国家湿地公园维管束植物地理成分分析

Geographical Composition of Vascular Plants in Liuyang River National Wetland Park,Hunan

目的:了解浏阳河国家湿地公园的维管束植物组成,为该地植物多样性保护提供理论依据。方法:在现有植被资料的基础上,采用样线调查与样点调查相结合,对浏阳河国家湿地公园范围内的维管束植物进行调查与分析。结果:(1)湿地公园范围内维管束植物共123科348属535种,其中蕨类植物9科11属12种,种子植物114科337属523种,植物组成上以大型科、单种属占优势;(2)湿地公园维管束植物兼备亚热带和温带成分,属的分布区类型(15种)相对科的分布型(12种)更广泛,植物科的地理成分以热带成分为主,植物属的地理成分呈现热带与温带对半交汇的特点,且存在中国特有属9属11种;(3)与省内河流型湿地进行对比,发现其单位面积内的野生植物物种数量并无优势,且与萱洲国家湿地公园的植物地理成分最为接近。结论:在浏阳河国家湿地公园的管护工作中,宜进一步加强对原生植被资源的保护,合理把控开发区域及力度,结合萱洲国家湿地公园现状,适当引种以促进湿地内部植物多样性,维持区域内部的生态系统稳定。

Objective:To understand the composition of vascular plants in Liuyang River National Wetland Park,and to provide a theoretical basis for the protection of plant diversity in this area.Methods:Based on the existing vegetation data,the vascular plants within the scope of Liuyang River National Wetland Park were investigated and analyzed by using the method of combining line survey and spot survey.Results:(1)There were 535 species of vascular plants in 348 genera and 123 families within the scope of the wetland park,including 12 species of ferns in 11 genera and 9 families,and 523 species of seed plants in 337 genera and 114 families.The composition of plants was dominated by large families and single species genera.(2)The vascular plants in the wetland park had both subtropical and temperate components.The distribution type of genera(15 species)was more extensive than that of families(12 species).The geographical composition of families was mainly tropical,and the geographical composition of genera showed the characteristics of the half intersection of tropical and temperate regions.There were 9 genera and 11 species endemic to China.(3)Comparing with the river wetlands in Hunan Province,it was found that the number of wild plant species per unit area was not advantageous,and the geographical composition of plants was most close to that of Xuanzhou National Wetland Park.Conclusion:In the future management of Liuyang River National Wetland Park,it was advisable to further strengthen the protection of native vegetation resources and reasonably control the development area and intensity.Combined with the current situation of Xuanzhou National Wetland Park,it was advisable to introduce appropriate species to promote the diversity of plants in the wetland.In this way,the stability of the ecosystem in the area could be maintained.