摘要
由于鄱阳湖独特的水文特征与潜育化的土壤环境,湿地植物根系生长过程及其对环境的适应机制近年来受到国内外研究人员的高度关注。2011年,以鄱阳湖典型洲滩3种植物群落为研究对象,采用野外调查和统计分析相结合的方法,研究了鄱阳湖典型洲滩植物群落结构变化和群落分布与土壤养分之间的关系。研究结果表明,从水体到泥滩至阶地,鄱阳湖典型洲滩植物呈现带状演替,沿泥滩到阶地的方向,植物群落分别为虉草(Phalaris arundinacea)群落带、灰化薹草(Carex cinerascens)群落带和篱蒿(Artemisia selengensis)群落带;3种植物群落的优势种高度与地表生物量有相同的变化趋势;月降水量越大,则篱蒿群落的Shannon-Wiener生物多样性指数越高;土壤有机碳、全氮和全磷含量能影响植物群落优势种的高度。加强鄱阳湖典型洲滩植物群落结构变化对湿地土壤环境的适应性过程与机制的研究,对于了解鄱阳湖洲滩湿地植物群落的生态演替及演化机制具有重要科学意义。
The growth process of the roots of the wetland vegetation, and their adaptation mechanisms to the site surroundings environment, had been aroused more and more attentions among the researchers because of the unique hydrological characteristics and the gleization of the soil environment in the wetlands in Poyang Lake area. Three kinds of plant communities in typical beaches in Poyang Lake area were selected as a case study to investigate the relationship between the vegetation community structure and soil nutrients. A comprehensive method based on the field investigation and multivariate statistical analysis was applied on the vegetation growth dynamics and mainly impact factors of soil in typical beaches in Poyang Lake area. The results demonstrated that plant communities showed a zonation distribution along the distance to the lake centre in typical beaches in Poyang Lake area. From the lake to the land, the vegetation was with the following sequence： Phalaris arundinacea, Carex cinerascens and Artemisia selengensis. The aboveground biomass of dominant species had the same tendency with the height in these three vegetation communities. In Artemisia selen？ gensis community, Shannon-Wiener index increased with the monthly precipitation. The contents of soil total organic carbon, total nitrogen and total phosphorus had an impact on the height of dominant species. It is very meaningful to strengthen the summaries of the adaptive process and mechanism of the soil environment in the wetlands on the vegetation structure, which is helpful in understanding the ecological succession and evolution mechanism of the vegetation communities in the wetlands in Poyang Lake area.
出处
《湿地科学》
CSCD
北大核心
2013年第2期186-191,共6页
Wetland Science
基金
国家重点基础研究发展规划项目(2012CB417005)
国家自然科学基金项目(41271034和41101465)
国家科技基础性工作专项项目(2012FY111800-03)资助
关键词
植物群落
洲滩
结构
土壤养分
鄱阳湖
vegetation community
beach
structure
soil nutrients
Poyang Lake
