长江流域资源与环境 >> 2010, Vol. 19 >> Issue (06): 597-.

• 鄱阳湖、洞庭湖湿地生态 •    下一篇

鄱阳湖湿地植物生态系统结构及湖水位对其影响研究

胡振鹏|葛 |刚|刘成林|陈伏生|李 |述   

  1. (南昌大学| 江西 南昌| 330029)
  • 出版日期:2010-06-20

STRUCTURE OF POYANG LAKE WETLAND PLANTS ECOSYSTEM AND INFLUENCE OF LAKE WATER LEVEL FOR THE STRUCTURE

HU Zhenpeng| Ge Gang| LIU Chenglin| CHEN Fusheng| LI Shu   

  1. (Nanchang University| Nanchang| Jiangxi 330029| China)
  • Online:2010-06-20

摘要:

通过对鄱阳湖水文过程和湖盆地形特点的分析,利用3S技术对鄱阳湖湿地进行了分类,研究了各种类型湿地植物生态系统的生境、主要植物群落结构和分布规律。结果表明,鄱阳湖湿地植物生态系统结构复杂,生物多样性极其丰富。湿地植物是以根茎为主要繁殖器官的克隆繁殖植物,以集群分布为主要特点。在宏观尺度上受地形高程、湖水位和洲滩出露时间制约,不同植物群落沿水分梯度分布;在景观尺度上受到土壤含水量、地下水埋深和土壤结构影响,形成水平镶嵌结构;微观尺度上还与微地形和土壤养分密切相关,部分区域表现为复合体结构。湿地植被对水分梯度的敏感性,导致湿地植物生态系统的易变性和脆弱性。近年来,鄱阳湖水位过低且持续时间长,使生态系统遭受一定损害。

Abstract:

With an analysis of the hydrologic processes and landform of Poyang Lake,wetland types were classified by using 3S technology,the habitats of wetland plants,structure of major plants community and its distribution rules were investigated in this paper.Poyang Lake has complex system of wetland plants and is extremely rich in biodiversity.The wetland plants are colonel reproduction of plants using roots or stems as the the main reproductive organs,so the distribution pattern of plant communities presents the main features of the cluster distribution.In microscale,the plant communities distribute based on the moisture gradient by the influence of lake′s landform,the elevation,the water lever and exposed time of the beaches.In landscapescale,the distribution of plant communities present community mosaic structure by the influence of soil moisture,groundwater depth and soil structure.In microcosmicscale,the distribution of plant communities presents community complex structure in some regions by the influence of the microtopography and soil nutrient.Wetland plant′s extreme sensitivity to moisture gradient leads the structure to become mutability and fragility.In recent years,the longlasting low water lever of Poyang Lake causes damage to ecosystem.

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