摘要
为了揭示鄱阳湖湿地植被对关键水文要素的响应规律,综合运用EFDC水动力学模型和高斯模型,建立了湿地植被分布面积对淹没水深、淹没时长和退水时间的响应关系,明确湿地植被对关键水文要素的生态需求。结果表明:鄱阳湖湿地典型植被对这3种关键水文要素的生态阈值点由小到大依次均表现为:芦苇<苔草<虉草<蓼子草,从而形成了芦苇、苔草、虉草和蓼子草由高到低的空间分布格局;苔草的生态幅宽最大,表明其对生境的适宜范围最广、适应能力最强,从而使得其在鄱阳湖的分布范围最广。
In order to reveal the response law of wetland vegetation communities of Poyang Lake to hydrological elements,the response curves had been established by using EFDC hydrodynamic model and Gaussian model,and the ecological thresholds of the four typical wetland vegetation communities of Poyang Lake to submerged depth, submerg duration and the beginning time of water recession were quantified, respectively. The results show that the ecological thresholds of the three key hydrological elements of vegetation communities are as follows:Phragmites australis Community < Carex spp. Community < Phalaris arundinacea Community < Polygonum criopolitanum Community, thus resulting in a spatial distribution pattern of this four vegetation communities from high to low. In addition, The range of ecological amplitude of Carex spp. Community is the largest,indicating that it had the widest range of suitable habitat and the strongest adaptability,thus making it have the most widely distributed range in Poyang Lake.
作者
王若男
刘晓波
韩祯
黄爱平
彭文启
王世岩
WANG Ruonan;LIU Xiaobo;HAN Zhen;HUANG Aiping;PENG Wenqi;WANG Shiyan(Department of Water Eco-Environment,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)
出处
《中国水利水电科学研究院学报》
北大核心
2021年第5期482-489,共8页
Journal of China Institute of Water Resources and Hydropower Research
基金
中国水利水电科学研究院基本科研业务费(WE0145B592017,WE0145B532017,WE0145B342016,WE0145B562016)。
关键词
鄱阳湖
湿地植被
水文要素
生态阈值
Poyang Lake
wetland vegetation
hydrologic element
ecological threshold
