Abstract：Lakeside wetland is an important transition zone between the aquatic ecosystem and the adjacent terrestrial ecosystem. In recent years, extensive lakeside wetland restoration projects of Lake Taihu have been carried out. However, the long-term function and sustainability of lakeside wetland restorations remain largely unexplored. Taking the natural lakeside wetland in Dongtaihu Bay, the restored lakeside wetland in the Eastern Shoreline and Zhushan Bay as a case, this paper calculated sedimentation rates with high-resolution radionuclide timing (210Pb-date to age-depth profile translation), and combined with grain-size and vertical distribution characteristics of TOC, TN, TP to analyze accumulations of TOC, TN, TP in the natural lakeside wetland sediments. The results showed that the sediments were mainly compromised of silt in either natural lakeside wetland or restored one. The average sedimentation rates of natural lakeside wetland in Dongtaihu Bay were: 0.74cm/a of Phragmites communis, 0.69cm/a of Zizania caduciflora, 1.24cm/a of Typha orientalis, 1.27cm/a of Hemarthria altissima, 0.81cm/a of Nelumbo nucifera. In recent 40years, the accumulations of TOC, TN, TP (per cm2) in natural lakeside wetland sediments of Dongtaihu Bay were: TOC 1408.0mg, TN 138.2mg, TP 14.31mg. For the restored lakeside wetland, with development of vegetation, the accumulations of nutrients in the restored lakeside wetland would be increasing. There is a large potential in sediment pool. As the external pollution under control, the lakeside wetland has a long-term function of purifying water.
王莹, 胡维平. 太湖湖滨湿地沉积物营养元素分布特征及其环境意义[J]. 中国环境科学, 2015, 35(1): 204-210.
WANG Ying, HU Wei-Ping. Nutrients distribution characteristics and their environmental significance of Taihu lakeside wetland sediments. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(1): 204-210.
