Abstract:

Forested wetlands are rare in China because most of them have been destroyed by the long history of human activities.Consequently,reconstruction and restoration of forested wetlands lack reference sites for community composition. In order to find out the wetland plants that can grow in high tidal plats of Chongxi wetlands,we selected and cultivated 21 wetland tree species among Phragmites australis and Zizania latifolia in Chongxi Wetland,forming wetland woody patches.We tracked the survival and growth of plant species from 2006 to 2008.The survival rate were 8685%,8000%,2000%,5000%,4000%,6200%,2000%,1000%,800% for native species Alnus trabeculosa,Adina rubella,Lycium [JP2]chinense,Camptotheca acuminate,Bischofia polycarpa,Sapium sebiferum,Pterocarya stenoptera,Euonymus [JP]maackii,and Morus alba,respectively,while Broussonetia papyrifera,Ziziphus jujuba,Celtis sinensis,Zelkova serrata,and Melia azedaeach,were all dead.And the survival rate were 9890%,9610%,8400%,6200%,5000%,1550%for the exotic species Taxodiumd istichum,Quercus palustris, Casuarinae quisetifolia,Salix integra,Hibiscus hamabo and Fraxinus griffithii,respectively,while Acer ne[JP2]gundo was dead.The analysis results showed that Taxodium distichum,Quercus palustris,Alnus trabeculosa and Casuarinn equiestifolia ware excellent species in restoration and reconstruction of periodic flooding wetland,and Adina rubella,Salix integra and Hibiscus hamabo were  good species also without lethality shading.Diversities of [JP]bird and macrobenthos species were improved significantly in the area with forested wetlands construction. Compared the project site with the control site,there were 19 more new bird species and 6 more new macrobenthos species than in project site that in the control site,the improvment of the biodiversity would surely enhance the ecosystem functions of this region. With integrated analysis with survival ratio and growth pattern indices,five suitable species were selected,they ware Alnus trabeculosa,Adina rubella,Taxodium distichum,Quercus palustris and Casuarinae quisetifolia for the vegetation restoration and reconstruction of the forested wetland in Chongxi wetland