Vegetation Dynamic Changes of Lake Nansi Wetland in Shandong of China

The paper researched the Lake Nansi wetlands phytoplankton species of aquatic vascular plants, distribution and biomass from 1983 to 2006. The methods were field investigation, laboratory analysis, remote sensing and geographic information system technology. The results showed that, wetland vegetation biomass continued to decrease in Lake Nansi from 1983 to 2006. Biomass of emergent plants decreased the fastest, followed by floatingleaved plants and submerged plants. The result reflects the human reclamation, aquaculture and other activities caused reduction in primary productivity. This effect decreased gradually from the periphery to the center of the Lake.