Spatially Different Nutrient Histories Recorded by Multiple Cores and Implications for Management in Taihu Lake, Eastern China

编号 zgly0001581068

文献类型 期刊论文

文献题名 Spatially Different Nutrient Histories Recorded by Multiple Cores and Implications for Management in Taihu Lake, Eastern China

作者 CAOYanmin  ZHANGEnlou  PeterLANGDON  LIUEnfeng  SHENJi 

作者单位 StateKeyLaboratoryofLakeScienceandEnvironment  NanjingInstituteofGeography&Limnology  ChineseAcademyofSciences  UniversityofChineseAcademyofSciences  SchoolofGeography  UniversityofSouthampton 

母体文献 Chinese Geographical Science 

年卷期 2013年05期

年份 2013 

分类号 X143 

关键词 nutrienthistory  chironomid  multiplecores  transferfunction  TaihuLake 

文摘内容 The Taihu Lake,a large shallow lake in the floodplain of the Changjiang(Yangtze) River in the eastern China,is faced with challenging ecological problems resulting from eutrophication,which has affected the regional freshwater supply of a large population.Although efforts have been made to assess the nutrient evolution histories in the northern bays,little is known regarding nutrient histories in different parts across the entire lake basin.In this paper,we present nutrient histories for different parts of the lake based on chironomid transfer functions applied to four short cores obtained from the northern,western and eastern regions of the lake.The chironomid-inferred total phosphorus(CI-TP) concentrations were compared with the phosphorus concentrations obtained by using instrumental and sedimentary data.The results suggest that trophic evolution histories were asynchronous throughout the lake during the past decades in response to different ecological regimes controlled by the nutrient input,wind direction and shoreline topography.The restoration of aquatic plants may be an effective option for the management of lake rehabilitation to ′natural′ conditions.Given the multiple factors controlling the biotic communities in such a large and complex lake,combined analyses among the multi-proxies encountered in the sediments are necessary for comprehensive insight into paleolimnological studies.The spatial heterogeneity in the ecological trajectories within this complicated ecosystem suggests that different management practices should be undertaken for specific lake zones in the Taihu Lake.