Human impact recorded in the sediment of Honghu Lake, Hubei, China

作     者：YAO Shu-chun XUE Bin XIA Wei-lan 

作者机构：Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China Graduate School of CAS Beijing 100039 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2006年第18卷第2期

页      面：402-406页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 083001[工学-环境科学] 08[工学] 0815[工学-水利工程] 

基　　金：TheK nowledgeInnovationProgram oftheChineseA cadem yofSciences (N o.K ZCX1-SW -12-I) theN ationalN aturalScienceFoundationofChina(N o.40472085)andtheStateK eyBasicResearchandD evelopm entPlanofChina(N o.2002CB412301) 

主　　题：Honghu Lake lake deposit human impact 

摘      要：Vertical profiles of the total organic carbon （TOC）, total nitrogen （TN）, phosphorus, susceptibilities, elements and partical size were analyzed in a short ^137Cs-dated sediment core collected from Honghu Lake, China. The average sedimentation rate was 1.55 mm/a. The results indicated that trophic status of Honghu Lake in the historical period had experienced three stages. Before 1840 the lake was characterized with lower productivity, TOC was less than 9.92 g/kg; TN was 0.902 to 1.24 g/kg. During about 1840-1950, population increased quickly, there was an obvious change in TOC with an average of 13.0 g/kg. Since 1950, human impacts have accelerated the lake eutrophication and nutrients enriched in the sediment with TOC of 21.7 to 93.1 g/kg, TN of 1.77 to 8.78 g/kg. The heavy metal concentration profiles presented similar distribution trends except Pb .and Mn. The results from elements analyses indicated that Honghu Lake had not been polluted by heavy metals except lead.