%0 Journal Article
%T Quantitative Reconstruction for Lake Environmental Changes Using the Diatom-pH Transfer Function<br>利用硅藻-pH转换函数定量重建Llyn Hir湖pH的变化（英文）
%A CHENG Xiao-Ying
%A LI Shi-Jie
%A <br>成小英
%A 李世杰
%J 中国科学院研究生院学报
%D 2006
%I 
%X In terms of principle components analysis,detrended correspondence analysis and canonical correspondence analysis,a diatom-pH transfer function could be reconstructed by using the modern diatom data and pH from 34 lakes in Wales.In light of root mean square error and residuals results of the experiments,x-validated weighted averaging with classical deshrinking and x-validated weighted averaging partial least squares component 2 were selected for pH reconstruction with WA with classical deshrinking as comparison.According to these diatom-pH transfer functions,the fossil diatom in the sediment were analysed to reconstruct the pH value in Llyn Hir(lake) from 1956 to 1995.It showed that the improvement of pH in 1985 was the result of liming by the history record and there was an obvious effect in the following six years but the effect weakened gradually and vanished.Although liming can increase pH in a relatively short period,it can not eradicate lake acidification.
%K diatom assemblage
%K build the transfer function
%K reconstruct the past pH change
%K Llyn Hir<br>硅藻种群组合
%K 转换函数建立
%K 湖泊历史pH重建
%K Llyn
%K Hir湖
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=67CDFDECD959936E166E0F72DE972847&aid=12C07B2477176C96&yid=37904DC365DD7266&vid=EA389574707BDED3&iid=38B194292C032A66&sid=FA88DCCE84EA0A56&eid=8C27CCA578E52082&journal_id=1002-1175&journal_name=中国科学院研究生院学报&referenced_num=0&reference_num=12