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1、生态学杂志ChineseJournalofEcology2007,26(12):2062-2068*太湖水体叶绿素a含量与氮磷浓度的关系1,2222**陈永根刘伟龙韩红娟胡维平(1浙江林学院环境科技学院,浙江临安311300;2中国科学院南京地理与湖泊研究所,南京210008)摘要基于太湖水体1993)2002年5)9月监测资料,进行了叶绿素a含量与总氮(TN)、总磷(TP)浓度关系的分区统计分析,探讨了太湖藻类生长的TN、TP适宜浓度。结果表明:太湖叶绿素a含量与TN、TP浓度的关系存在显著的空间差异;在梅梁湾和西北区,当TN、TP浓度较低时,叶绿素a含量与TN、TP浓度呈正相关;当TN
2、、TP浓度较高时(梅梁-1-1湾TN、TP浓度分别超过514和0131mg#L;西北区分别超过415和0127mg#L),叶绿素a含量与TN、TP浓度呈负相关;在湖心区和贡湖区,叶绿素a含量与TN、TP浓度呈正-1相关,尤其当TP浓度超过011mg#L时,叶绿素a含量随TP浓度增加而上升;在东太湖和湖东滨岸区,随TN、TP浓度的升高,叶绿素a含量变化较小;在西南区,叶绿素a含量与TN浓度无显著相关关系,与TP浓度呈正相关;太湖藻类生长的适宜浓度是TN<514mg#-1-1L,TP为011~0131mg#L。关键词太湖;叶绿素a;总氮;总磷;藻类生长;适宜浓度中图分类号X52文献标识码A文章
3、编号1000-4890(2007)12-2062-07Relationshipsbetweenchlorophyl-lacontentandTNandTPconcentrationsinwater1,222bodiesofTaihuLake,China.CHENYong-gen,LIUWe-ilong,HANHong-juan,HU21We-iping(SchoolofEnvironmentalScienceandTechnology,ZhejiangForestryUniversity,Lin.2an311300,Zhejiang,China;NanjingInstituteofGeog
4、raphyandLimnology,ChineseAcademyofSciences,Nanjing210008,China).ChineseJournalofEcology,2007,26(12):2062-2068.Abstract:BasedonthemonitoringdatafromMaytoSeptemberin1993-2002,thispaperstud-iedtherelationshipsbetweenthechlorophyll(Ch-la)contentinalgaeandlowerthetotalnitrogen(TN)andtotalphosphorus(TP)
5、concentrationsinwaterbodiesofTaihuLake,withthefavora-bleTNandTPconcentrationsforalgaegrowthdiscussed.Theresultsshowedthattherelation-shipsbetweenCh-lacontentandTNandTPconcentrationswerequitedifferentinthemonitoringzones.TheCh-lacontentincreasedwithincreasingTNandTPconcentrationswhentheywere-1-1low
6、erthan514and0131mg#LinMeiliangBayandlowerthan415and0127mg#LinthenorthwestpartoftheLake,butdecreasedwithincreasingTNandTPconcentrationswhenthey-1werehigherthan514and0131mg#LinMeiliangBayandhigherthan415and0127mg#-1LinthenorthwestpartoftheLake,respectively.InGonghuBayandinthecentralpartoftheLake,Ch-
7、lacontenthadpositivecorrelationswithTNandTPconcentrations,andincreasedvery-1fastwhentheTPconcentrationwashigherthan011mg#L.InDongtaihuBayandintheeastpartoftheLake,Ch-lacontentvariedlittlewiththechangesofTNandTPco
