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引用本文:曹艳敏,张恩楼,沈吉,刘恩峰,陈旭.太湖梅梁湾摇蚊亚化石沉积记录及营养演化研究.湖泊科学,2011,23(4):549-554. DOI:10.18307/2011.0409
CAO Yanmin,ZHANG Enlou,SHEN Ji,LIU Enfeng,CHEN Xu.Subfossil chironomid assemblages in sediments of Meiliang Bay,Lake Taihu and the trophic reconstruction. J. Lake Sci.2011,23(4):549-554. DOI:10.18307/2011.0409
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太湖梅梁湾摇蚊亚化石沉积记录及营养演化研究
曹艳敏1,2, 张恩楼1, 沈吉1, 刘恩峰1, 陈旭1,2
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院研究生院, 北京 100049
摘要:
对太湖梅梁湾T0905岩芯摇蚊幼虫亚化石组合进行了分析, 探讨了自1940年以来梅梁湾湖区摇蚊幼虫对营养盐演化的响应.结果表明, 梅梁湾湖区摇蚊组合变化以1970年为分界点, 经历了由Tanytarsus为优势属种向富营养属种Chironomus plumosus-typeMicrochironomus为优势组合转变的过程.1970年以前, 沉积物中摇蚊以Tanytarsus为主, 梅梁湾湖区水质相对较好, 为中营养水平;1970年以来, Tanytarsus的相对丰度伴随Chironomus plumosus-type的增加而迅速降低, 耐营养种Propsilocerus akamusi-type也开始出现, 尤其是1990s以来, 富营养种Microchironomus tabarui-type的百分含量也迅速增加, 梅梁湾湖区营养水平迅速升高, 水体由中富营养水平转变为富营养水平。
关键词:  太湖  梅梁湾  摇蚊  沉积记录  富营养化
DOI:10.18307/2011.0409
分类号:
基金项目:国家重点基础研究发展规划项目(2008CB418103)资助
Subfossil chironomid assemblages in sediments of Meiliang Bay,Lake Taihu and the trophic reconstruction
CAO Yanmin1,2, ZHANG Enlou1, SHEN Ji1, LIU Enfeng1, CHEN Xu1,2
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.Graduate School of Chinese Academy of Sciences, Beijing 100049, P.R.China
Abstract:
Based on chironomid analysis for sediment core T0905 from Meiliang Bay,Lake Taihu,response patterns of chironomid assemblages to lake trophic changes were discussed.Results show that chironomid assemblages experienced a notable community shift from predominant Tanytarsus to Chironomus plumosus-type and Microchironomus dominated at around 1970.Before 1970,chi-ronomid assemblages were dominated by Tanytarsus,which is an indicator of relatively good water quality and moderate trophic sta-tus.Subsequently,the relative abundance of Tanytarsus decreased along with the increase of eutrophic indicators such as Chironomus plumosus-type and Propsilocerus akamusi-type.Especially from 1990,the abundance of Microchironomus tabarui-type had a sharp increase,denoting that Meiliang Bay has already become eutrophic level from meso-eutrophication.
Key words:  Lake Taihu  Meiliang Bay  chironomids  sediment record  eutrophication
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