| 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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| 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-type和Microchironomus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 |
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| Subfossil chironomid assemblages in sediments of Meiliang Bay,Lake Taihu and the trophic reconstruction |
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CAO Yanmin1,2, ZHANG Enlou1, SHEN Ji1, LIU Enfeng1, CHEN Xu1,2
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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
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| 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 |
