A primary study on relationships between subfossil chironomids and the distribution of aquatic macrophytes in three lowland floodplain lakes, China

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• 作者：Yanmin Cao (1)
  Enlou Zhang (2)
  Guojun Cheng (1)
  
• 关键词：Chironomids ; Macrophyte biomass ; Corynoneura ; Shallow lakes ; Yangtze floodplain
• 刊名：Aquatic Ecology
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：48
• 期：4
• 页码：481-492
• 全文大小：983 KB
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• 作者单位：Yanmin Cao (1)
  Enlou Zhang (2)
  Guojun Cheng (1)
  
  1. College of Life Sciences, South-Central University for Nationalities, Wuhan, 430074, China
  2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
  
• ISSN：1573-5125

文摘

Aquatic macrophytes act as an important substrate for zoobenthos-supporting midge communities (chironomids) that can be used for reconstructing past environmental change. This study selected three macrophyte-dominated lakes in the middle reach of the Yangtze floodplain (central China), to identify relationships between macrophyte characteristics (i.e. communities, richness and biomass) and subfossil chironomid assemblages. One-way ANOSIM tests illustrated that there were significant differences in chironomid community compositions between lakes. Most chironomid taxa were not selective of dominant macrophyte species, but Corynoneura species were found to be associated with the development of Vallisneria as revealed by SIMPER analysis. Multivariate analyses indicate that submerged plant biomass, water depth and secchi depth, conductivity and the concentration of HCO3 ?/sup> were significantly correlated with midge compositions. Overall, this study corroborates the existing opinions that chironomid species show little selectivity to plant type but are significantly influenced by plant density. As an exception to this general trend, we found strong associations between Corynoneura chironomid larvae and Vallisneria macrophytes, prompting the need for future experimental studies to confirm this association.