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The effect of Anodonta woodiana on the competitive relationship between benthic and planktonic algae in shallow aquatic ecosystem
YU Xiao, ZHANG Xiu-feng, LIU Zheng-wen
Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
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Abstract  

The competitive relationship between benthic and planktonic algae plays an important role in the structure and function of shallow aquatic ecosystem.Bivalves can affect the planktonic algae biomass and community structure through filter-feeding,thus influencing the results of the competition between benthic and planktonic algae.In order to investigate the effect of filter-feeding bivalves on the competitive relationship between benthic and planktonic algae,we conducted an experiment with two treatments,one with Anodonta woodiana as bivalve treatments and one without A.woodiana as controls.The results showed that A.woodiana significantly reduced the biomass of planktonic algae and increased the biomass of benthic algae.The dominant species of planktonic algae changed from cyanobacteria to diatom in the bivalve treatments.Moreover,the transparency and light intensity over sediment surface in the bivalve treatments were higher than those of controls.Our study demonstrates that bivalves can change the competitive relationship between benthic and planktonic algae and thus may enhance the shift of shallow lakes from a turbid to a clear water state.This research has some implications for restoration and management of eutrophic shallow lakes.

Key wordsAnodonta woodiana      benthic algae      planktonic algae      competition     
Received: 25 June 2012     
:  Q89  
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YU Xiao
ZHANG Xiu-feng
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YU Xiao,ZHANG Xiu-feng,LIU Zheng-wen. The effect of Anodonta woodiana on the competitive relationship between benthic and planktonic algae in shallow aquatic ecosystem[J]. , 2012, 31(3): 301-305.
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