Environmental Science and Pollution Research

, Volume 24, Issue 5, pp 5012–5018 | Cite as

Does turbidity induced by Carassius carassius limit phytoplankton growth? A mesocosm study

  • Hu He
  • En Hu
  • Jinlei Yu
  • Xuguang Luo
  • Kuanyi Li
  • Erik Jeppesen
  • Zhengwen Liu
Research Article


It is well established that benthivorous fish in shallow lakes can create turbid conditions that influence phytoplankton growth both positively, as a result of elevated nutrient concentration in the water column, and negatively, due to increased attenuation of light. The net effect depends upon the degree of turbidity induced by the benthivores. Stocked Carassius carassius dominate the benthivorous fish fauna in many nutrient-rich Chinese subtropical and tropical shallow lakes, but the role of the species as a potential limiting factor in phytoplankton growth is ambiguous. Clarification of this relationship will help determine the management strategy and cost of restoring eutrophic lakes in China and elsewhere. Our outdoor mesocosm experiment simulating the effect of high density of crucian carp on phytoplankton growth and community structure in eutrophic shallow lakes suggests that stocking with this species causes resuspension of sediment, thereby increasing light attenuation and elevating nutrient concentrations. However, the effect of light attenuation was insufficient to offset the impact of nutrient enhancement on phytoplankton growth, and significant increases in both phytoplankton biomass and chlorophyll a concentrations were recorded. Crucian carp stocking favored the dominance of diatoms and led to lower percentages (but not biomass) of buoyant cyanobacteria. The dominance of diatoms may be attributed to a competitive advantage of algal cells with high sedimentation velocity in an environment subjected to frequent crucian carp-induced resuspension and entrainment of benthic algae caused by the fish foraging activities. Our study demonstrates that turbidity induced by stocked crucian carp does not limit phytoplankton growth in eutrophic waters. Thus, removal of this species (and presumably other similar taxa) from subtropical or tropical shallow lakes, or suspension of aquaculture, is unlikely to boost phytoplankton growth, despite the resulting improvements in light availability.


Crucian carp Nutrients Resuspension Suspended solids Phytoplankton community Shallow lakes China 



The authors wish to express their gratitude to Xiaolong Zhu, Xiaoxia Chen, and Ruijie Shen for the support in the field and in the laboratory. This study was supported by the National Science Foundation of China (31500379 and 41571086); by the MARS (Managing Aquatic ecosystems and water Resources under multiple Stress) project funded under the Seventh EU Framework Programme, Theme 6 (Environment Including Climate Change), Contract No. 603378 (; and by the CLEAR (a Villum Kann Rasmussen Centre of Excellence project).

Supplementary material

11356_2016_8247_MOESM1_ESM.xlsx (21 kb)
ESM 1 (XLSX 21 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Hu He
    • 1
  • En Hu
    • 1
  • Jinlei Yu
    • 1
  • Xuguang Luo
    • 2
  • Kuanyi Li
    • 1
  • Erik Jeppesen
    • 1
    • 3
    • 4
  • Zhengwen Liu
    • 1
    • 4
    • 5
  1. 1.State Key Laboratory of Lake Science and EnvironmentNanjing Institute of Geography and Limnology, Chinese Academy of SciencesNanjingChina
  2. 2.College of Animal ScienceInner Mongolia Agricultural UniversityHohhotChina
  3. 3.Department of BioscienceAarhus UniversityAarhusDenmark
  4. 4.Sino-Danish Centre for Education and ResearchBeijingChina
  5. 5.Department of Ecology and Institute of HydrobiologyJinan UniversityGuangzhouChina

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