Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures

Haiping Zhang; Ruihong Chen; Feipeng Li; Ling Chen

doi:10.1007/s00343-015-4063-4

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Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures

OriginalPaper | Updated：2023-05-16

- Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures
- Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures
- 海洋湖沼学报（英文） 2015年33卷第2期页码：430-438
- Affiliations：
  
  College of Environmental Science and Engineering Tongji University
- Author bio：
- Funds：
  
  Supported by the National Natural Science Foundation of China (Nos. 51379146, 51409190) and the National Science Foundation for Post-Doctoral Scientists of China (No. 2013M531218)
- DOI：10.1007/s00343-015-4063-4
  中图分类号：
- 网络首发：2014-12-10，
  
  纸质出版：2015
- Accepted：
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Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures[J]. 海洋湖沼学报（英文）, 2015,33(2):430-438.

Zhang, H., Chen, R., Li, F. et al. Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures., Chin. J. Ocean. Limnol. 33, 430–438 (2015). https://doi.org/10.1007/s00343-015-4063-4
Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures[J]. 海洋湖沼学报（英文）, 2015,33(2):430-438. DOI： 10.1007/s00343-015-4063-4.

Zhang, H., Chen, R., Li, F. et al. Effect of flow rate on environmental variables and phytoplankton dynamics: results from field enclosures., Chin. J. Ocean. Limnol. 33, 430–438 (2015). https://doi.org/10.1007/s00343-015-4063-4 DOI：

摘要

Abstract

To investigate the effects of flow rate on phytoplankton dynamics and related environment variables

a set of enclosure experiments with different flow rates were conducted in an artificial lake. We monitored nutrients

temperature

dissolved oxygen

conductivity

turbidity

chlorophyll-a and phytoplankton levels. The lower biomass in all flowing enclosures showed that flow rate significantly inhibited the growth of phytoplankton. A critical flow rate occurred near 0.06 m/s

which was the lowest relative inhibitory rate. Changes in flow conditions affected algal competition for light

resulting in a dramatic shift in phytoplankton composition

from blue-green algae in still waters to green algae in flowing conditions. These findings indicate that critical flow rate can be useful in developing methods to reduce algal bloom occurrence. However

flow rate significantly enhanced the inter-relationships among environmental variables

in particular by inducing higher water turbidity and vegetative reproduction of periphyton (Spirogyra). These changes were accompanied by a decrease in underwater light intensity

which consequently inhibited the photosynthetic intensity of phytoplankton. These results warn that a universal critical flow rate might not exist

because the effect of flow rate on phytoplankton is interlinked with many other environmental variables.

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Keywords

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