Controlling phytoplankton blooms in a canyon-shaped drinking water reservoir via artificial and induced natural mixing: Taxonomic versus functional groups

Wen, Cheng-Cheng; Wen, Gang; Li, Kai; Yang, Shang-Ye; Zhang, Haihan; Xu, Jianling; Wang, Zhi

doi:10.1016/j.chemosphere.2021.131771

Cited by 13 publications

(6 citation statements)

References 38 publications

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“…was suitable for growth in the mixed layer of et al, 2002), particularly those with a high surface-to-volume ratio and weak light adaptation, such as functional group D. Furthermore, non-motile Bacillariophyta and Chlorophyta can remain in the euphotic layer for longer periods and receive light for photosynthesis, thanks to the carrying effect produced by vertical mixing (Li et al, 2019). The study confirmed this finding and was consistent with other studies (Wen et al, 2022). The results also demonstrate a decrease in Z eu /Z mix (light availability) in 2020, while there was an occasional increase in phytoplankton abundance, suggesting that light limitation was not a critical factor influencing the changes in phytoplankton, especially for non-motile algae.…”

Section: Key Drivers Affecting Phytoplankton Functional Groups During...supporting

confidence: 92%

“…Besides, the ecological condition of the water column during the mixing period was better than that of the stratification period. Similar observations have been reported for other studies (Dembowska et al, 2015;Wen et al, 2022). Therefore, it is crucial to extend the mixing period to enhance the ecological status of the reservoir.…”

Section: Evaluation Of Ecological Statesupporting

confidence: 90%

“…In this study, the euphotic depth (Z eu ) was determined as 2.7 times the transparency (Wen et al, 2022). The depth of the surface mixed layer (Z mix ), defined by the gradient of the surface temperature of 0.2°C/m, was calculated according to Liu et al (2012).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies The effects of water mixing on phytoplankton mainly manifest in two ways: (i) the dynamic mixing process causes disturbance and flushing of the water column, which impacts the structure of the phytoplankton community; and (ii) mixing directly affects the availability of light and nutrients to phytoplankton (Becker et al, 2010(Becker et al, , 2009Zhong et al, 2022). In contrast to the sites of most studies (Liu et al, 2012;Wen et al, 2022), Xikeng Reservoir is relatively shallow (22 m) and experiences the highest temperature from July to September, when heat transferred from the water surface to the middle water column led to an increase in Z mix . Additionally, Z mix slightly increased in March and April, likely due to an increase in water diversion.…”

Section: Key Drivers Affecting Phytoplankton Functional Groups During...mentioning

confidence: 99%

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Effect of water stratification and mixing on phytoplankton functional groups: a case study of Xikeng Reservoir, China

Yunhao Bai,

Tinglin Huang,

Pengcheng Yang

2023

WSA

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A shift in reservoir stratification and mixing significantly affects the water column ecosystem, which in turn leads to changes in phytoplankton abundance and community structure. To explore the effects of stratification and mixing on the phytoplankton community structure of a diversion reservoir, a 1-year survey was divided into a stratification period in 2020, a mixing period in 2020, and a stratification period in 2021, and redundancy analysis (RDA), variance partitioning analysis (VPA) and Pearson correlation analysis were used to analyse the key drivers affecting the phytoplankton functional groups, using Xikeng Reservoir as a case study. During the study period, 8 phyla, 69 genera and 9 major functional groups were observed in this reservoir. The dominant functional groups varied significantly, being X1 in the stratified period in 2020; P and D in the mixing period in 2020; and D, X1, and M in the stratified period in 2021. The phytoplankton diversity index was greater in the mixing period than in the stratification period, in agreement with the results of the aquatic ecological status evaluation (Q index, higher in the mixing period than in the stratification period). However, phytoplankton diversity of Xikeng Reservoir was of limited value in assessing the degree of water pollution, so should be considered in combination with the Q index. Water temperature (WT), mixing depth (Zmix), nitrogen–phosphorus ratio (N/P), and total nitrogen (TN) were important drivers of phytoplankton functional group dynamics in different periods. The study provides a valuable reference for assessing the relationship between environmental factors and phytoplankton communities, as well as for the evaluation and conservation of aquatic ecosystems in southern China's water diversion reservoirs.

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Section: Key Drivers Affecting Phytoplankton Functional Groups During...supporting

confidence: 92%

Section: Evaluation Of Ecological Statesupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Key Drivers Affecting Phytoplankton Functional Groups During...mentioning

confidence: 99%

See 2 more Smart Citations

Effect of water stratification and mixing on phytoplankton functional groups: a case study of Xikeng Reservoir, China

Yunhao Bai,

Tinglin Huang,

Pengcheng Yang

2023

WSA

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“…The vertical distribution of phytoplankton is fundamental to the dynamics and structure of aquatic communities (Ryabov et al, 2010). Increased mixing has been identified as a key strategy to mitigate algal blooms (Visser et al, 2016;Wen et al, 2022), and increasing mixing promotes uniformity in the vertical distribution of phytoplankton communities across different layers in terms of density, biomass, and compositional structure. This uniformity in the vertical distribution of phytoplankton has emerged as a reliable indicator of the effectiveness of water quality regulation under hydrodynamic conditions.…”

Section: Introductionmentioning

confidence: 99%

Distinct differences of vertical phytoplankton community structure in mainstream and a tributary bay of the Three Gorges Reservoir, China

Wang,

Tan,

Cai

2024

Front. Plant Sci.

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The vertical distribution of phytoplankton plays a crucial role in shaping the dynamics and structure of aquatic communities. In highly dynamic reservoir systems, water level fluctuations significantly affect the physiochemical conditions and the phytoplankton community. However, the specific effects on the vertical characteristics of phytoplankton between the mainstream and the tributary bay of the reservoir remain unstudied. This study investigated the vertical aspects of phytoplankton density, biomass, α and β diversity through monthly sampling over two years in the mainstream (Chang Jiang, CJ) and a tributary bay (Xiang Xi, XX) of the Three Gorges Reservoir in China. Phytoplankton density and biomass were significantly higher in XX, indicating an increased risk of algal blooms in the tributary. The phytoplankton community in CJ showed more stable species-environment relationships, a lower Shannon index and a higher evenness index, suggesting a relatively simple structure and a more uniform distribution of phytoplankton among different water layers. Conversely, XX showed greater differences between water layers (higher β diversity), with significant negative correlations with water level and positive correlations with DO difference, dissolved silica (DSi) difference, and stratification. Peak phytoplankton density and biomass, as well as high β diversity in XX, occurred during periods of decreased water levels with strong stratification in spring and summer. A structural equation model complemented by path analysis revealed that a decrease in water level could increase β diversity either directly through internal processes with extended residence time or indirectly by modifying stratification and the vertical distribution of DSi in XX. Therefore, a proposed water quality management strategy for XX was to increase the water level or reduce β diversity by implementing artificial mixing during stratification periods. Overall, this study lies in its comprehensive investigation of the vertical characteristics of the phytoplankton community in both the mainstream and the tributary bay of the Three Gorges Reservoir, elucidating the significant impact of water level fluctuations and providing insights for targeted water quality management strategies in the tributary bay to mitigate potential ecological impacts.

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Spatio-temporal dynamics of phytoplankton in a diversion reservoir and the major influencing factors: taxonomic versus functional groups classification

Bai,

Huang,

Miao

2023

Environ Sci Pollut Res

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Controlling phytoplankton blooms in a canyon-shaped drinking water reservoir via artificial and induced natural mixing: Taxonomic versus functional groups

Cited by 13 publications

References 38 publications

Effect of water stratification and mixing on phytoplankton functional groups: a case study of Xikeng Reservoir, China

Effect of water stratification and mixing on phytoplankton functional groups: a case study of Xikeng Reservoir, China

Distinct differences of vertical phytoplankton community structure in mainstream and a tributary bay of the Three Gorges Reservoir, China

Spatio-temporal dynamics of phytoplankton in a diversion reservoir and the major influencing factors: taxonomic versus functional groups classification

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