Seasonal and interannual responses of blue-green algal taxa and chlorophyll to a monsoon climate, flow regimes, and N:P ratios in a temperate drinking-water reservoir

Jargal, Namsrai; An, Kwang-Guk

doi:10.1016/j.scitotenv.2023.165306

Cited by 16 publications

(6 citation statements)

References 48 publications

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“…Cyanophyceae (Dolichospermum spp., Pseudanabaena spp., and Leptolyngbya spp.) were dominant in late summer and early autumn (August to September) following the monsoon season, which is consistent with the typical dominance of Cyanophyceae in temperate regions after the monsoon season [16][17][18]23,43] (Tables 2 and 3).…”

Section: Phytoplankton Composition Of Taxasupporting

confidence: 83%

“…There was no significant difference in phytoplankton cell abundance between summer and autumn (p > 0.5). This lack of seasonal variation is likely due to the high cell abundance of cyanobacteria from late summer to early autumn (August-September) after the monsoon season, which is influenced by nutrient influx and elevated water temperatures, leading to an increase in Cyanophyceae cell abundance [5,43,44].…”

Section: Seasonal Variation Of Phytoplankton Abundance and Characteri...mentioning

confidence: 99%

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Temporal and Seasonal Variations in a Phytoplankton Community Structure in Artificial Lake Uiam, South Korea

Im,

Sim,

Hwang

et al. 2023

Water

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Lake Uiam is situated midway through a basin with dams at both the upstream and downstream ends; considerable environmental fluctuations have been observed here. However, studies on changes in environmental factors and plankton community fluctuations remain limited. This study analyzed the seasonal physicochemical factors and changes in the phytoplankton community structure in Lake Uiam (2015–2016). Organic matter, phosphorus, total suspended solids (TSS), and Chl-a concentrations were high in the summer. Seasonal changes in the dominant taxa followed the typical succession pattern of temperate phytoplankton, with Bacillariophyceae (Ulnaria acus) being dominant in spring and Cyanophyceae (Pseudanabaena limnetica) dominant in summer. However, Cryptophyceae (Rhodomonas sp.) showed unusually high dominance in autumn. Cell abundance showed no seasonal differences. Rhodomonas sp. was negatively correlated with water temperature, suggesting its dominance in spring and autumn. Cryptophyceae showed a significant correlation with Chl-a (0.708 **), indicating its contribution to spring Chl-a concentrations. Cryptophyceae (Rhodomonas sp. and Cryptomonas spp.) commonly appear in spring but are dominant in autumn in Lake Uiam. Despite disturbances from various environmental factors, they showed higher adaptability than other algae, resulting in their consistent appearance and dominance, differing from the general succession patterns of temperate phytoplankton.

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Section: Phytoplankton Composition Of Taxasupporting

confidence: 83%

Section: Seasonal Variation Of Phytoplankton Abundance and Characteri...mentioning

confidence: 99%

Temporal and Seasonal Variations in a Phytoplankton Community Structure in Artificial Lake Uiam, South Korea

Im,

Sim,

Hwang

et al. 2023

Water

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“…In 2019, reduced rainfall and elevated water temperatures primarily contributed to the prevalence of Microcystis species across the surveyed points, resulting in a decline in diversity, abundance, and evenness indices [78][79][80][81]. When comparing the average fluctuations in the cluster indices between 2019 and 2020, it was observed that 2019 exhibited more pronounced fluctuations, possibly due to higher rainfall in 2020, creating a more stable environment for phytoplankton growth [82,83]. Specifically, H ′ and e showed smaller fluctuations in 2020, suggesting a more balanced phytoplankton community in response to increased rainfall.…”

Section: Discussionmentioning

confidence: 99%

Assessing the Impact of Weirs on Water Quality and Phytoplankton Dynamics in the South Han River: A Two-Year Study

Kim,

Cho,

Kim

et al. 2024

Water

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This study investigates the ecological effects of weirs on water quality and phytoplankton communities in the South Han River (SHR) over a two-year period. By focusing on three key weirs—Kangcheon Weir, Yeoju Weir, and Ipo Weir—the research examines how artificial structures influence river hydrodynamics, nutrient cycles, and algal growth patterns. Utilizing water quality measurements, phytoplankton analysis, and environmental factor assessments, the study identifies significant fluctuations in water quality parameters and phytoplankton abundance across the surveyed points. The analysis reveals a direct correlation between environmental conditions such as temperature, flow rates, and nutrient concentrations, particularly nitrogen and phosphorus, and the proliferation of harmful cyanobacteria, notably Microcystis. This research highlights the critical role of comprehensive management strategies that consider hydraulic residence time, nutrient balance, and temperature regulation to mitigate the impacts of weirs on river ecosystems and improve water quality in the SHR.

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“…Water samples of different water layers were collected using a Plexiglas water sampler on sunny AM and stored in dark conditions at 4 °C for further indicator determination. The methods used for the testing of water quality were based on established standards [18]. Environmental vertical water column data were measured using a portable multiparameter water quality meter (Hach, Loveland, CO, USA).…”

Section: Sample Collection and Determinationmentioning

confidence: 99%

“…Water samples of different water layers were collected using a Plexiglas water sampler on sunny AM and stored in dark conditions at 4 • C for further indicator determination. The methods used for the testing of water quality were based on established standards [18].…”

Section: Sample Collection and Determinationmentioning

confidence: 99%

Phytoplankton Communities’ Response to Thermal Stratification and Changing Environmental Conditions in a Deep-Water Reservoir: Stochastic and Deterministic Processes

Wang,

Li,

et al. 2024

Sustainability

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Thermal stratification has become more extensive and prolonged because of global warming, and this change has had a significant impact on the distribution patterns of the phytoplankton communities. However, the response of phytoplankton community structures and assembly processes to thermal stratification is not fully understood. We predicted that the structure and assembly processes of phytoplankton communities would be affected by thermal stratification among water layers associated with environmental condition changes, reflecting certain patterns in temporal and spatial scales. Phytoplankton from Danjiangkou Reservoir were collected from October 2021 to July 2022 to verify this prediction. During the sampling period, Danjiangkou Reservoir remained thermally stratified with stability. The composition of the phytoplankton community in the surface layer significantly differed from that in both the thermocline and bottom layer. The phenomenon of thermal stratification affected the pattern of nitrogen and phosphorus distribution and, thus, the processes of the phytoplankton community structures. Deterministic processes had a greater influence on the assembly of the phytoplankton communities in the surface and bottom layers. In contrast, stochastic processes were more prevalent in the assembly of the thermocline phytoplankton community. The phytoplankton community within the thermocline layer exhibited a broader niche range than that in the surface and bottom layers, showing notable dissimilarity from that of the bottom layer. Canonical correspondence analysis (CCA) revealed that the vertical distributions of the phytoplankton communities were significantly correlated with NH4+-N, pH, and water temperature (WT). In summary, this study explained the distribution patterns of phytoplankton community structures and assembly processes in deep-water reservoirs during the stratification period. Additionally, the study explored the potential of using the distribution patterns of phytoplankton in stratified-state deep-water reservoirs under a subtropical–warm temperate climate as climate indicators in the context of global warming.

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Seasonal and interannual responses of blue-green algal taxa and chlorophyll to a monsoon climate, flow regimes, and N:P ratios in a temperate drinking-water reservoir

Cited by 16 publications

References 48 publications

Temporal and Seasonal Variations in a Phytoplankton Community Structure in Artificial Lake Uiam, South Korea

Temporal and Seasonal Variations in a Phytoplankton Community Structure in Artificial Lake Uiam, South Korea

Assessing the Impact of Weirs on Water Quality and Phytoplankton Dynamics in the South Han River: A Two-Year Study

Phytoplankton Communities’ Response to Thermal Stratification and Changing Environmental Conditions in a Deep-Water Reservoir: Stochastic and Deterministic Processes

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