Microbial community day-to-day dynamics during a spring algal bloom event in a tributary of Three Gorges Reservoir

Tan, Bingyuan; Hu, Pengfei; Niu, Xiaoxu; Zhang, Xing; Liu, Jiakun; Frenken, Thijs; Hamilton, Paul B.; Haffner, G. Douglas; Chaganti, Subba Rao; Nwankwegu, Amechi S.

doi:10.1016/j.scitotenv.2022.156183

Cited by 12 publications

(2 citation statements)

References 79 publications

(67 reference statements)

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“…A study conducted in Xiangxi Bay, a TGR tributary, discovered that the upper reaches displayed the highest diversity of picoeukaryotes, while the middle reaches exhibited the lowest species diversity (Li et al 2018 ). The TGD impoundment is likely to alter water chemistry and physical attributes, reducing self-purification capacity, and increasing pollutant retention, ultimately leading to an impact on biodiversity (Tan et al 2022 ; Xiang et al 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Biogeographic patterns of meio- and micro-eukaryotic communities in dam-induced river-reservoir systems

Hu,

Wei,

Liu

et al. 2024

Appl Microbiol Biotechnol

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Although the Three Gorges Dam (TGD) is the world’s largest hydroelectric dam, little is known about the spatial–temporal patterns and community assembly mechanisms of meio- and micro-eukaryotes and its two subtaxa (zooplankton and zoobenthos). This knowledge gap is particularly evident across various habitats and during different water-level periods, primarily arising from the annual regular dam regulation. To address this inquiry, we employed mitochondrial cytochrome c oxidase I (COI) gene-based environmental DNA (eDNA) metabarcoding technology to systematically analyze the biogeographic pattern of the three communities within the Three Gorges Reservoir (TGR). Our findings reveal distinct spatiotemporal characteristics and complementary patterns in the distribution of meio- and micro-eukaryotes. The three communities showed similar biogeographic patterns and assembly processes. Notably, the diversity of these three taxa gradually decreased along the river. Their communities were less shaped by stochastic processes, which gradually decreased along the longitudinal riverine-transition-lacustrine gradient. Hence, deterministic factors, such as seasonality, environmental, and spatial variables, along with species interactions, likely play a pivotal role in shaping these communities. Environmental factors primarily drive seasonal variations in these communities, while hydrological conditions, represented as spatial distance, predominantly influence spatial variations. These three communities followed the distance-decay pattern. In winter, compared to summer, both the decay and species interrelationships are more pronounced. Taken together, this study offers fresh insights into the composition and diversity patterns of meio- and micro-eukaryotes at the spatial-temporal level. It also uncovers the mechanisms behind community assembly in various environmental niches within the dam-induced river-reservoir systems. Key points • Distribution and diversity of meio- and micro-eukaryotes exhibit distinct spatiotemporal patterns in the TGR. • Contribution of stochastic processes in community assembly gradually decreases along the river. • Deterministic factors and species interactions shape meio- and micro-eukaryotic community. Graphical Abstract

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Section: Discussionmentioning

confidence: 99%

Biogeographic patterns of meio- and micro-eukaryotic communities in dam-induced river-reservoir systems

Hu,

Wei,

Liu

et al. 2024

Appl Microbiol Biotechnol

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“…The mainstem in the upper and middle reaches of SZL and LIA does not show high variability indicators, while the LID has a significant decrease in the indicators of minimum flow at different time scales, which may affect the overwintering conditions of species in the marsh or reduce the ability of organisms to cope with extreme weather [45][46][47]. In addition, the reduced-flow river can easily cause algal blooms [48,49], which exacerbates the risk of algal blooms in the Fu River Basin. In addition, LID is the last hydrological station that flows into Poyang Lake.…”

Section: Hydrological Alteration Assessment In Fuhe River Basinmentioning

confidence: 99%

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Wang

Huang

Zhu

et al. 2022

IJERPH

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Hydropower construction and climate change have aggravated river hydrological changes, which have reduced the water flow regime in the Ruhe River Basin. The reduced flow of the river seriously affected the water supply of nearby residents and the operation of the river ecosystem. Therefore, in order to alleviate the contradiction between water use for hydropower facilities and environmental water use, the urgent need is to explore the ecological flow-threshold of rivers. This study took the Fuhe River Basin as the research object, and summarized the monitoring data of eight hydrological stations from recent decades. Based on this, we explored the response law of P−IBI and flow, a tool to quickly measure the health of the ecosystem. Through the response relationship between alterations in environmental factors of the river and phytoplankton index of biotic integrity (P−IBI), it was determined that environmental flow was the dominant influencing factor of P−IBI. According to P−IBI, the threshold of environmental discharge in the Fuhe River was limited to 273~826.8 m3/s. This study established a regulatory framework for the river flow of large rivers by constructing P−IBI and determining the critical thresholds of environmental flow by constraining the constitution. These results provide a theoretical basis for better planning and improvement of river ecosystem restoration and river utilization.

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Microalgae from the Three Gorges Reservoir for Carbon Dioxide Fixation and Biodiesel Production

et al. 2023

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Microbial community day-to-day dynamics during a spring algal bloom event in a tributary of Three Gorges Reservoir

Cited by 12 publications

References 79 publications

Biogeographic patterns of meio- and micro-eukaryotic communities in dam-induced river-reservoir systems

Biogeographic patterns of meio- and micro-eukaryotic communities in dam-induced river-reservoir systems

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Microalgae from the Three Gorges Reservoir for Carbon Dioxide Fixation and Biodiesel Production

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