Distribution patterns and community assembly processes of eukaryotic microorganisms along an altitudinal gradient in the middle reaches of the Yarlung Zangbo River

Yang, Qing; Zhang, Peng; Li, Xiaodong; Yang, Shengxian; Chao, Xin; Liu, Huiqiu; Ba, Sang

doi:10.1016/j.watres.2023.120047

Cited by 30 publications

(3 citation statements)

References 47 publications

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“…Here, the abundance-based phylogenetic null model indicated that over a relatively short aquatic continuum fed by a headwater lake, homogeneous selection was the dominant process structuring both microbial groups and size fractions. Such dominance of homogeneous selection was previously noted in the Yarlung Zangbo River (Tibet) for microbial eukaryotes (Yang et al 2023) and in the Aulne River estuary (France) for both free-living and particle-based bacterial fractions (Urvoy et al 2022). Homogeneous selection was most pronounced in our large bacterial fraction, in line with previous findings in the aquatic continuum of the Tsurumi River (Japan), where this pattern was attributed to the homogeneity of metabolites in particles across sampling sites (Yokoyama and Kikuchi 2023).…”

Section: Community Drivers and Assembly Processessupporting

confidence: 90%

Size‐dependent community patterns differ between microbial eukaryotes and bacteria in a permafrost lake–river–sea continuum

Blais,

Matveev,

Lovejoy

et al. 2024

Limnology & Oceanography

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Microbial communities play a crucial role in ecosystem functioning, with contributions that can vary among taxonomic domains and size fractions. However, microbial assembly processes for bacteria and eukaryotes are seldom characterized together using size fractionation, especially in flowing waters. Here, we used amplicon sequencing combined with physicochemical measurements to determine how size fractionated (small fraction 0.22–3 μm; large fraction > 3 μm) community structure and diversity varied over a subarctic river continuum. We sampled the Sheldrake River, a 25 km river flowing through degrading discontinuous permafrost, from its lacustrine source through subarctic forest shrub tundra to its discharge plume in eastern Hudson Bay (Nunavik, Canada). Microbial community structure differed by size fraction and among habitats, with differences in the variables potentially driving community structure among size fractions and microbial domains. For the small size fraction, colored dissolved organic matter was a significant covariate of community variation for both bacteria and eukaryotes, consistent with the influence of landscape gradients. There were contrasting diversity patterns along the lake–river transect between bacterial size fractions. An abundance‐based approach indicated that for all communities, assembly processes were dominated by homogeneous selection, while an incidence‐based method showed dominance of heterogeneous selection for bacteria and homogenizing dispersal for microbial eukaryotes. Our findings show how different components of riverine microbial communities can have divergent patterns along the downstream continuum to the sea.

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Section: Community Drivers and Assembly Processessupporting

confidence: 90%

Size‐dependent community patterns differ between microbial eukaryotes and bacteria in a permafrost lake–river–sea continuum

Blais,

Matveev,

Lovejoy

et al. 2024

Limnology & Oceanography

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“…Effectively managing eutrophication in these waters is crucial for ensuring drinking water safety, protecting human health, and promoting sustainable economic and social development. The diversity and composition of phytoplankton communities are commonly utilized as reliable indicators of water quality due to their short life cycles and high sensitivity to environmental variations [8]. It is crucial to enhance our understanding of the phytoplankton composition in drinking water reservoirs and the environmental factors that influence the phytoplankton community at this stage.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Characteristics of Phytoplankton Communities in Drinking Water Source Reservoirs in Shenzhen, China

Liang,

Jin,

Feng

et al. 2023

Plants

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Phytoplankton diversity and community characteristics are closely associated with aquatic environmental factors. Understanding these dynamics can provide insights into the ecological health of water bodies. We investigate the spatial and temporal characteristics of phytoplankton communities in 27 drinking water source reservoirs in Shenzhen, China. As a method, we collected samples during the dry season in 2021 and the wet season in 2022, analyzed the alpha and beta diversities of phytoplankton communities, and correlated these with the environmental factors. The results reveal that Cyanobacteria dominate the phytoplankton communities in the Shenzhen reservoirs. Phytoplankton diversity is greater during the dry season. The algal composition varies spatially, and the phytoplankton diversity tends to decrease with increasing eutrophication. A co-occurrence network analysis indicates denser and stronger correlations among phytoplankton nodes during the wet season than dry season. Reservoirs with moderate eutrophication levels exhibit denser nodes and stronger correlations compared to those with low or high eutrophication levels. The chemical oxygen demand, water temperature, pH, and total nitrogen are identified as key influencers of the phytoplankton community structure. Our results contribute to the enhanced understanding of the spatial and temporal dynamics of phytoplankton communities in reservoirs in South China and provides insights into the management and conservation of these drinking water reservoirs.

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“…There are fewer comprehensive studies on the composition and functional characteristics of prokaryotic communities in sewer sediments. In recent years, high-throughput sequencing technologies have dramatically deepened our insights into prokaryotic communities in diverse ecosystems ( Song et al, 2023 ; Yang et al, 2023 ). Jin et al (2018) preliminarily explored the prokaryotic succession patterns in biofilms along urban sewage networks and explored the relationship between sewage quality and prokaryotic communities.…”

Section: Introductionmentioning

confidence: 99%

Toward an intensive understanding of sewer sediment prokaryotic community assembly and function

Xia,

Yu,

Yao

et al. 2023

Front. Microbiol.

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Prokaryotic communities play important roles in sewer sediment ecosystems, but the community composition, functional potential, and assembly mechanisms of sewer sediment prokaryotic communities are still poorly understood. Here, we studied the sediment prokaryotic communities in different urban functional areas (multifunctional, commercial, and residential areas) through 16S rRNA gene amplicon sequencing. Our results suggested that the compositions of prokaryotic communities varied significantly among functional areas. Desulfomicrobium, Desulfovibrio, and Desulfobacter involved in the sulfur cycle and some hydrolytic fermentation bacteria were enriched in multifunctional area, while Methanospirillum and Methanoregulaceae, which were related to methane metabolism were significantly discriminant taxa in the commercial area. Physicochemical properties were closely related to overall community changes (p < 0.001), especially the nutrient levels of sediments (i.e., total nitrogen and total phosphorus) and sediment pH. Network analysis revealed that the prokaryotic community network of the residential area sediment was more complex than the other functional areas, suggesting higher stability of the prokaryotic community in the residential area. Stochastic processes dominated the construction of the prokaryotic community. These results expand our understanding of the characteristics of prokaryotic communities in sewer sediment, providing a new perspective for studying sewer sediment prokaryotic community structure.

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Distribution patterns and community assembly processes of eukaryotic microorganisms along an altitudinal gradient in the middle reaches of the Yarlung Zangbo River

Cited by 30 publications

References 47 publications

Size‐dependent community patterns differ between microbial eukaryotes and bacteria in a permafrost lake–river–sea continuum

Size‐dependent community patterns differ between microbial eukaryotes and bacteria in a permafrost lake–river–sea continuum

Spatial and Temporal Characteristics of Phytoplankton Communities in Drinking Water Source Reservoirs in Shenzhen, China

Toward an intensive understanding of sewer sediment prokaryotic community assembly and function

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