Suspended particulates mediate bacterial community coalescence in different habitats of a large sediment-laden river

Pan, Baozhu; Liu, Xinyuan; Sun, He; Ding, Yitong; Hou, Yali; zhu, Qingwei

doi:10.1016/j.ecolind.2022.109462

Cited by 10 publications

(1 citation statement)

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“…Moreover, comparable contributions of dispersal limitations and heterogeneous selection processes to community assembly were observed in sediment niches. Dispersal limitations emphasize the spatial constraints or barriers that impede bacterial diffusion in sediments (Pan et al, 2022), whereas heterogeneous selection highlights the selective pressures imposed by diverse environmental conditions (He et al, 2022). In contrast, our findings revealed a pronounced influence of deterministic processes, specifically heterogeneous selection, on the assembly of bacterial communities on root surfaces.…”

Section: Discussionmentioning

confidence: 54%

Linking ecological niches to bacterial community structure and assembly in polluted urban aquatic ecosystems

Sun,

Ye,

Huang

et al. 2023

Front. Microbiol.

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IntroductionBacterial communities play crucial roles in the functioning and resilience of aquatic ecosystems, and their responses to water pollution may be assessed from ecological niches. However, our understanding of such response patterns and the underlying ecological mechanisms remains limited.MethodsIn this study, we comprehensively investigated the effects of water pollution on the bacterial structure and assembly within different ecological niches, including water, sediment, submerged plant leaf surfaces, and leaf surfaces, using a 16S high-throughput sequencing approach.ResultsEcological niches had a greater impact on bacterial community diversity than pollution, with a distinct enrichment of unique dominant phyla in different niches. This disparity in diversity extends to the bacterial responses to water pollution, with a general reduction in α-diversity observed in the niches, excluding leaf surfaces. Additionally, the distinct changes in bacterial composition in response to pollution should be correlated with their predicted functions, given the enrichment of functions related to biogeochemical cycling in plant surface niches. Moreover, our study revealed diverse interaction patterns among bacterial communities in different niches, characterized by relatively simply associations in sediments and intricate or interconnected networks in water and plant surfaces. Furthermore, stochastic processes dominated bacterial community assembly in the water column, whereas selective screening of roots and pollution events increased the impact of deterministic processes.DiscussionOverall, our study emphasizes the importance of ecological niches in shaping bacterial responses to water pollution. These findings improve our understanding of the complicated microbial response patterns to water pollution and have ecological implications for aquatic ecosystem health.

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Section: Discussionmentioning

confidence: 54%