Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients

Yao, Zhiyuan; Du, Shicong; Liang, Chunling; Zhao, Yueji; Dini‐Andreote, Francisco; Wang, Kai; Zhang, Demin

doi:10.1128/aem.02602-18

Cited by 53 publications

(38 citation statements)

References 58 publications

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“…A relatively higher m value was observed for the intertidal zone than the supratidal, confirming that the dispersal ability of microbial species in the intertidal zone was higher than the supratidal counterparts ( Figure 7A,B). A similar finding was also reported by Yao et al in 2019, illustrating that random dispersal played a more important role in shaping estuarine sediment microbial communities close to the sea, as compared to those far from the sea [61].…”

Section: Discussionsupporting

confidence: 88%

Environmental Filtering Drives the Assembly of Habitat Generalists and Specialists in the Coastal Sand Microbial Communities of Southern China

Wang

Cao

et al. 2019

Microorganisms

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Coastal sands harbor diverse microbial assemblages that play a critical role in the biogeochemical cycling of beach ecosystems. However, little is known about the relative importance of the different ecological processes underlying the assembly of communities of sand microbiota. Here, we employed 16S rDNA amplicon sequencing to investigate the sand microbiota of two coastal beaches, in southern China. The results showed that sand microbial assemblages at intertidal and supratidal zones exhibited contrasting compositions that can be attributed to environmental filtering by electric conductivity. A consistent pattern of habitat generalists and specialists of sand microbiota was observed among different beach zones. Null and neutral model analyses indicated that the environmental filtering was mainly responsible for supratidal microbial communities, while the neutral processes could partially influence the assembly of intertidal communities. Moreover, environmental filtering was found to shape the habitat specialists, while random dispersal played a major role in shaping generalists. The neutral model analysis revealed that the habitat generalists exceeding the neutral prediction harbored a relatively higher proportion of microbial taxa than the specialist counterparts. An opposite pattern was observed for taxa falling below the neutral prediction. Collectively, these findings offer a novel insight into the assembly mechanisms of coastal sand microbiota.

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Section: Discussionsupporting

confidence: 88%

Environmental Filtering Drives the Assembly of Habitat Generalists and Specialists in the Coastal Sand Microbial Communities of Southern China

Wang

Cao

et al. 2019

Microorganisms

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“…In contrast, stochastic processes controlled planktonic bacterial assembly, and the underlying processes shifted dramatically from homogeneous selection (river) to drift (ocean) with increasing salinity. Our sediment results were highly similar to those studies of the benthic bacterial community assembly in coastal sediments such as the Zhangjiang River Estuary (Gao et al ., 2021), Bohai Sea, South Yellow Sea and East China Sea (Li et al ., 2021) or Hangzhou Bay (Yao et al ., 2019). Our water results were consistent with the studies with the surface ocean microbiota (Logares et al ., 2020) and the river planktonic prokaryotic communities in Jiulong River (Isabwe et al ., 2018).…”

Section: Discussionmentioning

confidence: 99%

Assembly processes and source tracking of planktonic and benthic bacterial communities in the Yellow River estuary

Wang

et al. 2021

Environmental Microbiology

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Summary Estuaries connect rivers with the ocean and are considered transition regions due to the continuous inputs from rivers. Microbiota from different sources converge and undergo succession in these transition regions, but their assembly mechanisms along environmental gradients remain unclear. Here, we found that salinity had a stronger effect on planktonic than on benthic microbial communities, and the dominant planktonic bacteria changed more distinctly than the dominant benthic bacteria with changes in salinity. The planktonic bacteria in the brackish water came mainly from seawater, which was confirmed in the laboratory, whereas the benthic bacteria were weakly affected by salinity, which appeared to be a mixture of the bacteria from riverine and oceanic sediments. Benthic bacterial community assembly in the sediments was mainly controlled by homogeneous selection and almost unaffected by changes in salinity, the dominant assemblage processes for planktonic bacteria changed dramatically along the salinity gradient, from homogeneous selection in freshwater to drift in seawater. Our results highlight that salinity is the key driver of estuarine microbial succession and that salinity is more important in shaping planktonic than benthic bacterial communities in the Yellow River estuary.

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“…For example, the whole bacterial community, as well as generalists and specialists in our networks followed a non-random assembly pattern (Tables 1, S3). This means that the biogeographical pattern can be predicted for the majority of bacterial community (Yao et al 2019).…”

Section: Co-existence Patterns Of Generalists and Specialistsmentioning

confidence: 99%

Biogeography and co‐occurrence patterns of bacterial generalists and specialists in three subtropical marine bays

Zhang

Wilkinson

et al. 2020

Limnology & Oceanography

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Recent research has greatly expanded our understanding of microbial metacommunities in aquatic ecosystems. However, patterns at the mesoscale are still poorly understood. We present the first simultaneous analyses of the biogeography and co-occurrence patterns of generalists and specialists marine bacteria from three subtropical bays of China and test for signals of ecological processes (i.e., stochastic and deterministic processes) in biogeography and community assembly. Results showed that compared to specialists, bacterial generalists were less diverse, and were more widely dispersed in the three subtropical bays. Network analysis indicated that both habitat generalists and specialists showed non-random co-occurrence patterns, and specialists had a more complex co-occurrence pattern than generalists. Further, specialists co-occurrence network exhibited distinct robust structure compared to generalists, indicating that the both taxa showed different network stability. Our null models indicated that the generalists and specialists were primarily shaped by deterministic processes-such as variable selection. However, deterministic processes played a greater role in the community variation of specialists (84%) than generalists (56%). The study has broadened our understanding of generalists and specialists distribution in the bacterioplankton; further revealing the dominant roles of similar ecological mechanisms (deterministic processes) in shaping the community assembly. The differences in complex and stable co-occurrence pattern between generalists and specialists could be driven by deterministic processes. By considering the roles of species traits and ecological processes, we provide a deeper mechanistic understanding of bacterial biogeographical and coexistence patterns.

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Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients

Cited by 53 publications

References 58 publications

Environmental Filtering Drives the Assembly of Habitat Generalists and Specialists in the Coastal Sand Microbial Communities of Southern China

Environmental Filtering Drives the Assembly of Habitat Generalists and Specialists in the Coastal Sand Microbial Communities of Southern China

Assembly processes and source tracking of planktonic and benthic bacterial communities in the Yellow River estuary

Biogeography and co‐occurrence patterns of bacterial generalists and specialists in three subtropical marine bays

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