Deciphering the diversity patterns and community assembly of rare and abundant bacterial communities in a wetland system

Yang, Yan; Cheng, Kexin; Li, Kaihang; Jin, Yi; He, Xiaoqing

doi:10.1016/j.scitotenv.2022.156334

Cited by 66 publications

(24 citation statements)

References 70 publications

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“…To gain a basic mechanistic understanding of microbial ecology [ 56 ], it is essential to determine the environmental factors that shape the processes of microbial community assembly. Recent studies have revealed that pH [ 57 ], organic carbon content [ 58 ], salinity [ 59 ], available sulfur [ 60 ], and TN [ 33 ] are important factors influencing bacterial community assembly processes in different habitats. In our study, we found that bacterial community βNTI was significantly correlated with sediment total sulfur, with higher TS content promoting deterministic ratios.…”

Section: Discussionmentioning

confidence: 99%

“…Subsequently, the null distribution of βMNTD was created by randomizing the ASVs of the phylogenetic tree 999 times. Finally, the beta-nearest taxon index (βNTI), which is the standard deviation between the observed βMNTD values and the mean of the null βMNTD values was computed to indicate the ecological processes in specific communities [ 33 ]. βNTI values > 2 suggest that phylogenetic turnover is significantly greater than expected and is controlled by heterogeneous selection (variable selection); βNTI values < −2 mean that phylogenetic turnover is significantly less than expected and homogeneous selection dominants the community assembly.…”

Section: Methodsmentioning

confidence: 99%

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pH Drives Differences in Bacterial Community β-Diversity in Hydrologically Connected Lake Sediments

Yuan

Qin

et al. 2023

Microorganisms

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As microorganisms are very sensitive to changes in the lake environment, a comprehensive and systematic understanding of the structure and diversity of lake sediment microbial communities can provide feedback on sediment status and lake ecosystem protection. Xiao Xingkai Lake (XXL) and Xingkai Lake (XL) are two neighboring lakes hydrologically connected by a gate and dam, with extensive agricultural practices and other human activities existing in the surrounding area. In view of this, we selected XXL and XL as the study area and divided the area into three regions (XXLR, XXLD, and XLD) according to different hydrological conditions. We investigated the physicochemical properties of surface sediments in different regions and the structure and diversity of bacterial communities using high-throughput sequencing. The results showed that various nutrients (nitrogen, phosphorus) and carbon (DOC, LOC, TC) were significantly enriched in the XXLD region. Proteobacteria, Firmicutes, and Bacteroidetes were the dominant bacterial phyla in the sediments, accounting for more than 60% of the entire community in all regions. Non-metric multidimensional scaling analysis and analysis of similarities confirmed that β-diversity varied among different regions. In addition, the assembly of bacterial communities was dominated by a heterogeneous selection in different regions, indicating the important influence of sediment environmental factors on the community. Among these sediment properties, the partial least squares path analysis revealed that pH was the best predictor variable driving differences in bacterial communities in different regions, with higher pH reducing beta diversity among communities. Overall, our study focused on the structure and diversity of bacterial communities in lake sediments of the Xingkai Lake basin and revealed that high pH causes the β-diversity of bacterial communities in the sediment to decrease. This provides a reference for further studies on sediment microorganisms in the Xingkai Lake basin in the future.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

pH Drives Differences in Bacterial Community β-Diversity in Hydrologically Connected Lake Sediments

Yuan

Qin

et al. 2023

Microorganisms

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“…Bacteria play vital roles in wetland ecosystems by maintaining environmental and ecological processes as well as nutrient transformation and cycling [36]. Yang et al [37] showed that typical phyla in wetland ecosystems included Proteobacteria (21.18%), Bacteroidetes (27.3%), and Actinomycetes (14.1%). Fang et al [38] found that with the decrease of salinity, the dominant carbon-sequestering microbial taxa in lake sediments changed from the Desulfurizobia to Proteobacteria, and the main carbon sequestration pathway shifted from the energy-efficient WL pathway to the less energy-efficient CB cycle.…”

Section: Discussionmentioning

confidence: 99%

Microbial‐driven carbon fixation in natural wetland

Xiong

Zeng

et al. 2023

J Basic Microbiol

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With the development of global industrialization, carbon neutrality has become an issue that we must be paid attention to. Microorganisms not only have an important impact on the carbon chemical cycle between the Earth's biosphere and biogeography but also play a key role in maintaining the global organic carbon balance. Wetlands are the main reservoir of organic carbon in the mainland of China, and wetland carbon sinks are indispensable for China to achieve the goal of “dual carbon,” and China has taken the consolidation and improvement of wetland carbon sink capacity as an important part of the carbon peaking action plan. As a unique low‐latitude, high‐altitude seasonal plateau wetland in China, Napahai shows high research value. However, the role of microbes in maintaining dissolved organic carbon balance in this area has not been reported. In the study, six carbon fixation genes, accA, aclB, acsA, acsB, cbbL, and rbcL, were analyzed based on metagenomics to elucidate the rich genetic diversity, uniqueness and differences in the Napahai plateau wetland. It was found that the microbial diversity in the Napahai plateau wetland was different from other habitats. In addition, the aclB gene, a rare taxon with high genetic diversity and rich species in the Napahai plateau wetland, played a key role in the microbial metabolic pathway. Finally, the construction of a metabolic pathway through the Kyoto encyclopedia for genes and genomes revealed the contribution of microbes to carbon fixation and the role of microbes in maintaining the organic carbon balance of the Napahai plateau wetland.

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“…In microbial communities, generalist taxa have been shown to contribute more to stochastic processes, and specialist taxa to contribute more to deterministic processes, because specialists tend to have narrower tolerance to environmental changes (Liao et al 2016, Xu et al 2022). Similarly, studies on microbial communities have shown that rare taxa, which have narrower niche breadths, are more deterministically assembled while abundant taxa with wider niche breadths are more stochastically assembled (Gao et al 2020, Yang et al 2022). There has not, to our knowledge, been a similar study directly investigating among-taxa variation in stochastic and deterministic assembly processes for invertebrate communities.…”

Section: Introductionmentioning

confidence: 99%

Tropical invertebrate community assembly processes are robust to a gradient of land use intensity

Granville¹,

Barclay²,

Boyle³

et al. 2023

Preprint

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Understanding how community assembly processes drive biodiversity patterns is a central goal of community ecology. While it is generally accepted that ecological communities are assembled by both stochastic and deterministic processes, quantifying their relative importance remains challenging. Even fewer studies have investigated how the relative importance of stochastic and deterministic community assembly processes vary among taxa and along gradients of habitat degradation. Using data on 1,002 invertebrate species across six taxonomic groups in Malaysian Borneo, we quantified the importance of stochastic and deterministic community assembly processes across a gradient of logging intensity. Dispersal limitation was the dominant process at all levels of logging intensity. The relationship between logging and community assembly varied depending on the specific combination of taxa and stochasticity metric used, but, in general, the processes that govern invertebrate community assembly were remarkably robust to changes in land use intensity.

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Deciphering the diversity patterns and community assembly of rare and abundant bacterial communities in a wetland system

Cited by 66 publications

References 70 publications

pH Drives Differences in Bacterial Community β-Diversity in Hydrologically Connected Lake Sediments

pH Drives Differences in Bacterial Community β-Diversity in Hydrologically Connected Lake Sediments

Microbial‐driven carbon fixation in natural wetland

Tropical invertebrate community assembly processes are robust to a gradient of land use intensity

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