Comparison among the microbial communities in the lake, lake wetland, and estuary sediments of a plain river network

Huang, Wei; Xing, Chen; Wang, Kun; Chen, Junyi; Zheng, Binghui; Xia, Junqiang

doi:10.1002/mbo3.644

Cited by 50 publications

(29 citation statements)

References 56 publications

(79 reference statements)

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“…However, previous studies have mainly examined the deep‐sea environment, where pressure typically exceeds 10 MPa (Picard & Daniel, 2013). Reservoir sediments do not experience the same extreme pressures as the deep ocean sediments, but these systems often accumulate more nutrients and feature overall higher microbial community diversity and activity as compared to the deep ocean sediment (Huang et al., 2019; Wang et al, 2012a). Thus, it is important to assess how microbial communities in these freshwater systems and their activities respond to hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

Hydrostatic pressure influence activity and assembly of bacterial communities in reservoir sediments

Zhang

et al. 2021

Freshwater Biology

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Reservoir sediments are subjected to highly variable hydrostatic pressures, but little is known about the direct impacts of this environmental variable on microbial communities and biogeochemical processes mediated by microbes in the numerous deep reservoirs (>100 m) scattered across our planet. To address this gap, the organic matter degradation and community assembly of sediment bacteria were studied in bioreactors maintained under different hydrostatic pressures (0.5–3.0 MPa) and explored using 16S rRNA amplicon sequencing analysis. Our results showed that rates of CO2 and CH4 production and microbial activity decreased significantly with increasing pressure, at least when exceeding 1.0 MPa. In contrast, α‐diversity and community structure of the active (16S rRNA) and total (16S rRNA gene) bacterial communities did not show any significant response to the different hydrostatic pressures, but a co‐occurrence network demonstrated that interactions between bacterial populations were stronger at higher pressures (≥1.5 MPa). Moreover, ecological null model analyses revealed that when the pressure exceeded 1.5 MPa, the main assembly processes of bacterial communities changed from stochastic to deterministic. These findings corroborate an important role of pressure in the assembly and emerging interactions within sediment bacterial communities. Our results imply that increased hydrostatic pressure caused by dam constructions may hamper the metabolism of the sediment microbiota, and that this may result in enhanced sediment burial of nutrients and organic matter, at least when pressures exceed 1.0 MPa.

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Section: Introductionmentioning

confidence: 99%

Hydrostatic pressure influence activity and assembly of bacterial communities in reservoir sediments

Zhang

et al. 2021

Freshwater Biology

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“…Microorganisms are both the producers and decomposers of organic matter in aquatic ecosystems and play an important role in regulating the circulation of biogenic elements such as carbon, nitrogen, phosphorus, and sulfur in lakes [1,2]. Bacteria, as an important part of the microbial community, are mainly responsible for the mineralization and recycling of organic matter, while the recycling of dissolved organic carbon (DOC) in lakes is mainly fulfilled by heterotrophic bacteria [3][4][5]. Phytoplankton are the primary producers at the basis of aquatic food webs and can quickly respond to environmental changes [6].…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton and Bacterial Community Structure in Two Chinese Lakes of Different Trophic Status

et al. 2019

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Phytoplankton are the primary producers at the basis of aquatic food webs, and bacteria play an important role in energy flow and biochemical cycling in aquatic ecosystems. In this study, both the bacterial and phytoplankton communities were examined in the oligotrophic Lake Basomtso and the eutrophic Lake South (China). The results of this study showed that the phytoplankton density and diversity in the eutrophic lake were higher than those in the oligotrophic lake. Furthermore, Chlorophyta (68%) and Cryptophyta (24%) were the dominant groups in the eutrophic lake, while Bacillariophyta (95%) dominated in the oligotrophic lake. The bacterial communities in the waters and sediments of the two lakes were mainly composed of Proteobacteria (mean of 32%), Actinobacteria (mean of 25%), Bacteroidetes (mean of 12%), and Chloroflexi (mean of 6%). Comparative analysis showed that the abundance of bacteria in the eutrophic lake was higher than that in the oligotrophic lake (p < 0.05), but the bacterial diversity in the oligotrophic lake was higher than that in the eutrophic lake (p < 0.05). Finally, the bacterial abundance and diversity in the sediments of the two lakes were higher than those in the water samples (p < 0.05), and the Latescibacteria and Nitrospinae groups were identified only in the sediments. These results suggest that both the phytoplankton and bacterial communities differed considerably between the oligotrophic lake and the eutrophic lake.

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“…The sample from the Zhaohe River estuary in May (CSM3) was different from the other samples. Firmicutes, which were found in only this sample, are usually found in rivers, lakes and glaciers [80,81,82]. Their high enrichment may be due to the impact of water-transfer projects.…”

Section: Discussionmentioning

confidence: 96%

Spatial-Temporal Variation of Bacterial Communities in Sediments in Lake Chaohu, a Large, Shallow Eutrophic Lake in China

Zhang

Cheng

Gao

et al. 2019

IJERPH

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Sediment bacterial communities are critical for the circulation of nutrients in lake ecosystems. However, the bacterial community function and co-occurrence models of lakes have not been studied in depth. In this study, we observed significant seasonal changes and non-significant spatial changes in the beta diversity and community structure of sediment bacteria in Lake Chaohu. Through linear discriminant analysis effect size (LEfSe), we observed that certain taxa (from phylum to genus) have consistent enrichment between seasons. The sudden appearance of a Firmicutes population in spring samples from the Zhaohe River, an estuary of Lake Chaohu, and the dominance of Firmicutes populations in other regions suggested that exogenous pollution and environmental induction strongly impacted the assembly of bacterial communities in the sediments. Several taxa that serve as intermediate centers in Co-occurrence network analysis (i.e., Pedosphaeraceae, Phycisphaeraceae, Anaerolineaceae, and Geobacteraceae) may play an important role in sediments. Furthermore, compared with previous studies of plants and animals, the results of our study suggest that various organisms, including microorganisms, are resistant to environmental changes and/or exogenous invasions, allowing them to maintain their community structure.

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Comparison among the microbial communities in the lake, lake wetland, and estuary sediments of a plain river network

Cited by 50 publications

References 56 publications

Hydrostatic pressure influence activity and assembly of bacterial communities in reservoir sediments

Hydrostatic pressure influence activity and assembly of bacterial communities in reservoir sediments

Phytoplankton and Bacterial Community Structure in Two Chinese Lakes of Different Trophic Status

Spatial-Temporal Variation of Bacterial Communities in Sediments in Lake Chaohu, a Large, Shallow Eutrophic Lake in China

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