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Differences in sediment microbial community structure and co-occurrence network in different seasons

  • Sediments, Sec 4 • Sediment-Ecology Interactions • Research Article
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Abstract

Purpose

River sediments play a crucial role in wetland ecosystems, as they are essential for the biogeochemical cycling of river nutrients. In this study, we examined the structure of microbial communities in sediments located in the Li River basin in North China and investigated how these communities and physicochemical properties respond to seasonal changes.

Materials and methods

Sixty-four sediment samples were collected over four consecutive seasons in the Li River basin. High-throughput sequencing of the V3-V4 high-variance region of the 16S rRNA gene of bacteria in sediments was performed to compare the differences of microbiota in different seasons. In addition, we also analyzed the sediment’s physicochemical properties.

Results and discussion

Seasonal variations had a significant impact on the physicochemical properties of the sediments, including pH, TP, NO3-N, and NH4-N. The microbial diversity and abundance also varied with the changing seasons. Mantel tests revealed that pH, TP, NO3-N, and NH4-N were the primary factors influencing the microbial community. Additionally, co-occurrence network analysis showed that microbial communities exhibited closer and more complex associations during autumn and summer. Based on PICRUSt predictions, there was a seasonal decline in genes related to amino acid and carbohydrate metabolism from autumn to summer.

Conclusions

The seasonal variations in sediment pH, TP, NO3-N, and NH4-N significantly impact the microbial community structure and co-occurrence networks, making them key factors affecting the overall structure of the microbial community.

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Data availability

The data supporting the results of this study are available from the corresponding author (Biao Liu) upon reasonable request.

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Funding

This work was supported by the Project supported by the Science and Technology Research of Henan Province, China (222102320395); the Basic research plan for key scientific research projects of higher education institutions in Henan Province, China (20B610001, 21B610003); Training Program for Young Key Teachers of higher education institutions in Henan Province, China (2020GGJS218); and Innovative training program for college students in Henan Province, China (202211765048).

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Correspondence to Biao Liu.

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The authors declare no competing interests.

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Responsible editor: Xia Liang

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Liu, B., Guo, F., Xie, P. et al. Differences in sediment microbial community structure and co-occurrence network in different seasons. J Soils Sediments 23, 3539–3549 (2023). https://doi.org/10.1007/s11368-023-03613-9

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  • DOI: https://doi.org/10.1007/s11368-023-03613-9

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