Abstract
Purpose
The objective of this study was to investigate the characteristics of sediment organic phosphorus (Po) driven by the microbial community during the ecological restoration of a plateau wetland.
Materials and methods
Twenty surface sediment samples were collected from the Caohai wetland, China. A series of analysis methods were used, including Ivanoff extraction, enzymatic hydrolysis, solution 31P nuclear magnetic resonance (31P-NMR), and high-throughput sequencing technology.
Results
The concentrations of the total Po were in the range 564.66 to 751.30 mg kg−1, among which Ful-Po was the dominant component with a proportion of 38.67–45.37%. In the enzymatically hydrolyzable Po, phosphomonoester was the main fraction accounting for 19.58–67.87%, while it made up 52.91–68.98% of the Po determined by 31P-NMR. The biogeochemical feature of Po indicated the high releasing risk of bioavailable Po from the sediment to the overlying water in the Caohai plateau wetland. Anthropogenic input was the dominant source of Po in the sediments, followed by the internal biological processes. Two thousand sixty-six OTUs were clustered in the phoD gene-harboring communities and were dominated by the Proteobacteria phylum and Rubrobacter genus. The redundancy analysis (RDA), correlation network analysis, and structural equation modeling (SEM) suggested the direct and/or indirect (coupling the C and N cycles) contribution of phoD gene communities to P fractions.
Conclusion
This study established the influence of microbes on P fractions and provided a valuable understanding of the biogeochemical cycling of P in sediment from an ecologically restored wetland.
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Acknowledgements
We thank the Guizhou Caohai National Nature Reserve Management Committee for their sampling assistance.
Funding
This study was financially supported by the National Natural Science Fund (U1612441), the Guizhou Provincial Science and Technology Projects (No. [2022] Y218, No. [2020]1Y168), and the Youth Fund from Guizhou Institute of Biology (No. [2021]08).
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YC L: conceptualization, methodology, investigation, formal analysis, writing–original draft; JJ: investigation, visualization, validation, writing–review and editing; BW: writing–review and editing; JH: investigation; ZM Z: methodology; SQ Z: funding acquisition, supervision.
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Long, Y., Jiang, J., Wu, B. et al. Phosphatase phoD gene community changes organic phosphorus in sediment from Caohai plateau wetland. J Soils Sediments 22, 2317–2328 (2022). https://doi.org/10.1007/s11368-022-03245-5
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DOI: https://doi.org/10.1007/s11368-022-03245-5