Abstract
Nitrogen is an essential component of living organisms and a major nutrient that limits life on Earth. Until now, freely available nitrogen mainly comes from atmospheric nitrogen, but most organisms rely on bioavailable forms of nitrogen, which depends on the complex network of microorganisms with a wide variety of metabolic functions. Microbial-mediated nitrogen cycling contributes to the biogeochemical cycling of wetlands, but its specific microbial abundance, composition, and distribution need to be studied. Based on the metagenomic data, we described the composition and functional characteristics of microbial nitrogen cycle-related genes in the Napahai plateau wetland. Six nitrogen cycling pathways existed, such as dissimilatory nitrate reduction, denitrification, nitrogen fixation, nitrification, anammox, and nitrate assimilation. Most genes related to the nitrogen cycling in this region come from bacteria, mainly from Proteobacteria and Acidobacteria. Habitat types and nitrogen cycle-related genes largely explained the relative abundance of total nitrogen pathways. Phylogenetic trees were constructed based on nitrogen cycle-related genes from different habitats and sources, combined with PCoA analysis, most of them clustered separately, indicating richness and uniqueness. Some microbial groups seemed to be special or general in the nitrogen cycling. In conclusion, it suggested that microorganisms regulated the N cycling process, and may lead to N loss throughout the wetland, thus providing a basis for further elucidation of the microbial regulation of N cycling processes and the Earth’s elemental cycles.
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Data availability
Quality control readings of the 9 metagenomics are stored in the NCBI Sequence Reading Archive (SRA), bio project login number PRJNA846364, data access URL https://www.ncbi.nlm.nih.gov/bioproject/?term=PRJNA846364.
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This research is funded by the National Natural Science Foundation of China (32160294, 31960033) and Young Talents Support Program of Yunnan Province (YNWR-QNBJ-2019-202).
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YL: design, investigation, data curation, writing—original draft; LX, HY, KZ: data curation; YW, WZ: supervision; HL, XJ: supervision, writing—review and editing. All authors have contributed to the manuscript. All authors read and approved the manuscript.
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Li, Y., Xiong, L., Yu, H. et al. Function and distribution of nitrogen-cycling microbial communities in the Napahai plateau wetland. Arch Microbiol 205, 357 (2023). https://doi.org/10.1007/s00203-023-03695-6
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DOI: https://doi.org/10.1007/s00203-023-03695-6