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Community assembly of comammox Nitrospira in coastal wetlands across southeastern China

Yongxin Lin, Kam Tang Orcid Logo, Guiping Ye, Ping Yang, Hang-Wei Hu, Chuan Tong, Yong Zheng, Mengmeng Feng, Milin Deng, Zi-Yang He, Ji-Zheng He Orcid Logo

Applied and Environmental Microbiology

Swansea University Author: Kam Tang Orcid Logo

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DOI (Published version): 10.1128/aem.00807-23

Abstract

Complete ammonia oxidizers (comammox Nitrospira) are ubiquitous in coastal wetland sediments and play an important role in nitrification. Our study examined the impact of habitat modifications on comammox Nitrospira communities in coastal wetland sediments across tropical and subtropical regions of so...

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Published in: Applied and Environmental Microbiology
ISSN: 0099-2240 1098-5336
Published: American Society for Microbiology 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa64449
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Abstract: Complete ammonia oxidizers (comammox Nitrospira) are ubiquitous in coastal wetland sediments and play an important role in nitrification. Our study examined the impact of habitat modifications on comammox Nitrospira communities in coastal wetland sediments across tropical and subtropical regions of southeastern China. Samples were collected from 21 coastal wetlands in five provinces where native mudflats were invaded by Spartina alterniflora and subsequently converted to aquaculture ponds. The results showed that comammox Nitrospira abundances were mainly influenced by sediment grain size rather than by habitat modifications. Compared to S. alterniflora marshes and native mudflats, aquaculture pond sediments had lower comammox Nitrospira diversity, lower clade A.1 abundance, and higher clade A.2 abundance. Sulfate concentration was the most important factor controlling the diversity of comammox Nitrospira. The response of comammox Nitrospira community to habitat change varied significantly by location, and environmental variables accounted for only 11.2% of the variations in community structure across all sites. In all three habitat types, dispersal limitation largely controlled the comammox Nitrospira community assembly process, indicating the stochastic nature of these sediment communities in coastal wetlands.
Keywords: comammox Nitrospira, habitat change, aquaculture reclamation, coastal wetlands, nitrification
College: Faculty of Science and Engineering
Funders: This work was financially supported by the National Natural Science Foundation of China (41930756, 42077041) and Natural Resources Science and Technology Innovation Project of Fujian Province (KY-090000–04-2022-012).

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