Salinity controls soil microbial community structure and function in coastal estuarine wetlands
Open Access
- 18 October 2020
- journal article
- research article
- Published by Wiley in Environmental Microbiology
- Vol. 23 (2), 1020-1037
- https://doi.org/10.1111/1462-2920.15281
Abstract
Soil salinity acts as a critical environmental filter on microbial communities, but the consequences for microbial diversity and biogeochemical processes are poorly understood. Here, we characterized soil bacterial communities and microbial functional genes in a coastal estuarine wetland ecosystem across a gradient (~ 5 km) ranging from oligohaline to hypersaline habitats by applying the PCR‐amplified 16S rRNA genes sequencing and microarray‐based GeoChip 5.0, respectively. Results showed that saline soils in marine intertidal and supratidal zone exhibited higher bacterial richness and Faith's phylogenetic diversity than that in the freshwater‐affected habitats. The relative abundance of taxa assigned to Gammaproteobacteria, Bacteroidetes, and Firmicutes was higher with increasing salinity, while those affiliated with Acidobacteria, Chloroflexi, and Cyanobacteria were more prevalent in wetland soils with low salinity. The phylogenetic inferences demonstrated the deterministic role of salinity filtering on the bacterial community assembly processes. The abundance of most functional genes involved in carbon degradation and nitrogen cycling correlated negatively with salinity, except for the hzo gene, suggesting a critical role of the anammox process in tidal affected zones. Overall, the salinity filtering effect shapes the soil bacterial community composition, and soil salinity act as a critical inhibitor in the soil biogeochemical processes in estuary ecosystems.Keywords
Funding Information
- Fundamental Research Funds for the Central Universities (310430001)
This publication has 76 references indexed in Scilit:
- The SILVA ribosomal RNA gene database project: improved data processing and web-based toolsNucleic Acids Research, 2012
- Geographic distance and pH drive bacterial distribution in alkaline lake sediments across Tibetan PlateauEnvironmental Microbiology, 2012
- Molecular ecological network analysesBMC Bioinformatics, 2012
- Molecular characterization of a mosaic locus in the genome of 'CandidatusLiberibacter asiaticus'BMC Microbiology, 2012
- UCHIME improves sensitivity and speed of chimera detectionBioinformatics, 2011
- QIIME allows analysis of high-throughput community sequencing dataNature Methods, 2010
- PyNAST: a flexible tool for aligning sequences to a template alignmentBioinformatics, 2009
- Pyrosequencing-Based Assessment of Soil pH as a Predictor of Soil Bacterial Community Structure at the Continental ScaleApplied and Environmental Microbiology, 2009
- Scale-Free Networks: A Decade and BeyondScience, 2009
- Cytoscape: A Software Environment for Integrated Models of Biomolecular Interaction NetworksGenome Research, 2003