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Bacterial community assembly in a typical estuarine marsh with multiple environmental gradients.
- Source :
-
Applied & Environmental Microbiology . Mar2019, Vol. 85 Issue 6, p1-39. 39p. - Publication Year :
- 2019
-
Abstract
- Bacterial communities play essential roles in estuarine marsh ecosystems, but the interplay of ecological processes underlying their community assembly are poorly understood. Here, we studied the sediment bacterial communities along a linear gradient extending from the water-land junction toward a high-marsh, using the 16S rRNA gene amplicon sequencing. Bacterial community composition differed significantly between sediment transects. Physico-chemical properties, particularly sediment nutrient levels [i.e., total nitrogen (TN) and available phosphorus (AP)], as well as sediment physical structure and pH (P < 0.05) were strongly associated with the overall community variations. In addition, the topological properties of bacterial co-occurrence networks varied with the distance to the water-land junction. Both node- and network-level topological features revealed the bacterial network of sediments farthest from the junction to be less intense in complexity and interactions compared with other sediments. Phylogenetic null modelling analysis showed a progressive transition from stochastic to deterministic community assembly for the water-land junction sites toward the emerging terrestrial system. Taken together, this study provides a detailed outline of the distribution pattern of sediment bacterial community across the estuarine marsh and inform on the mechanisms and processes mediating bacterial community assembly in marsh soils. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ESTUARINE ecology
*BACTERIAL communities
*MARSHES
Subjects
Details
- Language :
- English
- ISSN :
- 00992240
- Volume :
- 85
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Applied & Environmental Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 135203132
- Full Text :
- https://doi.org/10.1128/AEM.02602-18