Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Salinity Gradient Controls Microbial Community Structure And Assembly In Coastal Solar Salterns

Version 1 : Received: 24 January 2022 / Approved: 25 January 2022 / Online: 25 January 2022 (09:58:30 CET)

A peer-reviewed article of this Preprint also exists.

Song, T.; Liang, Q.; Du, Z.; Wang, X.; Chen, G.; Du, Z.; Mu, D. Salinity Gradient Controls Microbial Community Structure and Assembly in Coastal Solar Salterns. Genes 2022, 13, 385. Song, T.; Liang, Q.; Du, Z.; Wang, X.; Chen, G.; Du, Z.; Mu, D. Salinity Gradient Controls Microbial Community Structure and Assembly in Coastal Solar Salterns. Genes 2022, 13, 385.

Journal reference: Genes 2022, 13, 385
DOI: 10.3390/genes13020385

Abstract

Salinity acts as a critical environmental filter on microbial communities in natural systems, negatively affecting microbial diversity. However, how salinity affects the community assembly remains unclear. This study used Wendeng multi-pond saltern as a model to evaluate the prokaryotic community composition and diversity and quantify the relative importance of ecological processes across salinity gradients. Results showed that low saline salterns (45-80 g/L) exhibited higher bacterial diversity than those in high saline salterns (175-265 g/L). The relative abundance of taxa assigned to Halanaerobiaceae, Haloferacaceae, Desulfohalobiaceae, Phormidiaceae, Rohodobacteraceae, and Nitrococcaceae was higher with increasing salinity. Salinity and pH were the primary environmental factors that directly or indirectly determined the composition and diversity of prokaryotic communities. Microbial co-occurrence network dynamics were more complex in the sediment than in water of salterns. An infer Community Assembly Mechanisms by Phylogenetic-bin-based null model analysis (iCAMP) showed that microbial community assembly in sediment and water differed. Our findings provide more information about microbial community structure and the importance of various ecological processes in controlling microbial community diversity and succession along salinity gradients in water and sediment environments.

Keywords

multi-pond saltern; salinity gradients; microbial community; assembly; ecological processes

Subject

BIOLOGY, Ecology

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