Evaluation of Microbial Assemblages in Various Saline-Alkaline Soils Driven by Soluble Salt Ion Components

Abstract

Land degraded by salinization and alkalization is widely distributed globally and involves a wide range of ecosystem types. However, the knowledge of the indigenous microbial assemblages and their roles in various saline-alkaline soils is limited. This study demonstrated microbial assemblages in various saline-alkaline soils from different regions of Inner Mongolia and revealed the key driving factors to influence microbiome. The correlation network analysis indicates the difference in adaptability of bacterial and fungal communities under stimulation by saline-alkaline stress: fungal community shows higher tolerance, stability, and resilience to various saline-alkaline soils than a bacterial community. The keystone bacteria and fungi that have potential adaptability to various saline-alkaline environments are further identified, and they may confer benefits in restoring saline-alkaline soils by their own effects or assisting plants. For salt-rich soils in different regions, the soluble salt ion components are the major determinant to drive microbial assemblages of different saline-alkaline soils, rather than salinity. Thus, these saline-alkaline soils are clustered into sulfated, chlorinated, and soda-type saline-alkaline soils. Multivariate analysis reveals unique, dominant, and common microbial taxa in three saline-alkaline soils. This result of the conceptual mode indicates that potential roles of unique and dominant microbial taxa on regulating saline-alkaline functions are more vital.

Salinity significantly affects methane oxidation and methanotrophic community in Inner Mongolia lake sediments

“…A few nodes were connector generalists (Zi ≤ 2.5; Pi >0.62). The connector organizes various modules into a complete community and is considered a key member of the network (Zhang et al, 2019(Zhang et al, , 2021b. In this study, the connectors included 14 (in all samples), 6 (in HRS), and 33 (in HOS) OTUs; the node number of connectors generalists in HRS were significantly fewer than that in HOS (Supplementary Table S7).…”

“…Positive and negative correlations of co-occurrence networks can be used to assess the collaboration or competitive relationships between bacterial species; the relationships among coexisting microorganisms reflect microbial responses to the environment (Weiss et al, 2016;Zhang et al, 2021b). The regulation of accociation between microorganisms under the condition of environmental pollution may be a survival strategy (Luo et al, 2022).…”

Effect of Different Amendments and Inorganic Nutrient Management Approaches in Correcting Sodicity under Paddy Eco System

“…Out of many factor of soil degradation, excess salt is prominent one which led to evolution of salt affected. The saline-alkali situation has been perceived as one of the most significant factors causing soil degradation throughout the world [1] salinity and sodicity development in soil are of universally notable, can cause more negative impact on crop production. Increasing the soil salinity and sodicity are serious worldwide issue and may be even increase rapidly in the future [2].…”

Exploring Microbial Resource of Different Rhizocompartments of Dominant Plants Along the Salinity Gradient Around the Hypersaline Lake Ejinur

“…According to the LEfSe analysis (LDA > 4.0), the microbial taxa shown in the results ( Figure 4 ) were defined as the dominant taxa ( Richa et al, 2017 ; Zhao et al, 2020 ; Zhang et al, 2021 ). These dominant taxa can be used as indicator species for different plants around the salt lake and may assist plants to adapt to unfavorable environments.…”