1. Soil microbial community and associated functions response to salt stresses: Resistance and resilience.
- Author
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Chen Z, Zhou T, Huang G, and Xiong Y
- Abstract
Soil salinization leads to significant changes in microbial communities and ecological functions, but their resistance and resilience to salinity stress are not well understood. In this study, we analyzed changes in bacterial community and ecological functions, i.e., CO
2 and N2 O emissions, under NaCl and Na2 SO4 stresses, as well as after the removal of these stresses. The results showed that slight to severe NaCl and Na2 SO4 stresses significantly increased alpha diversity of bacterial community and altered the structure of bacterial community. In contrast, NaCl and Na2 SO4 stresses both linearly reduced CO2 and N2 O emissions, with NaCl stress exhibiting a greater suppression effect than Na2 SO4 stress. After salinity leaching, the bacterial community traits-diversity, richness, complexity, and stability-generally recovered, with stronger recovery observed under greater salinity stress. However, the structure of bacterial community did not recover, even for those subjected to slight NaCl and Na2 SO4 stresses. The CO2 and N2 O emission fluxes recovered in the late stage of the recovery period, particularly in the treatments that experienced moderate NaCl and severe Na2 SO4 stresses. Additionally, the CO2 and N2 O emissions were mainly dominated by the salinity-sensitive subcommunity. Generally, salinity leaching shifted the microbial community to an alternative state but facilitated the recovery of microbial diversity, complexity, stability, and functions. The findings provided implications for the management and reclamation of saline-alkali farmland., (Copyright © 2024. Published by Elsevier B.V.)- Published
- 2024
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