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Related Experiment Video

Updated: Jul 15, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
08:16

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Published on: March 13, 2014

Saline-alkali gradients reshape soil microbial network complexity and niche breadth.

Hanghang Hou1, Xiaoling Zhang1, Siyuan Chen1

  • 1State Key Laboratory of Crop Stress Biology in Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China.

Frontiers in Microbiology
|July 14, 2026
PubMed
Summary

Saline-alkali soils impact microbial communities, with bacterial specialists showing greater shifts than fungal communities. Stress-survival pathways increase in bacteria under high saline-alkali conditions, indicating adaptation strategies.

Keywords:
generalistmicrobial networkniche breadthsaline-alkalispecialist

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10:30

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Published on: September 11, 2016

Area of Science:

  • Environmental microbiology
  • Soil science
  • Microbial ecology

Background:

  • Saline-alkali soils present significant osmotic, ionic, and alkaline challenges to soil microorganisms.
  • Understanding the distinct ecological strategies of bacteria and fungi along these gradients is crucial but remains poorly understood.

Purpose of the Study:

  • To investigate how bacterial and fungal communities and their functions respond to varying saline-alkali soil conditions.
  • To identify key microbial taxa, network characteristics, and functional pathways associated with saline-alkali soil degradation.

Main Methods:

  • Analysis of 30 soil samples from 10 sites across China.
  • Bacterial 16S rRNA and fungal ITS amplicon sequencing.
  • Soil physicochemical profiling, co-occurrence network analysis, niche breadth classification, and PICRUSt2 functional prediction.

Main Results:

  • Increased saline-alkali intensity correlated with reduced nutrient availability, lower microbial network complexity, and higher vulnerability.
  • Bacterial specialists exhibited more pronounced diversity and compositional changes than generalists; fungal communities were more stable.
  • Predicted bacterial functional profiles indicated a greater abundance of stress-survival pathways in high saline-alkali environments.

Conclusions:

  • Bacterial specialists are more sensitive to saline-alkali stress than fungal communities.
  • Microbial network structure and function are significantly altered by saline-alkali soil conditions.
  • Identified microbial features offer potential targets for managing saline-alkali soil degradation.