ArticleFrontiers in microbiology2026
Moisture-mediated resource availability shapes rhizosphere and bulk soil microbial structure and function post-rainfall.
Article in Frontiers in microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Rainfall pulses drive rapid ecological changes in alpine grasslands, but their compartment-specific effects on short-term soil microbial dynamics remain unclear. Methods: We investigated the structural and functional responses of rhizosphere versus bulk soil microbiomes associated with Results: Rainfall triggered compartment-specific shifts in microbial community assembly. In the rhizosphere, rainfall significantly reduced alpha diversity (Chao1 and Richness indices) but enhanced community evenness (Simpson and Shannon indices), whereas bulk soil diversity remained relatively stable. DNA-based functional profiling revealed a short-term shift in the rhizosphere from a pre-rain "carbon-oriented" metabolic potential to increased relative abundance of genes involved in central carbon pathways, amino acid degradation, and chemotaxis post-rainfall. Notably, sequences affiliated with Discussion: These findings demonstrate that rainfall pulses trigger rapid, niche-dependent changes in soil microbiomes at the DNA level, driven by moisture-mediated shifts in resource availability, and highlight distinct ecological strategies in rhizosphere and bulk soil compartments.
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