Microorganisms· 2026Q1
Study on the Differentiation of Microbial Communities Under Different Soil Types in the Typical Black Soil Area of Songnen Plain
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- Q1SCImago
- 2026year
Short summary
Brown soils (forestland) harbor microbial communities dominated by K-strategists (e.g., Mortierellomycota, Acidobacteriota) specializing in carbon sequestration, while black and meadow soils (cropland) are enriched with r-strategists (e.g., Proteobacteria, Bacteroidota) that rapidly utilize labile carbon.
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Key points
- Brown soil showed significantly higher organic carbon (p < 0.05) compared to black and meadow soils.
- Brown soil microbial communities were dominated by K-strategists (Mortierellomycota, Acidobacteriota) involved in carbon sequestration.
- Black and meadow soils were enriched with r-strategists (Proteobacteria, Bacteroidota, Sordariaceae) that rapidly utilize labile carbon.
- Total organic carbon and pH were identified as the primary environmental filters driving microbial community shifts.
AI-generated from the title and abstract; the full text is not read.
Abstract
Soil type imposes multilayered environmental filtering via physical structure, chemical properties, and resource availability, shaping microbial community assembly. Using 70 samples (black soil n = 27, meadow soil n = 32, and brown soil n = 11) from a typical black soil region of the Songnen Plain, we compared brown soil (forestland) with black soil and meadow soil (cropland) via 16S rRNA V3–V4 (primers 338F/806R) and fungal (ITS1, primers ITS1F/ITS2) amplicon sequencing and physicochemical analyses. The results showed (1) significantly higher organic carbon in brown soil than in black and meadow soils (p < 0.05); (2) a systematic shift along the r–K strategy axis, with K-strategists (e.g., Mortierellomycota and Acidobacteriota) dominating in brown soil, specializing in recalcitrant organic matter decomposition and carbon sequestration, and r-strategists (e.g., Proteobacteria, Bacteroidota, and Sordariaceae) enriched in black and meadow soils, rapidly utilizing labile carbon and driving carbon release. Redundancy analysis identified total organic carbon and pH as key environmental filters driving this shift. Our findings provide an ecological-strategy perspective for understanding land-use effects on soil microbiomes, informing carbon restoration and sustainable management in black soil regions.
The authors' abstract, as published at the source. Microorganisms, 2026 · DOI ↗
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Field: Soil Science
Soil ScienceAgricultural and Biological Sciences