Summary
This 2025 study examines how pedogenetic development in volcanic ash soils—the progressive weathering and mineralogical transformation during soil formation—structures the composition and nutrient-cycling function of resident microbial communities. The authors present evidence that soil developmental stage, rather than soil age alone, is a primary determinant of the microbial pool's capacity to mediate nutrient availability in andisols and related volcanic soils. The findings suggest that pedogenesis and soil mineralogy warrant consideration as key predictive variables in models of microbial-driven nutrient supply in these agriculturally significant soil types.
UK applicability
Volcanic ash soils are not widespread in the UK; however, the mechanistic principles linking soil mineralogy to microbial nutrient cycling may inform understanding of nutrient availability in other soil orders managed for agriculture. The findings could support development of soil management practices that sustain microbial function across different soil developmental contexts.
Key measures
Soil microbial community composition (likely via molecular techniques such as DNA sequencing), microbial functional capacity for nutrient cycling, soil mineralogy and weathering indices, nutrient availability metrics across pedogenetic stages
Outcomes reported
The study characterised how pedogenetic stage in volcanic ash soils influences soil microbial community composition and functional capacity for nutrient cycling. Measurements linked soil mineralogical development to microbial-mediated nutrient availability across different andisol maturity stages.
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