Reforestation significantly enriches soil microbial carbon, nitrogen, and phosphorus cycling genes but simplifies their co-occurrence network

Summary

This 2025 study investigates how reforestation affects soil microbial functional genes responsible for nutrient cycling. The authors report that whilst reforestation significantly enriches the genetic potential for carbon, nitrogen, and phosphorus transformations in soil, it concurrently simplifies the co-occurrence networks among these genes—suggesting that whilst functional capacity may increase, microbial community interactions become less complex. The findings contribute to understanding how land-use transitions alter soil biogeochemical cycling pathways at the molecular level.

UK applicability

Given the UK's woodland expansion targets and soil health priorities, these findings are potentially relevant to assessing microbial responses to native woodland creation on former agricultural land. However, applicability depends on whether the study was conducted in comparable soil and climate zones; the lack of geographic metadata limits direct transfer to UK conditions.

Key measures

Abundance of microbial genes encoding carbon, nitrogen, and phosphorus cycling enzymes; co-occurrence network topology and complexity; microbial community composition

Outcomes reported

The study examined how reforestation affects the abundance and co-occurrence patterns of soil microbial genes involved in carbon, nitrogen, and phosphorus cycling. The research quantified changes in microbial genetic diversity and network complexity following afforestation.

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