Effects of Deforestation and Reforestation on Soil Biodiversity and Ecosystem Function

In a new study, researchers report that removing agricultural forest cover and later restoring it through afforestation can reshape soil life in ways that ripple into ecosystem performance. The work, published in Nature Communications, focuses on how the transition from deforestation to managed re-greening alters soil biodiversity and the capacity of ecosystems to deliver multiple functions.

Soil organisms—ranging from microbial communities to soil fauna—are often the hidden engines of nutrient cycling and organic matter decomposition. When land use changes rapidly, these communities can be destabilized, leading to shifts in how efficiently soils process carbon and nitrogen. The authors frame afforestation not simply as vegetation recovery, but as a multi-year experiment in rebuilding belowground ecological networks.

Using field data and community profiling approaches, the team compared soils across land-use stages: after agricultural deforestation and following subsequent afforestation. They tested whether biodiversity changes translate into measurable differences in ecosystem multifunctionality—an integrated outcome reflecting processes such as nutrient availability, soil fertility indicators, and carbon-related stability.

Their results suggest that deforestation tends to reduce key components of soil biodiversity, disrupting trophic interactions and weakening functional redundancy. In contrast, afforestation partially reverses these trends, promoting reassembly of microbial and soil biological diversity. However, recovery was not uniform; some community groups rebounded more quickly than others.

Crucially, the study links biodiversity trajectories to ecosystem multifunctionality. As soil communities diversified, functional performance improved, but the strength of these effects depended on how afforestation altered soil conditions over time. Factors such as litter inputs, soil moisture, and nutrient regimes likely mediated the pace of recovery.

The authors also highlight that ecosystems may exhibit “partial functionality” during restoration, where certain functions improve while others lag behind. This nuance matters for climate and land management goals, where time horizons often extend beyond short-term vegetation establishment.

Overall, the research emphasizes that afforestation can be beneficial for restoring belowground biodiversity, but ecological outcomes depend on the pathway of land transformation. For policymakers, the findings argue for restoration plans that monitor soil biology—not just canopy cover—to ensure that multifunctionality is truly rebuilt.