Soil erosion has long been debated as either a source or sink of atmospheric carbon. A new framework in Communications Earth & Environment argues that the debate misses a bigger point: erosion redistributes carbon across landscape positions, changing its ecological role, not just its quantity. A ton of carbon in an active hillslope soil does not behave like a ton buried in a floodplain. Instead of focusing only on carbon stocks and fluxes, the authors propose interpreting erosion as a reorganization of the soil functional layer. That shift links carbon redistribution to changes in soil stability and ecosystem functioning, and helps explain why reducing carbon burial can sometimes improve ecosystem health. The perspective has practical implications for carbon accounting and land management, suggesting that quantity-based budgets alone are insufficient.
