Favaro et al. (2025): Nutrient-Rich Mineral-Associated Organic Matter Limits Carbon Storage Under Elevated Carbon Dioxide in a Low Phosphorus Eucalyptus Woodland Soil
Anna Favaro, Yolima Carrillo, Balwant Singh, Charles Warren and Feike A. Dijkstra, IN: Soil Biology & Biochemistry, www.doi.org/10.1111/gcb.70585
A rise in atmospheric CO₂ concentration can have positive or negative effects on soil organic carbon (SOC) pools, with likely impacts on soil nutrient availability, which can in turn, drive ecosystem-level impacts. Much of the soil nutrients are locked in the more stable mineral-associated organic matter (MAOM) pool compared to the more labile particulate organic matter (POM) pool, but how elevated CO₂ (eCO₂) affects these pools is unclear. In this study, the authors examined how 12 years of eCO₂ affected the POM and MAOM C, nitrogen (N), and phosphorus (P) pools at two different depths (0–10 and 10–20 cm) in a low P, native Eucalyptus woodland.