20.500.12556/DiRROS-21108 Phosphorus limitation promotes soil carbon storage in a boreal forest exposed to long-term nitrogen fertilization Forests play a crucial role in global carbon cycling by absorbing and storing significant amounts of atmospheric carbon dioxide. Although boreal forests contribute to approximately 45% of the total forest carbon sink, tree growth and soil carbon sequestration are constrained by nutrient availability. Here, we examine if long-term nutrient input enhances tree productivity and whether this leads to carbon storage or whether stimulated microbial decomposition of organic matter limits soil carbon accumulation. Over six decades, nitrogen, phosphorus, and calcium were supplied to a Pinus sylvestris-dominated boreal forest. We found that nitrogen fertilization alone or together with calcium and/or phosphorus increased tree biomass production by 50% and soil carbon sequestration by 65% compared to unfertilized plots. However, the nonlinear relationship observed between tree productivity and soil carbon stock across treatments suggests microbial regulation. When phosphorus was co-applied with nitrogen, it acidified the soil, increased fungal biomass, altered microbial community composition, and enhanced biopolymer degradation capabilities. While no evidence of competition between ectomycorrhizal and saprotrophic fungi has been observed, key functional groups with the potential to reduce carbon stocks were identified. In contrast, when nitrogen was added without phosphorus, it increased soil carbon sequestration because microbial activity was likely limited by phosphorus availability. In conclusion, the addition of nitrogen to boreal forests may contribute to global warming mitigation, but this effect is context dependent. carbon storage microbial communities boreal forest fertilization shranjevanje ogljika mikrobne združbe borealni gozdovi gnojenje true false true Angleški jezik Slovenski jezik Neznano 2024-12-23 11:19:01 2024-12-23 11:19:01 2024-12-24 03:35:46 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 23. 12. 2024; str. 1-14 iss. 9 [article no. e17516] Vol. 30 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*1 1757-1707 10.1111/gcb.17516 220238339 https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.17516 1 55ab7b86-c117-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29922 RAZ_Richy_Etienne_2024.pdf RAZ_Richy_Etienne_2024.pdf 1 536005BE2E747CA17616DF3C6FC019F6 8cf07ccced3a50b1dff34c44325f4a32274851e178fa397f35f0eded29f35204 60259cd9-c117-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29923 Gozdarski inštitut Slovenije 0 0 0