CORDIS OpenAire Sygma Bielefeld Academic Search Engine (BASE) DOAJ Crossref Microsoft Academic Graph Europe PubMed Central u:cris Permanent Hosting, Archiving and Indexing of Digital Resources and Assets VIRTA UnpayWall HELDA - Digital Repository of the University of Helsinki PubMed Central European Union Open Data Portal https://www.nature.com/articles/s41467-019-11993-1.pdf https://doi.org/10.1038/s41467-019-11993-1 Nature Communications Open Access 2019-09-04 Abstract<p>Boreal forests are ecosystems with low nitrogen (N) availability that store globally significant amounts of carbon (C), mainly in plant biomass and soil organic matter (SOM). Although crucial for future climate change predictions, the mechanisms controlling boreal C and N pools are not well understood. Here, using a three-year field experiment, we compare SOM decomposition and stabilization in the presence of roots, with exclusion of roots but presence of fungal hyphae and with exclusion of both roots and fungal hyphae. Roots accelerate SOM decomposition compared to the root exclusion treatments, but also promote a different soil N economy with higher concentrations of organic soil N compared to inorganic soil N accompanied with the build-up of stable SOM-N. In contrast, root exclusion leads to an inorganic soil N economy (i.e., high level of inorganic N) with reduced stable SOM-N build-up. Based on our findings, we provide a framework on how plant roots affect SOM decomposition and stabilization.</p> roots 0106 biological sciences 330 Nitrogen Science ta1171 Hyphae Models, Biological Plant Roots 01 natural sciences Article LITTER DECOMPOSITION Soil POLYPHENOLS CARBON SEQUESTRATION soil organic matter Taiga SDG 13 - Climate Action SUGAR MAPLE Biomass Organic Chemicals forest ecology 106026 Ecosystem research Ecosystem Soil Microbiology TANNINS 2. Zero hunger 106022 Mikrobiologie ECTOMYCORRHIZAL FUNGI MYCORRHIZA Q ta1182 Forestry 04 agricultural and veterinary sciences Plants 15. Life on land Carbon Environmental sciences NITROGEN Boreal forests 106026 Ökosystemforschung 13. Climate action SDG 13 – Maßnahmen zum Klimaschutz 106022 Microbiology ta1181 0401 agriculture, forestry, and fisheries COMMUNITIES STORAGE Adamczyk, Bartosz, Sietiö, Outi-Maaria, Straková, Petra, Prommer, Judith, Wild, Birgit, Hagner, Marleena, Pihlatie, Mari, Fritze, Hannu, Richter, Andreas, Heinonsalo, Jussi, 2019-09-04 journalpaper Abstract<p>Boreal forests are ecosystems with low nitrogen (N) availability that store globally significant amounts of carbon (C), mainly in plant biomass and soil organic matter (SOM). Although crucial for future climate change predictions, the mechanisms controlling boreal C and N pools are not well understood. Here, using a three-year field experiment, we compare SOM decomposition and stabilization in the presence of roots, with exclusion of roots but presence of fungal hyphae and with exclusion of both roots and fungal hyphae. Roots accelerate SOM decomposition compared to the root exclusion treatments, but also promote a different soil N economy with higher concentrations of organic soil N compared to inorganic soil N accompanied with the build-up of stable SOM-N. In contrast, root exclusion leads to an inorganic soil N economy (i.e., high level of inorganic N) with reduced stable SOM-N build-up. Based on our findings, we provide a framework on how plant roots affect SOM decomposition and stabilization.</p> Plant roots increase both decomposition and stable organic matter formation in boreal forest soil 10.1038/s41467-019-11993-1