Decadal soil warming decreased vascular plant above and below ground production in a subarctic grassland by inducing nitrogen limitation
Fang, Chao (Nanjing University of Information Science and Technology. School of Applied Meteorology)
Verbrigghe, Niel (Flanders Research Institute for Agriculture, Fisheries and Food)
Sigurdsson, Bjarni D. (Agricultural University of Iceland)
Ostonen, Ivika (University of Tartu. Institute of Ecology and Earth Sciences)
Leblans, Niki I. W. (Umeå University. Climate Impacts Research Centre)
Marañón Jiménez, Sara (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Fuchslueger, Lucia (University of Vienna. Centre for Microbiology and Environmental Systems Science)
Sigurðsson, Páll (Agricultural University of Iceland)
Meeran, Kathiravan (University of Innsbruck. Department of Ecology)
Portillo-Estrada, Miguel (University of Antwerp. Department of Biology)
Verbruggen, Erik (University of Antwerp. epartment of Biology)
Richter, Andreas (University of Vienna. Centre for Microbiology and Environmental Systems Science)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Bahn, Michael (University of Innsbruck. Institute of Ecology)
Vicca, Sara (University of Antwerp. Department of Biology)
Janssens, Ivan (University of Antwerp. Department of Biology)

Fecha:	2023
Resumen:	Below and aboveground vegetation dynamics are crucial in understanding how climate warming may affect terrestrial ecosystem carbon cycling. In contrast to aboveground biomass, the response of belowground biomass to long-term warming has been poorly studied. - Here, we characterized the impacts of decadal geothermal warming at two levels (on average +3. 3°C and +7. 9°C) on below and aboveground plant biomass stocks and production in a subarctic grassland. - Soil warming did not change standing root biomass and even decreased fine root production and reduced aboveground biomass and production. Decadal soil warming also did not significantly alter the root-shoot ratio. The linear stepwise regression model suggested that following 10 yr of soil warming, temperature was no longer the direct driver of these responses, but losses of soil N were. Soil N losses, due to warming-induced decreases in organic matter and water retention capacity, were identified as key driver of the decreased above and belowground production. The reduction in fine root production was accompanied by thinner roots with increased specific root area. - These results indicate that after a decade of soil warming, plant productivity in the studied subarctic grassland was affected by soil warming mainly by the reduction in soil N.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Biomass distribution ; Grasses ; Nitrogen limitation ; Temperature increase ; Vascular plants
Publicado en:	The new phytologist, Vol. 240, issue 2 (Oct. 2023) , p. 565-576, ISSN 1469-8137

DOI: 10.1111/nph.19177

Disponible a partir de: 2024-10-30 Postprint

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