Decadal soil warming decreased vascular plant above and belowground production in a subarctic grassland by inducing nitrogen limitation.

Autor: Fang C; Research Center for Global Changes and Ecosystem Carbon Sequestration & Mitigation, School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China.; PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, 2610, Belgium., Verbrigghe N; Flanders Research Institute for Agriculture, Fisheries and Food, Caritasstraat 39, Melle, 9090, Belgium., Sigurdsson BD; Agricultural University of Iceland, Hvanneyri, Borgarnes, IS-311, Iceland., Ostonen I; Institute of Ecology and Earth Sciences, University of Tartu, Tartu, 51003, Estonia., Leblans NIW; Climate Impacts Research Centre, Umeå University, Umeå, 90333, Sweden., Marañón-Jiménez S; CREAF, Cerdanyola del Vallès, Barcelona, 08193, Catalonia, Spain.; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Barcelona, 08193, Catalonia, Spain.; Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Spain., Fuchslueger L; Centre for Microbiology and Environmental Systems Science, University of Vienna, Djerassiplatz 1, 1030, Vienna, Austria., Sigurðsson P; Agricultural University of Iceland, Hvanneyri, Borgarnes, IS-311, Iceland., Meeran K; Department of Ecology, University of Innsbruck, 6020, Innsbruck, Austria., Portillo-Estrada M; PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, 2610, Belgium., Verbruggen E; PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, 2610, Belgium., Richter A; Centre for Microbiology and Environmental Systems Science, University of Vienna, Djerassiplatz 1, 1030, Vienna, Austria., Sardans J; CREAF, Cerdanyola del Vallès, Barcelona, 08193, Catalonia, Spain.; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Barcelona, 08193, Catalonia, Spain., Peñuelas J; CREAF, Cerdanyola del Vallès, Barcelona, 08193, Catalonia, Spain.; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Barcelona, 08193, Catalonia, Spain., Bahn M; Department of Ecology, University of Innsbruck, 6020, Innsbruck, Austria., Vicca S; PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, 2610, Belgium., Janssens IA; PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, 2610, Belgium.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2023 Oct; Vol. 240 (2), pp. 565-576. Date of Electronic Publication: 2023 Aug 07.
DOI: 10.1111/nph.19177
Abstrakt: 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.
(© 2023 The Authors New Phytologist © 2023 New Phytologist Foundation.)
Databáze: MEDLINE
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