Microbial community composition unaffected by mycorrhizal plant removal in sub-arctic tundra
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Vegetation changes in a warming Arctic may affect plant-associated soil microbial communities with possible consequences for the biogeochemical cycling of carbon (C) and nitrogen (N). In a sub-arctic tundra heath, we factorially removed plant species with ecto- and ericoid mycorrhizal associations. After two years, we explored how mycorrhizal type-specific plant removal influences microbial communities, soil and microbial C and N pools, and extracellular enzymatic activities. Removal of ecto- and ericoid mycorrhizal plants did not change the soil fungal or bacterial community composition or their extracellular enzyme activities. However, ericoid plant removal decreased microbial C:N ratio, suggesting a stoichiometric effect decoupled from microbial community composition. In other words, microbial communities appear to show initial plasticity in response to major changes in tundra vegetation. This highlights the importance of longer-term perspectives when investigating the effects of vegetation changes on biogeochemical processes in Arctic ecosystems.
Originalsprog | Engelsk |
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Artikelnummer | 101342 |
Tidsskrift | Fungal Ecology |
Vol/bind | 69 |
Antal sider | 11 |
ISSN | 1754-5048 |
DOI | |
Status | Udgivet - 2024 |
Bibliografisk note
Funding Information:
We thank the Swedish Polar Research Secretariat and SITES for the logistical support of the work done at the Abisko Scientific Research Station. This study was financially supported by Helge Ax:son Johnsons stiftelse (Nr F22-0184) grant to SM; Swiss Polar Institute Exploratory Grant (SPIEG-2020-001) and Swiss National Science Foundation (grant PZ00P2_174047) grants to KG; Waldemar von Frenckells stiftelse, Oskar Ö University of Oulu & The Academy of Finland PROFI4 (grant 318930) grants to MV; and Carl XVI Gustafs 50-årsfond grant to EJK.
Publisher Copyright:
© 2024 The Authors
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