Microbial community composition unaffected by mycorrhizal plant removal in sub-arctic tundra

Sammanfattning

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.

Nyckelord

Ectomycorrhizal fungi; Ericoid mycorrhizal fungi; Plant-microbial-soil interactions; Tundra vegetation change; Functional type removal experiment; Heath; Bacteria

Publicerad i

Fungal Ecology
2024, volym: 69, artikelnummer: 101342
Utgivare: ELSEVIER SCI LTD

SLU författare

• Krab, Eveline

  • Institutionen för mark och miljö, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Markvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1016/j.funeco.2024.101342

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/130101