Ectomycorrhizal and saprotrophic fungi respond differently to long-term experimentally increased snow depth in the High Arctic

Source: DOI:10.1002/mbo3.375 Changing climate is expected to alter precipitation patterns in the Arctic, with consequences for subsurface temperature and moisture conditions, community structure, and nutrient mobilization through microbial belowground processes. Here, we address the effect of increa...

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Bibliographic Details
Published in:MicrobiologyOpen
Main Authors: Mundra, Sunil, Halvorsen, Rune, Kauserud, Håvard, Bahram, Mohammad, Tedersoo, Leho, Elberling, Bo, Cooper, Elisabeth J., Eidesen, Pernille Bronken
Format: Article in Journal/Newspaper
Language:English
Published: Wiley Open Access. MicrobiologyOpen 2016
Subjects:
VDP::Matematikk og Naturvitenskap: 400
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920
Arctic ecology
climate change
fungal richness and communities
Illumina sequencing
Spitsbergen
Svalbard
temporal variation
winter warming
Arctic
Climate change
permafrost
Online Access:https://hdl.handle.net/10037/10759
https://doi.org/10.1002/mbo3.375
Description
Summary:Source: DOI:10.1002/mbo3.375 Changing climate is expected to alter precipitation patterns in the Arctic, with consequences for subsurface temperature and moisture conditions, community structure, and nutrient mobilization through microbial belowground processes. Here, we address the effect of increased snow depth on the variation in species richness and community structure of ectomycorrhizal (ECM) and saprotrophic fungi. Soil samples were collected weekly from mid- July to mid- September in both control and deep snow plots. Richness of ECM fungi was lower, while saprotrophic fungi was higher in increased snow depth plots relative to controls. [Correction added on 23 September 2016 after first online publication: In the preceding sentence, the richness of ECM and saprotrophic fungi were wrongly interchanged and have been fixed in this current version.] ECM fungal richness was related to soil NO 3- N, NH 4- N, and K; and saprotrophic fungi to NO 3- N and pH. Small but significant changes in the composition of saprotrophic fungi could be attributed to snow treatment and sampling time, but not so for the ECM fungi. Delayed snow melt did not influence the temporal variation in fungal communities between the treatments. Results suggest that some fungal species are favored, while others are disfavored resulting in their local extinction due to long- term changes in snow amount. Shifts in species composition of fungal functional groups are likely to affect nutrient cycling, ecosystem respira- tion, and stored permafrost carbon.

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