The Soil Microbiome of GLORIA Mountain Summits in the Swiss Alps

Détails

ID Serval
serval:BIB_DEF74C4F803A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The Soil Microbiome of GLORIA Mountain Summits in the Swiss Alps
Périodique
Frontiers in Microbiology
Auteur(s)
Adamczyk Magdalene, Hagedorn Frank, Wipf Sonja, Donhauser Johanna, Vittoz Pascal, Rixen Christian, Frossard Aline, Theurillat Jean-Paul, Frey Beat
ISSN
1664-302X
Statut éditorial
Publié
Date de publication
2019
Volume
10
Pages
1080
Langue
anglais
Résumé
While vegetation has intensively been surveyed on mountain summits, limited knowledge exists about the diversity and community structure of soil biota. Here, we study how climatic variables, vegetation, parent material, soil properties, and slope aspect affect the soil microbiome on ten GLORIA (Global Observation Research Initiative in Alpine environments) mountain summits ranging from the lower alpine to the nival zone in Switzerland. At these summits we sampled soils from all four aspects and examined how the bacterial and fungal communities vary by using Illumina MiSeq sequencing.
We found that mountain summit soils contain highly diverse microbial communities with a total of 10,406 bacterial and 6,291 fungal taxa. Bacterial α-diversity increased with increasing soil pH and decreased with increasing elevation, whereas fungal α-diversity did not change significantly. Soil pH was the strongest predictor for microbial β-diversity. Bacterial and fungal community structures exhibited a significant positive relationship with plant communities, indicating that summits with a more distinct plant composition also revealed more distinct microbial communities. The influence of elevation was stronger than aspect on the soil microbiome. Several microbial taxa responded to elevation and soil pH. Chloroflexi and Mucoromycota were significantly more abundant on summits at higher elevations, whereas the relative abundance of Basidiomycota and Agaricomycetes decreased with elevation. Most bacterial OTUs belonging to the phylum Acidobacteria were indicators for siliceous parent material and several OTUs belonging to the phylum Planctomycetes were associated with calcareous soils. The trends for fungi were less clear. Indicator OTUs belonging to the genera Mortierella and Naganishia showed a mixed response to parent material, demonstrating their ubiquitous and opportunistic behaviour in soils. Overall, fungal communities responded weakly to abiotic and biotic factors. In contrast, bacterial communities were strongly influenced by environmental changes suggesting they will be strongly affected by future climate change and associated temperature increase and an upward migration of vegetation.
Our results provide the first insights into the soil microbiome of mountain summits in the European Alps that are shaped as a result of highly variable local environmental conditions and may help to predict responses of the soil biota to global climate change.
Mots-clé
alpine, bacteria, fungi, climate change, mountain summit, soil, GLORIA
Open Access
Oui
Création de la notice
16/05/2019 8:12
Dernière modification de la notice
21/08/2019 5:12
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