Psychrophilic Microorganisms in Alpine Soils

Margesin, Rosa

doi:10.1007/978-3-7091-0136-0_14

Cited by 12 publications

(5 citation statements)

References 78 publications

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“…The alpine soil microbiome plays key roles in the processes of weathering, pedogenesis, biogeochemical cycling, and plant colonisation of bare soils, and thus crucially shapes the nutrient cycling of alpine ecosystems (Nemergut et al, 2007; Frey et al, 2010; Margesin, 2012; Donhauser and Frey, 2018). Despite harsh environmental conditions alpine soils harbour a considerable microbial diversity (Rime et al, 2015; Frey et al, 2016; Malard and Pearce, 2018).…”

Section: Introductionmentioning

confidence: 99%

The Soil Microbiome of GLORIA Mountain Summits in the Swiss Alps

et al. 2019

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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 10 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.

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Section: Introductionmentioning

confidence: 99%

The Soil Microbiome of GLORIA Mountain Summits in the Swiss Alps

et al. 2019

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“…Microbial communities may be shaped seasonally as response to the large and frequent (diurnal) temperature fluctuations, regular soil freeze–thaw and wet–dry events (Nemergut et al 2005; Margesin 2012). Studies on the effect of seasons on diversity and abundance of alpine soil bacterial communities in the Colorado Rocky Mountains reported major changes in bacterial structure through seasons.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and altitudinal changes of culturable bacterial and yeast diversity in Alpine forest soils

et al. 2016

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The effect of altitude and season on abundance and diversity of the culturable heterotrophic bacterial and yeast community was examined at four forest sites in the Italian Alps along an altitude gradient (545–2000 m). Independently of altitude, bacteria isolated at 0 °C (psychrophiles) were less numerous than those recovered at 20 °C. In autumn, psychrophilic bacterial population increased with altitude. The 1194 bacterial strains were primarily affiliated with the classes Alpha-, Beta-, Gammaproteobacteria, Spingobacteriia and Flavobacteriia. Fifty-seven of 112 operational taxonomic units represented potential novel species. Strains isolated at 20 °C had a higher diversity and showed similarities in taxa composition and abundance, regardless of altitude or season, while strains isolated at 0 °C showed differences in community composition at lower and higher altitudes. In contrast to bacteria, yeast diversity was season-dependent: site- and altitude-specific effects on yeast diversity were only detected in spring. Isolation temperature affected the relative proportions of yeast genera. Isolations recovered 719 strains, belonging to the classes Dothideomycetes, Saccharomycetes, Tremellomycetes and Mycrobotryomycetes. The presence of few dominant bacterial OTUs and yeast species indicated a resilient microbial population that is not affected by season or altitude. Soil nutrient contents influenced significantly abundance and diversity of culturable bacteria, but not of culturable yeasts.Electronic supplementary materialThe online version of this article (doi:10.1007/s00792-016-0874-2) contains supplementary material, which is available to authorized users.

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“…1 C). Most common bacteria could be isolated at 25°C, but some rare bacteria could be isolated at 4°C without the inhibitory effect of dominant species, promoting the diversity of bacteria ( Margesin 2012 ; Collins and Margesin 2019 ). The numbers of dominant species mainly isolated at 4°C were Arthrobacter humicola (7.25%, 24 strains), while the numbers of dominant species mainly isolated at 25°C were Streptomyces flavovirens (8.19%, 27 strains), Streptomyces xanthophaeus (7.58%, 25 strains), Streptomyces canus (6.36%, 21 strains), and Bacillus siamensis (4.24%, 14 strains) (Fig.…”

Section: Resultsmentioning

confidence: 99%

Diversity of Culturable Bacteria Isolated from Highland Barley Cultivation Soil in Qamdo, Tibet Autonomous Region

Pan

Zhou

Dawa

et al. 2021

Polish Journal of Microbiology

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The soil bacterial communities have been widely investigated. However, there has been little study of the bacteria in Qinghai-Tibet Plateau, especially about the culturable bacteria in highland barley cultivation soil. Here, a total of 830 individual strains were obtained at 4°C and 25°C from a highland barley cultivation soil in Qamdo, Tibet Autonomous Region, using fifteen kinds of media. Seventy-seven species were obtained, which belonged to 42 genera and four phyla; the predominant phylum was Actinobacteria (68.82%), followed by Proteobacteria (15.59%), Firmicutes (14.29%), and Bacteroidetes (1.30%). The predominant genus was Streptomyces (22.08%, 17 species), followed by Bacillus (6.49%, five species), Micromonospora (5.19%, four species), Microbacterium (5.19%, four species), and Kribbella (3.90%, three species). The most diverse isolates belonged to a high G+C Gram-positive group; in particular, the Streptomyces genus is a dominant genus in the high G+C Gram-positive group. There were 62 species and 33 genera bacteria isolated at 25°C (80.52%), 23 species, and 18 genera bacteria isolated at 4°C (29.87%). Meanwhile, only eight species and six genera bacteria could be isolated at 25°C and 4°C. Of the 77 spe¬cies, six isolates related to six genera might be novel taxa. The results showed abundant bacterial species diversity in the soil sample from the Qamdo, Tibet Autonomous Region.

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Psychrophilic Microorganisms in Alpine Soils

Cited by 12 publications

References 78 publications

The Soil Microbiome of GLORIA Mountain Summits in the Swiss Alps

The Soil Microbiome of GLORIA Mountain Summits in the Swiss Alps

Seasonal and altitudinal changes of culturable bacterial and yeast diversity in Alpine forest soils

Diversity of Culturable Bacteria Isolated from Highland Barley Cultivation Soil in Qamdo, Tibet Autonomous Region

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