Substantial compositional turnover of fungal communities in an alpine ridge‐to‐snowbed gradient

Yao, Fang; Vik, Unni; Brysting, Anne K.; Carlsen, Tor; Halvorsen, Rune; Kauserud, Håvard

doi:10.1111/mec.12437

Cited by 38 publications

(58 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…EcM associations on the roots of B. vivipara were described by Hesselman34, and have later been confirmed in numerous studies353637383940. HTS of the entire fungal communities of individual B. vivipara plants have previously successfully been conducted404142. In this study we are in the same manner analyzing the overall bacterial communities associated with whole root systems of B. vivipara plants.…”

supporting

confidence: 62%

Different bacterial communities in ectomycorrhizae and surrounding soil

Vik

Logares

Blaalid

et al. 2013

Sci Rep

Self Cite

View full text Add to dashboard Cite

Several eukaryotic symbioses have shown to host a rich diversity of prokaryotes that interact with their hosts. Here, we study bacterial communities associated with ectomycorrhizal root systems of Bistorta vivipara compared to bacterial communities in bulk soil using pyrosequencing of 16S rRNA amplicons. A high richness of Operational Taxonomic Units (OTUs) was found in plant roots (3,571 OTUs) and surrounding soil (3,476 OTUs). The community composition differed markedly between these two environments. Actinobacteria, Armatimonadetes, Chloroflexi and OTUs unclassified at phylum level were significantly more abundant in plant roots than in soil. A large proportion of the OTUs, especially those in plant roots, presented low similarity to Sanger 16S rRNA reference sequences, suggesting novel bacterial diversity in ectomycorrhizae. Furthermore, the bacterial communities of the plant roots were spatially structured up to a distance of 60 cm, which may be explained by bacteria using fungal hyphae as a transport vector. The analyzed ectomycorrhizae presents a distinct microbiome, which likely influence the functioning of the plant-fungus symbiosis.

show abstract

supporting

confidence: 62%

Different bacterial communities in ectomycorrhizae and surrounding soil

Vik

Logares

Blaalid

et al. 2013

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…; Yao et al . ). Although we did not observe senescent or dead roots, we cannot exclude that some of these OTUs may be associated with unrecognized dead parts of the roots.…”

Section: Discussionmentioning

confidence: 97%

“…; Yao et al . ). Several mycorrhizal types are present in these habitats (Gardes & Dahlberg ; Bjorbækmo et al .…”

Section: Introductionmentioning

confidence: 97%

Low host specificity of root‐associated fungi at an Arctic site

et al. 2014

Self Cite

View full text Add to dashboard Cite

In High Arctic ecosystems, plant growth and reproduction are limited by low soil moisture and nutrient availability, low soil and air temperatures, and a short growing season. Mycorrhizal associations facilitate plant nutrient acquisition and water uptake and may therefore be particularly ecologically important in nutrition-poor and dry environments, such as parts of the Arctic. Similarly, endophytic root associates are thought to play a protective role, increasing plants' stress tolerance, and likely have an important ecosystem function. Despite the importance of these root-associated fungi, little is known about their host specificity in the Arctic. We investigated the host specificity of root-associated fungi in the common, widely distributed arctic plant species Bistorta vivipara, Salix polaris and Dryas octopetala in the High Arctic archipelago Svalbard. High-throughput sequencing of the internal transcribed spacer 1 (ITS1) amplified from whole root systems generated no evidence of host specificity and no spatial autocorrelation within two 3 m × 3 m sample plots. The lack of spatial structure at small spatial scales indicates that Common Mycelial Networks (CMNs) are rare in marginal arctic environments. Moreover, no significant differences in fungal OTU richness were observed across the three plant species, although their root system characteristics (size, biomass) differed considerably. Reasons for lack of host specificity could be that association with generalist fungi may allow arctic plants to more rapidly and easily colonize newly available habitats, and it may be favourable to establish symbiotic relationships with fungi possessing different physiological attributes.

show abstract

“…Data from four previous studies of RAF communities on B. vivipara from mainland Norway and Svalbard (Blaalid et al, , ; Botnen et al, ; Yao et al, ) were combined with newly generated data. New B. vivipara samples were obtained from Iceland, Scotland, Jan Mayen and Austria (see Figure and Table for details), and prepared in a similar way to the previous studies.…”

Section: Methodsmentioning

confidence: 99%

Biogeography of plant root‐associated fungal communities in the North Atlantic region mirrors climatic variability

Botnen

Davey

Bjørnsgaard

et al. 2019

Journal of Biogeography

Self Cite

View full text Add to dashboard Cite

Aim Polar and alpine ecosystems appear to be particularly sensitive to increasing temperatures and the altered precipitation patterns linked to climate change. However, little is currently known about how these environmental drivers may affect edaphic organisms within these ecosystems. In this study, we examined communities of plant root‐associated fungi (RAF) over large biogeographical scales and along climatic gradients in the North Atlantic region in order to gain insights into the potential effects of climate variability on these communities. We also investigated whether selected fungal traits were associated with particular climates. Locations Austria, Scotland, Mainland Norway, Iceland, Jan Mayen and Svalbard. Taxa Root fungi associated with the ectomycorrhizal and herbaceous plant Bistorta vivipara. Methods DNA metabarcoding of the ITS1 region was used to characterize the RAF of 302 whole plant root systems, which were analysed by means of ordination methods and linear modelling. Fungal spore length, width, volume and shape, as well as mycelial exploration type (ET) of ectomycorrhizal (ECM) basidiomycetes were summarized at a community level. Results The RAF communities exhibited strong biogeographical structuring, and both compositional variation as well as fungal species richness correlated with annual temperature and precipitation. In accordance with general island biogeography theory, the least species‐rich RAF communities were found on Jan Mayen, a remote and small island in the North Atlantic Ocean. Fungal spores tended to be more elongated with increasing latitude. We also observed a climate effect on which mycelial ET was dominating among the ectomycorrhizal fungi. Main conclusions Both geographical and environmental variables were important for shaping root‐associated fungal communities at a North Atlantic scale, including the High Arctic. Fungal OTU richness followed general biogeographical patterns and decreased with decreasing size and/or increasing isolation of the host plant population. The probability of possessing more elongated spores increases with latitude, which may be explained by a selection for greater dispersal capacity among more isolated host plant populations in the Arctic.

show abstract

Substantial compositional turnover of fungal communities in an alpine ridge‐to‐snowbed gradient

Cited by 38 publications

References 71 publications

Different bacterial communities in ectomycorrhizae and surrounding soil

Different bacterial communities in ectomycorrhizae and surrounding soil

Low host specificity of root‐associated fungi at an Arctic site

Biogeography of plant root‐associated fungal communities in the North Atlantic region mirrors climatic variability

Contact Info

Product

Resources

About