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Arctic warming halves moist-tundra mycorrhizae
Open-top chamber warming cut moist tussock ECM OTU richness from 138 to 71, but dry tundra fungal communities showed no significant treatment effect.
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How did moist tussock ECM richness respond to OTC warming?
Total OTUs roughly halved: 71 in warmed plots vs 138 in controls.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
What was per-plot richness in moist tussock?
59 ± 21 OTUs in controls vs 20 ± 18 in treatment (P = 0.013).
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
Did dry tundra ECM communities shift with warming?
No significant correlation between composition and treatment (P = 0.4288).
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
Which four genera dominated ECM richness?
Tomentella, Cortinarius, Inocybe, and Russula (~82% of OTUs).
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
How was summer warming applied?
Hexagonal open-top chambers versus adjacent unaltered controls.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
How many ECM basidiomycete OTUs remained after QC?
343 OTUs (110,665 reads) from 20 genera.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
Were control-plot richness values similar between tundra types?
Not significantly different (P = 0.296), though dry plots were somewhat richer.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
Why analyze moist and dry tundra separately?
NMDS showed highly dissimilar assemblages, so warming effects were tested within type.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
What clustering threshold defined OTUs?
97% ITS sequence similarity, standard in fungal ecology.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified
Why do Arctic plants depend on these fungi?
Nutrient-poor soils make plants highly dependent on mycorrhizal mutualisms.
Source: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska · DOI · quote verified