MAILLARD, François; JUSINO, Michelle; ANDREWS, Erin; MORAN, Molly; VAZIRI, Grace; BANIK, Mark; FANIN, Nicolas; TRETTIN, Carl; LINDNER, Daniel; SCHILLING, Jonathan

doi:10.1016/j.funeco.2022.101151

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MAILLARD, François
University of Minnesota [Duluth] [UMD]

JUSINO, Michelle
USDA Forest Service Rocky Mountain Forest and Range Experiment Station
University of Florida [Gainesville] [UF]

ANDREWS, Erin
University of Minnesota [Morris] [UMM]

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Fungal Ecology. 2022-03-07, vol. 59, p. 101151

Elsevier

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We incubated 196 large-diameter aspen (Populus tremuloides), birch (Betula papyrifera), and pine (Pinus taeda) logs on the FACE Wood Decomposition Experiment encompassing eight climatically-distinct forest sites in the United States. We sampled dead wood from these large-diameter logs after 2 to 6 y of decomposition and determined wood rot type as a continuous variable using the lignin loss/density loss ratio (L/D) and assessed wood-rotting fungal guilds using high-throughput amplicon sequencing (HTAS) of the ITS-2 marker. We found L/ D values in line with a white rot dominance in all three tree species, with pine having lower L/D values than aspen and birch. Based on HTAS data, white rot fungi were the most abundant and diverse wood-rotting fungal guild, and soft rot fungi were more abundant and diverse than brown rot fungi in logs with low L/D values. For aspen and birch logs, decay type was related to the wood density at sampling. For the pine logs, decay type was associated with the balance between white and brown/soft rot fungi abundance and OTU richness. Our results demonstrate that decay type is governed by biotic and abiotic factors, which vary by tree species.< Réduire

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Wood rot fungi

Decay type

Soft rot

White rot

FACE

HTAS

Metabarcoding

Brown rot

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Wood-decay type and fungal guild dominance across a North American log transplant experiment

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