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Variation in hyphal production rather than turnover regulates standing fungal biomass in temperate hardwood forests

Cheeke, Tanya and Phillips, Richard P. and Kuhn, Alexander and Rosling, Anna and Fransson, Petra (2021). Variation in hyphal production rather than turnover regulates standing fungal biomass in temperate hardwood forests. Ecology. 102 , e03260
[Research article]

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Abstract

Soil fungi link above‐ and belowground carbon (C) fluxes through their interactions with plants and contribute to C and nutrient dynamics through the production, turnover, and activity of fungal hyphae. Despite their importance to ecosystem processes, estimates of hyphal production and turnover rates are relatively uncommon, especially in temperate hardwood forests. We sequentially harvested hyphal ingrowth bags to quantify the rates of Dikarya (Ascomycota and Basidiomycota) hyphal production and turnover in three hardwood forests in the Midwestern United States, where plots differed in their abundance of arbuscular (AM)‐ vs. ectomycorrhizal (ECM)‐associated trees. Hyphal production rates increased linearly with the percentage of ECM trees and annual production rates were 66% higher in ECM‐ than AM‐dominated plots. Hyphal turnover rates did not differ across the mycorrhizal gradient (plots varying in their abundance of AM vs. ECM trees), suggesting that the greater fungal biomass in ECM‐dominated plots relates to greater fungal production rather than slower fungal turnover. Differences in hyphal production across the gradient aligned with distinctly different fungal communities and activities. As ECM trees increased in dominance, fungi inside ingrowth bags produced more extracellular enzymes involved in degrading nitrogen (N)‐bearing relative to C‐bearing compounds, suggesting greater fungal (and possibly plant) N demand in ECM‐dominated soils. Collectively, our results demonstrate that shifts in temperate tree species composition that result in changes in the dominant type of mycorrhizal association may have strong impacts on Dikarya hyphal production, fungal community composition and extracellular enzyme activity, with important consequences for soil C and N cycling.

Authors/Creators:Cheeke, Tanya and Phillips, Richard P. and Kuhn, Alexander and Rosling, Anna and Fransson, Petra
Title:Variation in hyphal production rather than turnover regulates standing fungal biomass in temperate hardwood forests
Series Name/Journal:Ecology
Year of publishing :2021
Volume:102
Article number:e03260
Number of Pages:17
ISSN:0012-9658
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Dikarya fungal biomass, ergosterol, hyphal ingrowth bags, hyphal production, hyphal turnover, mycelium, mycorrhizal type, temperate forest
URN:NBN:urn:nbn:se:slu:epsilon-p-109823
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109823
Additional ID:
Type of IDID
DOI10.1002/ecy.3260
Web of Science (WoS)000613306700001
ID Code:25525
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:28 Sep 2021 04:25
Metadata Last Modified:28 Sep 2021 05:01

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