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Agar-Block Microcosms for Controlled Plant Tissue Decomposition by Aerobic Fungi

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Microbial Life History Mediates the Drought-Induced Decrease in Wood Decomposition in Subtropical Forests.

Shuxian Jia^1,2,3, Xuhui Zhou^1,4, Yuling Fu¹

¹Tiantong National Station for Forest Ecosystem Research, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China.

Ecology Letters

|May 23, 2025

Summary

This summary is machine-generated.

Drought reduces wood decomposition by altering fungal communities and wood traits. Fungal K/r-strategies, not bacterial ones, correlated with decomposition rates, indicating fungi

Keywords:

carbon cycling deadwood decomposition drought microbial strategy wood traits

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Area of Science:

Forest Ecology
Biogeochemistry
Microbial Ecology

Background:

Wood decomposition is vital for forest carbon cycling.
Drought impacts microbial communities and wood decomposition processes.
Understanding microbial strategies, wood traits, and microclimate interactions under drought is crucial.

Purpose of the Study:

To investigate how drought affects wood decomposition rates.
To determine the roles of microbial strategies (fungal K/r-strategies) and wood traits in regulating decomposition under drought.
To compare the drought sensitivity of fungal and bacterial communities in wood decomposition.

Main Methods:

A throughfall exclusion experiment simulating drought (35% and 70% rainfall reduction).
Analysis of wood decomposition rates (CO2 efflux) across 12 tree species.
Assessment of fungal and bacterial community composition (Basidiomycota, Ascomycota) and fungal K/r-strategies.

Main Results:

Drought significantly reduced wood CO2 efflux rates.
Wood traits (density, carbon reduction) and fungal K/r-strategies were primary drivers of reduced decomposition.
Higher abundance of Basidiomycota and lower Ascomycota correlated with faster decomposition.
Fungal K/r-strategies positively correlated with wood CO2 efflux under all drought levels, while bacterial strategies did not.

Conclusions:

Fungi exhibit greater drought sensitivity than bacteria in wood decomposition.
Shifts in fungal communities and wood traits are key regulators of decomposition under drought.
Findings improve predictions of forest carbon cycling and climate-biosphere feedbacks.