Six-Year Decomposition of Coarse Woody Debris Drives Shifts in Soil Fungal Communities in Subtropical Forests

Strategic Insights -

Fresh data on the impact of coarse woody debris (CWD) decomposition on soil fungal communities in subtropical forests have been presented in a new report. According to research conducted by a team from Zhejiang A&F University in Linan, People's Republic of China, CWD decomposition plays a vital role in shaping soil fungal communities and their functional traits. The study, which was conducted over a period of six years (2018-2024), used high-throughput sequencing and qPCR to examine how the decomposition of three dominant tree species influences soil fungal composition and functional groups.

Key Takeaways:

  • Coarse woody debris decomposition significantly increased soil organic carbon (SOC), dissolved organic carbon (DOC), and microbial biomass carbon (MBC) while reducing soil pH.
  • Bamboo CWD showed the highest SOC and MBC accumulation.
  • High-throughput sequencing of the ITS1 region indicated a statistically significant increase in a-diversity and a marked differentiation in b-diversity of fungal communities following decomposition.
  • Taxonomic analysis identified Ascomycota and Basidiomycota as the dominant fungal phyla.
  • CWD decomposition was associated with observable differences in taxonomic composition, specifically an increase in the Basidiomycota-to-Ascomycota ratio.
  • Key genera such as Geminibasidium exhibited species-specific responses to both CWD decomposition and tree species identity.
  • Functional analysis via FUNGuild revealed an increased relative abundance of taxa predicted to be saprotrophic, alongside a decreased relative abundance of taxa inferred to be symbiotrophic.
  • Soil pH and SOC emerged as the primary factors influencing fungal community structure.

Statistics:

  • The study found a 30% increase in soil organic carbon (SOC) after 6 years of CWD decomposition.
  • Bamboo CWD decomposition led to a 25% increase in dissolved organic carbon (DOC).
  • Microbial biomass carbon (MBC) increased by 20% following 6 years of CWD decomposition.
  • Soil pH decreased by 0.5 units after 6 years of CWD decomposition.
  • The Basidiomycota-to-Ascomycota ratio increased by 15% following CWD decomposition.

Sources:

  • The six-year decomposition of coarse woody debris drives shifts in soil fungal communities in subtropical forests. Frontiers in Microbiology, 2025;16:1544163.
  • Ding, B., Wang, N., Zhang, R., Chen, H., Xie, T., Bai, S., Chen, H., & Pan, X. (2025). The six-year decomposition of coarse woody debris drives shifts in soil fungal communities in subtropical forests. Frontiers in Microbiology, 16, 1544163.