Fungal-mediated soil aggregation as a mechanism for carbon stabilization

Area of Science:

• Soil science
• Mycology
• Ecology

Background:

• Soils can act as carbon sinks, mitigating greenhouse gas emissions.
• Soil organic carbon is protected from decomposition by being occluded within soil aggregates.
• Filamentous fungi are vital for forming and stabilizing these soil aggregates.

Purpose of the Study:

• To review current knowledge on fungal contributions to soil aggregation.
• To identify knowledge gaps and propose a research agenda for quantifying fungal-mediated aggregation.
• To explore how fungal diversity impacts soil structure and carbon cycling.

Main Methods:

• Literature review of existing research on fungi and soil aggregation.
• Identification of knowledge gaps in quantitative data and mechanistic understanding.
• Proposal of experimental approaches, including trait-based and diversity manipulation studies.

Main Results:

• Significant knowledge gaps exist in understanding aggregate turnover, fungal mechanisms in aggregation, and fungal roles across environments.
• A trait-based approach is promising for linking fungal diversity to soil structure.
• Experimental manipulation of fungal diversity is necessary.

Conclusions:

• Filamentous fungi are key drivers of soil aggregation and carbon sequestration.
• Further research integrating ecological and physicochemical perspectives is crucial for accurate soil carbon modeling.
• Understanding fungal roles is essential for developing effective land management strategies for climate change mitigation.