Soil fungi and their role in carbon sequestration in forest ecosystems.

Soil fungi play a vital role in carbon sequestration in forest ecosystems. These microorganisms are key drivers of the carbon cycle, contributing to carbon storage and stability through various mechanisms.

How Soil Fungi Contribute to Carbon Sequestration:

• Decomposition and Carbon Storage: Fungi decompose organic matter, converting carbon into stable forms that can remain in the soil for long periods.
• Mycorrhizal Associations: Mycorrhizal fungi form symbiotic relationships with plant roots, enhancing plant growth and carbon sequestration by facilitating nutrient exchange.
• Soil Structure Improvement: Fungal networks improve soil aeration, water retention, and aggregation, promoting a healthier environment for carbon storage.

Types of Fungi and Their Roles:

• Saprophytic Fungi: Decompose organic matter, releasing carbon into the soil.
• Symbiotic Fungi (Mycorrhizae): Form relationships with plant roots, enhancing nutrient and water absorption.
• Ectomycorrhizal Fungi (ECM): Associated with higher soil carbon storage due to enhanced microbial carbon use efficiency.
• Arbuscular Mycorrhizal Fungi (AMF): Contribute to soil carbon sequestration through extensive hyphal networks ¹ ² ³.

Forest Ecosystems and Fungal Diversity:

• Boreal Forests: Higher fungal diversity and species richness, with Basidiomycota dominating fungal communities.
• Temperate Forests: ECM trees exhibit higher carbon storage due to enhanced microbial carbon use efficiency.
• Tropical Forests: Symbiotic fungi, especially endomycorrhizal, dominate soil fungal communities ² ⁴.

By understanding the role of soil fungi in carbon sequestration, we can develop strategies to promote their growth and enhance carbon storage capacity in forest ecosystems, ultimately contributing to climate change mitigation ¹.