fungi

Fungal Ecology Overview

Importance of Fungi

• Roles in Ecosystems:

  • Ecosystem service providers

  • Decomposers

  • Mycorrhizal associations

  • Disease causative agents

  • Food sources

  • Components in lichens

  • Invasive species control

  • Endophyte interactions

Essential Questions in Fungal Ecology

• Species presence and diversity

• Environmental roles of fungi

• Impact of environmental changes on fungi

• Interactions between fungi and other organisms

Fungal Interactions

• Diversity in Soil: A teaspoon of Amazon soil may contain 1,800 life forms, including 400 fungi.

• Types of Interactions:

  • Fungal-fungal (e.g. lichens, endophytes)

  • Fungal-invertebrate (e.g. food sources)

  • Climate change effects

Fungi as Decomposers

• Key roles in nutrient cycling and ecosystem stabilization.

Lichens

• Definition: Symbiosis between fungus (usually ascomycete) and an alga/cyanobacterium.

• Diversity: ~13,500 identified lichenized fungi (mainly Ascomycota).

• Forms: Crustose, fruticose, foliose.

• Ecological Role: Bioindicators of environmental health.

Endophytes

• Fungi residing in plant tissues, influencing host plant fitness and diversity.

Invasive Species and Fungal Pathogens

• Invasive plants often have fewer associated fungi.

• Case Study: White-nose syndrome in bats caused by Pseudogymnoascus destructans.

Fungal Habitats

• Diverse environments: Aquatic, extreme environments (deserts, deep-sea, polar).

Climate Change Impacts

• Observed shifts in fungal fruiting patterns.

• Potential increases in species richness in certain regions.

Conservation and Research Perspectives

• Majority of fungi remain undescribed (~3 million species).

• Threats include habitat loss, climate change, invasive species.

• Importance of protecting fungal diversity for ecosystem services.

Summary

• Fungi play critical roles in ecosystems, impacting biodiversity and health. Understanding their functions is vital for conservation efforts and climate change management.