Complex relationship between soil fungi and conservation value assessments in boreal forests

Area of Science:

• Ecology
• Mycology
• Conservation Biology

Background:

• Industrial forestry impacts biodiversity and forest ecosystems.
• Forest reserves are crucial for biodiversity conservation.
• Current conservation assessments rely on aboveground habitat proxies, assuming they represent overall biodiversity.

Purpose of the Study:

• To evaluate if common conservation value assessments, based on aboveground habitat heterogeneity, reflect soil fungal diversity and community composition.
• To compare the effectiveness of these assessments across northern and southern Swedish forests.
• To identify key environmental factors influencing soil fungal communities.

Main Methods:

• Assessed conservation value based on aboveground habitat characteristics in Swedish forests.
• Quantified abundance, richness, and community composition of 12 soil fungal groups.
• Correlated conservation value with fungal data and analyzed the influence of soil fertility and other environmental parameters.

Main Results:

• Conservation value accurately reflected deadwood-associated fungi but poorly represented most soil-dwelling fungal guilds.
• Associations between conservation value and fungal diversity varied regionally; positive in the south, absent in the north.
• Soil fertility was the strongest predictor of fungal community composition across all guilds, with differing responses between saprotrophic and root-associated fungi.

Conclusions:

• Existing conservation assessment methods capture only limited aspects of soil fungal diversity.
• The efficacy of these methods in predicting fungal diversity is region-dependent.
• Incorporating soil parameters like fertility is essential for comprehensive soil fungal conservation strategies.