Impacts of nitrogen deposition on forest mycorrhizal communities

Lilleskov, Erik A.; Kuyper, Thomas W.; Bidartondo, Martin I.; Hobbie, Erik A.

doi:10.1016/b978-0-323-91140-5.00001-4

Atmospheric Nitrogen Deposition to Global Forests 2024

DOI: 10.1016/b978-0-323-91140-5.00001-4

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Impacts of nitrogen deposition on forest mycorrhizal communities

Erik A. Lilleskov,

Thomas W. Kuyper,

Martin I. Bidartondo

et al.

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Peatland Fungal Community Responses to Nutrient Enrichment: A Story Beyond Nitrogen

Wang,

Lamit,

Lilleskov

et al. 2024

Global Change Biology

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Anthropogenically elevated inputs of nitrogen (N), phosphorus (P), and potassium (K) can affect the carbon (C) budget of nutrient‐poor peatlands. Fungi are intimately tied to peatland C budgets due to their roles in organic matter decomposition and symbioses with primary producers; however, the influence of fertilization on peatland fungal composition and diversity remains unclear. Here, we examined the effect of fertilization over 10 years on fungal diversity, composition, and functional guilds along an acrotelm (10–20 cm), mesotelm (30–40 cm), and catotelm (60–70 cm) depth gradient at the Mer Bleue bog, Canada. Simultaneous N and PK additions decreased the relative abundance of ericoid mycorrhizal fungi and increased ectomycorrhizal fungi and lignocellulose‐degrading fungi. Fertilization effects were not more pronounced in the acrotelm relative to the catotelm, nor was there a shift toward nitrophilic taxa after N addition. The direct effect of fertilization significantly decreased the abundance of Sphagnum‐associated fungi, primarily owing to the overarching role of limiting nutrients rather than a decline in Sphagnum cover. Increased nutrient loading may threaten peatland C stocks if lignocellulose‐degrading fungi become abundant and accelerate decomposition of recalcitrant organic matter. Additionally, future changes in plant communities, strong water table fluctuations, and peat subsidence after long‐term nutrient loading may also influence fungal functional guilds and depth‐dependencies of fungal community structure.

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Peatland Fungal Community Responses to Nutrient Enrichment: A Story Beyond Nitrogen

Wang,

Lamit,

Lilleskov

et al. 2024

Global Change Biology

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Impacts of nitrogen deposition on forest mycorrhizal communities

Cited by 1 publication

References 174 publications

Peatland Fungal Community Responses to Nutrient Enrichment: A Story Beyond Nitrogen

Peatland Fungal Community Responses to Nutrient Enrichment: A Story Beyond Nitrogen

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