Journal
FUNGAL ECOLOGY
Volume 23, Issue -, Pages 48-57Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2016.05.011
Keywords
Ascomycetes; Basidiomycetes; Community; Diversity; DNA barcoding; Nitrogen deposition; Soil fungi
Funding
- NSF Long-term Ecological Research (LTER) Program
- NSF Ecosystem Studies grant [DEB-1021063]
- NSF LTER program
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Fungi dominate the microbial biomass of temperate forest soils and are a key driver of ecosystem nutrient cycling. Chronic nitrogen (N) amendments frequently cause the accumulation of soil organic matter within soils, suggesting that elevated N disrupts decomposition by altering fungal communities: To link previously observed increases in soil organic matter with potential changes in the fungal community, we assessed the effects of soil N amendment on fungal community structure at a long-term N addition experiment at Harvard Forest (Petersham, MA, USA). A decline in the relative abundance of ectomycorrhizal fungi following long-term N addition was offset by an increase in the relative abundance of saprotrophs. Species richness and diversity of ectomycorrhizal fungi declined, while ascomycetes and saprotrophs responded positively to N enrichment. However, nitrophilic species included ectomycorrhizal as well as saprotrophic fungi, especially the ectomycorrhizal Russula vinacea, whose relative abundance increased from 10 to 37% of the entire community across N treatments. Two decades of soil N enrichment appears to have fundamentally altered the soil fungal community of this temperate forest. (C) 2016 Elsevier Ltd and British Mycological Society. All rights reserved.
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