Journal
FUNGAL ECOLOGY
Volume 26, Issue -, Pages 11-19Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2016.11.001
Keywords
Free-air-CO2-enrichment (FACE); Minirhizotron; Lifespan; Ectomycorrhizal fungi; Phenology; Melanin; Global change; Forest ecosystem; Ascomycetes; Soil ecology
Funding
- Office of Science (BER), U.S. Department of Energy [DE-FG02-95ER62083]
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Ectomycorrhizal fungi are important in many forest ecosystems, yet their production dynamics and responses to environmental changes are poorly understood. Cenococcum geophilum is a common ectomycorrhizal fungus important to plant and forest soil biogeochemical cycles. The seasonal and inter annual patterns of production and persistence of mycorrhizas formed by C geophilum in a pine forest exposed to elevated atmospheric CO2 and nitrogen fertilization were monitored using a 12 y minirhizotron dataset. Production of C geophilum mycorrhizas was distinctly seasonal and peaked in late summer/autumn. Elevated CO2 generally increased production while nitrogen fertilization strongly decreased production. Persistence times of C geophilum mycorrhizas was ca. 2.7 y and was unaffected by CO2 and nitrogen addition. Total production was greater in shallow soil (0-16 cm) but persistence was longer in deeper soil (17-32 cm). These observations provide insights into the autecology of C geophilum and suggest that its tissues may be slow to decompose compared to other ectomycorrhizal species. (C) 2016 Elsevier Ltd and British Mycological Society. All rights reserved.
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