Elevated Atmospheric CO2 Affects Ectomycorrhizal Species Abundance and Increases Sporocarp Production under Field Conditions

Forests

Douglas L. Godbold²  Martina Vašutová³  Anna Wilkinson¹  Magda Edwards-Jonášová³  Michael Bambrick⁴  Andrew R. Smith⁴  Marian Pavelka³  Pavel Cudlin³ 

[1] Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK; E-Mail:;Institute of Forest Ecology, Universität für Bodenkultur (BOKU), 1190 Vienna, Austria;Global Change Research Centre, Academy of Sciences of the Czech Republic, Department of Landscape Carbon Deposition, Na Sádkách 7, České Budějovice 370 05, Czech Republic; E-Mails:;School of Environment, Natural Resources and Geography, Bangor University, LL57 2UW Gwynedd, UK; E-Mails:

关键词: FACE;    community structure;    root tips;    forest;    hyphae;    rhizomorph;    morphotype;    internal transcribed spacer (ITS);    sequence;   

DOI  :  10.3390/f6041256

来源: mdpi

【 摘 要 】

Anthropogenic activities during the last century have increased levels of atmospheric CO₂. Forest net primary productivity increases in response to elevated CO₂, altering the quantity and quality of carbon supplied to the rhizosphere. Ectomycorrhizal fungi form obligate symbiotic associations with the fine roots of trees that mediate improved scavenging for nutrients in exchange for a carbohydrate supply. Understanding how the community structure of ectomycorrhizal fungi is altered by climate change is important to further our understanding of ecosystem function. Betula pendula and Fagus sylvatica were grown in an elevated CO₂ atmosphere delivered using free air carbon dioxide enrichment (FACE) under field conditions in the U.K., and Picea abies was grown under elevated CO₂ in glass domes in the Czech Republic. We used morphotyping and sequencing of the internal transcribed spacer region of the fungal ribosomal operon to study ectomycorrhizal community structure. Under FACE, un-colonised roots tips increased in abundance for Fagus sylvatica, and during 2006, sporocarp biomass of Peziza badia significantly increased. In domes, ectomycorrhizal community composition shifted from short-distance and smooth medium-distance to contact exploration types. Supply and competition for carbon belowground can influence ectomycorrhizal community structure with the potential to alter ecosystem function.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.