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Effects of elevated atmospheric CO2 on fungal competition and decomposition of Fraxinus excelsior litter in laboratory microcosms

Published online by Cambridge University Press:  01 February 2000

David R. CONWAY ,
Juliet C. FRANKLAND ,
Venetia A. SAUNDERS  and
David R. WILSON
David R. CONWAY
Affiliation:
Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU, UK School of Biomolecular Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK
Juliet C. FRANKLAND
Affiliation:
Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU, UK
Venetia A. SAUNDERS
Affiliation:
School of Biomolecular Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK
David R. WILSON
Affiliation:
Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU, UK
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Abstract

Evidence that chemical changes in litter exposed to elevated CO2 might alter the composition and function of fungal communities in soil is presented. Some potential effects of elevated atmospheric CO2 on the decomposition of Fraxinus excelsior leaf litter and the interactions of the colonizing fungi, growing singly or in simple associations in microcosms, were investigated. Fungal colonization was monitored by analysis of the ergosterol content of litter and specific PCR-amplified ribosomal DNA spacer products. After < 42 d, fungal colonization was less on litter with a higher C[ratio ]N ratio when obtained from seedlings grown in elevated CO2 (600 ppm). After triple-species inoculation percentage α-cellulose and, in some combinations, nitrogen content was reduced on litter from seedlings grown in elevated CO2.

Type
Research Article
Information
Mycological Research , Volume 104 , Issue 2 , February 2000 , pp. 187 - 197
Copyright
© The British Mycological Society 2000

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