Arbuscular Mycorrhizal Fungi May Mitigate the Influence of a Joint Rise of Temperature and Atmospheric CO2 on Soil Respiration in Grasslands. (6th December 2009)

• Record Type: Journal Article
• Authors: Vicca, S.; Zavalloni, C.; Fu, Y. S. H.; Voets, L.; Dupré de Boulois, Hervé; Declerck, S.; Ceulemans, R.; Nijs, I.; Janssens, I. A.
• Other Names: van Veen Johannes Academic Editor.
• Is Part Of: International journal of ecology. Volume 2009(2009)
• Publication Date: 2009-12-06
• Subjects: Ecology -- Periodicals; Ecology; Periodicals; 577
• DOI: 10.1155/2009/209768
• Languages: English
• ISSNs: 1687-9708

Abstract

Abstract : We investigated the effects of mycorrhizal colonization and future climate on roots and soil respiration (R soil ) in model grassland ecosystems. We exposed artificial grassland communities on pasteurized soil (no living arbuscular mycorrhizal fungi (AMF) present) and on pasteurized soil subsequently inoculated with AMF to ambient conditions and to a combination of elevatedCO 2 and temperature (future climate scenario). After one growing season, the inoculated soil revealed a positive climate effect on AMF root colonization and this elicited a significant AMF x climate scenario interaction on root biomass. Whereas the future climate scenario tended to increase root biomass in the noninoculated soil, the inoculated soil revealed a 30% reduction of root biomass under warming at elevatedCO 2 (albeit not significant). This resulted in a diminished response ofR soil to simulated climatic change, suggesting that AMF may contribute to an attenuated stimulation ofR soil in a warmer, highCO 2 world.