The functional structure of ectomycorrhizal communities in an oak forest in central France witnesses ancient Gallo-Roman farming practices |
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Authors: | Abdala G Diedhiou Jean-Luc Dupouey Etienne Dambrine Jean Garbaye |
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Institution: | a UMR 1136 INRA-Nancy Université, Interactions Arbres/Microorganisms, INRA-Nancy, 54280 Champenoux, France b Laboratoire Commun de Microbiologie, IRD/UCAD/ISRA, BP 1386 Bel-Air, Dakar, Senegal c UMR 1137 INRA-Nancy Université, Ecologie et Ecophysiologie Forestières, INRA-Nancy, 54280 Champenoux, France d UR 1138 Biogéochimie des Ecosystèmes Forestiers, INRA-Nancy, 54280 Champenoux, France e Université de Paris 1-Panthéon-Sorbonne, UFR 03, Institut d'Art et d'Archéologie, 3 rue Michelet, 75006 Paris, France |
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Abstract: | The activities of nutrient-mobilising enzymes secreted by ectomycorrhizas of sessile oak (Quercus petraea) have been measured in 24 plots in a forested area in central France where many rural Gallo-Roman settlements (first to fifth centuries AD) have been discovered. Data have been related with tree growth and soil chemical properties. Although soil near the past settlements is still enriched in N and P, this does not always correspond to the higher productivity of oak trees. However, when this is the case, the ectomycorrhizal community displays higher chitinase, protease and phosphatase activities (involved in N and P mobilisation from soil organic matter). A few specialised ectomycorrhizal fungal species are responsible for this adaptation to the long-lasting modification of soil conditions. |
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Keywords: | Quercus petraea Forest site fertility Ectomycorrhiza Fungal community Enzymatic activity Past land use Roman Empire Gallo-Roman agriculture |
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