LAUSR

Abstract The relative abundance of ectomycorrhizal (ECM) roots in pure and mixed stand compositions of Dryas octopetala, Salix repens and Arctostaphylos uva-ursi grown in Scottish coastal arctic/alpine relict habitat was described through ECM morphotyping and comparisons of fungal internal transcribed spacer sequences. Neither specific ECM morphotypes nor the morphotype communities were found in association with any stand compositions. The proportions of the ECM roots on S. repens, however, were significantly less in pure stand and were further decreased in mixed with A. uva-ursi. Possible factors contributing the reduction, including the effects by other host species grown in proximity, are discussed.