ECOLOGICAL ROLES OF BASIDIOMYCETES FORMING DECAY COMMUNITIES IN ATTACHED OAK BRANCHES

Abstract

SummaryFrom sites in south‐west England attached oak (Quercus robur) branches bearing basidiomycete sporophores were cut down from mature trees, and the three‐dimensional structure of their decay communities analysed. Twelve basidiomycetes characterized the decay communities. These fungi varied in their ecology, particularly in relation to their ability to colonize living wood, and their interaction with each other and with animals. Phellinus ferreus, Stereum gausapatum and Vuilleminia comedens were pioneers actively growing in partially living branches and causing extensive white rot but little cambial loosening. Peniophora quercina behaved similarly but was often confined to the ends of branches. Exidia glandulosa appeared principally to cause cambial death and loosening leading to white rot in the wood. Phlebia rufa seemed to act as a pioneer causing white rot but only in obviously weakened branches. Coriolus versicoior and Phlebia radiata were secondary invaders only, readily replacing other fungi. Peniophora lycii and Stereum lursutum were each only obtained once. The roles of Hyphodertna setigerum and Schizopora paradoxa were less clear, but both were closely associated with insect activity.