beard lichen on bark of dying tree, vegetation in australia

abstract alga algae algal association attached australia australian australis bark beard biosphere branch composite covered crusty cryptobiosis cyanobacterium detail ecosystem environment eucalyptus filaments fungi fungus grey grow growing growth hair hairy hang hanging interwoven layers lichen lichens minishrub moss mutualism mycobiont natural nature occupy organism organisms parmeliaceae photobiont photosynthesis photosynthesizing photosynthetic physciaceae plant shrublike shrubby structure structures surface symbiosis symbiotic texture tree tropics trunk usnea variety wood woodland woods twigs tangled bole treemoss vertical fruticose dying vegetation close-up