BACKGROUND AND AIMS Natural regeneration of white spruce (Picea glauca) after disturbance has been reported to be very poor. Here a study was made to determine whether C compounds released from understorey species growing together with white spruce could be involved in this regeneration failure, either by (1) changing soil nutrient dynamics, (2) inhibiting germination, and/or (3) delaying seedl...

Forest fire risk in Finland is estimated with the Finnish Fire Index (FFI), which predicts fuel moisture content (FMC) of forest floor. We studied FMC variation four typical ground vegetation fuels, Pleurozium schreberi, Hylocomium splendens, Dicranum spp., and Cladonia raw humus mature recently clear-cut stands. Of these, six were sub-xeric Pinus sylvestris stands, mesic Picea abies analysed a...

Polycyclic aromatic hydrocarbons (PAHs), as the main components of petroleum (PHCs), are carcinogenic organic pollutants that occur widely in atmospheric environment with increasing concentration. Moreover, PAHs widespread all over world due to their high volatility and long-range transport potential. The monitoring is often limited by working conditions, especially around oil field operation a...

Whereas many reports now exist on flavonoids of liverworts only few publications are concerned with the flavonoid pattern of mosses [1—5]. The detection of an apigenin 7-O-rhamnoglucoside from H yloco­ mium splendens was reported [6]. Screening chroma­ tograms of samples of H. splendens collected at about 20 different localities showed however a much richer flavonoid pattern as supposed previou...

Bryophytes are a dominant and functionally important component of the forest floor vegetation in boreal forests, yet little is known about the fungal diversity associated with these abundant plants. Using molecular identification, we document an ecologically and phylogenetically diverse array of fungi associated with the living parts of three widespread and abundant boreal forest bryophytes, i....