Importance of spruce swamp‐forests for epiphyte diversity and flora on Picea abies in southern and middle boreal Finland

摘要: The epiphyte (lichens and bryophytes) species richness, diversity composition on basal trunks of Picea abies in spruce swamp-forests were compared to adjacent mesic forests mineral soil two southern middle boreal sites old-growth forest patches Finland. sampling was carried out along four line transects parallel swamp-forest margin: 1) the swamp-forest, 2) at margin, 3) c. 10-20 m off margin 4) least 50 margin. In there a decreasing trend average number per tree from trees (21-25 species) (17-18 species), whereas more humid virgin similar not detected (25-28 all trees). There no major differences flora between locations or study sites; dominant occurred nearly sample trees. crustose lichens Cliostomum leprosum, Arthonia leucopellaea Lecanactis abietina most common that mainly confined sites, C. leprosum also sites. addition, several rare exclusively extended significantly higher than proved be one important habitats for maintaining landscape.