Seasonal Changes in the Photosynthetic Activity of Terrestrial Lichens and Mosses in the Lichen Scots Pine Forest Habitat

Photosynthetic activity is one of the most important metabolic processes that can be quickly and easily studied in field. It used for identifying environmental factors affecting ecosystem balance, as any stressor influencing physiological will have a measurable effect on photosynthesis. The aim this study was to measure photosynthetic selected lichens mosses investigate its changes resulted from diurnal seasonal variability. We two (Cladonia mitis Sandst Cladonia uncialis (L.) Weber ex F.H. Wigg.) (Pleurozium schreberi (Willd. Brid.) Mitt. Dicranum scoparium Hedw.). Samples were collected area lichen Scots pine forest “Bory Tucholskie” National Park. Our revealed cryptogams depended species, season, time day, water availability. which are main component forests, higher than Pleurozium schreberi, represents species fresh coniferous forests. increased spring through summer reached highest values autumn. also soaked samples morning afternoon compared noon. Despite access, noon still showed lowest activity. This result natural humidity during day well-adapted.