Relict occurrences of boreal brown-moss quaking rich fens in the Carpathians and adjacent territories

摘要: Quaking rich fens dominated by boreal semi-aquatic brown-mosses such as Scorpidium scorpioides and Calliergon trifarium are extremely rare in the Carpathians. These harbour endangered species persisting at few localities region. However, their phytosociological classification has not been sufficiently solved yet, because they lack Sphagnum well calcicole characteristic for Caricion davallianae alliance. A recent pan-European synthesis on fen vegetation suggests that these belong to Stygio-Caricion limosae alliance (boreal vegetation). The isolated occurrence of this southward zone outside Alps is rather exceptional might represent a relict from an early post-glacial period. In study, we compared data between Northern Europe Carpathians plus adjacent regions (the Bohemian Massif, Dinaric Alps) using NMDS cluster analysis. We found composition brown-moss quaking Central Southeastern corresponds with Europe, confirming assignment limosae. further reconstructed potential past distribution Czech Republic Slovakia available floristic macrofossil data. Macrofossil suggest type had much more common today it persists only ancient fens, showing long-term stability environmental conditions. main causes its present-day rarity Middle-Holocene woodland phases water table decreases caused anthropogenic deterioration regime landscape.