Search

Search Results

• Floristic and vegetation change on the Sphagnum-dominated mire of Egerbakta

  129–138

  János György Nagy

  János András Dudás

  Dániel Töpler

  Júlia Hoblyák

  Views:

  92

  Since 1988, open stands of Menyanthes trifoliata have disappeared, communities of Carex rostrata have declined, and the Sphagnum-dominated willow carr has expanded. The mire’s central asso­ciations include Caricetum rostratae, Salici cinereae–Sphagnetum recurvi sphagnetosum squar­rosi, and Calamagrosti–Salicetum cinereae. In the mainly nudum lagg zone, the following communities occur: Biden­ti–Polygonetum hydropiperis, Bidenti–Polygonetum hydropiperis urticetosum dioicae, Cari­cetum acutifor­mis, Juncetum effusi, Glycerietum maximae, and a community dominated by Poa nemora­lis. We recorded 77 vascular plant species, 62 of which were new to the site. Rare species have declined in number: Menyant­hes trifoliata and Cicuta virosa are now absent, and of the former eight Sphagnum species, only Sphagnum squarrosum remains. The original Salici cinereae–Sphagnetum recurvi sphagne­tosum recurvi subassociati­on transitioned into Salici cinereae–Sphagnetum recurvi sphagnetosum squar­rosi after the mire remained completely dry and peat-moss-free for several years around 2000. Central communities reflect a cool, moderately acidic, oligotrophic environment with low pH and conductivity. In contrast, lagg vegetation indicates warmer, nutrient-rich, less acidic conditions. The mire’s most valuable zone is its central, Sphag­num-rich area, whose preservation depends on a natural water supply maintained by continuous forest cover in the catchment and stable or reduced large game populations.