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• White willow riparian forests along the upper Tisza River, Hungary

  78–100

  Balázs Kevey

  Csilla Barna

  Views:

  134

  Forests of the Tisza floodplain in the northwestern part of Hungary include white willow riparian forests (Leucojo aestivi-Salicetum albae) that are phytosociologically little studied. This study summarizes the characteristics of this community based on 25 phytosociological relevés. These forests grow mostly on mud and raw alluvial soil in the low-lying parts of the lower terraces of the floodplain. They are easily separated by their species composition and underdeveloped shrub layer from white poplar gallery forests (Senecioni sarracenici-Populetum albae)., which grow on higher lying ground with rather light sandy soil and typically possess a pronounced shrub layer. The understory of their stands may often host plants  that are rare or completely absent in other parts of the country, such as Cardamine amara, Cardamine flexuosa, Cardaminopsis arenosa, Carex pseudocyperus, Carex remota, Chrysosplenium alternifolium, Leucanthemella serotina, Leucojum aestivum, Oenanthe banatica, Scrophularia scopolii, Telekia speciosa, Vitis sylvestris. This community is classified in the „Salicenion albae-fragilis Kevey 2008” suballiance.

• Botanical comparison of man-made landforms in the Nagykunság and Nagy-Sárrét regions (E Hungary)

  65-76

  Szabolcs Kis

  Views:

  213

  Loess grasslands are among the most important vegetation types of the Great Hungarian Plain. This paper compares the composition of vegetation situated on three types of man-made landforms (burial mounds, Devil’s dykes and river dikes) which were built in different historical times. I studied the similarities and differences in their vegetation, focusing on the rare species and plant associations. I studied six burial mounds, two Devil’s dykes and four river dikes. All of the studied landforms were covered by loess steppes, loess cliffs or Artemisia salt steppes. Devil’s dykes had the most valuable vegetation and they preserve a very diverse flora in the landscape.

• Dry oak woods on the Szentendre Island

  147-178

  Balázs Kevey

  Éva Irén Bőhm

  Views:

  162

  The phytosociological characteristics of the oak woods on the Szentendre Island were first studied 70 years ago. We conducted a follow-up study to determine the phytosociological relationships of theses woods and assess their possible changes over time. We found that these woods are most similar in their phytosociological characteristics to the closed pedunculate oak forests occurring in the high floodplain in the Szigetköz area (Melico nutantis-Quercetum roboris) along the Danube. Our results also showed a marked increase in the proportion of natural weeds, introduced species and invasive aliens in the studied woods.