Search
Search Results
-
White willow riparian forests along the upper Tisza River, Hungary
78–100Views:111Forests 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.
-
Black poplar riparian forests (Carduo crispi-Populetum nigrae) along the river Drava
215–238Views:167The objective of this study is to analyse the phytosociological characteristics of riverside black poplar forests on the flood plain of the Drava River (southwestern Hungary) by means of 25 relevés. Based on the results of traditional analyses (vegetation structure and attributes of constituent species), their ecological niche and place in plant succession, those streamside forests can be identified with the plant association Carduo crispi-Populetum nigrae described from the Szigetköz region (northwestern Hungary). Stands of this association develop from purple willow scrubs (Rumici crispi-Salicetum purpureae), and are located at an elevation about one and a half meters lower than those of its successor vegetation unit, the white poplar association (Senecioni sarracenici-Populetum albae).
-
Turkey oak forests on sand (Fraxino orno-Quercetum cerridis) in Vértesalja (Hunga-ry)
34–57Views:5Here we evaluate the phytosociological characteristics of the turkey oak forests on sand (Fraxino orno-Quercetum cerridis) found at the northern foothills of the Vértes Hills, Hungary. Using the traditional Braun-Blanquet method, 20 vegetation samples were collected and compared with turkey oak forests growing in similar ecological situations in other parts of the country. The traditional and multivariate analyses showed that our samples were quite different from the compared forests, and only the forests in the Bakonyalja and the Pilis Mts showed some similarity with the compared forests. Our samples had the lowest proportion of Quercetea pubescentis-petraeae species among the compared forests, and the highest proportion of specialists (Corydalis pumila, Daphne laureola, Doronicum hungaricum, Lychnis coronaria, Physocaulis nodosus, Primula veris, Scutellaria columnae, Sorbus domestica and Veratrum nigrum). The samples were well separated from the compared forests and formed a distinct group.
-
Oak-hornbeam and turkey oak forests growing on sand on the foothills of the Pilis Range (Corydali pumilae-Carpinetum, Fraxino orno-Quercetum cerridis)
79–105Views:159We studied the phytosociological characteristics of hornbeam and turkey oak dominated forests growing on sand at the southwestern foot of the Pilis Mountains. Here we present the results of analyses of 10 relevés of each community. The species composition of the hornbeam forest samples is characterized by a relatively high proportion of Fagetalia species. Notable species in the community are Aconitun vulparia, Berberis vulgaris, Epipactis helleborine agg., Galanthus nivalis, Geranium lucidum, Lilium martagon, Omphalodes scorpioides, Piptatherum virescens, Primula veris, Scilla vindobonensis, Sorbus aria agg., S. domestica, Veratrum nigrum, and Waldsteinia geoides. In the turkey oak forests, species characteristic of the class Quercetea pubescentis-petraeae have the highest proportion. Notable and locally typical species occurring in the community are Anthericum ramosum, Digitalis grandiflora, Iris variegata, Piptatherum virescens, Primula veris, Achillea distans, Dictamnus albus, Galanthus nivalis, Lonicera xylosteum, Scilla vindobonensis, Sorbus domestica, Veratrum nigrum, as well as Lunaria annua and Tilia tomentosa that are possibly introduced here. Based on the results of statistical analyses, the two forest communities are best identified with the associations named Corydali pumilae-Carpinetum and Fraxino orno-Quercetum cerridis, both occurring in the Transdanubian Mountain Range.
-
Forests of the sand-hill region of the Danube–Tisza Interfluve (Convallario-Carpinetum Kevey 2008)
49–76Views:196The heavily fragmented and isolated pedunculate oak-hornbeam forests are remnants of the natural vegetation of the sand dune area of the Danube–Tisza Interfluve, where they are found mostly in interdunal depressions. To determine their main phytosociological characteristics, we collected and analyzed data from 25 stands. The results show that these forests are the most similar in species composition to the oak-hornbeam forests (Convallario-Carpinetum Kevey 2008) described from the Nyírség.
-
White poplar riparian forests on the Csepel-sziget, Middle-Hungary (Senecioni sarracenici-Populetum albae Kevey in Borhidi & Kevey 1996)
57–78Views:189In this paper the white poplar riparian forests (Senecioni sarracenici-Populetum albae) growing on the Csepel-sziget and its vicinity are described and characterized based on 25 phytosociological relevés. These communities grow on loose fluvial sand and raw alluvial soils on the elevated parts of the lower river floodplain. They can readily be distinguished from willow gallery forests (Leucojo aestivi-Salicetum albae) which have no shrub layers and grow in habitats 1–1.5 m below the level of poplar forests on rather heavy and muddy soils. They differ also from the oak-ash-elm forests (Scillo vindobonensis-Ulmetum) growing in the upper floodplain. Certain – partly submontane – plants that are rare or completely absent in other parts of the Great Hungarian Plains may also occur in them, such as Anemone ranunculoides, Carex remota, Clematis recta, Crataegus × degenii, Crataegus nigra, Epipactis helleborine, Equisetum hyemale, Galanthus nivalis, Lathraea squamaria, Leucojum aestivum, Paris quadrifolia, Scilla vindobonensis, Vitis sylvestris. This association is classified in the sub-alliance Populenion nigro-albae Kevey 2008 in the syntaxonomical system.
-
Remnants of closed oak woods on loess in the Mezőföld (Pulmonario mollis-Quercetum roboris Kevey 2008)
66–93Views:159The phytosociological characterization of closed oak forests occurring in the loess-covered part of Central Hungary (Mezőföld) is presented. Such forest fragments are found very sporadically in that predominantly treeless region, mostly in semi-dry habitats of north-facing hillsides. This plant community represents an intermediate stage between open steppe woodland (Aceri tatarici-Quercetum pubescentis-roboris) and closed mesic oak-hornbeam forests (Corydali cavae-Carpinetum). Analyses of 20 phytosociological samples using multivariate grouping methods (cluster analysis, principal coordinates analysis) showed a clear difference between these samples and samples of similar communities occurring in the area. In the species composition the characteristic elements of dry and mesic oak forests (Quercetea pubescentis-petraeae, Quercetalia cerridis, Aceri tatarici-Quercion and Fagetalia, respectively) played a major role. On the other hand, dry grassland species (Festuco-Brometea, Festucetalia valesiacae, Festucion rupicolae, etc.) were much less significant than in steppe woodlands. In terms of chorology, European and sub-Mediterranean floristic elements were dominant in the samples, while the proportion of continental elements was substantially smaller than that in steppe woodlands. As a result, our samples were identified with the plant association Pulmonario mollis-Quercetum roboris Kevey 2008, which is classified into the suballiance Polygonato latifolio-Quercenion roboris Kevey 2008 in the phytosociological system.