Classification of mesic grasslands and their transitions of South Transdanubia (Hungary)

Abstract

-Relevés from meadows and pastures of South Transdanubia (Hungary) are evaluated by clustering and ordination methods. The relevé selection focused on the Arrhenatheretalia order but its transitions towards other types were also included. The groups of relevés are delimited and described according to differential, dominant and constant species. Ecological conditions of the groups were compared using indicator values. Nine groups were distinguished, four of them belonging strictly to the order Arrhenatheretalia. Each alliance of Arrhenatheretalia presented in the study area (Cynosurion, Arrhenatherion) was represented by two groups. Groups from these two alliances are separated along a light gradient, while groups of the same alliance differ in nutrient values. Within Cynosurion, the nutrient-poor group cannot be identified unambiguously as any syntaxa previously known from Hungary. The nutrient-rich Cynosurion meadows are similar to Lolio-Cynosuretum, however, they show a stronger relationship with wet meadows. Within Arrhenatherion, Pastinaco-Arrhenatheretum is recognised as a hay meadow of nutrient-rich soils. The other meadow type is similar to Filipendulo-Arrhenatheretum, thus raising syntaxonomical problems. There are transitional groups towards semi-dry and wet meadows, one dynamic phase and one outlier group among the other five clusters.

Grassland vegetation of the Molinio‐Arrhenatheretea class in the NW Balkan Peninsula

“…), as also pointed out by Lengyel et al. (). The species composition and DCA analysis suggest that these grasslands should be classified within the alliance Arrhenatherion elatioris .…”

“…In our analysis, these stands (together with some wet Arrhenatherion elatioris stands) are separated as a single cluster with a transitional position between Cluster 5 and 10 in the DCA diagram (Fig. 2), as also pointed out by Lengyel et al (2012). The species composition and DCA analysis suggest that these grasslands should be classified within the alliance Arrhenatherion elatioris.…”

Species share of Molinio-Arrhenatheretea class in vegetation of the Forest Arboretum in Zielonka near Poznań and in adjacent treestands

“…Worthy noticing is the fact that within green areas fresh meadows are the most abundant floristically not only within our country (LenGyeL et al 2012). …”

Forest age and topographic position jointly shape the species richness and composition of vascular plants in karstic habitats

“…Unweighted mean Ellenberg indicator values (EIVs hereafter) for light availability (L), temperature (T), soil moisture (W), soil reaction (R), and nutrient availability (N) were calculated for each plot using the system of Borhidi (1995). A number of studies have demonstrated that, despite the ordinal nature of EIVs, mean EIVs provide reliable estimates of the environmental conditions of an area (Lengyel et al, 2012;Tölgyesi et al, 2014); therefore, they are useful for monitoring environmental changes. We used one-way analysis of similarities (ANO-SIM) to compare the species composition of plots among the forest age classes, applying the Jaccard dissimilarity and 9999 permutations.…”