Content of the Volume 29.
Tuba, Z.: Overview of the flora and vegetation of the Hungarian Bodrogköz
Butorac, B.: Review of aquatic vegetation of the regional park "Stari Begej"
Tóthmérész Béla - Erdei Zsolt: New features of MULTI-PATTERN 1.10: Robust nonlinear smoothing
Bába, K.: The antecedents of the Tisza Research
Penksza, K., Barczi, A., Benyovszky, B. M., Möseler, B. M., Birkenheuer, V. and Szabó, T. (1995): Relationship between vegetation and soil on the northeastern slope of the Fehér-szirt (White cliff) of Kesztölc. - Tiscia 29, 3-10.
Abstract. In 1993-1994, the forest vegetation of the northeastern slope of the Fehér-szirt (White Cliff) near Kesztölc, Hungary, has been investigated by transect method. Along a 400 m transect, phytosociological relevés were taken in 20*20 m adjacent plots through the Mercuriali-Tilietum Zólyomi et Jakucs 1958, Querco petraeae-Carpinetum Soó et Pócs (1931) 1957 and the Melitti-Fagetum Soó 1962. Along the transect studied specific soil parameters were analyzed: moisture content, bulk density, humus content, pH (H20 and KCl), lime content (CaCO3), nutrient regime (N,P,K), texture, 'sticky point according to Arany' (KA) and hygroscopy. According to the phytosociological data, no clear-cut border can be drawn between the associations. Changes in the vegetation correlate with the physical properties of the soil: more mesophilous beech forest on the Humic Cambisol formed from loess with a higher water capacity and the hornbeam-oak forest on Chromic Cambisol formed from sandy parent material with a lower water capacity.
Keywords: Soil, vegetation, transect.
(full text)
Tuba, Z. (1995): Overview of the flora and vegetation of the Hungarian Bodrogköz. - Tiscia 29, 11-17.
Abstract. This paper presents an overview of the flora and vegetation of Bodrogköz, Hungary. A brief introduction to the physical geography of the region is followed by a floristic account, a brief summary of the bryophyte flora and a list of protected, rare and/or endangered vascular species of the region. Of the flowering plants the mountain woodland herbaceous species, which very rarely occur in the Hungarian Plain, are of special interest. The list of protected or locally important plants contains species which are not under protection in Hungary, but are enlisted in the Red Data Book of the International Union for Conservation of Nature (IUCN). The abundant occurrence of Trapa natans, Salvia natans, Marsilea quadrifolia and Stratiotes aloides makes Bodrogköz a conservation area of international importance. The flora listing is followed by the description of the associations with an emphasis on the woodland formations.
Key words: Samicum, flora, bryophytes, vascular plants, protected plants,
plant communities, woodland formations.
(full text)
Margóczi, K. (1995): Interspecific associations in different successional stages of the vegetation in a Hungarian sandy area. - Tiscia 29, 19-26.
Abstract. Intrespecific associations were studied in seven plant communities in a Hungarian sandy area. Aim of present study was to reveal the differences of species coexistence structures in the vegetation of different successional stages. The frequency and intensity of pairwise interspecific associations positively correlated with the species number. It was proved, that the higher association value was not only a statistical consequence of higher species number in the species rich stands, but it referred to the organization degree of studied communities, because the species association values of the real, field samples were considerable higher than that of the spatially randomized reference of the same data. The value of the community level measure 'associatum' and sum of the pairwise associations show similar rank of the studied stands. Both measures were spatial scale dependent. Combination of principal coordinate analysis and plexus diagram method indicated two coalitions in the species rich communities, such as closed grassland and shrubby habitat: an assemblage with higher species number and a second one with lower species number.
Keywords: interspecific association, associatum, information theory
statistics, spatial scale dependence, succession, sandy vegetation
(full text)
Butorac, B. (1995): Review of aquatic vegetation of the regional park "Stari Begej". - Tiscia 29, 27-32.
Abstract. Within the Regional Park "Stari Begej" the following macrophyte associations have been recorded: Nymphaeetum albo-luteae Nowinski 1928, Hydrochari-Nymphoidetum peltatae Slavniæ 1956 and Trapetum natantis Müller et Görs 1960. These associations were first mentioned in this area by Gigov and Gyôrffy in 1960. The authors also distinguished the Myriophyllo-Potametum Soó 1934 community, which is no longer present in the waters of this protected area. Preliminary studies of aquatic vegetation showed that in this habitat the association Wolffietum arrhizae Myaw. et Tx. 1960 (Lemnetea class) developed. The following new associations were found in the region: Salvinio-Spirodeletum polyrrhizae Slavniæ 1956, Lemnetum trisulcae Soó 1927, and Lemno-Utricularietum vulgaris Soó (1928) 1938.
Key words: aquatic community, floating vegetation, submerged vegetation.
(full text)
Tóthmérész, B. and Erdei, Zs. (1995): New Features of MULTI-PATTERN 1.10: Robust Nonlinear Smoothing. - Tiscia 29, 33-36.
Abstract. New features of the MULTI-PATTERN program package, to analyse the spatial structure of multispecies point patterns, are discussed. Robust nonlinear smoothers are included in the package to improve the estimation of the maximum area of a community and the curve of spatial statistics. Eight robust nonlinear smoothers are mentioned and their performances are discussed. For spatial series analyses the smoothings related to the locally weighted robust regression are performed exceptionally well.
Keywords: robust nonlinear smoothing, maximum area, spatial series analyses,
multispecies spatial point patterns.
(full text)
Sárospataki , M. and Györffy, Gy. (1995): Spatial and temporal variation of the leafhopper (Cicadina) assemblages associated with Hieracium pilosella in Hungary. - Tiscia 29, 37-40.
Abstract. We studied the structure of the leafhopper assemblages associated with Hieracium pilosella at different sites of Hungary in 1992-1994. A total of 225 individuals of 24 species were collected during the three years. The high variance of species number between sites and years indicated a large number of accidental or tourist species. The local species abundance was positively correlated with the regional distribution. One species (Eupterix notata) was very abundant at one site but was not regionally widespread. The regional distribution of the species did not show bimodality predicted by the core and satellite species hypothesis.
Key words: insect-plant relationship, local abundance, regional distribution.
(full text)
Sárospataki, M. and Fazekas, J. P. (1995): Ecological characteristics of bee communities on a sandy grassland. - Tiscia 29, 41-46.
Abstract. The Apoidea community on a sandy grassland in the Kiskunság National Park, Central Hungary consisted of 96 Apoidea species, and the diversity calculated for single traps by the Shannon-Wiener function was high (H = 2.25 - 4.19). Only the dominant species showed seasonal (Lasioglossum calceatum, Nomioides minutissima and Seladonia semitectus) or spatial (Andrena taraxaci and A. florivaga) segregation. Results from both the cluster analysis and the principal component analysis indicated that the sptial patterns of the Apoidea populations and the plant patches did not match. An interpretation of the PCA results showed that the first principal component was correlated with the value of plant cover but explained only 18% of variance; this indicated that several additional components influenced the distribution of bees, however the plant cover seems to be the most important factor.
Key words: Apoidea, community structure, insect-plant relationships,
temporal and spatial distribution.
(full text)
Krausz, K., Pápai, J. and Gallé, L.(1995): Composition of Orthoptera assemblages in grassland habitats at Lower-Tisza flood plain. - Tiscia 29, 47-52.
Abstract. The Orthoptera assemblages of continuous grassland strips on dike sides of rivers Tisza and Maros were compared with habitat islands of different distances from river flood plains. The species composition in habitat islands within 2-300 m distance is similar to the corresponding nearest dike-side meadow, whereas that of the assemblages sampled in a meadow of about 3 km from the river, differ from Tisza region. A multivariate statistical analysis shows that the differences between local Orthoptera assemblages are brought about by the distance of their habitats, while the influence of plant species composition and vegetation architecture is weaker within the range of the studied habitats.
Keywords: Orthoptera assemblages, dike sides of rivers Tisza and Maros,
habitat islands, ecological corridors, Hungary
(full text)
Gallé, L., Margóczi, K., Kovács, É., Györffy, Gy., Körmöczi, L. and Németh, L. (1995): River valleys: Are they ecological corridors? - Tiscia 29, 53-58.
Abstract. "Ecological corridor" became a buzzword in ecology
and nature conservation especially during the last five-six years when
the ideas "econet" and "ecological network" have been
widely spread. The importance and disadvantages of habitat strips ("corridors")
are well known in the biogeography and the ecology of habitat islands.
The flood plains of River Tisza and the tributaries are complexes of habitat
zones, which have a significant role in the distribution of fauna and floral
elements. The migration and distribution along habitat strips or a complex
of them are not sufficient conditions for an ecological corridor, because
the later assumes the existence of "core areas" (i.e., source
and target areas of migration and distribution), too. It is demonstrated
in this paper that the "ecological corridor" function is object-specific
and the relevance of the river flood plains in the nature conservation
is more than that of simple "ecological corridor": besides promoting
the distribution of fauna and flora, they act as core areas, too. Key words:
habitat strips, river valleys, migration, distribution, higher plants,
birds, insects.
(full text)
Bába, K. (1995): The antecedents of the Tisza Research. - Tiscia 29, 59-65.
Abstract. Regular and coordinated research work on the Tisza valley
started in 1955, but there were several initiations in the previous decades
in the framework of the ‘Great Hungarian Plain Research Concept’. This
paper gives a brief summary of these antecedents, and comprises a short
literature on Tisza research.
(full text)