@article{MTMT:2423989, title = {Impact of mid-successional dominant species on the diversity and progress of succession in regenerating temperate grasslands}, url = {https://m2.mtmt.hu/api/publication/2423989}, author = {Bartha, Sándor and Szentes, Szilárd and Horváth, András and Házi, Judit and Zimmermann, Zita and Molnár, Csaba and Dancza, I and Margóczi, Katalin and Pál, Róbert and Purger, Dragica and Schmidt, Dávid and Óvári, M and Komoly, Cecília and Szentesné Sutyinszki, Zsuzsanna and Szabó, Gábor and Csathó, András István and Juhász, Melinda and Penksza, Károly and Molnár, Zsolt}, doi = {10.1111/avsc.12066}, journal-iso = {APP VEGE SCI}, journal = {APPLIED VEGETATION SCIENCE}, volume = {17}, unique-id = {2423989}, issn = {1402-2001}, year = {2014}, eissn = {1654-109X}, pages = {201-213}, orcid-numbers = {Bartha, Sándor/0000-0001-6331-7521; Zimmermann, Zita/0000-0002-7841-0777; Purger, Dragica/0000-0003-2480-0777} } @article{MTMT:2725970, title = {A comparison of the vegetation of forested and non-forested solution dolines in Hungary: a preliminary study}, url = {https://m2.mtmt.hu/api/publication/2725970}, author = {Bátori, Zoltán and Farkas, T. and Erdős, László and Tölgyesi, Csaba and Körmöczi, László and Vojtkó, András}, doi = {10.2478/s11756-014-0430-4}, journal-iso = {BIOLOGIA}, journal = {BIOLOGIA (BRATISLAVA)}, volume = {69}, unique-id = {2725970}, issn = {0006-3088}, abstract = {The present study compares the vegetation characteristics of two large forested and one large non-forested solution dolines in Hungary. We investigated the species composition and vegetation pattern along north to south transects (across the doline bottoms) and compared the richness of different species groups (dry and wet groups) on the doline slopes. We applied linear regression models for each slope to explore the effects of topography on species richness, and Detrended Correspondence Analysis (DCA) to detect the major gradients of floristic variation within each site. We found that the vegetation changed significantly along all transects; and, regardless of the vegetation cover, the doline bottoms contained several cool-adapted species. Variations within the two species groups were more pronounced on the south-facing slopes. The changes were similar in the forested dolines, indicating the role of forest cover in maintaining many cool-adapted species on the north-facing slopes as well. However, the number of cool-adapted species increased significantly along both slopes of the non-forested doline from the upper edge to the bottom. Contrary to our expectations, the species turnover along the slopes of the non-forested doline was lower than that along the slopes of the forested ones. We conclude that both the forested and non-forested dolines serve as refuges for many plant species adapted to different environmental conditions. Apart from providing an understanding of population patterns along environmental gradients, our results may also contribute to our understanding of an even more fundamental question for a future research agenda: the probable effects of climate change on vegetation characteristics in climatic islands with environmental conditions substantially different from the surrounding areas.}, keywords = {SOIL; climate; climate change; Mediterranean Region; refugium; Microclimate; Relict species; MOUNTAINS SOUTH HUNGARY; karst surface; KARSTIC SINKHOLES; SLOPE ASPECT}, year = {2014}, eissn = {1336-9563}, pages = {1339-1348}, orcid-numbers = {Bátori, Zoltán/0000-0001-9915-5309; Erdős, László/0000-0002-6750-0961; Tölgyesi, Csaba/0000-0002-0770-2107; Körmöczi, László/0000-0003-1027-3822} } @article{MTMT:1290843, title = {Vegetation of the dolines in Mecsek mountains (South Hungary) in relation to the local plant communities}, url = {https://m2.mtmt.hu/api/publication/1290843}, author = {Bátori, Zoltán and Csiky, János and Erdős, László and Morschhauser, Tamás and Török, Péter and Körmöczi, László}, doi = {10.3986/ac.v38i2-3.125}, journal-iso = {ACTA CARSOLOGICA}, journal = {ACTA CARSOLOGICA}, volume = {38}, unique-id = {1290843}, issn = {0583-6050}, year = {2009}, eissn = {1580-2612}, pages = {237-252}, orcid-numbers = {Bátori, Zoltán/0000-0001-9915-5309; Erdős, László/0000-0002-6750-0961; Körmöczi, László/0000-0003-1027-3822} } @article{MTMT:1139674, title = {Determination of diagnostic species with statistical fidelity measures}, url = {https://m2.mtmt.hu/api/publication/1139674}, author = {Chytry, M and Tichy, L and Holt, J and Botta-Dukát, Zoltán}, doi = {10.1111/j.1654-1103.2002.tb02025.x}, journal-iso = {J VEG SCI}, journal = {JOURNAL OF VEGETATION SCIENCE}, volume = {13}, unique-id = {1139674}, issn = {1100-9233}, abstract = {Statistical measures of fidelity, i.e. the concentration of species occurrences in vegetation units, are reviewed and compared. The focus is on measures suitable for categorical data which are based on observed species frequencies within a vegetation unit compared with the frequencies expected under random distribution. Particular attention is paid to Bruelheide's it value. It is shown that its original form, based on binomial distribution, is an asymmetric measure of fidelity of a species to a vegetation unit which tends to assign comparatively high fidelity values to rare species. Here, a hypergeometric form of it is introduced which is a symmetric measure of the joint fidelity of species to a vegetation unit and vice versa. It is also shown that another form of the binomial it value may be defined which measures the asymmetric fidelity of a vegetation unit to a species. These it values are compared with phi coefficient, chi-square, G statistic and Fisher's exact test. Contrary to the other measures, phi coefficient is independent of the number of releves in the data set, and like the hypergeometric form of it and the chi-square it is little affected by the relative size of the vegetation unit. It is therefore particularly useful when comparing species fidelity values among differently sized data sets and vegetation units. However, unlike the other measures it does not measure any statistical significance and may produce unreliable results for small vegetation units and small data sets. The above measures, all based on the comparison of observed/expected frequencies, are compared with the categorical form of the Dufrene-Legendre Indicator Value Index, an index strongly underweighting the fidelity of rare species. These fidelity measures are applied to a data set of 15 989 releves of Czech herbaceous vegetation. In a small subset of this data set which simulates a phytosociological table, we demonstrate that traditional table analysis fails to determine diagnostic species of general validity in different habitats and large areas. On the other hand, we show that fidelity calculations used in conjunction with large data sets can replace expert knowledge in the determination of generally valid diagnostic species. Averaging positive fidelity values for all species within a vegetation unit is a useful approach to measure quality of delimination of the vegetation unit. We propose a new way of ordering species in synoptic species-by-releve tables, Using fidelity calculations.}, year = {2002}, eissn = {1654-1103}, pages = {79-90}, orcid-numbers = {Botta-Dukát, Zoltán/0000-0002-9544-3474} }