TY - JOUR AU - Horváth, Ferenc AU - Molnár, Csaba AU - Ortmann-né Ajkai, Adrienne AU - Csicsek, Gábor AU - Szabó, Gábor AU - Zimmermann, Zita AU - Lukács, Márió AU - Bölöni, János TI - Natura 2000 erdei élőhelytípusok szerkezet és funkció monitorozási módszere a Pannon életföldrajzi régióban JF - TERMÉSZETVÉDELMI KÖZLEMÉNYEK J2 - TERMÉSZETVÉD KÖZLEM VL - 23 PY - 2017 SP - 24 EP - 49 PG - 26 SN - 1216-4585 DO - 10.20332/tvk-jnatconserv.2017.23.24 UR - https://m2.mtmt.hu/api/publication/3293358 ID - 3293358 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Biró, Marianna AU - Iványosi, Szabó András AU - Molnár, Zsolt ED - Iványosi, Szabó András TI - Táj és történelem - ez a mi kis hazánk: A Duna–Tisza köze tájtörténete T2 - A Kiskunsági Nemzeti Park Igazgatóság negyven éve PB - Kiskunsági Nemzeti Park Igazgatósága CY - Kecskemét SN - 9789638726599 PY - 2015 SP - 41 EP - 58 PG - 18 UR - https://m2.mtmt.hu/api/publication/2946546 ID - 2946546 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Némethné Mázsa, Katalin AU - Balázs, B AU - Bölöni, János AU - Horváth, Ferenc ED - Kozak, Jacek ED - Ostapowicz, Katarzyna ED - Bytnerowicz, Andrzej ED - Wyżga, Bartłomiej TI - Strict Forest Reserve Research in the Margin of the Carpathians, the Vár-hegy Case-Study T2 - The Carpathians: Integrating Nature and Society Towards Sustainability PB - Springer Netherlands CY - Berlin CY - Heidelberg SN - 364212724X T3 - Environmental Science and Engineering, ISSN 1431-6250 PY - 2013 SP - 257 EP - 269 PG - 13 DO - 10.1007/978-3-642-12725-0_19 UR - https://m2.mtmt.hu/api/publication/2345692 ID - 2345692 LA - English DB - MTMT ER - TY - JOUR AU - Fekete, Gábor AU - Molnár, Zsolt AU - Magyari, Enikő Katalin AU - Somodi, Imelda AU - Varga, Zoltán Sándor TI - Vegetációtan és biogeográfia. Egyediség, szabályszerűség és deviáció a pannon régió vegetációjában JF - KITAIBELIA J2 - KITAIBELIA VL - 17 PY - 2012 IS - 1 SP - 23 SN - 1219-9672 UR - https://m2.mtmt.hu/api/publication/2424001 ID - 2424001 N1 - Aktuális Flóra- és Vegetációkutatás a Kárpát-medencében IX. Nemzetközi Konferencia, Gödöllő, 2012.02.24-26. előadás LA - Hungarian DB - MTMT ER - TY - GEN AU - Ungvári, Gábor AU - Molnár, Zsolt AU - Varga, Gy AU - Ellison, David TI - Ökoszisztéma-szolgáltatások nagyságrendi becslése vízgyűjtő szinten a vízkörforgást leíró vízháztartási jellemzők alapján ET - 0 PY - 2012 PG - 31 UR - https://m2.mtmt.hu/api/publication/2211559 ID - 2211559 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Molnár, Zsolt TI - Classification of pasture habitats by Hungarian herders in a steppe landscape (Hungary). JF - JOURNAL OF ETHNOBIOLOGY AND ETHNOMEDICINE J2 - J ETHNOBIOL ETHNOMED VL - 8 PY - 2012 IS - 1 PG - 26 SN - 1746-4269 DO - 10.1186/1746-4269-8-28 UR - https://m2.mtmt.hu/api/publication/2059594 ID - 2059594 N1 - Cited By :34 Export Date: 4 August 2023 Correspondence Address: Molnár, Z.; Centre for Ecological Research, H-2163, Vácrátót, Alkotmány u. 2-4, Hungary; email: molnar.zsolt@okologia.mta.hu AB - ABSTRACT: BACKGROUND: Landscape ethnoecology focuses on the ecological features of the landscape, how the landscape is perceived, and used by people who live in it. Though studying folk classifications of species has a long history, the comparative study of habitat classifications is just beginning. I studied the habitat classification of herders in a Hungarian steppe, and compared it to classifications of botanists and laymen. METHODS: For a quantitative analysis the picture sort method was used. Twenty-three pictures of 7-11 habitat types were sorted by 25 herders. 'Density' of pictures along the habitat gradient of the Hortobagy salt steppe was set as equal as possible, but pictures differed in their dominant species, wetness, season, etc. Before sorts, herders were asked to describe pictures to assure proper recognition of habitats. RESULTS: Herders classified the images into three main (and 6 smaller) groups: (1) fertile habitats at the higher parts of the habitat gradient (partos, lit. on the shore); (2) saline habitats (szik, lit. salt or saline place), and (3) meadows and marshes (lapos, lit. flooded) at the lower end of the habitat gradient. Sharpness of delimitation changed along the gradient. Saline habitats were the most isolated from the rest. Botanists identified 6 groups. Laymen grouped habitats in a less coherent way. As opposed to my expectations, botanical classification was not more structured than that done by herders. I expected and found high correspondence between the classifications by herders, botanists and laymen. All tended to recognize similar main groups: wetlands, "good grass" and dry/saline habitats. Two main factors could have been responsible for similar classifications: salient features correlated (e.g. salinity recognizable by herders and botanists but not by laymen correlated with the density of grasslands or height of vegetation recognizable also for laymen), or the same salient features were used as a basis for sorting (wetness, and abiotic stress). CONCLUSIONS: Despite all the difficulties of studying habitat classifications (more implicit, more variable knowledge than knowledge on species), conducting landscape ethnoecological research will inevitably reveal a deeper human understanding of biological organization at a supraspecific level, where natural discontinuities are less sharp than at the species or population level. LA - English DB - MTMT ER - TY - JOUR AU - Aszalós, Réka AU - Somodi, Imelda AU - Kenderes, Kata AU - Ruff, János AU - Czúcz, Bálint AU - Standovár, Tibor TI - Accurate prediction of ice disturbance in European deciduous forests with generalized linear models: a comparison of field-based and airborne-based approaches JF - EUROPEAN JOURNAL OF FOREST RESEARCH J2 - EUR J FOREST RES VL - 131 PY - 2012 IS - 6 SP - 1905 EP - 1915 PG - 11 SN - 1612-4669 DO - 10.1007/s10342-012-0641-6 UR - https://m2.mtmt.hu/api/publication/2057600 ID - 2057600 N1 - Department of Plant Systematics, Ecology and Theoretical Biology, Institute of Biology, L. Eötvös University, Pázmány P. sétány 1/c, 1117 Budapest, Hungary MTA Centre for Ecological Research, Institute of Ecology and Botany, Alkotmány u. 2-4, 2163 Vácrátót, Hungary Királyrét Forest Directorate, Ipoly Erdo Inc., Királyrét 6, 2624 Szokolya, Hungary Cited By :4 Export Date: 3 May 2021 Correspondence Address: Standovár, T.; Department of Plant Systematics, Ecology and Theoretical Biology, Institute of Biology, Pázmány P. sétány 1/c, 1117 Budapest, Hungary; email: standy@ludens.elte.hu LA - English DB - MTMT ER - TY - JOUR AU - Botta-Dukát, Zoltán TI - Co-occurrence-based measure of species' habitat specialization: Robust, unbiased estimation in saturated communities JF - JOURNAL OF VEGETATION SCIENCE J2 - J VEG SCI VL - 23 PY - 2012 IS - 2 SP - 201 EP - 207 PG - 7 SN - 1100-9233 DO - 10.1111/j.1654-1103.2011.01347.x UR - https://m2.mtmt.hu/api/publication/2035429 ID - 2035429 AB - Aims: Large vegetation plot databases enable the estimation of niche width from species co-occurrence data. Different indices have been proposed for this purpose, but do not give unbiased (i.e. independent of species pool size) and robust estimates over a wide range of conditions. The aims of the paper are to: (1) demonstrate the limitations of different methods, and (2) propose a new algorithm that results in unbiased and robust estimates. Results: Whittaker's β-diversity, calculated from raw data, is an unbiased niche width measure only if the relationship between γ-diversity and local richness is linear. However, this requirement is satisfied only in specific conditions, if both γ-diversity and local richness are linear functions of the species pool size with zero intercept. I propose the use of Beals smoothing to estimate species pools. It has been proved through analysis of simulated data that Whittaker's β calculated from species pool data is an unbiased estimate of niche width. I have shown that the robustness of the estimate can be improved by excluding extremely species-rich plots. The relative role of methodological decisions during niche width estimation was explored through analysis of a large field data set (>8000 relevés). Conclusions: The proposed algorithm results in robust, unbiased estimation, even in saturated communities, thus it avoids the drawbacks of the co-occurrence-based niche width measures proposed earlier. © 2011 International Association for Vegetation Science. LA - English DB - MTMT ER - TY - JOUR AU - Fenesi, Annamária AU - Botta-Dukát, Zoltán TI - Phenotypic divergences induced by different residence time in invasive common ragweeds JF - JOURNAL OF PLANT ECOLOGY J2 - J PLANT ECOL-UK VL - 5 PY - 2012 IS - 2 SP - 174 EP - 181 PG - 8 SN - 1752-9921 DO - 10.1093/jpe/rtr022 UR - https://m2.mtmt.hu/api/publication/2035428 ID - 2035428 AB - Aims: Possible shifts in the phenotypic performance along invasive plants' spreading route are rarely examined due to the discontinuous and incomplete records of exotic species. As the invasion history of common ragweed (Ambrosia artemisiifolia L.) is well documented in Hungary, its residence time is known for each location. By sampling a sequence of older to more recently established populations, we aimed to determine (i) whether there are phenotypic divergences along the historical spreading route of A.artemisiifolia; (ii) which traits are under selection during the invasion process and (iii) the extent of maternal effects on the individual's performance.Methods: We used a hierarchical sampling design to collect seeds from 64 individuals belonging to eight sites in four residence time categories (seven populations along the historical spreading route of ragweed in Hungary and one recently invaded site in Romania). We selected four large and four small individual plants in each population to control for maternal effects. The offspring were reared in a common garden located in Romania. Five vegetative phenotypic traits were measured at the end of the experiments and used in the subsequent analysis (plant height, basal diameter, number of secondary axes, length of the longest secondary axis and biomass). To summarize the variation of these highly correlated traits, principal component analysis was performed first and then the important components were used in linear mixed effect models.Important Findings: The residence time categories were significantly distinguished by the first component, which compresses the variation of all five measured traits. The measures gradually decrease from populations with the longest residence time (introduced more than 65 years ago) towards the most recently established populations (established less than 30 years ago). These differences might reflect the invasion history of the populations: the longer the residence time the higher the chance to develop relevant traits beneficial in invasion process. The size of the mother plant significantly influenced not only the seed mass (inversely) but also the adult performance of its offspring (directly). © The Author 2011. Published by Oxford University Press on behalf of the Institute of Botany, Chinese Academy of Sciences and the Botanical Society of China. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Lengyel, Attila AU - Csiky, János AU - Botta-Dukát, Zoltán TI - How do locally infrequent species influence numerical classification? A simulation study JF - COMMUNITY ECOLOGY J2 - COMMUNITY ECOL VL - 13 PY - 2012 IS - 1 SP - 64 EP - 71 PG - 8 SN - 1585-8553 DO - 10.1556/ComEc.13.210.1556/ComEc.13.2012.1.812.1.8 UR - https://m2.mtmt.hu/api/publication/2035427 ID - 2035427 AB - Phytosociological databases are important data sources for a broad scale of ecological investigations. Vegetation samples are traditionally managed and published in tabular format, allowing for handling of the vegetation data in various combinations. Such tables usually comprise relevés originated from the same locality, vegetation type and collected by the same investigator. Nevertheless, these relevés are usually affected by the same bias. In this paper, we demonstrate the importance of the effects acting at the level of the table (i.e., 'locally'), using the example of species removals from groups of relevés. We examine the effect of the removal of infrequent species on community classification in relation with several data set properties using simulated plot data sampled from simulated coenoclines. A data set comprised groups of relevés ('tables'), within which relevés are sampled from the same point of the coenocline. Classifications obtained after the removal or permutation of infrequent species occurrences from these tables, after the removal of rare species from randomised tables and without any treatment were compared to a reference classification based on gradient positions of the relevés. The results show that the removal of locally infrequent species helps to recognise the gradient pattern incorporated in the tabular arrangement of relevés if the arrangement of relevés among tables is in accordance with their gradient position. In cases when the grouping of relevés is irrelevant regarding the real underlying pattern, the species removal is disadvantageous. Testing between-table heterogeneity within a data set is an especially successful way of examination of biological relevance of the arrangement of relevés. We conclude that influence of table-level effects is mainly dependent on the pattern which is in accordance with the grouping of plots. LA - English DB - MTMT ER -