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001-es BibID:BIBFORM081281
035-os BibID:(WoS)000386500700015 (Scopus)84961662270
Első szerző:Deák Balázs (biológus)
Cím:Cultural monuments and nature conservation : a review of the role of kurgans in the conservation and restoration of steppe vegetation / Balázs Deák, Béla Tóthmérész, Orsolya Valkó, Barbara Sudnik-Wójcikowska, Ivan I. Moysiyenko, Tatyana M. Bragina, Iva Apostolova, Iwona Dembicz, Nikolay I. Bykov, Péter Török
Dátum:2016
ISSN:0960-3115 1572-9710
Megjegyzések:Steppe is among the most endangered biomes of the world, especially in Eastern Europe, where more than 90 % of original steppes have been destroyed due to conversion into croplands, afforestation and other human activities. Currently, steppe vegetation is often restricted to places unsuitable for ploughing, such as ancient burial mounds called kurgans. The aim of our study was to collect and synthesise existing knowledge on kurgans by a review of research papers and grey literature. The proportion of kurgans covered by steppe vegetation increases from west to east and from lowlands to uplands. Despite their small size, kurgans act as biodiversity hotspots and harbour many red-listed species. High overall species richness and a high proportion of grassland specialists are maintained by a pronounced fine-scale environmental heterogeneity. The main factors threatening the biodiversity of kurgans are intensified agriculture and construction works. We conclude that kurgans can play a crucial role in preserving steppe vegetation, especially in intensively used agricultural landscapes in the western part of the steppe zone. Despite the vital role of kurgans in sustaining steppe vegetation, we identified serious knowledge gaps on their distribution, vegetation, flora and fauna and their potential role in steppe restoration.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Agro-biodiversity
Barrow
Eurasia
Fragmentation
Grassland restoration
Mound
Megjelenés:Biodiversity And Conservation. - 25 : 12 (2016), p. 2473-2490. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Valkó Orsolya (1985-) (biológus) Sudnik-Wójcikowska Barbara Moysiyenko, Ivan I. Bragina, Tatyana M. Apostolova, Iva Dembicz, Iwona Bykov, Nikolay I. Török Péter (1979-) (biológus-ökológus)
Pályázati támogatás:OTKA PD 115627
OTKA
OTKA K 116639
OTKA
OTKA PD 111807
OTKA
SROP-4.2.2.B-15/1/KONV-2015-0001
egyéb
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2.

001-es BibID:BIBFORM104980
Első szerző:Dengler, Jürgen
Cím:The Eurasian Dry Grassland Group (EDGG) in 2019-2020 / Jürgen Dengler, Alla Aleksanyan, Didem Ambarli, Idoia Biurrun, Iwona Dembicz, Anna Kuzemko, Péter Török, Stephen Venn
Dátum:2021
ISSN:1581-4661 1854-9829
Megjegyzések:This report summarizes the activities and achievements of the Eurasian Dry Grassland Group (EDGG) from July 2019 to December 2020. During this period, Covid-19 allowed only one live event, the 14th EDGG Field Workshop to the alpine vegetation of Switzerland, organised ad hoc as a replacement for the cancelled Field Workshop in the Ukrainian steppes. The cancelled Eurasian Grassland Conference in Spain found a partial replacement in ?Talk Grasslands!", a series of online talks during winter 2020/2021. EDGG's own diamond open access periodical, Palaearctic Grasslands, is a novel combination of scientific journal, photo magazine and member newsletter. With five issues during the reporting time it contributed much to EDGG's attractiveness. EDGG edited four Special Features in international journals (Tuexenia, Hacquetia, Flora) and contributed 13 chapters on grasslands and shrublands of the Palaearctic biogeographic realm to the Encyclopedia of the world's biomes. EDGG's vegetation-plot database GrassPlot with multi-scale and multi-taxon diversity data of grasslands and other open habitats of the Palaearctic is now integrated into the EDGG website with the GrassPlot Diversity Explorer
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
biodiversity
conservation
Eurasian Dry Grassland Group (EDGG)
grassland
GrassPlot
Palaearctic Grasslands
vegetation-plot database
Megjelenés:Hacquetia. - 20 : 1 (2021), p. 171-176. -
További szerzők:Aleksanyan, Alla Ambarli, Didem Biurrun, Idoia Dembicz, Iwona Kuzemko, Anna Török Péter (1979-) (biológus-ökológus) Venn, Stephen
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3.

001-es BibID:BIBFORM104990
035-os BibID:(Scopus)85090854880
Első szerző:Dengler, Jürgen
Cím:Grasslands of the Palaearctic Biogeographic Realm : Introduction and Synthesis / Jürgen Dengler, Idoia Biurrun, Steffen Boch, Iwona Dembicz, Péter Török
Dátum:2020
Megjegyzések:Grasslands are spontaneously occurring herbaceous vegetation types that are mostly dominated by grasses or other graminoids and have usually > 10% herb-layer cover, while woody species area absent or have a significantly lower abundance than the herbs. In the Palaearctic biogeographic realm, natural and secondary grasslands (76% and 24% of all grasslands, respectively) cover about 10.0 million km2, i.e., 18% of its territory, which constitute 41% of global grasslands-more than any other biogeographic realm. In ?The encyclopedia of the world`s biomes," the Palaearctic grasslands are placed in the section ?Grasslands and shrublands," where we defined 10 regions, which are treated in individual chapters: Western Europe, Northern Europe and Baltic States, Eastern Europe, Mediterranean Region, Middle East and Caucasus, Russia, Kazakhstan and Middle Asia, Mongolia, China, and Japan. These regions cover the huge majority of the realm and about 98% of its grasslands. Each chapter describes the extent, physiogeography, origin, biodiversity and typology of the grasslands in the region, the threats for grassland diversity and extent, as well as grassland management and conservation. Grasslands are important habitats for many groups of taxa. Dry calcareous grasslands and steppes constitute habitat of most of Europe`s butterfly and Orthoptera species, and they host significant number of European endemic plants. In small spatial scales (i.e., below 100 m2) Palaearctic grasslands, especially meso-xeric ones, can hold even higher species diversity of plants than tropical rainforests. However, Palaearctic grasslands are also among the most intensively and negatively human-impacted habitats. Changes in grassland management, like overgrazing or other types of intensification as well as abandonment were assessed as the most important recent and future threats. Other important reasons of decline in grassland diversity are habitat loss and altered site conditions. The negative impact of climate change and invasive species is predicted to be stronger in the future. In the last years, various conservation efforts to monitor, maintain and promote grassland extent and diversity were made. However, to counteract the negative trends, these efforts urgently need to be intensified and their efficiency needs to be improved.
ISBN:978-0-12-816097-8
Tárgyszavak:Természettudományok Környezettudományok könyvfejezet
könyvrészlet
Megjelenés:Encyclopedia of the World's Biomes / ed. by Michael I. Goldstein, Dominick A. DellaSala. - p. 617-637. -
További szerzők:Biurrun, Idoia Boch, Steffen Dembicz, Iwona Török Péter (1979-) (biológus-ökológus)
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4.

001-es BibID:BIBFORM104988
035-os BibID:(Scopus)85100302574
Első szerző:Török Péter (biológus-ökológus)
Cím:Grasslands of Eastern Europe / Péter Török, Iwona Dembicz, Zora Dajić-Stevanović, Anna Kuzemko
Dátum:2020
Megjegyzések:Grasslands cover around 282,000 km2, corresponding to 14.6% of the total area in the countries of Eastern Europe, here defined as East Europe, Eastern Central-Europe, and the non-Mediterranean part of the Balkan Peninsula. Primary (steppes, alpine grasslands, azonal and extrazonal grasslands) and secondary grasslands (created mostly by forest cuts) provide a wide range of ecosystem services, such as biomass production and food for grazing animals and other herbivores, carbon storage and sequestration, home for pollinators as well as for migratory and breeding birds, water infiltration, purification and storage, erosion prevention and recreation. Both primary and secondary grasslands in Eastern Europe harbor a rich flora and fauna, but they are threatened by area loss, the twin threats of intensification and abandonment, invasive species encroachment, and climate change. Large areas of grasslands in the lowland regions have been converted to croplands, and the remaining grassland fragments are in general degraded by intensified use. Intensified use and application of tillage, drainage, intercropping, high intensity grazing or the use of pesticides, mineral and organic fertilizers have a detrimental effect on flora and fauna. In contrast, low accessible areas in mountains, foothills or other marginal areas, the traditional grassland management is abandoned. To recover or improve grassland biodiversity, in many countries, the re-introduction of traditional management regimes by mowing or grazing have been suggested. In case of completely destroyed grasslands, restoration of grassland vegetation and diversity by spontaneous succession and/or technical reclamation are necessary. While in large-scale restoration programs successes were often reported, it was also noted by the authors that the success of restoration was strongly influenced by the availability of high-quality grasslands in the landscape, acting as donor sites or spontaneous sources of propagules. High quality grassland fragments act as hotspots of biodiversity in landscapes dominated by agriculture; thus, their preservation should be prioritized in conservation actions.
ISBN:978-0-12-816097-8
Tárgyszavak:Természettudományok Környezettudományok könyvfejezet
könyvrészlet
Megjelenés:Encyclopedia of the World's Biomes / ed. by Michael I. Goldstein, Dominick A. DellaSala. - p. 703-713. -
További szerzők:Dembicz, Iwona Dajić-Stevanović, Zora Kuzemko, Anna
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5.

001-es BibID:BIBFORM104983
035-os BibID:(cikkazonosító)e13044 (WOS)000666878600009 (Scopus)85109201038
Első szerző:Zhang, Jinghui
Cím:Scale dependence of species-area relationships is widespread but generally weak in Palaearctic grasslands / Jinghui Zhang, François Gillet, Sándor Bartha, Juha Mikael Alatalo, Idoia Biurrun, Iwona Dembicz, John-Arvid Grytnes, Renaud Jaunatre, Remigiusz Pielech, Koenraad Van Meerbeek, Denys Vynokurov, Stefan Widmer, Alla Aleksanyan, Kuber Prasad Bhatta, Juan Antonio Campos, Patryk Czortek, Jiri Dolezal, Franz Essl, Itziar García-Mijangos, Riccardo Guarino, Behlül Güler, Michal Hájek, Anna Kuzemko, Frank Yonghong Li, Swantje Löbel, Halime Moradi, Alireza Naqinezhad, Vasco Silva, Eva Šmerdová, Judit Sonkoly, Simon Stifter, Amir Talebi, Péter Török, Hannah White, Jianshuang Wu, Jürgen Dengler
Dátum:2021
ISSN:1100-9233 1654-1103
Megjegyzések:Questions Species-area relationships (SARs) are fundamental for understanding biodiversity patterns and are generally well described by a power law with a constant exponent z. However, z-values sometimes vary across spatial scales. We asked whether there is a general scale dependence of z-values at fine spatial grains and which potential drivers influence it. Location Palaearctic biogeographic realm. Methods We used 6,696 nested-plot series of vascular plants, bryophytes and lichens from the GrassPlot database with two or more grain sizes, ranging from 0.0001 m(2) to 1,024 m(2) and covering diverse open habitats. The plots were recorded with two widespread sampling approaches (rooted presence = species "rooting" inside the plot; shoot presence = species with aerial parts inside). Using Generalized Additive Models, we tested for scale dependence of z-values by evaluating if the z-values differ with gran size and tested for differences between the sampling approaches. The response shapes of z-values to grain were classified by fitting Generalized Linear Models with logit link to each series. We tested whether the grain size where the maximum z-value occurred is driven by taxonomic group, biogeographic or ecological variables. Results For rooted presence, we found a strong monotonous increase of z-values with grain sizes for all grain sizes below 1 m(2). For shoot presence, the scale dependence was much weaker, with hump-shaped curves prevailing. Among the environmental variables studied, latitude, vegetation type, naturalness and land use had strong effects, with z-values of secondary peaking at smaller grain sizes. Conclusions The overall weak scale dependence of z-values underlines that the power function generally is appropriate to describe SARs within the studied grain sizes in continuous open vegetation, if recorded with the shoot presence method. When clear peaks of z-values occur, this can be seen as an expression of granularity of species composition, partly driven by abiotic environment.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
beta diversity
grassland
GrassPlot
Heterogeneity
Palaearctic
power law
rooted presence
scale dependence
shoot presence
species-area relationship
vegetation
z-value
Megjelenés:Journal of Vegetation Science. - 32 : 3 (2021), p. 1-14. -
További szerzők:Gillet, François Bartha Sándor Alatalo, Juha Mikael Biurrun, Idoia Dembicz, Iwona Grytnes, John-Arvid Jaunatre, Renaud Pielech, Remigiusz van Meerbeek, Koenraad Vynokurov, Denys Widmer, Stefan Aleksanyan, Alla Bhatta, Kuber Prasad Campos, Juan Antonio Czortek, Patryk Dolezal, Jiri Essl, Franz García-Mijangos, Itziar Guarino, Riccardo Güler, Behlül Hájek, Michal Kuzemko, Anna Li, Frank Yonghong Löbel, Swantje Moradi, Halime Naqinezhad, Alireza (botanikus) Silva, Vasco Šmerdová, Eva Sonkoly Judit (1989-) (biológus) Stifter, Simon Talebi, Amir Török Péter (1979-) (biológus-ökológus) White, Hannah J. Wu, Jianshuang Dengler, Jürgen
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6.

001-es BibID:BIBFORM104967
035-os BibID:(cikkazonosító)e3725 (WOS)000800746600001 (SCopus)85130713920
Cím:Environmental drivers and spatial scaling of species abundance distributions in Palaearctic grassland vegetation / Werner Ulrich, Thomas J. Matthews, Idoia Biurrun, Juan Antonio Campos, Patryk Czortek, Iwona Dembicz, Franz Essl, Goffredo Filibeck, Gian-Pietro Giusso del Galdo; Behlül Güler, Alireza Naqinezhad, Péter Török, Jürgen Dengler
Dátum:2022
ISSN:0012-9658 1939-9170
Megjegyzések:Species abundance distributions (SADs) link species richness with species abundances and are an important tool in the quantitative analysis of ecological communities. Niche-based and sample-based SAD models predict different spatial scaling properties of SAD parameters. However, empirical research on SAD scaling properties is largely missing. Here we extracted percentage cover values of all occurring vascular plants as proxies of their abundance in 1725 10-m(2) plots from the GrassPlot database, covering 47 regional data sets of 19 different grasslands and other open vegetation types of the Palaearctic biogeographic realm. For each plot, we fitted the Weibull distribution, a model that is able to effectively mimic other distributions like the log-series and lognormal, to the species-log abundance rank order distribution. We calculated the skewness and kurtosis of the empirical distributions and linked these moments, along with the shape and scale parameters of the Weibull distribution, to plot climatic and soil characteristics. The Weibull distribution provided excellent fits to grassland plant communities and identified four basic types of communities characterized by different degrees of dominance. Shape and scale parameter values of local communities on poorer soils were largely in accordance with log-series distributions. Proportions of subdominant species tended to be lower than predicted by the standard lognormal SAD. Successive accumulation of plots of the same vegetation type yielded nonlinear spatial scaling of SAD moments and Weibull parameters. This scaling was largely independent of environmental correlates and geographic plot position. Our findings caution against simple generalizations about the mechanisms that generate SADs. We argue that in grasslands, lognormal-type SADs tend to prevail within a wider range of environmental conditions, including more extreme habitats such as arid environments. In contrast, log-series distributions are mainly restricted to comparatively species-rich communities on humid and fertile soils.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
lognormal distribution
log-series distribution
Palaearctic grassland
plant cover
spatial scaling
species abundance
Weibull distribution
Megjelenés:Ecology. - 103 : 8 (2022), p. 1-16. -
További szerzők:Ulrich, Werner Matthews, Thomas J. Biurrun, Idoia Campos, Juan Antonio Czortek, Patryk Dembicz, Iwona Essl, Franz Filibeck, Goffredo del Galdo, Gian-Pietro Giusso Güler, Behlül Naqinezhad, Alireza (botanikus) Török Péter (1979-) (biológus-ökológus) Dengler, Jürgen
Pályázati támogatás:NKFIH-K-119225
Egyéb
NKFIH-K-137573
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