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001-es BibID:	BIBFORM117115
035-os BibID:	(Scopus)85101687611 (cikkazonosító)619812
Első szerző:	Deák Balázs (biológus)
Cím:	Ancient Burial Mounds Provide Safe Havens for Grassland Specialist Plants in Transformed Landscapes- A Trait-Based Analysis / Balázs Deák, Zoltán Rádai, Zoltán Bátori, András Kelemen, Katalin Lukács, Réka Kiss, István Elek Maák, Orsolya Valkó
Dátum:	2021
ISSN:	2296-701X
Megjegyzések:	Due to the intensified land use in transformed landscapes, grassland biodiversity is often restricted to habitat fragments inadequate for arable use or for urban development. In continental parts of Eurasia, the ?600,000 ancient burial mounds (called ?kurgans") built by nomadic tribes of the steppes are amongst the most widespread landmarks providing refuge for dry grassland species. In our study by using plant functional groups and functional traits, we aimed at gaining insight into the ecological and evolutionary processes shaping the structure and the composition of assemblages of grassland specialist plant species on kurgans embedded in the agricultural landscapes of East-Hungary. As a comparison, we also studied roadside verges and pristine extensive grasslands in the same region. We found that despite their small size, due to the lack of human disturbances and high microhabitat diversity kurgans can maintain a high species richness and percentage cover of specialists, especially when compared to verges. We revealed that assemblages of specialist plants on kurgans are characterized by traits typical to terrestrial habitat islands such as self-compatibility, large seed mass and tall stature. Kurgans and extensive grasslands were characterized by higher functional diversity (both at the level of single traits and multi-trait based functional dispersion) which is probably due to the higher level of environmental heterogeneity compared to the homogeneous environment in verges.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk habitat island refuge site verge functional traits phylogenetics conservation environmental heterogeneity steppe
Megjelenés:	Frontiers in Ecology and Evolution. - 9 (2021), p.1-13. -
További szerzők:	Rádai Zoltán (1991-) (biológus) Bátori Zoltán Kelemen András (1986-) (biológus-ökológus) Lukács Katalin (1993-) (biológus) Kiss Réka (1990-) (biológus, ökológus) Maák István Elek Valkó Orsolya (1985-) (biológus)
Pályázati támogatás:	KH 130338 Egyéb FK 135329 Egyéb FK 124404 Egyéb KH 126476 Egyéb K 124796 Egyéb NTP-NFTÖ-20-B-0093 Egyéb KKP 133839 Egyéb
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001-es BibID:	BIBFORM073792
035-os BibID:	(WOS)000440138400018 (Scopus)85050822898
Első szerző:	Godó Laura (biológus, ökológus)
Cím:	Ecosystem engineering by foxes is mediated by the landscape context : a case study from steppic burial mounds / Godó Laura, Tóthmérész Béla, Valkó Orsolya, Tóth Katalin, Kiss Réka, Radócz Szilvia, Kelemen András, Török Péter, Švamberková Eva, Deák Balázs
Dátum:	2018
ISSN:	2045-7758
Megjegyzések:	In intensively used landscapes remnant grassland fragments are often restricted to places unsuitable for agricultural cultivation. Such refuges are the ancient burial mounds called 'kurgans', which are typical landscape elements of the Eurasian steppe and forest steppe zone. Due to their hill-like shape, loose soil structure and undisturbed status kurgans provide proper habitats for burrowing mammals. Accordingly, grassland vegetation on kurgans is often exposed to bioturbation, which can influence the habitat structure and plant species pool. In our study we explored the effect of fox burrows and landscape context on the habitat properties and vegetation composition of small landscape elements, using kurgans as model habitats. We surveyed the vegetation of fox burrows and that of the surrounding grassland on five kurgans situated in cleared landscapes surrounded by arable lands, and five kurgans in complex landscapes surrounded by grazed grasslands. We recorded the percentage cover of vascular plants, the amount of litter and soil moisture content in twelve 0.5m?0.5m plots per kurgan, in a total of 120 plots. We found that foxes considerably transformed habitat conditions and created microhabitats by changing the soil nutrient availability and reducing total vegetation cover and litter. Several grassland specialist species, mostly grasses (Agropyron cristatum, Elymus hispidus and Stipa capillata) established in the newly created microhabitats, although the cover of noxious species was also considerable. We found that landscape context influenced the sort of species which could establish on kurgans by affecting the available species pool and soil moisture. Our results revealed that foxes act as ecosystem engineers on kurgans by transforming abiotic and biotic conditions by burrowing. Their engineering activity maintains disturbance-dependent components of dry grasslands and increases local environmental heterogeneity.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk biodiversity disturbance fragmentation isolation kurgan sacred sites steppe weeds
Megjelenés:	Ecology and Evolution. - 8 : 14 (2018), p. 7044-7054. -
További szerzők:	Tóthmérész Béla (1960-) (ökológus) Valkó Orsolya (1985-) (biológus) Tóth Katalin (1988-) (biológus) Kiss Réka (1990-) (biológus, ökológus) Radócz Szilvia (1988-) (biológus) Kelemen András (1986-) (biológus-ökológus) Török Péter (1979-) (biológus-ökológus) Švamberková Eva (1989-) (Biológus) Deák Balázs (1978-) (biológus)
Pályázati támogatás:	OTKA-111807 OTKA 115627 OTKA OTKA-116639 OTKA 116200 OTKA NKFI FK 124404 Egyéb NKFI KH 126476 Egyéb NKFI KH 126477 Egyéb NKFI K 119225 Egyéb Bolyai János Ösztöndíj MTA ÚNKP-17-4-III-DE-160 Egyéb ÚNKP-17-4-III-DE-151 Egyéb
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM079671
035-os BibID:	(WOS)000399738700040 (Scopus)85015177805
Első szerző:	Kelemen András (biológus-ökológus)
Cím:	New aspects of grassland recovery in old-fields revealed by trait-based analyses of perennial-crop-mediated succession / Kelemen András, Tóthmérész Béla, Valkó Orsolya, Miglécz Tamás, Deák Balázs, Török Péter
Dátum:	2017
ISSN:	2045-7758
Megjegyzések:	Classical old-field succession studies focused on vegetation changes after the abandonment of annual croplands or on succession after the elimination of cultivated crops. Perennial-crop-mediated succession, where fields are initially covered by perennial crops, reveals alternative aspects of old-field succession theories. We tested the validity of classical theories of old-field succession for perennial-crop-mediated succession. We formulated the following hypotheses: (1) functional diversity increases with increasing field age; (2) resource acquisition versus conservation trade-off shifts toward conservation at community level during the succession; (3) the importance of spatial and temporal seed dispersal decreases during the succession; and (4) competitiveness and stress-tolerance increases and ruderality decreases at community level during the succession. We studied functional diversity, trait distributions and plant strategies in differently aged old-fields using chronosequence method. We found increasing functional richness and functional divergence, but also unchanged or decreasing functional evenness. We detected a shift from resource acquisition to resource conservation strategy of communities during the succession. The role of spatial and temporal seed dispersal was found to be important not only at the initial but also at latter successional stages. We found an increasing stress-tolerance and a decreasing ruderality during succession, while the competitiveness remained unchanged at the community level. Despite the markedly different starting conditions, we found that classical and perennial-crop-mediated old-field successions have some similarities regarding the changes of functional diversity, resource acquisition versus conservation trade-off, and seed dispersal strategies. However, we revealed also the subsequent differences. The competitive character of communities remained stable during the succession; hence, the initial stages of perennial-crop-mediated succession can be similar to the middle stages of classical old-field succession. Moreover, the occupied functional niche space and differentiation were larger in the older stages, but resources were not effectively utilized within this space, suggesting that the stabilization of the vegetation requires more time.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk alfalfa C-S-R strategies functional diversity leaf traits resource acquisition seed traits
Megjelenés:	Ecology and Evolution. - 7 : 7 (2017), p. 2432-2440. -
További szerzők:	Tóthmérész Béla (1960-) (ökológus) Valkó Orsolya (1985-) (biológus) Miglécz Tamás (1986-) (biológus ökológus) Deák Balázs (1978-) (biológus) Török Péter (1979-) (biológus-ökológus)
Pályázati támogatás:	OTKA PD 116200 OTKA OTKA K 116639 OTKA OTKA PD111807 OTKA PD 115627 Egyéb NKFIH K 119225 Egyéb NTP-NFTÖ-16-0107 Egyéb
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001-es BibID:	BIBFORM074615
035-os BibID:	(WOS)000449529800031 (Scopus)85054525879
Első szerző:	Török Péter (biológus-ökológus)
Cím:	Vegetation type and grazing intensity jointly shape grazing effects on grassland biodiversity / Török Péter, Penksza Károly, Tóth Edina, Kelemen András, Sonkoly Judit, Tóthmérész Béla
Dátum:	2018
Megjegyzések:	In the Palaearctic steppe zone, overgrazing was identified as one of the key drivers of declining grassland biodiversity, which underlines the necessity of the functional evaluation of increased grazing pressure on grassland vegetation. We tested the following hypotheses: (i) The effect of grazing intensity on species- and functional diversity is strongly dependent on grassland-type. (ii) The magnitude of diet selectivity of grazers decreases with increasing grazing intensity. (iii) Increasing grazing intensity increases evenness and functional evenness of the subjected grasslands. We analysed vegetation patterns in four types of grasslands (Dry alkali short-grass steppes, Dry loess steppes, Non-alkali wet and Alkali wet grasslands) along an intensity gradient of beef cattle grazing at 73 sites in Hungary. Species richness, Shannon diversity, evenness, and four leaf traits were analysed. We calculated community-weighted means for each single trait, and multi-trait functional richness, functional evenness, and divergence for all leaf traits. All species and functional diversity metrics were significantly affected by the grassland type, except leaf dry matter content. The effect of interaction 2between grazing intensity and grassland type was also significant for functional richness, functional evenness, community-weighted means of leaf area, and for species richness and evenness. An upward trend of specific leaf area was detected in all grasslands with the highest scores for the overgrazed sites, but the change was also grassland-type-dependent. The detected trend suggests that with increased intensity the overall selectivity of grazing decreased. We found that evenness was affected but functional evenness was not affected by grazing intensity. Functional evenness scores were more related to the grassland type than to changes in grazing intensity, and displayed a high variability. We stress that one-size-fits-all strategies cannot be recommended and actions should be fine-tuned at least at the level of grassland type.
ISBN:	2045-7758
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk functional diversity leaf traits overgrazing plant traits steppe prairie
Megjelenés:	Ecology and Evolution. - 8 : 20 (2018), p. 10326-10335. -
További szerzők:	Penksza Károly Tóth Edina (1990-) (biológus) Kelemen András (1986-) (biológus-ökológus) Sonkoly Judit (1989-) (biológus) Tóthmérész Béla (1960-) (ökológus)
Pályázati támogatás:	NFKIH-K-119225 Egyéb NFKIH-K-116639 Egyéb NFKIH-K-125423 Egyéb NFKIH-KH-126477 Egyéb
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