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001-es BibID:	BIBFORM086172
Első szerző:	Deák Balázs (biológus)
Cím:	Legacies of past land use challenge grassland recovery : An example from dry grasslands on ancient burial mounds / Balázs Deák, Orsolya Valkó, Csaba Albert Tóth, Ágnes Botos, Tibor József Novák
Dátum:	2020
ISSN:	1314-6947 1314-3301
Megjegyzések:	Due to large-scale agricultural intensification, grasslands are often restricted to habitat islands in humantransformed landscapes. There are approximately half a million ancient burial mounds built by nomadic steppic tribes in the Eurasian steppe and forest steppe zones, which act as habitat islands for dry grassland vegetation. Land use intensification, such as arable farming and afforestation by non-native woody species are amongst the major threats for Eurasian dry grasslands, including grasslands on mounds. After the launch of the Good Agricultural and Environmental Condition framework of the European Union, in Hungary there is a tendency for ceasing crop production and cutting non-native woody plantations, in order to conserve these unique landmarks and restore the historical grassland vegetation on the mounds. In this study, restoration prospects of dry grassland habitats were studied on kurgans formerly covered by croplands and Robinia pseudoacacia plantations. Soil and vegetation characteristics were studied in the spontaneously recovering grasslands. The following questions were addressed: 1; How does site history affect the spontaneous grassland recovery? 2; Do residual soil nutrients play a role in grassland recovery? In former croplands, excess phosphorus, while in former Robinia plantations, excess nitrogen was present in the soil even four years after the land use change and grassland vegetation was in an early or midsuccessional stage both on the mounds. The results showed that, without proper management measures, recovery of grassland vegetation is slow on mounds formerly used as cropland or black locust plantation. However, restoration efforts, focused on the restoration of mounds formerly covered by croplands, can be more effective compared to the restoration of mounds formerly covered by forest plantations.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk cropland kurgan nitrogen phosphorus Robinia pseudoacacia soil steppe grassland restoration
Megjelenés:	Nature Conservation-Bulgaria. - 2020 : 39 (2020), p. 113-132. -
További szerzők:	Valkó Orsolya (1985-) (biológus) Tóth Csaba Albert (1971-) (geográfus) Botos Ágnes (1990-) (természetvédelmi mérnök) Novák Tibor (1973-) (geográfus)
Pályázati támogatás:	NKFI KH 130338 Egyéb NKFI KH 126476 Egyéb NKFI FK 124404 Egyéb NKFIH-1150-6/2019 Egyéb ÚNKP-19-4-DE-129 Egyéb
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001-es BibID:	BIBFORM101279
035-os BibID:	(WoS)000785983700004 (Scopus)85128657457
Első szerző:	Tóth Ágnes
Cím:	Vertical distribution of soil seed bank and the ecological importance of deeply buried seeds in alkaline grasslands / Tóth Ágnes, Deák Balázs, Tóth Katalin, Kiss Réka, Lukács Katalin, Rádai Zoltán, Godó Laura, Borza Sándor, Kelemen András, Miglécz Tamás, Bátori Zoltán, Novák Tibor József, Valkó Orsolya
Dátum:	2022
ISSN:	2167-8359
Megjegyzések:	Background: Soil seed banks play a central role in vegetation dynamics and may be an important source of ecological restoration. However, the vast majority of seed bank studies examined only the uppermost soil layers (0?10 cm); hence, our knowledge on the depth distribution of seed bank and the ecological significance of deeply buried seeds is limited. The aim of our study was to examine the fine-scale vertical distribution of soil seed bank to a depth of 80 cm, which is one of the largest studied depth gradients so far. Our model systems were alkaline grasslands in East- Hungary, characterised by harsh environmental conditions, due to Solonetz soil reference group with Vertic horizon. We asked the following questions: (1) How do the seedling density and species richness of soil seed bank change along a vertical gradient and to what depth can germinable seeds be detected? (2) What is the relationship between the depth distribution of the germinable seeds and the species traits? Methods: In each of the five study sites, four soil cores (4 cm diameter) of 80 cm depth were collected with an auger for soil seed bank analysis. Each sample was divided into sixteen 5-cm segments by depth (320 segments in total). Samples were concentrated by washing over sieves and then germinated in an unheated greenhouse. Soil penetration resistance was measured in situ next to each core location (0?80 cm depth, 1-cm resolution). We tested the number and species richness of seedlings observed in the soil segments (N = 320), using negative binomial generalized linear regression models, in which sampling layer and penetration resistance were the predictor variables. We ran the models for morphological groups (graminoids/forbs), ecological groups (grassland species/weeds) and life-form categories (short-lived/perennial). We also tested whether seed shape index, seed mass, water requirement or salt tolerance of the species influence the vertical distribution of their seed bank. Results: Germinable seed density and species richness in the seed bank decreased with increasing soil depth and penetration resistance. However, we detected nine germinable seeds of six species even in the deepest soil layer. Forbs, grassland species and short-lived species occurred in large abundance in deep layers, from where graminoids, weeds and perennial species were missing. Round-shaped seeds were more abundant in deeper soil layers compared to elongated ones, but seed mass and ecological indicator values did not influence the vertical seed bank distribution. Our research draws attention to the potential ecological importance of the deeply buried seeds that may be a source of recovery after severe disturbance. As Vertisols cover 335 million hectares worldwide, these findings can be relevant for many regions and ecosystems globally. We highlight the need for similar studies in other soil and habitat types to test whether the presence of deep buried seeds is specific to soils with Vertic characteristics.
Tárgyszavak:	Biológiai tudományok Természettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Soil seed bank Alkali grassland Deeply buried seeds Restoration Seed ecology Soil penetration resistance Vertical distribution Seed density Vertisols Seed shape
Megjelenés:	PeerJ. - 10 (2022), p. 1-19. -
További szerzők:	Deák Balázs (1978-) (biológus) Tóth Katalin Kiss Réka (1990-) (biológus, ökológus) Lukács Katalin (1993-) (biológus) Rádai Zoltán (1991-) (biológus) Godó Laura (1992-) (biológus, ökológus) Borza Sándor (1989-) (biológus) Kelemen András (1986-) (biológus-ökológus) Miglécz Tamás (1986-) (biológus ökológus) Bátori Zoltán Novák Tibor (1973-) (geográfus) Valkó Orsolya (1985-) (biológus)
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001-es BibID:	BIBFORM079878
Első szerző:	Tóth Csaba Albert (geográfus)
Cím:	Iron age burial mounds as refugia for steppe specialist plants and invertebrates : case study from the Zsolca mounds (NE Hungary) / Csaba Albert Tóth, Balázs Deák, István Nyilas, László Bertalan, Orsolya Valkó, Tibor József Novák
Dátum:	2019
ISSN:	1581-4661 1854-9829
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk kurgan prehistoric mound loess steppe biodiversity cropland matrix microhabitat slope ground-dwelling invertebrates
Megjelenés:	Hacquetia. - 18 : 2 (2019), p. 189-200. -
További szerzők:	Deák Balázs (1978-) (biológus) Nyilas István (1956-) (biológus) Bertalan László (1989-) (geográfus) Valkó Orsolya (1985-) (biológus) Novák Tibor (1973-) (geográfus)
Pályázati támogatás:	NKFI KH 130338 Egyéb NKFI FK 124404 Egyéb NKFIH KH 126476 Egyéb Bolyai János Research Scholarship of the Hungarian Academy of Sciences Egyéb ÚNKP-18-4-DE-9 Egyéb ÚNKP-18-4-DE-12 Egyéb EFOP-3.6.1-16-2016-00022 EFOP
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