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1.

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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2.

001-es BibID:BIBFORM075051
Első szerző:Gyulai István (biológus)
Cím:Cladocera remains and vegetation types to assess the state of oxbows / István Gyulai, Csilla Lakatos, János Tamás Kundrát, Zsuzsanna Balogh, Edina Simon, Béla Tóthmérész
Dátum:2018
ISSN:1314-6947 1314-3301
Megjegyzések:AbstractWe assessed the usefulness of Cladocera remains for establishing the ecological status of oxbows and also tested the association of Cladocera species with various vegetation types. Cladocera remains were collected from the surface sediment of four habitat types (tangled vegetation, open water, reeds and tunnels) and 15 physical and chemical parameters of surface water were studied. In the surface sediment samples, we identified 32 Cladocera taxa. There was a significant difference in the number of species amongst habitat types as per ANOVA. The benthic and plant associated Cladocera communities of reeds, tangled vegetation, open water and tunnels were clearly separated from each other by NMDS ordination. CCA showed that habitat types had characteristic Cladocera species: Pleuroxus species were frequent in the tangled vegetation habitat, while Chydorus species were frequent in the open water. Remarkably, in reeds, Bosmina species were frequent, although these species are usually common in open water. Specimens of the Alona genus were found everywhere. Our findings suggest that the remains of Cladocera species may be useful indicators to assess and monitor the structure of freshwater lakes.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Water-Sediment chemistry
Macrophytes
Zooplankton Indicator species
Megjelenés:Nature Conservation. - 29 (2018), p. 27-38. -
További szerzők:Lakatos Csilla Kundrát János Tamás (1984-) (biológus-ökológus) Balogh Zsuzsanna (1986-) (biológia környezettan tanár) Simon Edina (1981-) (ökológus) Tóthmérész Béla (1960-) (ökológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM074978
Első szerző:Kenyeres Zoltán
Cím:Enhancement of a declining European ground squirrel (Spermophilus citellus) population with habitat restoration / Kenyeres Zoltán, Bauer Norbert, Nagy Lajos, Szabó Szilárd
Dátum:2018
ISSN:1617-1381
Megjegyzések:The European ground squirrel is a vulnerable species in Europe, and a critically endangered species in the north-western part of its range. In Hungary, although there are several robust populations on a European scale, we are also witnessing a process of decline. Local individual numbers of the focal species decreased quickly until 2011, caused by the drastic reduction in the grazing and mowing of its habitat. In response to the decline of the focal species' population, a habitat restoration project was started in 2012 in order to stop and reverse this process. We studied the interventions for habitat restoration (elimination of scrubs and Elaeagnus angustifolia trees, grazing and mechanical mowing) between 2012 and 2015. In the monitoring program the number of European ground squirrel specimens was estimated by the quadrat-method and a small-scale transect survey. Potentially the most effective parameters of vegetation, soil and macroclimate were used as predictor variables. The results of our monitoring study showed that the most significant factors in the differences in the individual numbers were the height of the vegetation, and the depth and percentage of the sand and silt fractions of the soil. The density of Spermophilus citellus was positively affected by the cover of xeric grasses and therophyta plant species, soil depth, the percentage of sand and silt fractions of the soil, and was negatively affected by height of vegetation, cover of scrub, tall-herb plant species, and the percentage of the gravel fraction of the soil. Accordingly, the soil conditions of the target areas should be assessed in advance in order to achieve success in supplying the European ground squirrel population. This could help in the successful planning of interventions and relocation attempts in order to repatriate European ground squirrel populations.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
soil
vegetation structure
grazing
abandonment
Elaeagnus angustifolia
reconolization
Megjelenés:Journal for Nature Conservation. - 45 (2018), p. 98-106. -
További szerzők:Bauer Norbert Nagy Lajos Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:Higher Education Institutional Excellence Programme of the Ministry of Human Capacities in Hungary, within the framework of the 4. thematic program of the University of Debrecen
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4.

001-es BibID:BIBFORM104008
035-os BibID:(Wos)000475671200005 (Scopus)85069899297
Első szerző:Kerekes Viola
Cím:Analysis of habitat use, activity, and body condition scores of Przewalski's horses in Hortobagy National Park, Hungary / Viola Kerekes, Katalin Ozogány, István Sándor, Zsolt Vegvari, Csilla Czető, Bettina Nyírő, Timea Szabados, Lajos Széles, Zoltán Barta
Dátum:2019
ISSN:2500-008X
Megjegyzések:A founder population of Przewalski's horses (Equus ferus przewalskii) was set free in a semi-reserve called Pentezug in the Hortobagy National Park (Hungary) in 1997. Beside the Przewalski's horses reconstructed aurochs (Bos taurus taurus) were bred as well in the 24.5-km2 large area. Both species reproduced successfully in this steppe reserve, which was once the homeland of their distant ancestors. The number of large grazers has grown so quickly that different strategies of population control had to be implemented for reconstructed aurochs and horses in 2007 and 2013, respectively. The activity, habitat use, and body condition of Przewalski's horses were monitored regularly throughout the 22 years. We detected seasonal changes in the activity of the horses but the proportions of the main activity types were similar in two distant time periods. In contrast, habitat use and body condition scores for the horses showed remarkable differences between early vs. late years of the project, implying that horses were forced to use non-preferable areas and their condition was worsened in parallel with the increased population density of the large grazers. During the cold spring in 2018, there was a massive loss of both horses and cattle. These observations suggest that limited food sources could lead to changes in habitat use and/or worse body condition and a greater death rate in extreme weather conditions. In summary, strict birth control measures must be implemented in dense Przewalski's horse populations, and the habitat use and body conditions must be monitored to balance the population size and carrying capacity of the areas.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Bos taurus taurus, carrying capacity, Equus ferus przewalskii, large grazers, population control, Pentezug Reserve, reconstructed aurochs, semi-reserve
Megjelenés:Nature Conservation Research. - 4 : Suppl.2 (2019), p. 31-40. -
További szerzők:Ozogány Katalin (1982-) (biológiai fizikus) Sándor István Végvári Zsolt (1969-) (biológus) Czető Csilla Nyírő Bettina Szabados Timea Széles Lajos (1971-) (molekuláris biológus) Barta Zoltán (1967-) (biológus, zoológus)
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5.

001-es BibID:BIBFORM037383
Első szerző:Szabó Szilárd (geográfus)
Cím:Distance models in ecological network management : A case study of patch connectivity in a grassland network / Szabó Szilárd, Novák Tibor József, Elek Zoltán
Dátum:2012
Megjegyzések:Landscape connectivity is a key issue of nature conservation and distance parameters are essential for the calculation of patch level metrics. For such calculations the so-called Euclidean and the least cost distance are the most widespread models. In present work we tested both distance models for landscape connectivity, using connectivity metrics in the case of a grassland mosaic, and the ground beetle Pterostichus melas as a focal species. Our goal was to explore the dissimilarity between the two distance models and the consequent divergence from the calculated values of patch relevance in connectivity. We found that the two distance models calculated the distances similarly, but their estimations were more reliable over short distances (circa 500 m), than long distances (circa 3000 m). The variability in the importance of habitat patches (i.e. patch connectivity indices) was estimated by the difference between the two distance models (Euclidean vs. least cost) according to the patch size. The location of the habitat patches in the matrix seemed to be a more important factor than the habitat size in the estimation of connectivity. The uncertainty of three patch connectivity indices (Integral Index of Connectivity, Probability of Connectance and Flux) became high above a habitat size of 5 ha. Relevance of patches in maintaining connectivity varied even within small ranges depending on the estimator of distance, revealing the careful consideration of these methods in conservation planning.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
Distance models
Matrix effect
NDVI
Patch connectivity
Pterostichus melas
Megjelenés:Journal for Nature Conservation. - 20 : 5 (2012), p. 293-300. -
További szerzők:Novák Tibor (1973-) (geográfus) Elek Z.
Pályázati támogatás:TÁMOP-4.2.2/B-10/1-2010-0024
TÁMOP
Bolyai János Kutatási Ösztöndíj
Egyéb
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6.

001-es BibID:BIBFORM083298
Első szerző:Török Péter (biológus-ökológus)
Cím:Recovery of native grass biodiversity by sowing on former croplands : is weed suppression a feasible goal for grassland restoration? / Péter Török, Tamás Miglécz, Orsolya Valkó, András Kelemen, Balázs Deák, Szabolcs Lengyel, Béla Tóthmérész
Dátum:2012
ISSN:1617-1381
Megjegyzések:Grassland restoration on former croplands offers good opportunity to mitigate the loss of grassland biodiversity. Weed suppression can be another benefit, which becomes increasingly important because of the high recent rate of abandonment of arable lands in Central and Eastern Europe. Our aim was to evaluate the usefulness of sowing two low-diversity seed mixtures followed by annual mowing, a frequently used restoration technique, in weed suppression. We found that rapidly forming cover of sown grasses effectively suppressed short-lived weeds and their germination except in the first year. The detected dense seed bank of short-lived weeds points out the possibility and threat of later weed infestation. In the short run perennial weeds cannot be suppressed easily by sowing and annual mowing. We found that the effectiveness of seed sowing followed by mowing in weed suppression can be different on sites with different history or seed mixture. Rapidly establishing perennial weeds, such as Agropyron species were only detected in former alfalfa fields; Cirsium arvense was found in former cereal and sunflower fields but not in former alfalfa fields. We found that the rate of weed suppression and success was influenced by the seed mixtures used. In several alkali restorations the high proportion of perennial weeds was detected in year 3. In loess restorations, much lower scores were typical. This was likely caused by the different seed mixture used. The loess seed mixture contained seeds of a clonally spreading tall-grass, Bromus inermis, which could compete more effectively with clonally spreading weeds, than could short grass species with or without tussock forming. Our findings indicate that post-restoration management require carefully designed actions that are fine-tuned addressing specific threats at the site level.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal for Nature Conservation. - 20 : 1 (2012), p. 41-48. -
További szerzők:Miglécz Tamás (1986-) (biológus ökológus) Valkó Orsolya (1985-) (biológus) Kelemen András (1986-) (biológus-ökológus) Deák Balázs (1978-) (biológus) Lengyel Szabolcs (1971-) (biológus) Tóthmérész Béla (1960-) (ökológus)
Pályázati támogatás:LIFE04NAT/HU/000119
egyéb
OTKA NN F78887
OTKA
TÁMOP 4.2.1./B-09/1/KONV-2010-0007
TÁMOP
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7.

001-es BibID:BIBFORM080179
Első szerző:Tőzsér Dávid (környezetkutató)
Cím:Remediation potential of early successional pioneer species Chenopodium album and Tripleurospermum inodorum / Tőzsér Dávid, Tóthmérész Béla, Harangi Sándor, Baranyai Edina, Lakatos Gyula, Fülöp Zoltán, Simon Edina
Dátum:2019
ISSN:1314-6947 1314-3301
Megjegyzések:Remediation with plants is a technology used to decrease soil or water contamination. In this study we assessed the remediation potential of two weed species (Chenopodium album and Tripleurospermum inodorum) in a moderately metal-contaminated area. Metal concentrations were studied in roots, stems and leaves, in order to assess correlations in metal concentrations between those in soil and plants. Furthermore, we calculated bioaccumulation factor (BAF), bioconcentration factor (BCF) and translocation factor (TF) values to study the accumulation of metals from soil to plants and translocation within plants. We found correlation in metal concentrations between soil and plants. The metal accumulation potential was low in both species, indicating low BAF and BCF values. In contrast, high TF values were found for Mn, Ni, Sr, Zn, Ba, Fe, Cu and Pb in C. album, and for Fe, Mn, Ni, Zn and Sr in T. inodorum. Our results demonstrated that the potential of C. album and T. inodorum might be limited in phytoextraction processes; however, when accumulated, metals are successfully transported to aboveground plant organs. Thus, to achieve the efficient remediation of metal-contaminated soils, removal of the aboveground plant organs is recommended, by which soil disturbance can also be avoided.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
bioaccumulation
trace elements
phytoextraction
pollution
translocation
Megjelenés:Nature Conservation-Bulgaria. - 36 (2019), p. 47-69. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Harangi Sándor (1987-) (vegyész) Baranyai Edina (1987-) (környezetkutató) Lakatos Gyula (1949-) (ökológus) Fülöp Zoltán (1988-) Simon Edina (1981-) (ökológus)
Pályázati támogatás:K 116639
OTKA
KH 126481
OTKA
KH 126477
OTKA
NTP-NFTÖ-17
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8.

001-es BibID:BIBFORM071721
Első szerző:Valkó Orsolya (biológus)
Cím:Cultural heritage and biodiversity conservation - plant introduction and practical restoration on ancient burial mounds / Valkó Orsolya, Tóth Katalin, Kelemen András, Miglécz Tamás, Radócz Szilvia, Sonkoly Judit, Tóthmérész Béla, Török Péter, Deák Balázs
Dátum:2018
ISSN:1314-6947 1314-3301
Megjegyzések:Linking the conservation of cultural heritage and natural values provides a unique opportunity for preserving traditional landscapes and receives an increased awareness from stakeholders and society. Ancientburial mounds are proper objects of such projects as they are iconic landscape elements of the Eurasiansteppes and often act as refugia for grassland specialist species. The aim of this project was to reintroducegrassland plant species to burial mounds for representing them as cultural monuments with the associatedbiodiversity for the public. The effectiveness of seed sowing, transplanting greenhouse-grown plantsand individuals from threatened populations on burial mounds in Hortobágy National Park, Hungarywas tested. The following questions were answered: (1) which method is the most effective for speciesintroduction? (2) which species can establish most successfully? (3) how does management affect thespecies establishment rates? It was found advisable to use a combination of seed sowing and transplantinggreenhouse-grown plants. Sowing was found as a cost-effective method for introducing large-seededspecies, whilst introduction of greenhouse-grown transplants warranted higher establishment rates for alarger set of species. Transplanting adult individuals was more reliable regardless of management regimes,however this method is labour-intensive and expensive. Intensive management, like mowing with heavymachinery and intensive grazing, should be avoided in the first few years after introduction. The authors highlighted the fact that introducing characteristic grassland species on cultural monuments offers a greatopportunity to link issues of landscape and biodiversity conservation. This project demonstrated that, bythe revitalisation of cultural monuments, cultural ecosystem services can also be restored.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
cultural ecosystem services
endangered species
grassland restoration
landscape conservation
landscape element
reintroduction
Megjelenés:Nature Conservation. - 24 (2018), p. 65-80. -
További szerzők:Tóth Katalin (1988-) (biológus) Kelemen András (1986-) (biológus-ökológus) Miglécz Tamás (1986-) (biológus ökológus) Radócz Szilvia (1988-) (biológus) Sonkoly Judit (1989-) (biológus) Tóthmérész Béla (1960-) (ökológus) Török Péter (1979-) (biológus-ökológus) Deák Balázs (1978-) (biológus)
Pályázati támogatás:OTKA-111807
OTKA
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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