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001-es BibID:BIBFORM075870
035-os BibID:(WoS)000454777600003 (Scopus)85055968526
Első szerző:Horváth Roland (biológus-ökológus)
Cím:Both local and landscape-level factors are important drivers in shaping ground-dwelling spider assemblages of sandy grasslands / Horváth Roland, Magura Tibor, Tóthmérész Béla, Eichardt János, Szinetár Csaba
Dátum:2019
ISSN:0960-3115
Megjegyzések:Earlier studies emphasized that landscape-level factors were essential in shaping arthropod assemblages of semi-natural grasslands. Recently, several studies demonstrated that local factors were more important than landscape-level factors. We examined the importance of several local and landscape-level factors on spider assemblages using pitfall traps from eight sandy grassland fragments between 2001 and 2003. We tested three hypotheses: (i) species richness decreases with grazing intensity; (ii) species richness increasing with fragment size; (iii) the higher isolation of fragments results in decreasing species richness. We found that species richness of spiders did not depend on the grazing intensity, but there were changes in species composition and abundance of species among the variously grazed fragments. Out of the other two studied local factors (fragment size, and the shape of fragment), only the fragment size was a significant predictor of the diversity of specialist spiders, since the number of these species increased significantly with fragment size. Out of the four investigated landscape-level factors (isolation, total area of croplands in the landscape, total area of forests in the landscape, and landscape diversity), only the isolation was a significant predictor influencing spider diversity. The total number of species, the number of generalist species and the number of hunting species increased significantly with the isolation of fragments. Our results suggest that both local and landscape-level factors are important drivers in maintaining spider diversity in sandy grasslands; therefore, these factors should be considered simultaneously during the restoration and/or management of grasslands.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Biodiversity And Conservation. - 28 : 2 (2019), p. 297-313. -
További szerzők:Magura Tibor (1969-) (ökológus) Tóthmérész Béla (1960-) (ökológus) Eichardt János Szinetár Csaba
Pályázati támogatás:K 116639
OTKA
NKFI KH 126477
Egyéb
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2.

001-es BibID:BIBFORM047008
Első szerző:Horváth Roland (biológus-ökológus)
Cím:Large and least isolated fragments preserve habitat specialist spiders best in dry sandy grasslands in Hungary / Roland Horváth, Tibor Magura, Csaba Szinetár, János Eichardt, Béla Tóthmérész
Dátum:2013
ISSN:0960-3115
Megjegyzések:The role of fragment size, isolation and habitat diversity in the conservation ofspider assemblages living in fragmented landscape were studied in dry sandy grasslands(East Hungary, Nyírség). Spiders were collected using pitfall traps at eight dry grasslandfragments from 2001 to 2009 from March to October fortnightly. We tested the rules ofisland biogeography, which suggest that the species richness increases with the size anddecreases with the isolation of fragments. The habitat diversity is an important factor forspecies richness, since large areas usually have more habitats; therefore, the number ofspecies may be higher in these areas. During the 9-year study period, altogether 10,544individuals belonging to 106 species were collected. Contradicting the classical theory, wefound a significant negative relationship between the total number of spider species and thegrassland size, while the ratio of sandy grassland specialist spider species increased withfragment size. The relationship between the ratio of generalist species and the fragmentsize was not significant. The overall species richness and the isolation of studied grasslandsdid not show a significant relationship. The ratio of sandy grassland specialist speciesdecreased, while the ratio of generalist species increased with the increasing of isolation.The habitat diversity did not show any effect on spider species richness. We concluded thatto conserve the habitat specialist species it is recommended to preserve the large and leastisolated grassland fragments, furthermore to increase the size of small fragments with therestoration of the adjacent croplands.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
Egészség- és Környezettudomány
Doktori iskola
Megjelenés:Biodiversity And Conservation. - 0 (2013), p. 0-0. -
További szerzők:Magura Tibor (1969-) (ökológus) Szinetár Csaba Eichardt János Tóthmérész Béla (1960-) (ökológus)
Pályázati támogatás:TÁMOP-4.2.1/B-09/1/KONV-2010-0007
TÁMOP
Kvantitatív ökológiai kutatások
TÁMOP-4.2.2/B-10/1-2010-0024
TÁMOP
Juhász-Nagy Pál Doktori Iskola
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3.

001-es BibID:BIBFORM087674
Első szerző:Magura Tibor (ökológus)
Cím:Diversity and composition of carabids during a forestry cycle / Magura Tibor, Tóthmérész Béla, Elek Zoltán
Dátum:2003
ISSN:0960-3115 1572-9710
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Biodiversity And Conservation. - 12 : 1 (2003), p. 73-85. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Elek Z.
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4.

001-es BibID:BIBFORM087285
Első szerző:Magura Tibor (ökológus)
Cím:Forest edge and diversity: carabids along / Magura Tibor, Tóthmérész Béla, Molnár Tivadar
Dátum:2001
ISSN:0960-3115 1572-9710
Megjegyzések:Diversity relationships of carabids in forest edges and the neighbouring forest interior and the surrounding grassland are studied. Samples were taken along three replicated forest-grassland transects using pitfall traps in the Aggtelek National Park in Hungary during 2 years. The study revealed significant edge effect on the carabids. The Shannon diversity of carabids were significantly higher in the forest edge and the grassland than in the forest interior. Carabids of the forest interior, forest edge and grassland can be separated from each other by ordinations, both on the species composition and abundance, suggesting that all three habitats have a distinct species assemblage. Moreover, indicator species analysis detected significant edge associated species; based on the specificity and fidelity of the carabids we have distinguished five groups of species: habitat generalists, grassland-associated species, forest generalists, forest specialists, and edge-associated species. Multiple linear regression analyses showed that relative air moisture, temperature of the ground and cover of the herbs are the most important factors determining the diversity of carabids along the transects. Our results show that the high diversity of carabids in forest edges is due to the edge-associated species and the presence of species characteristic to the adjacent habitats. The significance of forest edges in nature conservation, serving as a source habitat for dispersal processes, contributing to the recolonization of carabids after habitat destruction or other disturbance is emphasized.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
carabids
dispersal
diversity
edge effect
indicator species
source habitat
Megjelenés:Biodiversity And Conservation. - 10 : 2 (2001), p. 287-300. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Molnár Tivadar
Pályázati támogatás:OTKA T25888
OTKA
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5.

001-es BibID:BIBFORM085112
Első szerző:Magura Tibor (ökológus)
Cím:Impacts of Leaf-litter Addition on Carabids in a Conifer Plantation / Magura Tibor, Tóthmérész Béla, Elek Zoltán
Dátum:2005
ISSN:0960-3115 1572-9710
Megjegyzések:As a ?ne-scale, manipulative model experiment leaf litter was added in plots to increase habitat heterogeneity in a 50-year-old Norway spruce plantation, established after the clear-cutting of a native beech forest, during a 2-year period in the Hungarian Mountain Range. Pitfall trap catches of carabids from leaf-litter plots were compared with those from control plots to explore the effect of leaf-litter addition. Difference in the species composition was revealed by ordination; scores of the samples of the two plot types were signi?cantly separated along the ?rst MDS axis. The most numerous species (Pterostichus oblongopunctatus) was signi?cantly more abundant in the leaf-litter plots. However, there were no signi?cant differences for the other most frequently obtained species. Habitat generalist species were the most abundant, followed by forest generalists, then forest specialists, and there were some open habitat species. Enhanced habitat heterogeneity (leaf-litter addition) in homogeneous plantations in?uenced the spatial distribution and composition of carabids, through altered abiotic (lower ground temperature inthe leaf-litter plots) and biotic (more prey items) factors. Differencesinabundance,speciesrichnessandShannondiversitywerenotsigni?cantbetween the control and the manipulated plots, although carabidcatch was higher inthe leaf-litterplots during both years. Forestry practices to increase habitat heterogeneity should be considered to enhance biodiversity in managed forests.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Carabid beetles
Diversity
Environmental conditions
Habitat heterogeneity
Nature management
Megjelenés:Biodiversity And Conservation. - 14 : 2 (2005), p. 475-491. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Elek Z.
Pályázati támogatás:T32130
OTKA
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