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001-es BibID:	BIBFORM087306
035-os BibID:	(Scopus)0034354138 (WoS)000088971600001
Első szerző:	Magura Tibor (ökológus)
Cím:	Spatial distribution of carabids along grass-forest transects / T. Magura, B. Tóthmérész, T. Molnár
Dátum:	2000
ISSN:	1217-8837
Megjegyzések:	Spatial distribution of ground-beetles and associations between carabids and environmental variables were studied in grass-forest transects in the Aggtelek National Park in Hungary. The carabid assemblages of the grass, the forest edge and the forest interior can be separated from each other by principal coordinates analysis, suggesting that all habitats have a characteristic and distinct species composition. The collected carabid species can be divided into five groups by indicator species analysis: (1) habitat generalists, (2) forest generalists, (3) species of the grass, (4) forest edge species, and (5) forest specialists. Distributions of the eighteen most frequent carabids were generally aggregated. There were significant correlations between the carabid abundance and the following abiotic factors: relative cover of the leaf litter, the herbs, the shrubs, and the canopy layer. Biotic factors, like the abundance of the carabids' prey, and the occurrence of other carabids cr,ere also correlated significantly with the distribution of particular species at the studied spatial scale. For the eighteen most frequent species we found 7 significant positive and 4 significant negative correlations of the abundance patterns. For two species (Molops piceus (PANZER, 1793) and Pterostichus burmeiseri HEER, 1841), which are of similar size, spatial pattern and seasonal activity, we found significant negative interaction suggesting interspecific competition between them. The results stress the importance of an integration of biotic and abiotic factors in carabid ecology, and also provide an empirical approach for understanding spatial distribution of carabids.
Tárgyszavak:	Természettudományok Matematika- és számítástudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk
Megjelenés:	Acta Zoologica Academiae Scientiarum Hungaricae. - 46 : 1 (2000), p. 1-17. -
További szerzők:	Tóthmérész Béla (1960-) (ökológus) Molnár Tivadar
Pályázati támogatás:	T 258888 OTKA T 32130 OTKA
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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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
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM004995
Első szerző:	Magura Tibor (ökológus)
Cím:	A species-level comparison of occurrence patterns in carabids along an urbanisation gradient / Tibor Magura, Béla Tóthmérész, Tivadar Molnár
Dátum:	2008
ISSN:	0169-2046
Megjegyzések:	The activity-density pattern of frequent carabid species was studied using pitfall traps in forest patches along an urbanisation gradient defined in terms of the ratio of the built-up area to the natural habitat. We predicted that the activity-density of the forest specialist carabid species should decrease from rural sites to the more altered urban ones. We also predicted, that there is no unique pattern for the generalist species, because the activity-density pattern is controlled by their autecological characteristics in a complex interaction with the environmental variables, and urbanisation/disturbance level. Moreover, we identified the environmental factors responsible for the observed variation in carabid activity-density. As predicted, the activity-density of two forest specialist species (Carabus convexus, Pterostichus oblongopunctatus) decreased significantly from rural sites to urban ones. The activity-density of the generalist species, Amara convexior, was higher in the heavily disturbed urban sites. The generalist species, Ophonus nitidulus, was significantly more abundant in the rural sites. The other five frequent generalist species (Notiophilus rufipes, Pterostichus melanarius, Harpalus luteicornis, Pterostichus niger, Stomis pumicatus) showed no significant changes in activity-density along the gradient. The two open-habitat species (Anisodactylus nemorivagus, Bembidion lampros) also showed no significant changes in activity-density along the gradient. Canonical correspondence analysis highlighted that the variation in the activity-density of the studied species was related to the following environmental factors: ground temperature, air temperature, relative humidity, leaf-litter cover, cover of decaying wood material, herbs, shrubs, and to the amount of prey items.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban Activity-density Forest specialist carabids Generalist species Open-habitat species Urbanisation
Megjelenés:	Landscape and Urban Planning. - 86 (2008), p. 134-140. -
További szerzők:	Tóthmérész Béla (1960-) (ökológus) Molnár Tivadar
Internet cím:	elektronikus változat elektronikus változat
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