Béla Tóthmérész

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Jari Niemelä28
D. Johan Kotze24
John Spence23
Lyubomir Penev23
Tibor Magura22
25Péter Török
25Tibor Magura
15Gábor Borics
13Roland Horváth
12Philippe Clergeau

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2017
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Forest edge and diversity: carabids along forest-grassland transects
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… (More)
Effects of urbanization on ground-dwelling spiders in forest patches, in Hungary
Effects of urbanization on ground-dwelling spiders (Araneae) were studied using pitfall traps along an urban-suburban–rural forest gradient in Debrecen (Hungary). We found that overall spider species richness was significantly higher in the urban sites compared to the suburban and rural ones. The increased diversity was due to the significantly more… (More)
Algal assemblage types of bog-lakes in Hungary and their relation to water chemistry, hydrological conditions and habitat diversity
Algal flora of 12 bog lakes was investigated during the period of March 1995 to August 1999 in Hungary. Of the 129 samples, 624 taxa of algae were identified. Species richness of individual samples ranged between 8 and 107 except the extraordinarily species rich Baláta-tó where 533 algal taxa were observed. Ordination of the samples resulted in five groups:… (More)
Statistical aspects of environmental risk assessment of GM plants for effects on non-target organisms.
Previous European guidance for environmental risk assessment of genetically modified plants emphasized the concepts of statistical power but provided no explicit requirements for the provision of statistical power analyses. Similarly, whilst the need for good experimental designs was stressed, no minimum guidelines were set for replication or sample sizes.… (More)
Biodiversity differences between managed and unmanaged forests: meta-analysis of species richness in Europe.
Past and present pressures on forest resources have led to a drastic decrease in the surface area of unmanaged forests in Europe. Changes in forest structure, composition, and dynamics inevitably lead to changes in the biodiversity of forest-dwelling species. The possible biodiversity gains and losses due to forest management (i.e., anthropogenic pressures… (More)
Impacts of Leaf-litter Addition on Carabids in a Conifer Plantation
As a fine-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… (More)
Changes in carabid beetle assemblages along an urbanisation gradient in the city of Debrecen, Hungary
Responses of carabid beetles (Coleoptera: Carabidae) to urbanisation were studied along an urban-suburban-rural gradient representing decreasing intensities of humandisturbance. Carabids were collected by pitfall trapping during their activity period in lowland oak forest patches in the city of Debrecen, Eastern Hungary. The average number of carabid… (More)
Functional groups of phytoplankton shaping diversity of shallow lake ecosystems
Phytoplankton of eutrophic shallow lakes are frequently dominated by one species or species of the same functional group, resulting in species-pure algal assemblages. Knowledge of the structure of these assemblages is essential to understand their functioning; therefore, species and functional diversity were investigated in five sub-types of eutrophic… (More)
The effects of ethylene glycol and ethanol on the body mass and elemental composition of insects collected with pitfall traps.
Insects often used as accumulation indicators of hazardous elements. Pitfall traps with ethylene glycol as trapping fluid are frequently used to collect insects. We studied the effect of glycol and preservation with ethanol on the elemental composition of hand collected firebugs. Control samples were stored in a freezer and the following treatments were… (More)
Diversity and composition of carabids during a forestry cycle
Carabids (Carabidae, Coleoptera) were studied for 2 yearsto explore changes in their diversity and composition during a forestry cycle inthe Hungarian Mountain Range. Native beech forest was clear-cut and replantedwith Norway spruce. Recently planted (5 years old), young (15years old), middle-aged (30 years old) and old spruceplantations (50 years old) were… (More)