Efficiency of pitfall traps with funnels and/or roofs in capturing ground-dwelling arthropods

Császár, Péter; Torma, Attila; Gallé‐Szpisjak, Nikolett; Tölgyesi, Csaba; Gallé, Róbert

doi:10.14411/eje.2018.003

Cited by 35 publications

(25 citation statements)

References 48 publications

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“…Ground-dwelling spiders and ground beetles were sampled using funnel pitfall traps applied with a roof. Using this type of trap, the accidental catching of vertebrates can be avoided without a significant negative effect on the capture efficiency of ground beetles and spiders (Császár et al, 2018). Three traps per site were placed in a line, with an inter-trap distance of 15 m (Fig.…”

Section: Study Sites and Samplingmentioning

confidence: 99%

Species and functional diversity of arthropod assemblages (Araneae, Carabidae, Heteroptera and Orthoptera) in grazed and mown salt grasslands

Torma

Császár

Bozsó

et al. 2019

Agriculture, Ecosystems & Environment

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Grazing and mowing are widely applied management practices in semi-natural grasslands, which are one of the most important habitats for biodiversity conservation in Europe. Due to the decline in extensively grazing livestock numbers, an increasing area of formerly grazed grasslands has being used as mown grasslands. However, we have scarce information on how arthropod assemblages are influenced by mowing in formerly grazed pastures. We assessed the effects of mowing compared to grazing on the species richness, abundance and functional diversity of arthropods in three grassland complexes in Hungary. Since 2005, these salt grasslands have been divided into two management units: extensive grazing management has been continued in one part, while annual late cutting has been established in the other part. In each management unit five sites were sampled. Spiders and ground beetles were sampled using pitfall traps, orthopterans and true bugs were sampled using sweep nets twice before cutting in 2015. In total, the data relating to 12,576 adult individuals of 334 species were analysed using mixed-models. Plant-dwelling true bugs and orthopterans responded more sensitively to mowing than ground-dwelling spiders and ground beetles. Beside the general negative effect of mowing on the species richness and abundance of plant-dwelling arthropods, the shifts in the community weighted mean values of these assemblages suggested the importance of the body size, trophic behaviour and dispersal ability of species in the functional response of these assemblages to the different management regimes. Ground beetles and spiders were rather influenced by the differences in the moisture conditions and vegetation properties. Presumably, strong abiotic stressors such as drought can partly override management effects on ground-dwelling arthropods. The effect of uniform and simultaneous biomass removal on large areas, and the direct mortality caused by mowing was the most disadvantageous for plant-dwelling arthropods. Based on our results, traditional management practices should be prioritized in grassland conservation, as alternative management practices might be less effective in preserving grassland biodiversity.

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Section: Study Sites and Samplingmentioning

confidence: 99%

Species and functional diversity of arthropod assemblages (Araneae, Carabidae, Heteroptera and Orthoptera) in grazed and mown salt grasslands

Torma

Császár

Bozsó

et al. 2019

Agriculture, Ecosystems & Environment

Self Cite

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“…Pitfall traps were used to sample litter‐dwelling spiders (Császár et al ., ). At each plot we placed eight pitfall traps at 10 m intervals along a line.…”

Section: Methodsmentioning

confidence: 97%

The effect of canopy openness of European beech (Fagus sylvatica) forests on ground‐dwelling spider communities

Černecká

Mihál

Gajdoš

et al. 2019

Insect Conserv Diversity

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1. The composition of spider communities in forests is affected by habitat characteristics, such as canopy openness, vegetation cover or tree species diversity; therefore, we assume that the effect of canopy will differ among tree species.2. As research in European beech forests has not been conducted, we studied the effect of understory environmental characteristics associated with a gradient of overstory canopy openness in beech forest on ground-dwelling spider richness, abundance and guild composition in the Western Carpathians, Slovakia. Canopy openness, the cover of understory vegetation and litter, litter thickness and variability and soil reaction were recorded. In total, 17 332 individuals of 174 spider species were trapped during 518 days. We used Generalised Linear Models to explain the effect of environmental characteristics on the assemblages of ground-dwelling spiders; the unique and shared contributions of the predictors were calculated using variation partitioning.3. The association of canopy openness with spider species richness was hump-shaped and displayed positive linear relationship with abundance. Abundance was also affected by soil pH.4. The composition of spider communities was significantly affected by canopy openness and understory characteristics; a major part of this variation was shared between all variables. The guild composition of the assemblages interacted with canopy openness, as sheet-web weavers were dominant under the most closed canopy, that below 20% of canopy openness, while ground hunters dominated in the rest of the canopy gradient.5. The gradient of beech forest canopy openness affected spider species richness, abundance and guild composition and supported distinct assemblages.

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“…We used three pitfall traps for collecting spiders at each site. The traps were plastic cups with a diameter of 8.5 cm (Császár et al ., ). We supplied the traps with plastic funnels, and we placed a metal roof above them.…”

Section: Methodsmentioning

confidence: 97%

Forest type interacts with milkweed invasion to affect spider communities

Ingle

Gallé‐Szpisjak

Kaur

et al. 2019

Insect Conserv Diversity

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Non‐native tree plantations constitute a large part of forestation worldwide. Plantations are prone to invasion by exotic herbaceous plant species due to habitat properties, including understory vegetation structure. We established 40 sampling sites in 10 plantation forests. Sites were selected according to tree species (native poplar forests and exotic pine plantations) and common milkweed (Asclepias syriaca) density (invaded and non‐invaded sites) in a full factorial design. We collected spiders with pitfall traps. We found a significant effect of A. syriaca invasion on spider functional diversity (Rao's quadratic entropy), with invaded sites having a lower functional diversity than non‐invaded sites. A larger effect of invasion with A. syriaca on the RaoQ of spiders was observed in pine compared to poplar plantations. Spider species were larger, and web‐building spiders were more frequent in poplar forests than in pine plantations. We found no effect of A. syriaca invasion on species richness or abundance of spiders. Species composition of spider assemblages in the two forest types was clearly separated according to non‐metric multidimensional scaling. We identified seven species associated with pine plantations and six species associated with poplar plantations. The similar species richness and the higher functional diversity of non‐invaded sites suggested that these trait states were less similar than invaded sites and that functionally different species were present. In contrast, the invaded sites had lower functional diversities and thus more uniform trait state compositions, suggesting that environmental filtering played an important role in species sorting, making invaded plantations low‐quality secondary habitats for the original spider fauna.

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Efficiency of pitfall traps with funnels and/or roofs in capturing ground-dwelling arthropods

Cited by 35 publications

References 48 publications

Species and functional diversity of arthropod assemblages (Araneae, Carabidae, Heteroptera and Orthoptera) in grazed and mown salt grasslands

Species and functional diversity of arthropod assemblages (Araneae, Carabidae, Heteroptera and Orthoptera) in grazed and mown salt grasslands

The effect of canopy openness of European beech (Fagus sylvatica) forests on ground‐dwelling spider communities

Forest type interacts with milkweed invasion to affect spider communities

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