The use of barrier‐connected pitfall trapping for sampling predatory beetles and spiders

Winder, Linton; Holland, John M.; Perry, J. N.; Woolley, Christopher; Alexander, Colin James

doi:10.1046/j.1570-7458.2001.00781.x

Cited by 33 publications

(25 citation statements)

References 12 publications

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“…On each sampling date, at each of the 256 sampling locations, 25 tillers of wheat were inspected and aphid numbers recorded. Beetle activity–density was measured at each sampling location using barrier‐connected pitfall trapping (Winder et al . 2001b).…”

Section: Methodsmentioning

confidence: 99%

Predatory activity and spatial pattern: the response of generalist carabids to their aphid prey

Winder

Alexander

Holland

et al. 2005

Journal of Animal Ecology

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Summary1. The spatial distribution of cereal aphids infesting a field of winter wheat during the population establishment, development and decline phases were studied using a field-scale grid of sampling locations. 2. The distribution of two generalist predators, Pterostichus melanarius and P. madidus , were sampled contemporaneously. 3. Using spatial analysis by distance indices (SADIE), spatial pattern in the aphid population, predator activity-density, predator hunger and aphid predation was detected and mapped. 4. We tested the hypothesis that carabids and aphids were spatially associated with one another through predation. Aphid predation by individual beetles was detected using enzyme-linked immunosorbent assays (ELISA) and hunger was assessed by measurement of foregut weights. 5. Initially, there was a strong spatial dissociation between aphids and P. melanarius activity-density. While the aphid population was increasing there was a strong spatial association between aphids and both P. melanarius and P. madidus activity-density. During aphid population decline there was no measurable association between aphids and predatory activity-density. 6. Predation of aphids was strongly locally associated with predator activity-density on all sample dates for both predator species, regardless of the association with aphid spatial pattern. 7. Areas within the field most isolated from P. melanarius predation had the highest rates of aphid population increase. 8. Although the proportion of P. melanarius individuals consuming aphids was much lower compared to P. madidus , it was concluded that it was a more effective biological control agent due to its comparative abundance.

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Section: Methodsmentioning

confidence: 99%

Predatory activity and spatial pattern: the response of generalist carabids to their aphid prey

Winder

Alexander

Holland

et al. 2005

Journal of Animal Ecology

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“…Traps were partly filled with 30% alcohol and detergent. We placed two 30 cm long plastic guides (-o-) per trap to increase carabid catches (Winder et al, 2001), and covered the traps with flat stones to prevent the traps from filling up with rain water and leaves. Beetles were collected over their whole activity period from April to October 2002, by keeping the traps open for 12-15 days each month.…”

Section: Sampling Methodsmentioning

confidence: 99%

Carabid beetle occurrence at the edges of oak and beech forests in NW Spain

Taboada¹,

Kotze²,

Salgado³

2004

Eur. J. Entomol.

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Abstract. We examined the occurrence of carabid beetles (Coleoptera, Carabidae) at the edges of oak (Quercus pyrenaica) and beech (Fagus sylvatica) forests in León, NW Spain. Pitfall traps were used to collect beetles from April to October 2002, and leaf litter cover and depth were measured. Traps were placed at three distances (0, 50 and 100 m) from the edges of eight forest patches. A total of 5436 carabids belonging to 43 species were collected. We found no statistically significant edge effect at the carabid assemblage level, i.e. the number of species and individuals was not higher at the edge compared to the forest interior. However, individual species were affected by distance from the edge. Five of the 14 species analysed responded predictably to the edge, three of them statistically significantly so. Four species did not respond in the predicted direction, two of them statistically significantly so. We found a considerable difference between forest types in terms of carabid assemblage composition and response to the edge. Oak forests were species richer and beech forests had a higher number of individuals. These differences were probably due to smallscale habitat heterogeneity in the oak forest patches, caused by man, and the homogeneous structure of beech forests. Leaf litter appeared to be one possible factor influencing the distribution of some species from the interior to the edge of forests.

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“…Two white plastic guide panels 1.2 m long and 0.10 m high were placed at ground level in a crossdesign over the central trap. Guide panels were used to increase trap catch by channelling ground-dwelling arthropods towards the central collecting cup (Winder et al, 2001). A 70% monoethylene glycol (antifreeze) solution was used as a preservative and changed at approximately monthly intervals.…”

Section: Experimental Designmentioning

confidence: 99%

Native forest generalists dominate carabid assemblages along a stand age chronosequence in an exotic Pinus radiata plantation

Pawson

Brockerhoff

Didham

2009

Forest Ecology and Management

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The use of barrier‐connected pitfall trapping for sampling predatory beetles and spiders

Cited by 33 publications

References 12 publications

Predatory activity and spatial pattern: the response of generalist carabids to their aphid prey

Predatory activity and spatial pattern: the response of generalist carabids to their aphid prey

Carabid beetle occurrence at the edges of oak and beech forests in NW Spain

Native forest generalists dominate carabid assemblages along a stand age chronosequence in an exotic Pinus radiata plantation

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