Ground Beetles as Predators of Oilseed Rape Pests: Incidence, Spatio-Temporal Distributions and Feeding

Williams, I. H.; Ferguson, A. W.; Kruus, Märt; Veromann, Eve; Warner, Douglas

doi:10.1007/978-90-481-3983-5_4

Cited by 20 publications

(20 citation statements)

References 71 publications

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“…The other plot-level factors explaining variations in species composition vary strongly between taxa. SOM is known to play a key role in the storage and provision of nutrients for plant growth and could in turn favor carabids by promoting a greater diversity of shelter and food resources or the buffering of extreme microclimatic conditions (Thiele, 1977;Williams et al, 2010). Nonetheless, SOM did not appear to strongly affect the composition in any of the three insect taxa in our study.…”

Section: Discussioncontrasting

confidence: 47%

Environmental factors acting at multiple scales determine assemblages of insects and plants in agricultural mountain landscapes of northern China

Duan

Liu

et al. 2016

Agriculture, Ecosystems & Environment

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Mountainous regions harbor high levels of biodiversity, while often experiencing substantial pressure from agricultural production. Our current understanding of factors driving changes in the highly diverse species assemblages of these regions is generally limited. We used variance partitioning based on redundancy analysis to establish the effects of environmental variables on the species composition of vascular plants and three insect taxa (Geometridae, Arctiinae and Carabidae). These environmental determinants are linked to three distinct spatial levels: the regional level-the four study regions positioned at~400m altitudinal intervals, the landscape level-the landscape structure in the vicinity of each study plot, and the plot level-the environmental conditions at individual sampling locations. Our results showed that variations in the species composition of vascular plants and carabids were more closely linked to plot-level characteristics than to regional-level factors, while the opposite trend was observed for the two moth taxa. When effects explicitly linked to the four study regions were controlled, plant and carabid assemblages showed strong links to the percentage of semi-natural habitat at the landscape level, while geometrid and arctiinid assemblages were affected primarily by the overall plant species richness and plant coverage at the plot level. Overall, the variations in the species composition of different taxa can be explained by varying sets of environmental variables acting at different spatial scales, and the relative role of these variables is highly taxon-specific. Regional-scale approaches are crucial for biodiversity conservation in mountainous agricultural landscapes, as exemplified by the responses in the two moths taxa, while a high proportion of semi-natural habitats in the agricultural landscape is not only linked to a diverse vegetation, but 3 also to species-rich carabid assemblages.

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Section: Discussioncontrasting

confidence: 47%

Environmental factors acting at multiple scales determine assemblages of insects and plants in agricultural mountain landscapes of northern China

Duan

Liu

et al. 2016

Agriculture, Ecosystems & Environment

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“…In contradiction to previous studies [45][46][47], we found a greater activity density and diversity of ground beetles in tilled organic fields than in no-till conventional fields. The greater activity density and diversity of ground beetles in organic fields possibly enhances the biological control of weed seeds [48,49] and insect pests [50,51]. Compared to no-till conventional fields where crop residues may impede carabid movement; tillage in organic fields may affect the carabid activity positively by reducing crop residues and hence their capture rates could be higher [52].…”

Section: Discussionmentioning

confidence: 99%

Impacts of Dryland Farm Management Systems on Weeds and Ground Beetles (Carabidae) in the Northern Great Plains

Adhikari

Menalled

2018

Sustainability

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Farming systems act as ecological filters impacting cropland associated biodiversity; however, the extent of these effects is largely unknown in the drylands of the Northern Great Plains (NGP), a key conventional and organic crop production region. In this 3-year (2013-2015) on-farm study, we addressed this knowledge gap by assessing the effects of conventional and organic farming systems on weed and ground beetle (carabidae) communities. We observed 25 weed species in conventional and 44 in organic fields. Weed species richness and weed species evenness were 237% and 137% greater in organic fields than in conventional fields. We collected a total of 1520 beetle specimens, representing 28 species in conventional and 37 in organic fields. Beetle activity-density and species richness were 220% and 156% greater in organic fields than in conventional fields. Both weed and ground beetle communities differed between conventional and organic fields, indicating that farming systems act as distinct ecological filters. We conclude that, in the drylands of the NGP, adoption of organic farming enhances weed abundance which could have potential management challenges, but provide floral resources to the pollinators and parasitoids. Similarly, greater diversity of ground beetles could enhance conservation biological control of crop pests, ultimately supporting for sustainable agriculture.

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“…For all analyses the pitfall trap samples of the same plot and pitfall trap design were pooled over all five sampling intervals to account for phenological shifts in the assemblages and reduce the influence of outliers ( Kotze et al, 2011 ; Williams et al, 2010 ).…”

Section: Methodsmentioning

confidence: 99%

It’s a matter of design—how pitfall trap design affects trap samples and possible predictions

Boetzl

Ries

Schneider

et al. 2018

PeerJ

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BackgroundPitfall traps are commonly used to assess ground dwelling arthropod communities. The effects of different pitfall trap designs on the trapping outcome are poorly investigated however they might affect conclusions drawn from pitfall trap data greatly.MethodsWe tested four pitfall trap types which have been used in previous studies for their effectiveness: a simple type, a faster exchangeable type with an extended plastic rim plate and two types with guidance barriers (V- and X-shaped). About 20 traps were active for 10 weeks and emptied biweekly resulting in 100 trap samples.ResultsPitfall traps with guidance barriers were up to five times more effective than simple pitfall traps and trap samples resulted in more similar assemblage approximations. Pitfall traps with extended plastic rim plates did not only perform poorly but also resulted in distinct carabid assemblages with less individuals of small species and a larger variation.DiscussionDue to the obvious trait filtering and resulting altered assemblages, we suggest not to use pitfall traps with extended plastic rim plates. In comprehensive biodiversity inventories, a smaller number of pitfall traps with guidance barriers and a larger number of spatial replicates is of advantage, while due to comparability reasons, the use of simple pitfall traps will be recommended in most other cases.

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Ground Beetles as Predators of Oilseed Rape Pests: Incidence, Spatio-Temporal Distributions and Feeding

Cited by 20 publications

References 71 publications

Environmental factors acting at multiple scales determine assemblages of insects and plants in agricultural mountain landscapes of northern China

Environmental factors acting at multiple scales determine assemblages of insects and plants in agricultural mountain landscapes of northern China

Impacts of Dryland Farm Management Systems on Weeds and Ground Beetles (Carabidae) in the Northern Great Plains

It’s a matter of design—how pitfall trap design affects trap samples and possible predictions

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