Differentiation of spring carabid beetle assemblages between semi‐natural habitats and adjoining winter wheat

Anjum‐Zubair, Muhammad; Entling, Martin H.; Bruckner, Alexander; Drapela, Thomas; Frank, Thomas

doi:10.1111/afe.12115

Cited by 14 publications

(14 citation statements)

References 54 publications

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“…A higher functional diversity of plants in local habitats can promote carabid species richness in agricultural landscapes (Rouabah et al ., ), due to the presence of arable weeds that act as a resource or alter the microclimate (Diehl et al ., ). Compared to grassy field margins or conventionally managed arable fields, sown wildflower areas enhance carabid species richness (Anjum‐Zubair et al ., ). The observed importance of AES type over landscape characteristics for carabid species richness in our study is supported by limited effects of landscape complexity on carabids in previous studies (Winqvist et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Trade‐offs in arthropod conservation between productive and non‐productive agri‐environmental schemes along a landscape complexity gradient

Mader

Diehl

Fiedler

et al. 2017

Insect Conserv Diversity

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Productive and non‐productive agri‐environmental schemes (AES) were developed to support farmland biodiversity. This study compares arthropod predators between productive (organic farming) and non‐productive (sown flowering fields) AES along a landscape complexity gradient. We compared species richness, community composition and community weighted mean body sizes of 12 306 carabids and 4868 spiders in organically managed cereal fields and flowering fields along a landscape complexity gradient. These data were used to evaluate the conservation success of different AES types for a number of exclusive species, financial incentives and benefits for farmers. Carabids only responded to the AES type and their communities had higher species richness in flowering fields. Spider species richness increased with landscape complexity. Community composition differed between AES types for all predator groups, with the composition of ground‐dwelling spiders being additionally affected by landscape complexity. The mean body size of web‐building spiders decreased with landscape complexity and the mean body size of female spiders was larger in flowering fields. Both AES types can contribute to the conservation of predator communities. Species richness increased with non‐productive AES. Agrobiont species occurred more frequently in productive AES. The overall number of exclusive predator species was lower in flowering fields. We emphasise that there is an additive effect of establishing productive and non‐productive AES within the landscape, and a diverse mosaic of different AES types holds the greatest potential to provide a large regional species pool of arthropod predators, while simultaneously guaranteeing financial benefits for farmers from production and subsidies.

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Section: Discussionmentioning

confidence: 97%

Trade‐offs in arthropod conservation between productive and non‐productive agri‐environmental schemes along a landscape complexity gradient

Mader

Diehl

Fiedler

et al. 2017

Insect Conserv Diversity

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“…After assessing possible correlations between plant parameters, we found it appropriate to test plant parameters separately, since plant parameters were highly correlated and could not be used in a single GLM model. To test for significant associations of any individual bumblebee, heteropteran bug and grasshopper species with managed or abandoned meadows, we calculated the point-biserial correlation coefficient r pb for each species (Anjum-Zubair et al 2015). To investigate associations of bumblebee, heteropteran bug and grasshopper species with study sites, we computed the strength and significance of the association using the R-functions strassoc() and signassoc() in R (Rpackage "indicspecies" 1.7.5, De Cáceres and Jansen 2015).…”

Section: Discussionmentioning

confidence: 99%

“…To investigate associations of bumblebee, heteropteran bug and grasshopper species with study sites, we computed the strength and significance of the association using the R-functions strassoc() and signassoc() in R (Rpackage "indicspecies" 1.7.5, De Cáceres and Jansen 2015). We assessed the significance of the associations with two-sided permutation tests, and calculated confidence intervals by bootstrapping data 999 times with replacement, following Anjum-Zubair et al (2015).…”

Section: Discussionmentioning

confidence: 99%

Diversity of bumblebees, heteropteran bugs and grasshoppers maintained by both: abandonment and extensive management of mountain meadows in three regions across the Austrian and Swiss Alps

et al. 2017

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Context Abandonment of extensively managed meadows is an ongoing global challenge in recent decades, particularly in mountain regions, and directly affects plant diversity. However, the extent to which plant diversity further affects associated insect pollinators or herbivores is little investigated. Objectives We focused on the effects of abandonment of mountain meadows on species richness and assemblages of bumblebees, bugs and grasshoppers. Specifically, we investigated the influence of vegetation cover, flower cover, plant richness and surrounding landscape on the three insect groups.Methods Species richness, abundance and species assemblages of bumblebees, bugs and grasshoppers were surveyed in one Swiss and two Austrian regions: three meadows which had been abandoned for 15-60 years, and three extensively managed meadows (mown once a year, no use of fertilizers). We surveyed bumblebees and bugs by sweep net, and grasshoppers using the time-effective soundscape approach. Results Bumblebee species richness and abundance were significantly higher in managed meadows, whereas bug and grasshopper richness and abundance showed no differences between both management types. Managed and abandoned meadows harboured significantly different species assemblages of bugs and grasshoppers, but not of bumblebees. Increasing flower cover and plant richness increased bumblebee 123Landscape Ecol (2017) 32:1937-1951 DOI 10.1007 richness, but correlated negatively with richness of bugs. Surrounding open landscape positively affected bugs. Caelifera positively correlated with surrounding forest cover and negatively with vegetation cover. Vegetation cover positively affected Ensifera. Conclusions Abandoned and extensively managed meadows are important habitat types for the conservation of the three insect groups, thus suggesting the maintenance of both habitat types within mountain landscapes.

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“…Poecilus cupreus is known to utilise within-field areas for reproduction in spring and overwintering (Marrec et al, 2015), and thus this species can reach high activity densities in arable habitats. Anjum-Zubair et al (2015) observed higher activity densities of P. cupreus in cereal fields compared to adjacent sown wildflower areas. These previous studies therefore suggest that carabids can reach high densities in managed and productive agroecosystems.…”

Section: Numeric Responsementioning

confidence: 67%

“…This difference in anthropogenic disturbance did not result in higher activity densities in flowering fields, for example due to lower larval mortality influencing population dynamics (Lövei & Sunderland, 1996). Anjum-Zubair et al (2015) observed higher activity densities of P. cupreus in cereal fields compared to adjacent sown wildflower areas. da Silva et al, 2008), and that certain predaceous taxa may even benefit from intensively managed conventional compared to organic farming (Birkhofer et al, 2014).…”

Section: Numeric Responsementioning

confidence: 88%

Agri‐environmental schemes affect the trophic niche size and diet of common carabid species in agricultural landscapes

Mader

Diehl

Wolters

et al. 2018

Ecological Entomology

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1. Carabids are abundant in agroecosystems and provide biocontrol services by feeding on weed seeds and pests. We compare the effects of two fundamentally different agri-environmental schemes (AES) on the numeric and trophic responses of four common carabid species: Anchomenus dorsalis, Poecilus cupreus, Pseudoophonus rufipes and Pterostichus melanarius.2. In six cereal fields under organic farming and six sown flowering fields, 10 290 individuals of the four species were sampled to quantify their numeric response. The activity density of all species was higher in organically managed cereal fields compared to flowering fields.3. We analysed naturally occurring stable isotope ratios of carbon and nitrogen in 138 carabid individuals to quantify isotopic niches and the diet contribution of soilversus plant-based resources. Resources from the soil ('brown') energy channel were more important than resources from the plant ('green') energy channel in the diet of all species, particularly in P. melanarius.4. Isotopic niches were larger for P. rufipes and P. melanarius in flowering fields than in organically managed cereal fields. Moreover, differences between AES types were observed in the diet contribution derived from both energy channels: A. dorsalis and P. cupreus incorporated higher proportions of plant-based resources in organically managed cereal fields compared to flowering fields. 5. Similar numeric, but different trophic responses suggest that AES type may alter arthropod food webs beyond simple changes in carabid densities. Such 'hidden' modifications in the resource utilisation of generalist predators deserve more attention to adequately evaluate the ecological consequences of AES.

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Differentiation of spring carabid beetle assemblages between semi‐natural habitats and adjoining winter wheat

Cited by 14 publications

References 54 publications

Trade‐offs in arthropod conservation between productive and non‐productive agri‐environmental schemes along a landscape complexity gradient

Trade‐offs in arthropod conservation between productive and non‐productive agri‐environmental schemes along a landscape complexity gradient

Diversity of bumblebees, heteropteran bugs and grasshoppers maintained by both: abandonment and extensive management of mountain meadows in three regions across the Austrian and Swiss Alps

Agri‐environmental schemes affect the trophic niche size and diet of common carabid species in agricultural landscapes

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