| 1. |
- Berglund, Hilda-Linn, et al.
(författare)
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Sampling of flower-visiting insects : Poor correspondence between the catches of colour pan-trap and sweep netting
- 2019
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Ingår i: European Journal of Entomology. - Ceske Budejovice, Czech Republic : Akademie Ved Ceske Republiky * Entomologicky Ustav. - 1210-5759 .- 1802-8829. ; 116, s. 425-431
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Tidskriftsartikel (refereegranskat)abstract
- Pollinating insects are important and therefore, it is important to be able to assess and monitor changes in their abundance. Consequently, it is essential that the methods used to collect data have some level of precision and are accurate. In the present study, two commonly used methods: colour pan-traps and sweep netting along transects, were compared. A total of 1775 specimens of 120 species of four insect families were caught in twelve clear-cuts in southern Sweden. Overall, Lepturinae (Cerambycidae; 5 species) and Cetoniidae (Scarabaeidae; 2) were trapped in larger numbers by pan-traps and Syrphidae (62) and Apoidea, both social (10) and solitary (41), by sweep netting. The catches of none of the above groups of insects by the two methods were correlated. These results show that the composition of catches of the two methods are very different, which has implications when choosing a method for sampling or monitoring and comparing and analysing published data.
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| 2. |
- Carpaneto, Giuseppe M., et al.
(författare)
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Biological and distributional overview of the genus Eledonoprius (Coleoptera: Tenebrionidae)mology : Rare fungus-feeding beetles of European old-growth forests
- 2013
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Ingår i: European Journal of Entomology. - 1210-5759 .- 1802-8829. ; 110:1, s. 173-176
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Tidskriftsartikel (refereegranskat)abstract
- All the information on the genus Eledonoprius was gathered to provide an up to-date overview of the geographical distribution and ecology of its species, and to assess their association with old-growth forests. Based on recent samples collected in deciduous forests and woodlands of Italy, the authors outline the habitats of these rare species and give an account of their trophic relations with bracket fungi. E. armatus is recorded in Central Italy and Sardinia for the first time; E. serrifrons is new to Basilicata (Southern Italy) and Syria.
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| 3. |
- Davydenko, Kateryna, et al.
(författare)
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Fungi associated with Ips acuminatus (Coleoptera: Curculionidae) in Ukraine with a special emphasis on pathogenicity of ophiostomatoid species
- 2017
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Ingår i: European Journal of Entomology. - : Biology Centre, AS CR. - 1802-8829 .- 1210-5759. ; 114, s. 77-85
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Tidskriftsartikel (refereegranskat)abstract
- Conifer bark beetles are well known to be associated with fungal complexes, which consist of pathogenic ophiostomatoid fungi as well as obligate saprotroph species. However, there is little information on fungi associated with Ips acuminatus in central and eastern Europe. The aim of the study was to investigate the composition of the fungal communities associated with the pine engraver beetle, I. acuminatus, in the forest-steppe zone in Ukraine and to evaluate the pathogenicity of six associated ophiostomatoid species by inoculating three-year-old Scots pine seedlings with these fungi. In total, 384 adult beetles were collected from under the bark of declining and dead Scots pine trees at two different sites. Fungal culturing from 192 beetles resulted in 447 cultures and direct sequencing of ITS rRNA from 192 beetles in 496 high-quality sequences. Identification of the above revealed that the overall fungal community was composed of 60 species. Among these, the most common were Entomocorticium sp. (24.5%), Diplodia pinea (24.0%), Ophiostoma ips (16.7%), Sydowia polyspora (15.1%), Graphilbum cf rectangulosporium (15.1%), Ophiostoma minus (13.8%) and Cladosporium pini-ponderosae (13.0%). Pathogenicity tests were done using six species of ophiostomatoid fungi, which were inoculated into Scots pine seedlings. All ophiostomatoid fungi tested successfully infected seedlings of Scots pine with varying degrees of virulence. Ophiostoma minus was the only fungus that caused dieback in inoculated seedlings. It is concluded that I. acuminatus vectors a species-rich fungal community including pathogens such as D. pinea and O. minus. The fungal community reported in the present study is different from that reported in other regions of Europe. Pathogenicity tests showed that O. minus was the most virulent causing dieback in seedlings of Scots pine, while other fungi tested appeared to be only slightly pathogenic or completely non-pathogenic.
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| 4. |
- Davydenko, Kateryna, et al.
(författare)
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Fungi associated with the red-haired bark beetle, Hylurgus ligniperda (Coleoptera: Curculionidae) in the forest-steppe zone in eastern Ukraine
- 2014
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Ingår i: European Journal of Entomology. - : Biology Centre, AS CR. - 1210-5759 .- 1802-8829. ; 111, s. 561-565
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to investigate the composition of the fungal community associated with the red-haired bark beetle (Hylurgus ligniperda Fabricius) in two plantations of Pinus sylvestris L. located in the Kharkiv and Luhansk regions (ca. 250 km apart) in the forest-steppe zone in eastern Ukraine. In each plantation, 48 beetles were collected from butts of living trees and 48 beetles from stems of fallen trees, i.e., a total of 96. Half of the beetles from each site were used for culturing fungi and the other half for direct sequencing the internal transcribed spacer of fungal ribosomal RNA (ITS rRNA). Thirty distinct fungal taxa were identified by culturing and 31 by direct sequencing. When pooled, there were 40 fungal taxa among which Ophiostoma piceae (Munch) Sydow & P. Sydow (10.3%), Alternaria alternata (Fries) Keissler (9.7%), Ogataea neopini Nagatsuka, S. Saito & Sugiyama (8.0%), Botryotinia fuckeliana (de Bary) Whetzel (5.1%), Cladosporium sp. Link (5.1%) and Sydowia polyspora (Brefeld & Tavel) E. Muller (4.6%) were the most common. Species of the genus Ophiostoma were the most abundant and included five different taxa O. piceae, O. bicolor R.W. Davidson & D.E. Wells, O. ips (Rumbold) Nannfeldt, O. canum (Muller) Sydow & P. Sydow and O. rectangulosporium Ohtaka, Masuya & Yamaoka, all of which are known to be at most weak pathogens of trees. The plant pathogen Botryotinia fuckeliana and insect pathogens Isaria farinose (Holmskjold) Fries and Beauveria bassiana (Balsamo-Crivelli) Vuillemin were also detected. Basidiomycetes were rare, among which three wood-decaying fungi Bjerkandera adusta (Willdenow) P. Karsten, Fomitopsis pinicola (Swartz) P. Karsten and Heterobasidion annosum (Fries) Brefeld were detected. In conclusion, in the forest-steppe zone in eastern Ukraine H. ligniperda is a vector of diverse communities of fungi the majority of which, if at all, are only weak pathogens of trees.
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| 5. |
- Forshage, Mattias, et al.
(författare)
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The identity of figitid parasitoids (Hymenoptera: Cynipoidea: Figitidae) of anthomyiid flies in conifer cones
- 2018
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Ingår i: European Journal of Entomology. - : Biology Centre, AS CR. - 1210-5759 .- 1802-8829. ; 115, s. 104-111
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Tidskriftsartikel (refereegranskat)abstract
- Larvae of Strobilomyia flies (Diptera: Anthomyiidae) are serious pests in conifer-seed orchards because they feed on the seed inside the cones. Figitid parasitoids (Hymenoptera: Cynipoidea) of Strobilomyia larvae in conifer cones are commonly reported but under various generic names. It is argued here that, across the entire Holarctic region, these figitids belong to Amphithectus and perhaps also to Sarothrus (Figitinae), but not to Melanips (Aspicerinae), contrary to some reports. We conclude that the identity of the commonly found figitid associated with conifer cones (Larix and Picea) in Europe and Asia is Amphithectus austriacus (Tavares, 1928) comb. n. This is most likely considering the original description and the host association, although the type specimen of Seitneria austriaca Tavares, 1928 is lost. This species name takes priority over the recently described Amphithectus coriaceus Paretas-Martinez & Pujade-Villar, 2013. Seitneria Tavares, 1928 becomes a new junior synonym of Amphithectus Hartig, 1840, and Amphithectus coriaceus Paretas-Martinez & Pujade-Villar, 2013 becomes a new synonym of Amphithectus austriacus (Tavares, 1928) comb. n.
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| 6. |
- Karpestam, Einat, et al.
(författare)
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Stable isotopes reveal dietary divergence between dispersal phenotypes in Tetrix subulata pygmy grasshoppers (Orthoptera: Tetrigidae)
- 2013
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Ingår i: European Journal of Entomology. - : Biology Centre, AS CR. - 1210-5759 .- 1802-8829. ; 110:1, s. 65-70
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Tidskriftsartikel (refereegranskat)abstract
- In some species of insects, individuals with fully developed wings and capable of flying coexist with flightless individuals that lack functional wings. Their diets may differ if long-winged individuals are more mobile and therefore likely to be better at finding and utilizing high quality food resources, or if they have different food preferences or physiological requirements. Despite its potential importance, differences in the diet of dispersal phenotypes have not been unequivocally demonstrated under natural conditions. To test for dietary divergence, we compared natural abundances of carbon and nitrogen stable isotope ratios (d13C and d15N) in long- and short-winged free ranging Tetrix subulata pygmy grasshoppers collected as adults from two natural populations. Overall, this comparison of stable isotopes indicated long-term differences in the diet of the two wing morphs in both populations, but not between males and females of the same morph. We conclude that it is likely that the dietary niches of the long winged and flightless individuals differ under natural conditions. This may reduce intra-specific competition, offset the expected trade-off between flight capacity and reproduction and promote ecological speciation.
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| 7. |
- Low, Matthew, et al.
(författare)
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Influence of linear versus network corridors on the movement and dispersal of the bush-cricket Metrioptera roeseli (Orthoptera: Tettigoniidae) in an experimental landscape
- 2013
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Ingår i: European Journal of Entomology. - : Biology Centre, AS CR. - 1210-5759 .- 1802-8829. ; 110, s. 81-86
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Tidskriftsartikel (refereegranskat)abstract
- Linear landscape elements are generally considered beneficial for promoting the movements of species between isolated habitats. However, relatively little consideration has been given to the effect of interconnections (nodes) between these elements: e.g. a simple linear element offers limited options for movement, whereas a network of such structures provides an exponential increase in potential pathways. In this pilot study we compared two experimental landscapes (single versus a lattice of four interconnected linear elements) in terms of their effect on the movement of males of Roesel's bush-cricket (Metrioptera roeseli) (Orthoptera: Tettigoniidae). Emigration of released bush-crickets from experimental landscapes was greater if there was a single rather than a lattice of linear elements (corridors). In the landscape with a lattice of corridors, 50% of the bush-crickets changed their direction of movement at nodes at least once. There was also evidence that nodes were attractive to bush-crickets; a higher proportion of individuals were found in and around nodes than in adjoining corridors, with the strength of this effect (i.e. aggregation at nodes) increasing with time. Thus nodes may not only affect the direction of movement but may also act as a local attractant. These effects may have an important role in the movement of species and their success in colonizing fragmented landscapes. These results indicate that in future landscape planning more consideration should be given to the connectivity between linear landscape elements as it is likely to be important in determining the movement and distribution of species.
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| 8. |
- Lundhagen, Anna, et al.
(författare)
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A little further south: Host range and genetics of the Northern pine processionary moth, Thaumetopoea pinivora (Lepidoptera: Notodontidae) at the southern edge of its distribution
- 2016
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Ingår i: European Journal of Entomology. - : Biology Centre, AS CR. - 1802-8829 .- 1210-5759. ; 113, s. 200-206
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Tidskriftsartikel (refereegranskat)abstract
- The Northern pine processionary moth, Thaumetopoea pinivora (Treitschke, 1834) shows a highly scattered distribution with fragmented populations across Europe. A previous study exploring the postglacial history of T. pinivora defined it as a cold-tolerant relict species and concluded that a progressive reduction of suitable habitats after the postglacial expansion from refugia in the southern Iberian peninsula best explained the distribution and genetic structure of populations of this species. However, recent records, both by us and others, challenge this view. Surprisingly, some of the newly found populations from southern Spain use black pine, Pinus nigra J.F. Arnold as a host plant despite the fact that the typical host of the species, Scots pine, Pinus sylvestris L. occurs in the area. We provide genetic data for one of these recently found southern populations where the larvae feed on P. nigra, and compare this with previously published data on individuals collected on P. sylvestris. This data reveals that populations from different host trees are no more genetically differentiated than populations sharing the same host plant. The findings of a wider diet breadth open the way to widen the search for the still unidentified glacial refugium of T. pinivora, and as such may contribute to a better understanding about how the species has spread across Europe.
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| 9. |
- Milberg, Per, et al.
(författare)
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Assemblages of flower-visiting insects in clear-cuts are rich and dynamic
- 2021
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Ingår i: European Journal of Entomology. - : Akademie Ved Ceske Republiky Entomologicky Ustav,Czech Academy of Sciences, Institute of Entomology. - 1210-5759 .- 1802-8829. ; 118, s. 182-191
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Tidskriftsartikel (refereegranskat)abstract
- Clear-cuts in production forests provide an open, sunny environment, with an abundance of nectar, as well as exposed soil and woody debris. This makes them a potential habitat for several groups of insects that typically use open habitats like grassland, including those species that visit flowers. In the current study, we used colour pan traps to catch flower-visiting species. Study sites were selected according to age (2-8 yrs since clear-cut) and land-use history (forest or meadow 150 yrs ago). We caught and identified solitary bees (395 specimens belonging to 59 species), social bees (831/16), other Hymenoptera (367/66), Syrphidae (256/31), and beetles (Lepturinae & Cetoniinae; 11,409/12). Age of the clear-cut strongly affected species composition as well as several groups and species, with most species caught mainly in the younger clear-cuts. Flower abundance statistically affected several groups and species, but inferring causation is difficult due to the flower-richness bias in pan trap catches. Bare soil and woody debris were important for the insect assemblage sampled, while bare rock was not. Although the majority of the insects caught were forest species, about one third of the species were associated with open, agricultural sites and hence seem to be able to locate and exploit resources in clear-cuts.
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| 10. |
- Milberg, Per, et al.
(författare)
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Using citizen science data to compare flight phenology of two oligolectic bees (Hymenoptera: Andrenidae) with the flowering of their host plants
- 2024
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Ingår i: European Journal of Entomology. - : CZECH ACAD SCI, INST ENTOMOLOGY. - 1210-5759 .- 1802-8829. ; 121, s. 67-72
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Tidskriftsartikel (refereegranskat)abstract
- Understanding the relationship between solitary bee flight and flowering phenology is globally relevant for environmental management and habitat restoration. Using Swedish citizen science data over an 11 -year period, the fl ight behaviours of two oligolectic solitary bees (Andrena hattorfiana and Andrena marginata) were compared to the flowering phenology of their hosts (Knautia arvensis and Succisa pratensis) in southern Sweden. There were 2,327 and 4,566 records of fl ight and fl owering, respectively. While associative studies cannot resolve the degree of oligolecty, a strong temporal association of Andrena hattorfiana with Knautia arvensis and Andrena marginata with Succisa pratensis was indicated. Three conclusions emerged when comparing annual data: first, the flight period of both bee species studied overlapped with the flowering period of their corresponding host plants. Second, earlier fl owering of Knautia arvensis corresponded with the earlier fl ight of Andrena hattorfiana. Third, the fl ight period duration was unaffected by the flowering period duration. For Andrena hattorfiana/Knautia arvensis, climate change may shift the start of fl ight and fl owering periods to earlier dates in the year. A similar response would be expected for Andrena marginata/Knautia arvensis, but not for Andrena marginata/Succisa pratensis where there instead might be an increasing mismatch between the fl ight and fl owering periods.
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