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389 results for “Bark beetle”
Fig. 2 in The flat bark beetles (Coleoptera, Silvanidae, Cucujidae, Laemophloeidae) of Atlantic Canada
Fig. 2. Distribution of Dendrophagus cygnaei, Cucujus c. clavipes, Pediacus fuscus, Laemophloeus biguttatus, and Placonotus zimmermanni in Atlantic Canada. Inset map shows records from Labrador.
Figure 32 in Revision of the Bark Beetle Genera Within the Former Cryphalini (Curculionidae: Scolytinae)
Figure 32. Images of Acorthylus spp.: Dorsal and lateral photos of A) A. gracilis, B) A. pruni. Eye and antennae of C) A. pruni, and proventriculus of D) A. pruni.
Figure 6 in Revision of the Bark Beetle Genera Within the Former Cryphalini (Curculionidae: Scolytinae)
Figure 6. Phylogeny of Cryphalini, Coriacephilini, Xyloterini, and Trypophloeini, Part 1. Tree is made in RAxML, constrained to the tree by Johnson et al. (2018). Support values are not included due to artificial inflation by constraints.The constraint tree is indicated by a bold line. Outgroup taxa are omitted from the figure. Name pre- and post-revision are displayed, with changes marked in bold. Color boxes indicate genera.The type species of a genus is marked with underlined text.
Figure 5 in Revision of the Bark Beetle Genera Within the Former Cryphalini (Curculionidae: Scolytinae)
Figure 5. Labeled diagram of aedeagus with terminology.Top shows position of aedeagus in preserved beetles, middle shows aedeagus of Cryphalus asperatus, bottom shows aedeagus of Ernoporus tiliae. Sketches show A) spiculum gastrale, B) dorsal view, C) lateral view, and D) ventral view.
Figure 11 in Revision of the Bark Beetle Genera Within the Former Cryphalini (Curculionidae: Scolytinae)
Figure 11. Images of Cryphalus spp.: Dorsal and lateral photographs of A) C. ozopemoides, B) C. nr. piceus. Eye, antennae, and frons of C) C. kesiyae and D) C. mangiferae.
Supplementary material 1 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Tables S1–S3
Figure 6 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Figure 6 Leptographium alneum sp. nov. (CBS 144901) aDryocoetes alni-infested Populus tremula tree b galleries of D. alni with ascomata c ascoma d ascomatal base e ascospores f ostiolar hyphae g–i conidiophores, black arrow indicates barrel-shaped cells j conidiogenous k conidia l club-shape cells m fourteen-day-old culture on MEA. Scale bars: 50 μm (c), 25 μm (d), 10 μm (e), 10 μm (f), 25 μm (g), 25 μm (h), 50 μm (i), 10 μm (j), 10 μm (k), 50 μm (l).
Figure 5 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Figure 5 Ceratocystiopsis synnemata sp. nov. (NRIF 16918DA=KFL 16918DA) a, b micronematous conidiophores c–e macronematous conidiophores f, g conidiophores aggregate in synnematah conidia i fourteen-day-old culture on MEA. Scale bars: 25 μm (a), 10 μm (b), 25 μm (c–g), 10 μm (h).
Figure 4 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Figure 4 Phylogram obtained from Maximum Likelihood (ML) analyses of the combined datasets of ITS1-5.8S-ITS2-28S+ACT+TUB2+TEF1-α for selected species of Leptographiumsensu lato. Sequences obtained during this study are presented in bold type. The Bootstrap values ≥ 75% for ML and Maximum Parsimony (MP) analyses are presented at nodes as follows: ML/MP. Bold branches indicate posterior probabilities values ≥ 0.95 obtained from Bayesian Inference (BI) analyses. * Bootstrap values <75%. The tree is drawn to scale (see bar) with branch length measured in the number of substitutions per site. Leptographium flavum and L. vulnerum represents the outgroup in analyses of the combined datasets of ITS1-5.8S-ITS2-28S+ACT+TUB2+TEF1-α.
Figure 1 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Figure 1 Phylogram obtained from Maximum Likelihood (ML) analyses of the ITS1-5.8S-ITS2-28S data for the Ceratocystiopsis spp. Sequences obtained during this study are presented in bold type. The Bootstrap values ≥ 75% for ML and Maximum Parsimony (MP) analyses are presented at nodes as follows: ML/MP. Bold branches indicate posterior probabilities values ≥ 0.95 obtained from Bayesian Inference (BI) analyses. * Bootstrap values <75%. The tree is drawn to scale (see bar) with branch length measured in the number of substitutions per site. Ophiostoma karelicum and Ophiostoma quercus represent the outgroup.
Figure 3 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Figure 3 Phylogram obtained from Maximum Likelihood (ML) analyses of the ITS2-28S for selected species of Leptographiumsensu lato. Sequences obtained during this study are presented in bold type. The Bootstrap values ≥ 75% for ML and Maximum Parsimony (MP) analyses are presented at nodes as follows: ML/MP. Bold branches indicate posterior probabilities values ≥ 0.95 obtained from Bayesian Inference (BI) analyses. * Bootstrap values <75%. The tree is drawn to scale (see bar) with branch length measured in the number of substitutions per site. Ophiostoma karelicum and O. quercus represents the outgroup in analyses of ITS2-28S.
Figure 2 from: Strzałka B, Jankowiak R, Bilański P, Patel N, Hausner G, Linnakoski R, Solheim H (2020) Two new species of Ophiostomatales (Sordariomycetes) associated with the bark beetle Dryocoetes alni from Poland. MycoKeys 68: 23-48. https://doi.org/10.3897/mycokeys.68.50035
Figure 2 Phylogram obtained from Maximum Likelihood (ML) analyses of TUB2 data for the Ceratocystiopsis spp. Sequences obtained during this study are presented in bold type. The Bootstrap values ≥ 75% for ML and Maximum Parsimony (MP) analyses are presented at nodes as follows: ML/MP. Bold branches indicate posterior probabilities values ≥ 0.95 obtained from Bayesian Inference (BI) analyses. * Bootstrap values <75%. The tree is drawn to scale (see bar) with branch length measured in the number of substitutions per site.
Figure 2 from: Wermelinger B, Schneider Mathis D, Knížek M, Forster B (2020) Tracking the spread of the northern bark beetle (Ipsduplicatus [Sahlb.]) in Europe and first records from Switzerland and Liechtenstein. Alpine Entomology 4: 179-184. https://doi.org/10.3897/alpento.4.53808
Figure 2 Map of European countries, with the corresponding year of the first record of Ips duplicatus (* see Table 2 for dates in individual regions of Germany).
Figure 1 from: Wermelinger B, Schneider Mathis D, Knížek M, Forster B (2020) Tracking the spread of the northern bark beetle (Ipsduplicatus [Sahlb.]) in Europe and first records from Switzerland and Liechtenstein. Alpine Entomology 4: 179-184. https://doi.org/10.3897/alpento.4.53808
Figure 1 Lateral view of a male Ips duplicatus showing the characteristic spines 2 and 3 on its declivity (photo: G. Casciano, WSL).
Data from: Colonization of weakened trees by mass-attacking bark beetles: no penalty for pioneers, scattered initial distributions and final regular patterns
Bark beetles use aggregation pheromones to promote group foraging, thus increasing the chances of an individual to find a host and, when relevant, to overwhelm the defences of healthy trees. When a male beetle finds a suitable host, it releases pheromones that attract potential mates as well as other "spying" males, which results in aggregations on the new host. To date, most studies have been concerned with the use of aggregation pheromones by bark beetles to overcome the defences of living, well-protected trees. How insects behave when facing undefended or poorly defended hosts remains largely unknown. The spatio-temporal pattern of resource colonization by the European eight-toothed spruce bark beetle, Ips typographus, was quantified when weakly defended hosts (fallen trees) were attacked. In many of the replicates, colonization began with the insects rapidly scattering over the available surface and then randomly filling the gaps until a regular distribution was established, which resulted in a constant decrease in nearest-neighbour distances to a minimum below which attacks were not initiated. The scattered distribution of the first attacks suggested that the trees were only weakly defended. A minimal theoretical distance of 2.5 cm to the earlier settlers (corresponding to a density of 3.13 attacks/dm²) was calculated, but the attack density always remained lower, between 0.4 and 1.2 holes/dm², according to our observations.
Data from: Bark beetles attacking conifer seedlings: picking on the weakest or feasting upon the fittest?
1. Plant stress from causes such as drought is thought to increase the susceptibility of plants to herbivore attack and damage. Although this forms the basis of the widely cited plant stress hypothesis, there are few cases where this has been tested thoroughly. 2. We compared the frequency of attack and damage of an invasive pine bark beetle Hylates ater, on seedlings of Pinus radiata, using a 2×2 factorial design with artificially induced stress and insecticide application to distinguish effects of beetle attack and direct effects of stress. 3. Contrary to expectations based on the plant stress hypothesis, twice as many unstressed seedlings (22%) were attacked than stressed seedlings (11%). However, stressed seedlings were twice as likely to experience sustained bark beetle feeding resulting in girdling, than unstressed seedlings (31% and 15%, respectively). 4. In response to beetle attack, unstressed seedlings showed much stronger resin production than stressed seedlings, which is likely to explain the greater survival of unstressed seedlings after attack. 5. Experimental drought stress caused a 50% reduction in shoot growth. 6. Synthesis and applications. Maximising seedling vigour and minimising (pre-)planting stress are key for the resilience of planted forests. Managers should emphasise a stress-free transition of seedlings from nursery to field as well as correct planting techniques, in order to safeguard this vulnerable stage. This is particularly crucial since drought stress and insect invasions are likely to increase as a result of global change.
FIGURES 38–40. Tarsonemus bistridentati, larva paratype. 38,leg I in Two new species of Tars on em u s (Acari: Tarsonemidae) associated with bark beetles (Coleoptera: Scolytidae) from Crimea, Ukraine
FIGURES 38–40. Tarsonemus bistridentati, larva paratype. 38,leg I; 39, leg II; 40, leg III.
FIGURES 28–30. Tarsonemus bistridentati, male paratype. 28 in Two new species of Tars on em u s (Acari: Tarsonemidae) associated with bark beetles (Coleoptera: Scolytidae) from Crimea, Ukraine
FIGURES 28–30. Tarsonemus bistridentati, male paratype. 28, idiosoma; 29, gnathosoma dorsum;
FIGURES 11–14. Tarsonemus fraxini, male paratype. 11,leg I in Two new species of Tars on em u s (Acari: Tarsonemidae) associated with bark beetles (Coleoptera: Scolytidae) from Crimea, Ukraine
FIGURES 11–14. Tarsonemus fraxini, male paratype. 11,leg I; 12, leg II; 13, leg III; 14, leg IV.
FIGURES 4–7. Tarsonemus fraxini, female holotype. 4,leg I in Two new species of Tars on em u s (Acari: Tarsonemidae) associated with bark beetles (Coleoptera: Scolytidae) from Crimea, Ukraine
FIGURES 4–7. Tarsonemus fraxini, female holotype. 4,leg I; 5, leg II; 6, leg III; 7, leg IV.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.