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435 results for “Carabids”
Fig. 8 in Interpreting the condition of the forest environment with use of the SCP/MIB model of carabid communities (Coleoptera: Carabidae)
Fig. 8. The status of carabid communities living in different zones of the forest – fallow ecotone.
Fig. 1 in Standard deviation of carabid size in Western German forest succession - a complex picture
Fig. 1. Male (squares) and female (circles) elytrae lengths of C. violaceus (mean ± SD).
Fig. 1 in Distribution of carabid beetles in agroecosystems across spatial scales - A review
Fig. 1. Nested relations between the spatial levels (after Ettema, Wardle (2002), with changes).
Data from: Direct and indirect effects of landscape and field management intensity on carabids through trophic resources and weeds
<p>Carabids are important biological control agents of weeds and other pests in agricultural fields. The carabid community is built upon direct and indirect ecological effects of landscape complexity, field management intensity and biotic components that in interaction make any prediction of community size and composition challenging.</p> <p>We analyse a large-scale sample of 60 European cereal fields using Structural Equation Modelling to quantify the direct effects of field management intensity and the surrounding landscape, and their indirect effect via biotic components, on carabid diversity.</p> <p>Our results highlight that direct and indirect effects of increasing landscape complexity, mediated by trophic resources, mainly affect carabids positively. Field management intensity only ever affects carabids through indirect effects that are generally negative, by suppressing standing weeds and weed seeds.</p> <p>Indirect effects on granivore carabid species depended on weed seed availability whereas omnivores depended on the availability of both weed seeds and animal prey.</p> <p><i>Synthesis and applications</i><span>: A consideration of both the direct and indirect effects of landscape and field management is necessary for predicting carabid communities and with interactions. These effects, mediated via trophic resources, supports the diversity and abundance of carabid communities and their provision of ecosystem services. Our results show that promoting crop diversity and connectivity to semi-natural habitats will directly enhance carabid communities in farmland by manipulating their migration from source habitats. A reduction in field management intensity will preserve local standing weeds and weed seeds, and indirectly support carabid communities. These local and landscape modifications could contribute to improve the natural regulation of pests and weeds by carabids.</span></p>
FIGURE 1 in New records of carabid-associated mesostigmatic mites (Acari: Mesostigmata) from Ukraine with description of adults of Halodarcia carabidophila Evans and Fain, 1995 (Halolaelapidae)
FIGURE 1: Halodarcia carabidophila Evans and Fain, 1995, female: A – idiosoma, dorsal view (setae of the soft cuticle in the podonotal region on the left side were not drawn); B – idiosoma, ventral view; C-D – variety of shape of anal shields; E – gnathotectum; F – subcapitulum and palp; G – chelicera. Male: H – idiosoma, ventral view; I – gnathotectum; J – corniculus; K – variety of shape of chelicerae. Scale bar: A-D, H 200 µm, E, G, I, K, L 100 µm, F, J 200 µm.
FIGURE 2 in New records of carabid-associated mesostigmatic mites (Acari: Mesostigmata) from Ukraine with description of adults of Halodarcia carabidophila Evans and Fain, 1995 (Halolaelapidae)
FIGURE 2: Halodarcia carabidophila Evans and Fain, 1995, female: A – leg I (from coxa to tibia); B – leg II; C – leg III; D – leg IV. Scale bar 200 µm.
Inconsistent responses of carabid beetles and spiders to land-use intensity and landscape complexity in Northwestern Europe
<p>Reconciling biodiversity conservation with agricultural production requires a better understanding of how key ecosystem service providing species respond to agricultural intensification. Carabid beetles and spiders represent two widespread guilds providing biocontrol services. Here we surveyed carabid beetles and spiders in 66 winter wheat fields in four Northwestern European countries and analyzed how the activity density and diversity of carabid beetles and spiders were related to crop yield (proxy for land-use intensity), percentage cropland (proxy for landscape complexity) and soil organic carbon content, and whether these patterns differed between dominant and non-dominant species. Less than 17% of carabid or spider species were classified as dominant, which accounted for more than 90% of individuals respectively. We found that carabids and spiders were generally related to different aspects of agricultural intensification. Carabid species richness was positively related with crop yield and evenness was negatively related to crop cover. The activity density of non-dominant carabids was positively related with soil organic carbon content. Meanwhile, spider species richness and non-dominant spider species richness and activity density were all negatively related to percentage cropland. Our results show that practices targeted to enhance one functionally important guild may not promote another key guild, which helps explain why conservation measures to enhance natural enemies generally do not ultimately enhance pest regulation. Dominant and non-dominant species of both guilds showed mostly similar responses suggesting that management practices to enhance service provisioning by a certain guild can also enhance the overall diversity of that particular guild.</p>
Organic fertilization suppresses aphid growth via carabids in the absence of specialist predators
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Inconsistent responses of carabid beetles and spiders to land-use intensity and landscape complexity in Northwestern Europe
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Data from: Direct and indirect effects of landscape and field management intensity on carabids through trophic resources and weeds
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Carabids data of Pterostichus flavofemoratus and Carabus depressus in the Gran Paradiso National Park (2006, 2007, 2012, 2013)
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Multiscale drivers of carabid beetle (Coleoptera: Carabidae) assemblages in small European woodlands
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Species- and trait-based responses of carabids to rotation and closer-to-nature forestry in a temperate forest under changing climate
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FIGURE 3 in Abacaecus n. gen. walterrossii n. sp., a notable hypogean carabid species from Sierra Leone, Western Africa (Coleoptera, Carabidae, Pterostichinae)
FIGURE 3. Optical microscope images of Abacaecus walterrossii n. sp.: a) head in dorsal view, b) apex of elytra, c) aedeagus in left lateral view, d) aedeagus in dorsal view.
FIGURE 2 in Abacaecus n. gen. walterrossii n. sp., a notable hypogean carabid species from Sierra Leone, Western Africa (Coleoptera, Carabidae, Pterostichinae)
FIGURE 2. SEM images of body parts of Abacaecus walterrossii n. sp.: a) head in right lateral view, b) mentum, c) base of pronotum and elytra, d) metatarsum, e) prosternal intercoxal process.
FIGURE 1 in Description of the larva of Catadromus lacordairei Boisduval, 1835 (Coleoptera: Carabidae), a threatened carabid, from Tasmania, Australia
FIGURE 1. Third instar larva of Catadromus lacordairei. A) Larva; B) Head capsule, dorsal; C) Head capsule, ventral.
FIGURE 2. A in Description of the larva of Catadromus lacordairei Boisduval, 1835 (Coleoptera: Carabidae), a threatened carabid, from Tasmania, Australia
FIGURE 2. A) Frontale; A(i) Nasale of specimen 2; B) Mandible, left, ventral aspect; C, D) Maxilla, left, dorsal and ventral respectively; E) Antenna, right; F,G) Labium, dorsal and ventral respectively.
Trait-modulated decline of carabid beetle occurrence along elevation gradients across the European Alps
Aim: To assess how species traits modulate the responses of carabids to elevation gradients, and how consistent these relationships are across different Alpine regions. Location: Italian Alps. Taxon: Coleoptera, Carabidae (ground beetles) Methods: Carabid communities were sampled using pitfall traps along elevation gradients (697-2840 m) in 416 study sites comprising a range of habitat types. The probability of carabid occurrence was modelled in relation to elevation and its interaction with two key traits, body size and wing development, using a mixed-modelling framework. The consistency of these associations was then assessed across three geographically separated regions. Results: Carabid occurrence declined with increasing elevation, although this relationship was modulated by both body size and wing development. Smaller species were less likely to occur than larger-bodied species at lower elevations. There was a steep decline in occurrence of larger species from low to high elevation, but a slight increase in smaller species, when considering all regions combined. All wing development types declined with elevation, most notably for brachypterous (reduced wings) species. However, these patterns also varied regionally, especially for wing development, indicating that trait-elevation interactions are not geographically consistent. Habitat could not explain the differences between regions for body size, but was likely an important driver of regional differences in the role of wing development on carabid occurrence. Main conclusions: Species traits are important in explaining the distribution of carabids along elevation gradients in mountains, and they may help to identify the species that are the most vulnerable, and the most resilient, to future environmental change. Increased probability of occurrence of smaller species at higher elevations suggests that they may be particularly vulnerable to environmental change in the future. However, the difference in responses to elevation between regions has important implications for modelling species distributions, as it suggests low model transferability, i.e. a trait-based model derived from one region cannot necessarily be used to project relative elevational shifts in a wider area.
FIGURE 1. Minicaraboacarus quadridiscalis n. gen., n in A new genus and species of mites of the family Caraboacaridae (Acari: Heterostigmata) associated with carabid beetles (Coleoptera: Carabidae) from Iran
FIGURE 1. Minicaraboacarus quadridiscalis n. gen., n. sp. female: 1, dorsum of the body. scale bar 50μ.
FIGURES 3–6. Minicaraboacarus quadridiscalis n. gen., n in A new genus and species of mites of the family Caraboacaridae (Acari: Heterostigmata) associated with carabid beetles (Coleoptera: Carabidae) from Iran
FIGURES 3–6. Minicaraboacarus quadridiscalis n. gen., n. sp. female: 3–6, legs I–IV, respectively. scale bar 20μ.
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Allen Brain Atlas
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OpenNeuro
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