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981 results for “Alienates”
Data from: Modeling spatial expansion of invasive alien species: relative contributions of environmental and anthropogenic factors to the spreading of the harlequin ladybird in France
Species distribution models (SDM) have often been used to predict the potential ranges of introduced species and prioritize management strategies. However, this approach assumes equilibrium between occurrences and environmental gradients, an assumption which is violated during the invasion process, where many suitable sites are empty because the species has not yet reached them. Here we considered the invasive ladybird Harmonia axyridis as a case study to show the benefits of using a dynamic colonization–extinction model that does not assume equilibrium. We used a multi-year occupancy model incorporating environmental, anthropogenic and neighborhood effects, to identify factors that explained spreading variation of this species in France from 2004, when only a few occupied sites were detected, to 2011. We found that anthropogenic factors (urbanization, agriculture, vineyards, and presence/absence of highways) explained more variation in the diffusion process than environmental factors (winter and summer temperatures, wind-speed, and rainfall). The surface of urbanization was the major anthropogenic factor increasing the probability of colonization. The average summer temperature was the main environmental factor affecting colonization, with a negative effect when high or low. The neighborhood effect revealed that colonization was mostly influenced by contributions coming from a radius of 24 km around the focal cell. The contribution of neighborhood decreases over time, suggesting that H. axyridis is reaching its equilibrium in France. This is confirmed by the small discrepancy observed between the performance of our approach and a SDM approach when predicting a single year occupancy pattern at the end of the study period. Our approach has the advantage of explicitly modelling the state of the biological system during the spatial expansion and identifying colonization constraints. This allows managers to explore the effect of different actions on the system at key moments of the invasion process, hence providing a powerful approach to prioritize management strategies.
Ancient alien statue
An asset for one of my uni assignments Source: Objaverse 1.0 / Sketchfab
FIGURE 7. Biflustra perambulata n in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 7. Biflustra perambulata n. sp. Distal view of the interiors of the transverse walls of three zooids, showing the arc of uniporous septula, with a cluster of such pores on each side where the arc upturns; note the crenulations in the slightly raised distal rim of each zooid. Scale-bar: 100 μm.
FIGURE 4. Biflustra perambulata n in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 4. Biflustra perambulata n. sp. Bifurcation of zooid rows; note the crenulations of the distal zooid rim as seen en face. Scale-bar: 100 μm.
FIGURE 1 in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 1. Cochin Harbour, southwest coast of India. ● = the collection site of Biflustra perambulata n. sp.
FIGURE 3. Biflustra perambulata n in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 3. Biflustra perambulata n. sp. Autozooids, including one that has initiated a new zooid row; note the diminution of the cryptocyst midproximally in each zooid. Scale-bar: 100 μm.
FIGURE 6. Biflustra perambulata n in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 6. Biflustra perambulata n. sp. Autozooids in lateral view, showing the interior of a lateral wall; note the high position in the wall of the pore-plates, with subjacent parietal muscle scars and the scar of the operculum occlusor muscle at right. Note also the slightly elevated distal rims of autozooids as seen in profile. Scalebar: 100 μm.
FIGURE 8. Biflustra perambulata n in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 8. Biflustra perambulata n. sp. (right) and ephebic zooids of B. grandicella (Canu & Bassler) from New Zealand (left); note the difference in the relative size of the zooids, the different proportions of their respective cryptocysts, and the difference in granularity. Scale-bar: 200 μm.
FIGURE 5. Biflustra perambulata n in Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India
FIGURE 5. Biflustra perambulata n. sp. Distal rim of an autozooid in a continuous zooid row; note the crenulations of the distal zooid rim as seen en face. Scale-bar: 100 μm.
FIGURE 14 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 14. Callosobruchus species alien to Europe. A–B, Callosobruchus chinensis: A, Adult; B, Hind femur. C–D, Callosobruchus analis: C, Adult; D, Hind femur. E–F, Callosobruchus phaseoli: E, Adult; F, Hind femur. G–H, Callosobruchus maculatus: G, Adult; H, Hind femur.
FIGURE 11 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 11. Bruchus species alien to Europe. A–D, Bruchus rufimanus: A, Adult; B, Hind leg; C, Pronotum; D, Middle leg. E–H, Bruchus pisorum: E, Adult; F, Hind leg; G, Pronotum; H, Middle leg. I–L, Bruchus lentis: I, Adult; J, Hind leg; K, Pronotum; L, Middle leg.
FIGURE 12 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 12. Megabruchidius species alien to Europe. A–D, Megabruchidius tonkineus: A, Adult; B, Hind leg; C, Male sternites; D, Female pygidium. E–H, Megrabruchidius dorsalis: E, Adult; F, Hind leg; G, Male sternites; H, Female pygidium.
FIGURE 13 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 13. Caryedon species alien to Europe. A, Hind femur of Caryedon acaciae; B, Hind femur of Caryedon serratus.
FIGURE 9 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 9. Acanthoscelides species alien to Europe. A–B, Acanthoscelides pallidipennis: A, Adult; B, Hind leg. C–D, Acanthoscelides macrophthalmus: C, Adult; D, Hind leg. E–F, Acanthoscelides obtectus: E, Adult; F, Hind leg.
FIGURE 10 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 10. Bruchidius species alien to Europe. A–C, Bruchidius siliquastri: A, Adult; B, Male sternites; C, Female pygidium. D–F, Bruchidius terrenus: D, Adult; E, Male sternites; F, Female pygidium. G–I, Bruchidius raddianae: G, Adult; H, Male sternites; I, Female pygidium.
FIGURE 8 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 8. Adults of alien Bruchinae to Europe: A, Mimosestes mimosae; B, Caryobruchus gleditsiae; C, Merobruchus julianus; D, Caryedon acaciae; E, Caryopemon cruciger.
FIGURE 6. A in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 6. A, Pygidium of Specularius; B, Hind leg of Penthobruchus; C, Hind leg of Merobruchus: D, Elytral pubescence pattern of Penthobruchus; E, Pronotum (lateral) of Pseudopachymerina; F, Hind leg of Mimosestes; G, Pronotum of Caryopemon; H, Head of Caryopemon; I, Hind leg of Caryopemon; J, Pronotum of Caryedon; K, Head (dorsal) of Caryedon; L, Hind leg of Caryedon; M, Antennae of Caryedon; N, Pronotum of Caryobruchus; O, Antennae of Caryobruchus.
FIGURE 7 in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 7. Adults of alien Bruchinae to Europe: A, Amblycerus robiniae; B, Zabrotes subfasciatus; C, Browiecius ademptus; D, Specularius impressithorax; E, Pseudopachymerina spinipes.
FIGURE 5. A in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 5. A, Hind leg of Spermophagus; B, Hind leg of Acanthoscelides; C, Head (dorsal) of Bruchidius; D, Hind leg of Caryedon; E, Head (dorsal) of Caryedon; F, Head (dorsal) of Amblycerus; G, Fore coxae of Amblycerus; H, Head (dorsal) of Zabrotes; I, Fore coxae of Zabrotes; J, Pronotum of Bruchus; K, Hind leg of Bruchus; L, Middle leg of Bruchus; M, Pronotum of Bruchidius; N, Hind leg of Bruchidius; O, Hind femur of Callosobruchus; P, Hind femur of Bruchidius; Q, Hind femur of Acanthoscelides; R, Hind femur of Borowiecius; S, Hind femur of Specularius; T, Hind femur of Megabruchidius.
FIGURE 4E in Alien seed beetles (Coleoptera: Chrysomelidae: Bruchinae) in Europe
FIGURE 4E. Categorical diversity distribution of seed beetle species alien to Europe in continental European countries and their islands, East Mediterranean Asian countries and Caucasian countries, according to their biogeographic origin: A = Number of species of alien bruchids of nearctic origin, B = neotropical origin, C = palaearctic origin, D = afrotropical origin and E = oriental origin.
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OpenNeuro
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