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263 results for “acacia”
Data from: A biogeographical regionalisation of Australian Acacia species
Aim: To develop a biogeographical regionalization of Australian Acacia species and to investigate their environmental correlates. Location: Australia. Methods: We used a previously published framework for delineating biogeographical regions. We calculated species turnover patterns of 1020 Australian Acacia species with distributions estimated from 171,758 georeferenced herbarium records aggregated to 100 km × 100 km cells (868 across Australia). An agglomerative cluster analysis using a matrix of pairwise Simpson's beta (βsim) dissimilarity values was applied. Eleven environmental variables at the same resolution as the aggregated herbarium records were used to explore the correlates of the βsim patterns using a non-metric multidimensional scaling (NMDS) analysis. We also used an ANOVA to test the significance of the environmental changes between each pair of biogeographical regions. Results: Five major Acacia biogeographical regions were proposed. These bioregions were broadly similar to the biomes of Australia. A new subdivision of the Eremaean biome was proposed for Acacia. The most influential environmental variables for the individual bioregions were: (1) temperature seasonality and topographic flatness for the south-western temperate bioregion; (2) precipitation during the coldest quarter of the year for the south-eastern temperate bioregion; (3) annual precipitation, annual mean temperature and precipitation seasonality for the monsoonal bioregion; and (4) percentage of sand in the top 30 cm of the soil, rock grain size, annual mean radiation and annual mean temperature for the Eremaean south and north regions. The NMDS analysis provided support for the observed biogeographical patterns. The statistical test showed a highly significant difference between the environments of the proposed bioregions. Climatic variables were consistent predictors across regions, whereas the influence of soils and topographic features varied among bioregions. Main conclusions: The major Acacia biogeographical regions correspond well to historical bioregionalizations, suggesting that the environmental drivers of diversification in Acacia are broadly similar to those that act on the flora as a whole. Climate seasonality combined with annual values and non-climatic factors provide support for the proposed biogeographical regionalization for Acacia.
Data from: Polygyny does not explain the superior competitive ability of dominant ant associates in the African ant-plant, Acacia (Vachellia) drepanolobium
1. The Acacia drepanolobium (also known as Vachellia drepanolobium) ant-plant symbiosis is considered a classic case of species coexistence, in which four species of tree-defending ants compete for nesting space in a single host tree species. Coexistence in this system has been explained by trade-offs in the ability of the ant associates to compete with each other for occupied trees versus the ability to colonize unoccupied trees. 2. We seek to understand the proximal reasons for how and why the ant species vary in competitive or colonizing abilities, which are largely unknown. 3. In this study, we use RADseq derived SNPs to identify relatedness of workers in colonies to test the hypothesis that competitively dominant ants reach large colony sizes due to polygyny, i.e., the presence of multiple egg-laying queens in a single colony. 4. We find that variation in polygyny is not associated with competitive ability; in fact, the most dominant species, unexpectedly, showed little evidence of polygyny. We also use these markers to investigate variation in mating behavior among the ant species, and find that different species vary in the number of males fathering the offspring of each queen. Finally, we show that the nature of polygyny varies between the two commonly polygynous species, Crematogaster mimosae and Tetraponera penzigi: in C. mimosae, queens in the same colony are often related, while this is not the case for T. penzigi. 5. These results shed light on factors influencing the evolution of species coexistence in an ant-plant mutualism, as well as demonstrating the effectiveness of RADseq-derived SNPs for parentage analysis.
Data from: Evolutionary history shapes patterns of mutualistic benefit in Acacia-rhizobial interactions
The ecological and evolutionary factors that drive the emergence and maintenance of variation in mutualistic benefit (i.e. the benefits provided by one partner to another) in mutualistic symbioses are not well understood. In this study we evaluated the role that host and symbiont phylogeny might play in determining patterns of mutualistic benefit (host response) for interactions among nine species of Acacia and 31 strains of nitrogen-fixing rhizobial bacteria. Using phylogenetic comparative methods we compared patterns of variation in mutualistic benefit to rhizobial phylogenies constructed from housekeeping and symbiosis genes; and a multi-gene host phylogeny. We found widespread genotype-by-genotype variation in patterns of plant growth. A relatively large component of this variation (21-28%) was strongly influenced by the interacting evolutionary histories of both partners, such that phylogenetically similar host species had similar growth responses when inoculated with phylogenetically similar rhizobia. We also found a relatively large non-phylogenetic effect for the average mutualistic benefit provided by rhizobia to plants, such that phylogenetic relatedness did not predict the overall benefit provided by rhizobia across all hosts. We conclude that phylogenetic relatedness should frequently predict patterns of mutualistic benefit in acacia-rhizobial mutualistic interactions; but that some mutualistic traits also evolve independently of the phylogenies.
FIGURES 17–19 in In threat of co-extinction: two new species of Acizzia Heslop-Harrison (Hemiptera: Psyllidae) from vulnerable species of Acacia and Pultenaea
FIGURES 17–19. Acizzia keithi, sp. nov. (17), Male terminalia (lateral aspect); (18), paramere (inner face, lateral aspect); (19), female terminalia, (lateral aspect). Scale = 0.2 mm.
FIGURES 11–16 in In threat of co-extinction: two new species of Acizzia Heslop-Harrison (Hemiptera: Psyllidae) from vulnerable species of Acacia and Pultenaea
FIGURES 11–16. Acizzia keithi, sp. nov. (11), Head, male, (dorsal aspect, slide); (12), habitus, male, (dorsal aspect); (13), habitus, female, (dorsal aspect); (14), habitus, male (lateral aspect); (15), habitus, female (lateral aspect); (16), forewing, male. Scale = 0.5 mm.
FIGURES 7–10 in In threat of co-extinction: two new species of Acizzia Heslop-Harrison (Hemiptera: Psyllidae) from vulnerable species of Acacia and Pultenaea
FIGURES 7–10. Acizzia veski, sp. nov. (7), Male terminalia (lateral aspect); (8), paramere (inner face, lateral aspect); (9), female terminalia, (lateral aspect); (10), fifth (final) instar nymph (ventral aspect, left; dorsal aspect right). Scale = 0.2 mm in Figs 7–9, 0.5 mm in Fig. 10.
FIGURES 1–6 in In threat of co-extinction: two new species of Acizzia Heslop-Harrison (Hemiptera: Psyllidae) from vulnerable species of Acacia and Pultenaea
FIGURES 1–6. Acizzia veski, sp. nov. (1), Head, male, (dorsal aspect, from slide); (2), habitus, male, (dorsal aspect); (3), habitus, female, (dorsal aspect); (4), habitus, male (lateral aspect); (5), habitus, female (lateral aspect); (6), forewing, male. Scale = 0.5 mm.
FIGURES 9–14. Subfamily Darninae. 9–10, Pyranthe acaciae Berg. Syntype female 1750 in Membracidae types (Hemiptera-Membracoidea) housed at the Museo de La Plata entomological collection (Argentina)
FIGURES 9–14. Subfamily Darninae. 9–10, Pyranthe acaciae Berg. Syntype female 1750/4: 9, lateral view; 10, frontal view; 11–12, Pyranthe frustatoria Berg. Syntype female 1752/1: 11, lateral view; 12, frontal view. Subfamily Heteronotinae. 13–14, Smiliorhachis proxima Berg. Lectotype male 1754/1: 13, lateral view; 14, frontal view. Scale bar: 1mm.
FIGURES 4–8 in Description of Nemophora acaciae sp. nov. (Lepidoptera: Adelidae) from Kenya
FIGURES 4–8. Nemophora acaciae sp. nov., male, holotype: (4) genital complex, ventral view (right valva not shown); (5) genital complex, lateral view; (6) juxta; (7) phallus, ventral view; (8) phallus, lateral view.
FIGURES 63–66 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 63–66. Female genitalia of Coniostola. 63. C. stereoma (Meyrick). 64. C. flavitinctana, sp. n. 65. C. rufitinctana, sp. n. 66. C. laikipiana, sp. n.
FIGURES 55–62 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 55–62. Male genitalia of Coniostola and Eucosmocydia. 55. C. stereoma (Meyrick). 56. C. flavitinctana, sp. n. 57. C. rufitinctana, sp. n. 58. C. laikipiana, sp. n. 59. E. pharangodes (Meyrick). 60. E. pharangodes (Meyrick) (with abdominal cormata). 61. E. prolixa Razowski & Wojtusiak. 62. E. prolixa Razowski & Wojtusiak (with abdominal coremata).
FIGURES 42–44 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 42–44. Male genitalia of Paraeccopsis. 42. P. insellata (Meyrick). 43. P. pseudoinsellata Aarvik, sp. n. 44. P. phoeniodes (Meyrick).
FIGURES 21–25 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 21–25. Adults and genitalia of Paraeccopsis and Endotera. 21. Adult of Paraeccopsis phoeniodes (Meyrick). 22. Adult of Endotera cyaneana Agassiz, sp. n. 23. Freshly emerged specimen of Endotera cyaneana Agassiz, sp. n. on leaves of Acacia drepanolobium. 24. Male genitalia of Endotera cyaneana Agassiz, sp. n. 25. Female genitalia of Endotera cyaneana Agassiz, sp. n.
FIGURES 1–4 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 1–4. Hystrichophora bussei Agassiz, sp. n. 1. Adult. 2. Gall on Acacia bussei with extruding pupal skin. 3. Male genitalia. 4. Female genitalia.
FIGURES 13–20 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 13–20. Adults of Paraeccopsis. 13. P. tanzanica Aarvik, sp. n. 14. P. addis Aarvik, sp. n. 15. P.turi Aarvik, sp. n. 16. P. botswanae Aarvik, sp. n. 17. P. deltophora (Meyrick). 18. P. insellata (Meyrick). 19. P. pseudoinsellata Aarvik, sp. n., dark female from Kenya. 20. P. pseudoinsellata Aarvik, sp. n., light male from Tanzania.
FIGURES 51–54 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 51–54. Genitalia of Paraeccopsis and Age. 51. P. insellata (Meyrick). 52. P. phoeniodes (Meyrick). 53. Age onychistica male. 54. Age onychistica female.
FIGURES 5–12 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 5–12. Adults of Paraeccopsis. 5–10. P. v ar i e g an a, sp. n., showing variation. 11. P. exhilarata (Meyrick). 12. P. windhoeca Razowski.
FIGURES 38–41 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 38–41. Male genitalia of Paraeccopsis. 38. P. addis Aarvik, sp. n. 39. P. tur i Aarvik, sp. n. 40. P. botswanae Aarvik, sp. n. 41. P. deltophora (Meyrick).
FIGURES 48–50 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 48–50. Female genitalia of Paraeccopsis. 48. P. t ur i Aarvik, sp. n. 49. P. deltophora (Meyrick). 50. P. pseudoinsellata Aarvik, sp. n.
FIGURES 34–37 in New Tortricidae (Lepidoptera) from East Africa with an account of the tortricid fauna of acacia in the Kenyan Rift Valley
FIGURES 34–37. Male genitalia of Paraeccopsis. 34. P. variegana, sp. n. 35. P. exhilarata (Meyrick). 36. P. windhoeca Razowski. 37. P. tanzanica Aarvik, sp. n.
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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)
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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.
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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.