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497 results for “Caatinga”
Data from: Plant protection services mediated by extrafloral nectaries decline with aridity but are not influenced by chronic anthropogenic disturbance in Brazilian Caatinga
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Leaf-cutting ants negatively impact the regeneration of the Caatinga dry forest across abandoned pastures
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Data for: Planning for a future of changes: prioritizing areas for conservation of small mammals in the Caatinga, Brazil
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Data from: The rapid recovery of a Caatinga dry forest is mediated by disturbance-adapted species
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Human disturbance and aridity influence biomass harvesting by leaf-cutting ants with impacts on nutrient dynamics in a Caatinga dry forest
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Supplementary material: Mammal diversity responses to anthropic, environmental, and seasonal changes within Caatinga seasonal dry forest landscapes
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Cactus height increases the modularity of a plant-frugivore network in the Caatinga dry forest
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Data from: Leaf-cutting ant nests support less dense and impoverished seed assemblages in a human-modified Caatinga dry forest
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Data for: Determinants of resource use in lizard assemblages from the Neotropical semiarid Caatinga
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Bat-flower interaction networks in Caatinga reveal generalized associations and temporal stability
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Figure 2 in Habitat use and diet of the endemic lizard Ameivula nigrigula (Squamata: Teiidae) in Caatinga domainı Northeastern Brazil
Figure 2. Frequency of microhabitat use by Ameivula nigrigula in dune fields in the lower-mid São Francisco River valley at Santo Inácio, Gentio do Ouro, Bahia, Brazil. BS = On bare sand; HERB = Under herbaceous vegetation; SUS = On sand under shrubs; and LLS = On leaf litter under shrubs.
Data from: Anthropogenic disturbance and rainfall variation threaten the stability of plant‐ant interactions in the Brazilian Caatinga
Climate change is projected to exacerbate the effects of anthropogenic disturbance, with negative impacts on ecosystem stability and functioning. We evaluate the additive and combined effects of chronic anthropogenic disturbance (CAD) and rainfall variation on the temporal stability of mutualistic EFN‐bearing plant‐ant networks in a Caatinga dry forest. We evaluated whether changes in the stability of these interactions are driven by changes in the stability of the communities of partners involved and/or in ant behavior. We sampled EFN‐bearing plant‐ant networks in sixteen 20m×20m plots distributed across CAD and rainfall gradients. The stability of EFN‐bearing plant and attendant‐ant communities were measured as the inverse of temporal differences in their community structure and composition. We also computed the stability of EFN‐bearing plant‐ant networks by measuring the inverse of temporal differences in network specialization metrics. We found that, in general, the structure and composition of plant and ant interacting communities were similarly stable along both environmental gradients. Only CAD and its interaction with rainfall affected the temporal stability of EFN‐bearing plant diversity, which declined as CAD increased, with a more pronounced relationship in wetter areas. However, variation in levels of CAD and, to a lesser extent, rainfall greatly modulated the stability of EFN‐bearing plant‐ant network specialization. CAD reduced the stability of network generality (specialization at the ant level), an effect that was much stronger in wetter areas. Meanwhile, the stability in network vulnerability (specialization at the plant level) decreased with the increase of CAD and the decrease of rainfall levels. Finally, there was a trend of decreasing stability in specialization of the overall network with increasing CAD. Our results suggest that changes in the structure of interaction networks are mainly driven by a switch in ant behavior rather than by changes in the structure and composition of plant and ant communities between years.
FIGURE 13 in A remarkable new species of Micropeza Meigen (Diptera: Micropezidae) from Caatinga biome, Brazil
FIGURE 13. Distribution of Micropeza Meigen species with finger-shaped projection on costal vein (males).
FIGURES 4–8 in A remarkable new species of Micropeza Meigen (Diptera: Micropezidae) from Caatinga biome, Brazil
FIGURES 4–8. Micropeza chiroptera sp. nov., holotype ³. 4–6. Head; 4. Dorsal view; 5. Frontal view; 6. Lateral view; 7. Thorax, dorsal view; 8. Mid femur, anterior view.
FIGURE 4. Oxyascaris caatingae n in Two new species of Cosmocercidae (Nematoda: Cosmocercoidea) of Leptodactylus macrosternum Miranda-Ribeiro (Anura: Leptodactylidae) from Caatinga Biome Brazil
FIGURE 4. Oxyascaris caatingae n. sp. (A) anterior region, male, ventral view. (B) anterior region, male, lateral view. (C) anterior end, male, apical view. (D) posterior region, male, ventral view. (E) posterior region, male, lateral view. (F) tail, male, lateral view. (G) tail, male, ventral view; (H) tail of female, lateral view. (I) left spicule, ventral view. (J) gubernaculum, ventral view. (k) vulva, ovijector, and eggs, lateral view.
FIGURE 2. Oxysomatium petrolinensis n in Two new species of Cosmocercidae (Nematoda: Cosmocercoidea) of Leptodactylus macrosternum Miranda-Ribeiro (Anura: Leptodactylidae) from Caatinga Biome Brazil
FIGURE 2. Oxysomatium petrolinensis n. sp. (A) total female length. (B) anterior end, male, apical view. (C) anterior region, male, ventral view. (D) anterior region, male, lateral view. (E) posterior region, male, ventral view. (F) posterior region, male, lateral view. (G) tail, male, lateral view. (H) gubernaculum, ventral view. (I) tail, female, lateral view. (J) vulva, ovijector and eggs, lateral view.
FIGURE 5. Oxyascaris caatingae n in Two new species of Cosmocercidae (Nematoda: Cosmocercoidea) of Leptodactylus macrosternum Miranda-Ribeiro (Anura: Leptodactylidae) from Caatinga Biome Brazil
FIGURE 5. Oxyascaris caatingae n. sp. (A) anterior end, male, apical view (white arrows indicate the cephalic papillae). (B) anterior end, female, apical view (white arrows indicate the cephalic papillae). (C) posterior region, male, latero ventral view. (D) tail, female, latero venral view. (E) tail, male, latero ventral view. (F) cloacal region, male, latero ventral view. (G) tip of tail, male, latero ventral view. (*—somatic papillae; 1st–9th—first to ninth post cloacal papillae; a—amphid; ad—ad cloacal papillae; an—anus; dl—dorsal lip; lvl—latero ventral lip; pre—pre cloacal papillae; u—unpaired pre cloacal papillae).
FIGURE 3. Oxysomatium petrolinensis n in Two new species of Cosmocercidae (Nematoda: Cosmocercoidea) of Leptodactylus macrosternum Miranda-Ribeiro (Anura: Leptodactylidae) from Caatinga Biome Brazil
FIGURE 3. Oxysomatium petrolinensis n. sp. (A) anterior region, male, dorsal view. (B) anterior end, male, dorsal view (white arrows indicate the cephalic papillae). (C) posterior region, male, latero ventral view (white arrows indicate post cloacal papillae). (D) cloacal region, male, latero ventral view. (E) tail filament, male, latero ventral view. (F) tail, female, latero venral view. (*—somatic papillae; 1st–7th—first to seventh post cloacal papillae; a—amphid; ad—ad cloacal papillae; ba—body alae; dl—dorsal lip; lvl—latero ventral lip; pre—pre cloacal papillae; u—unpaired pre cloacal papillae).
FIGURE 1 in Two new species of Cosmocercidae (Nematoda: Cosmocercoidea) of Leptodactylus macrosternum Miranda-Ribeiro (Anura: Leptodactylidae) from Caatinga Biome Brazil
FIGURE 1. Type localities of Oxysomatium petrolinensis n. sp. and Oxyascaris caatingae n. sp. in municipality of Petrolina, state Pernambuco, Brazil. Abbreviations: BA – state of Bahia; PE – state of Pernambuco; PI – state of Piauí.
Data from: Chronic anthropogenic disturbance drives the biological impoverishment of the Brazilian Caatinga vegetation
1. In addition to acute transformations of ecosystems caused by deforestation, old-growth forests worldwide are being increasingly altered by low-intensity but chronic human disturbance. Overgrazing and the continuous extraction of forest products are important drivers of chronic disturbance, which can lead to the gradual local extinction of species and the alteration of vegetation structure. 2. We tested this hypothesis in the Brazilian Caatinga vegetation, one of the most species-rich and populated semi-arid regions of the world. Using a multi-model averaging approach we examined the impact of five recognized indicators of chronic disturbance (i.e. proximity to urban centre, houses, roads, density of people and livestock) on the diversity, abundance and evenness of 30 woody plant communities. We separately tested the response of seedlings, saplings, and adults to identify the ontogenetic stages that are most susceptible to chronic disturbance. 3. We recorded over 11 000 individuals belonging to 51 plant species. As expected, most indicators of chronic disturbance were negatively related to species diversity and stem abundance, with a variable effect on community evenness. The density of people and livestock were the main factors driving changes in plant communities, with a stronger negative impact on seedling and sapling diversities. Species composition also varied significantly with disturbance indicators, irrespective of ontogeny. 4. Our results show the potential negative impact that chronic disturbance can have on Caatinga plant assemblages and highlight the fact that disturbance resulting from an extractivism-based and subsistence economy are probably driving old-growth forest stands towards shrub-dominated secondary stands. 5. Synthesis and applications. These findings indicate that chronic disturbance should not continue to be neglected and we argue for (1) research and rural programs able to support better practices in terms of land use and sustainable exploitation of forest resources, (2) improved governance and law enforcement to shift extractivism towards sustainable standards, and (3) expanding the coverage and effective implementation of strictly protected areas.
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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.
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.