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396 results for “tropical Africa”
Figs 7–14. Tenuopus spp. 7 – T in A new subfamily of Dolichopodidae (Diptera) for Tenuopus Curran, 1924 with description of new species from Tropical Africa
Figs 7–14. Tenuopus spp. 7 – T. shcherbakovi Grichanov, head in ethanol with everted
Figs 1–10 in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 1–10. Lichtwardtia spp., hypopygium, left lateral view. 1 – L. angularis (Macquart);
Figs 28–33 in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 28–33. Lichtwardtia spp., male cercus after maceration, outer view. 28 – L. aethiopica
Figs 62–69 in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 62–69. Lichtwardtia spp., male wing (62–68) and hypopygium (69). 62 – L. aethi-
Figs 42–46. Lichtwardtia spp., male habitus. 42 – L in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 42–46. Lichtwardtia spp., male habitus. 42 – L. aethiopica (Bezzi); 43 – L. diana-
Figs 21–27 in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 21–27. Lichtwardtia spp., hypopygium after maceration, left (21–26) and right (27)
Figs 52–57. Lichtwardtia spp., male head. 52 – L in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 52–57. Lichtwardtia spp., male head. 52 – L. aethiopica (Bezzi); 53, 54 – L. diana-
Figs 11–20 in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 11–20. Lichtwardtia spp., hypopygium, left lateral view. 11 – L. mironovi Gricha-
Figs 34–41 in NEW SPECIES AND NEW RECORDS OF LICHTWARDTIA ENDERLEIN, 1912 (DIPTERA: DOLICHOPODIDAE) FROM TROPICAL AFRICA
Figs 34–41. Lichtwardtia spp., details of hypopygium, left lateral view. 34 – L. aethiopica
Figs 23–28. Tenuopus spp. 23–25 – T in A new subfamily of Dolichopodidae (Diptera) for Tenuopus Curran, 1924 with description of new species from Tropical Africa
Figs 23–28. Tenuopus spp. 23–25 – T. cognatus Parent; 26–28 – T. soderlundi sp. n.; 23,
Figs 19–22 in A new subfamily of Dolichopodidae (Diptera) for Tenuopus Curran, 1924 with description of new species from Tropical Africa
Figs 19–22. Tenuopus spp., epandrial lobes and surstylus, right lateral view: 19 – T. kylei
Fig. 1 in A new species of Quadrivisio (Amphipoda, Maeridae) from coastal tropical lagoons (Benin, West Africa)
Fig. 1. Location of sampling sites in Benin.
An interpolated biogeographic framework for tropical Africa using plant species distributions and the physical environment
<p><strong>Aim:</strong> Existing phytogeographic frameworks for tropical Africa lack either spatial completeness, unit definitions smaller than the regional scale, or a quantitative approach. We investigate whether physical environmental variables can be used to interpolate floristically defined vegetation units, presenting an interpolated, hierarchical, quantitative phytogeographic framework for tropical Africa, which is compared to previously defined regions.</p> <p><strong>Location: </strong>Tropical mainland Africa 24°N to 24°S.</p> <p><strong>Taxon: </strong>31,046 vascular plant species and infraspecific taxa.</p> <p><strong>Methods: </strong>We calculate a betasim dissimilarity matrix from a comprehensive whole-flora database of plant species distributions. We investigate environmental correlates of floristic turnover with local non-metric multidimensional scaling. We derive a hierarchical biogeographic framework by clustering the dissimilarity matrix. The framework is modelled using a classification decision tree method and 12 physical environmental variables to interpolate and downscale the framework across the study region.</p> <p><strong>Results: </strong>Floristic turnover is related strongly to water availability and temperature, with smaller contributions from land cover, topographic ruggedness and lithology. Region can be predicted with 90% accuracy by the model. We define 19 regions and 99 districts. We find a novel arrangement of the arid regions. Regional subdivision within the savanna biome is supported with minor variation to borders. Within the forests of west and central Africa, our whole-flora gridded regionalisation supports the divisions identified by a previous analysis of trees only.</p> <p><strong>Main conclusions:</strong> Physical environmental variables can be used to predict floristically defined vegetation units with very high accuracy, and the approach could be pursued for other inc ompletely sampled taxa and areas outside of tropical Africa. Geographic coherence is higher than in previous quantitative phytoregional definitions. For most tropical African vascular plant species, we provide predictions of which species will occur within each mapped district and region of tropical Africa. The framework should be useful for future studies in ecology, evolution and conservation.</p>
Spring arrival of the common cuckoo at breeding grounds is strongly determined by environmental conditions in tropical Africa
<p>Failure to adapt migration timing to changes in environmental conditions along migration routes and at breeding locations can result in mismatches across trophic levels, as occurs between the brood parasitic common cuckoo <em>Cuculus</em> <em>canorus</em> and its hosts. Using satellite tracking data from 87 male cuckoos across 11 years, we evaluate why the cuckoo has not advanced its arrival to the UK. Across years, breeding ground arrival was primarily determined by timing of departure from stopover in West Africa before northward crossing of the Sahara. Together with high population synchrony and low apparent endogenous control of this event, this suggests that a seasonal ecological constraint operating here limits overall variation in breeding grounds arrival, although this event was itself influenced by carry-over from timing of arrival into tropical Africa. Between-year variation within individuals was, in contrast, mostly determined by northward migration through Europe, likely due to weather conditions. We find evidence of increased mortality risk for a) early birds following migration periods positively impacting breeding grounds arrival, and b) late birds, possibly suffering energy limitation, after departure from the breeding grounds. These results help identify areas where demands of responding to global change can potentially be alleviated by improving stopover quality.</p>
Vulnerability to climate changes of tropical forests across Africa
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Leaf habit, maximum height, and wood density of tropical woody flora in Africa: Phylogenetic constraints, covariation, and responses to seasonal drought
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An interpolated biogeographic framework for tropical Africa using plant species distributions and the physical environment
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Spring arrival of the common cuckoo at breeding grounds is strongly determined by environmental conditions in tropical Africa
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Distribution. Widely distributed through out tropical Africa from Senegal E to ex treme W Uganda and E DR Congo, with isolated populations in W Angola, SE Ken ya, and N, NE & SE Tanzania; also on Bioko I. in Family Hipposideridae (Old World Leaf-nosed Bats)
Distribution. Widely distributed through out tropical Africa from Senegal E to ex treme W Uganda and E DR Congo, with isolated populations in W Angola, SE Ken ya, and N, NE & SE Tanzania; also on Bioko I.
Data from: Forest structure determines spatial changes in avian community along an elevational gradient in tropical Africa
Aim To test if tree species richness and forest structure drive spatial variation in avian communities along a tropical elevation gradient and to present information about the role of detailed forest parameters. Location A 2000-m long elevational gradient of tropical forest on Mt. Cameroon, west-central Africa. Taxon Birds and trees. Methods We performed bird censuses and vegetation mapping at the same plots across six forested sites at elevations of 350, 650, 1,100, 1,500, 1,850, and 2,200 m a.s.l., with 16 plots per elevation. We tested the effects of elevation, forest structure and tree diversity on the species richness, functional diversity and β-diversity of birds (Bray-Curtis dissimilarity). We used conditional inference trees based on random forests (RF) to investigate these relationships across all elevation sites as well as within elevations. Results Both tree and bird species richness declined monotonically with elevation. Vegetation structure correlated with elevation, and all vegetation attributes significantly differed among elevations. The RF explained 70% of the variance in avian species richness, with the most important predictors being elevation, proportion of dead trees, tree species richness and herb layer coverage. We found that elevation (and shrub layerE2) was a particularly important predictor of avian functional diversity. We identified no important predictor of bird species richness after standardization within elevations, and the proportion of dead trees was the sole important predictor of functional diversity. Within-elevation β-diversity in avian community composition was determined by the dissimilarity of the tree community and differences in leaf area index, solar radiation and spatial distance. The functional dissimilarity was best explained by leaf area index. Main conclusions Apart from elevation itself, spatial distance even within elevations correlated with compositional and functional variation among avian assemblages. Forest structural traits can have a significant influence on distribution of birds. Thus, gaps in the spatial distribution of species such as along elevations might be caused by fine-scale recognition of suitable habitats.
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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)
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.