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1,558 results for “southern Africa”
Figure 13 in Aloe ×caesia Salm-Dyck (Asphodelaceae) is the correct name of the common hybrid aloe [Aloe arborescens Mill. × A. ferox Mill.]from the southern Cape, South Africa
Figure 13. Plate of Aloe fulgens published in Todaro's Hortus botanicus panormitanus (1889) as Tab. XXXIII, see pp. 40–42.
FIGURE 1 in Caroxylon (Chenopodiaceae s.str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations
FIGURE 1. Representative taxa of the genus Caroxylon from southern Africa. A: C. tetramerum, South Africa, Knersvlakte, Moedverloor NR near Lutzville, local endemic of the quartz patches; B: C. verdoorniae, South Africa, Little Karoo, Groot Phesantefontein, local endemic of the quartz patches; C: C. contrariifolia, South Africa, Knersvlakte, loamy, shale-derived soil supporting succulent scrub, Lankverwag Farm near Vanrhynsdorp (inset: detail of fertile branch); D: C. zeyheri, South Africa, Knersvlakte, gannabosveld (succulent scrub dominated by gannabos, vernacular name for Salsola/Caroxylon) near Vanrhynsdorp; E: C. etoshensis, Namibia, Etosha National Parl, Okaukuejo, saline calcrete flats along edges of the large Etosha Pan; F: C. divaricatum, South Africa, Olifants River mouth, supratidal saline flats fringing an old estuary system; G: C. nollothensis, South Africa, Namaqualand, Port Nolloth, McDougalls Bay, shell-rich coastal dunes. All photos by L. Mucina.
Data for: Precipitation gradients drive high tree species turnover in the woodlands of eastern and southern Africa
<p>Savannas cover one-fifth of the Earth's surface, harbour substantial biodiversity, and provide a broad range of ecosystem services to hundreds of millions of people. The community composition of trees in tropical moist forests varies with climate, but whether the same processes structure communities in disturbance-driven savannas remains relatively unknown. We investigate how biodiversity is structured over large environmental and disturbance gradients in woodlands of eastern and southern Africa. We use tree inventory data from the Socio-Ecological Observatory for Studying African Woodlands (SEOSAW) network, covering 755 ha in a total of 6780 plots across nine countries of eastern and southern Africa, to investigate how alpha, beta, and phylogenetic diversity vary across environmental and disturbance gradients. We find strong climate-richness patterns, with precipitation playing a primary role in determining patterns of tree richness and high turnover across these savannas. Savannas with greater rainfall contain more tree species, suggesting that low water availability places distributional limits on species, creating the observed climate-richness patterns. Both fire and herbivory have minimal effects on tree diversity, despite their role in determining savanna distribution and structure. High turnover of tree species, genera, and families is similar to turnover in seasonally dry tropical forests of the Americas, suggesting this is a feature of semiarid tree floras. The greater richness and phylogenetic diversity of wetter plots show that broad-scale ecological patterns apply to disturbance-driven savanna systems. High taxonomic turnover suggests that savannas from across the regional rainfall gradient should be protected if we are to maximise the conservation of unique tree communities.</p>
FIG. 15 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 15. Known distribution of Chamaecrista plumosa var. plumosa (O) and C. plumosa var. erecta (-) in southern Africa.
FIG. 10 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 10. Morphology of Chamaecrista gordon-grayei. A1–A5. Petals. B. Ovary, densely hairy. C1–C3. Stamens, with anthers in three series. Voucher: Muller & Giess 554 (WIND). Scale bars = 1 mm.
FIG. 11 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 11. Known distribution of Chamaecrista gordon-grayei subsp. gordongrayei (-) and Chamaecrista gordon-grayei subsp. longipedicellata (O) in southern Africa.
FIG. 12 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 12. Morphology of Chamaecrista grandiglandulata. A1–A5. Petals. B. Ovary, densely hairy. C1–C3. Stamens, with anthers in three series. Voucher:
FIG. 3 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 3. Extrafloral nectaries of Chamaecrista species. A. C. mimosoides, sessile, circular or circular-elliptic. B. C. capensis var. capensis, circular, sub-sessile or attached on small stalk. C. C. biensis, circular, concave, sub-sessile or raised on small stalk. D. C. comosa subsp. capriconia, elliptic, sessile, spreading over the petiole. E. C. comosa subsp. comosa, sessile, slightly sunken in petiole. F. C. grandiglandulata, large, sessile, elliptic, overlapping the sides of petiole. G. C. gordon-grayei subsp. longipedicellata, sub-sessile to sessile, circular. H. C. falcata, extrafloral nectaries, long stalked, concave on top. Vouchers: A. Burtt & Hilliard 3215 (NU). B. Walker 119 (PRE). C. Phelan 1120 (PRE). D. Burger 292 (PRE). E. Arnold 792 (NU). F. Ward 1219 (NH). G. De Winter and Wiss 4423 (PRE). H. Ward 2439 (PRE). Scale bars = 5 mm).
FIG. 6 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 6. Distribution of Chamaecrista capensis var. capensis (-) and Chamaecrista capensis var. flavescens (O) in southern Africa.
FIG. 2 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 2. Variation in size, shape and number of leaflets of the Chamaecrista species. A. C. absus showing a leaf with only two leaflets. B. C. comosa subsp. comosa showing a large leaf bearing wide leaflets. C. C. stricta showing a leaf with narrow leaflets. D, F. C. capensis var. capensis and C. capensis var. flavescens showing short leaves bearing wide linear to linear oblong leaflets. E. C. plumosa var. erecta showing a leaf with leaflets that are obliquely linear, often with white hairs on the margins. G. C. grandiglandulata showing a leaf with multiple small leaflets. Vouchers: A. Coeteer 18 (NBG). B. Nemando and Musandiwa 22 (NBG). C. Brenan 14186 (NBG). D. Nemando and Musandiwa 42 (NBG). E Musandiwa 18 (NBG). F Nemando and Musandiwa 19 (NBG). G. Brenan 14218 (NBG). Scale bars = 1 cm.
FIG. 1 in A Taxonomic Revision of Chamaecrista (Caesalpinioideae, Cassieae, Cassiinae) in Southern Africa
FIG. 1. General morphology of Chamaecrista. A. Habit of C. mimosoides showing a low-growing growth form. B. Habit of C. capensis var. flavescens showing a large flower. C. Habit of C. grandiglandulata branching in the upper half, showing short pedicels and small pale flowers. D. Habit of C. comosa subsp. comosa showing broad leaflets, 2–5 mm wide. E. Habit of C. biensis showing a prostrate or decumbent growth form and small flowers. F. Habit of C. stricta, growth form and small flowers. G. Habit of C. plumosa var. erecta. Photographs A–D, G taken by Liada Musandiwa, E–F taken by Anthony Magee.
A burned area database from Sentinel-2 imagery (2016-2022) for Madagascar, southern Mozambique, Eswatini and eastern South Africa
<p>This database includes georeferenced burned area at 20 m and fire dates covering the period 2016-2022 for Madagascar, southern Mozambique (Maputo, Maputo City, Gaza, Inhambane), Eswatini, and eastern South Africa (Limpopo, Mpumalanga, KwaZulu-Natal, Eastern Cape). The classification of burned areas has been done based on 165,833 Sentinel-2 scenes (2A and 2B), by applying a two-phased algorithm on the probability output of a random forest model. The product has been validated in Madagascar with long temporal reference burned area units distributed into two fire activity strata. The accuracy analysis performed for the years 2019 and 2021 revealed a Dice coefficient of ≥79%, commission errors ≤18% and omission error ≤24% with a relative bias of about -8%. Intercomparisons with other available burned area products (FireCCISFD11, FireCCISFD20, GABAM, FireCCI51, C3SBA11, MCD64) indicated a consistent performance throughout the entire period. The product is provided in shapefiles, divided into four-month periods. Each shapefile contains a field named “BurnDate” indicating the date when the burned area was detected in format YYYYMMDD. Missing values indicate areas that were not burned, while zero values represent areas that were not considered in the mapping process due to persistent pixel low quality conditions.</p>
FIGURE 2 in Eupotemus tuberculatus sp. nov., the first hooded shore beetle confirmed from southern Africa (Coleoptera, Epimetopidae)
FIGURE 2. Eupotemus carinaticollis group, confirmed distribution and habitat. A) Distribution of E. carinaticollis group species, red symbol = E. taianus Fikáček et al., 2021, green symbols = E. carinaticollis (Basilewsky, 1956), yellow symbol = E. uluguru Fikáček et al., 2021, blue star = E. tuberculatus sp. nov.; B) Type locality of E. tuberculatus sp. nov. South Africa, Northern Province, Magaliesberg, Mountain Sanctuary Park, margins of mountain stream, 1430 m – red arrow indicates area where specimens were found.
FIGURE 1 in Eupotemus tuberculatus sp. nov., the first hooded shore beetle confirmed from southern Africa (Coleoptera, Epimetopidae)
FIGURE 1. Eupotemus tuberculatus sp. nov., holotype. A) dorsal habitus; B) lateral habitus; C) fronto-dorsal view; D) aedeagus dorsal; E) aedeadus lateral; F) aedeagus ventral. Scale bars A–C) = 0.5 mm; D–F) = 100 μm.
FIGURE 13 in A taxonomic revision of the genus Pauridia (Hypoxidaceae) in southern Africa
FIGURE 13. Distribution map for Pauridia pudica (triangles) and P. trifurcillata (dots) both from Eastern Cape and P. aemulans (squares) from Western Cape, South Africa.
FIGURE 38. Pauridia monophylla. A in A taxonomic revision of the genus Pauridia (Hypoxidaceae) in southern Africa
FIGURE 38. Pauridia monophylla. A, whole plant; B, leaf in transverse section; C, stamen in ventral and dorsal views on left and right respectively; D, style and stigma branches; E, ovary in transverse section; F, capsule; G, seed. Scale bar A = 10 mm; B–D = 1.5 mm; E, F = 3 mm; G = 0.5 mm. Drawn by Tracey Nowell from Esterhuysen 37008 (NBG!).
FIGURE 37. Pauridia affinis. A in A taxonomic revision of the genus Pauridia (Hypoxidaceae) in southern Africa
FIGURE 37. Pauridia affinis. A, whole plant; B, leaf in transverse section; C, stamen in ventral view; D, style and stigma branches; E, ovary in transverse section; F, capsule; G, seed. Scale bar A = 9 mm; B = 1.2 mm; C, D = 3 mm; E = 1.5 mm; F = 7 mm. Scale bar G = 0.5 mm. Drawn by Tracey Nowell from E. Parker s.n. (NBG!).
FIGURE 36. Distribution maps for A in A taxonomic revision of the genus Pauridia (Hypoxidaceae) in southern Africa
FIGURE 36. Distribution maps for A, Pauridia monticola subsp. monticola (dots) from Northern and Western Cape; P. monticola subsp. nubigena (triangle) from Northern Cape; B, P. affinis from Western Cape, South Africa.
FIGURE 42. Pauridia alticola. A in A taxonomic revision of the genus Pauridia (Hypoxidaceae) in southern Africa
FIGURE 42. Pauridia alticola. A, whole plant; B, flower in longitudinal section; C, stamen in lateral views; D, style and stigma branches; E, ovary in transverse section; F, seed. Scale bar A, B = 20 mm. Scale bar C, D = 6 mm; E = 3 mm; F = 0.7 mm. Drawn by Tracey Nowell [A–E from Thompson 2345 (NBG!); F from Burtt (2000: Fig. 2C)].
FIGURE 40. Pauridia capensis. A in A taxonomic revision of the genus Pauridia (Hypoxidaceae) in southern Africa
FIGURE 40. Pauridia capensis. A, whole plant; B, leaf in transverse section; C, leaf margin; D, two outer stamens in dorsal and ventral views on left and right respectively; E, two inner stamens in dorsal and ventral views on left and right respectively; F, style and stigma branches. G. ovary in transverse section; H, capsule; I, seed. Scale bar A = 20 mm; B = 2. 75 mm; C = 0.1 mm; D–F 3 mm; H = 4 mm; I = 0.4 mm. Drawn by Nicci Page-Cairns from Snijman 2098 (NBG!).
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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.