Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
60
datasets available to search
ShareScore release 0.9.0
Dataset results
60 results for “miombo woodland”
Plastid introgression and evolution of African miombo woodlands: new insights from the plastome-based phylogeny of Brachystegia trees
<p><strong>Aim</strong>: Miombo woodlands form a characteristic vegetation type covering 2.7 million km<sup>2</sup> in southern and eastern Africa. Despite their wide geographical extent, their origin, floristic and spatial evolution through time remain understudied. To fill this gap, we studied the evolution of <em>Brachystegia</em> trees, one of the most representative genera of these woodlands (20 species), also represented in Guineo-Congolian rain forests (8 species).</p> <p><strong>Location</strong>: Tropical Africa, Guineo-Congolian forests and Zambezian savannahs.</p> <p><strong>Methods</strong>: We used a genome skimming approach to sequence the plastomes of 45 <em>Brachystegia</em> samples, covering 25 of the 29 existing species, and one outgroup (<em>Julbernardia paniculata</em>). The phylogeny of the plastomes was reconstructed and time-calibrated. We tested if the genetic divergence between lineages reflected taxonomic and/or geographic distances using Mantel tests. Finally, we inferred the evolutionary history of <em>Brachystegia</em> based on the age and spatial distribution of its lineages.</p> <p><strong>Results</strong>: Surprisingly, species represented by multiple specimens appear rarely monophyletic while plastid clades display strong geographical structuring, independently of the species. Two main clades separate woodland and rain forest species, which diverged during the late Miocene-Pliocene (95% HPD = 2.78-8.59 Ma). In miombo woodlands, three subclades occur in parapatry along an East-West axis, ranging from Angola to East Africa. Their divergence started from the Plio-Pleistocene (95% HPD = 1.17-3.69 Ma). Divergence dates (TMRCA) within miombo subclades decrease from East Africa (1.53 Ma) to Angola (0.76 Ma).</p> <p><strong>Main Conclusions</strong>: <em>Brachystegia</em> plastomes appear unreliable to identify species, probably due to species introgression leading to recurrent chloroplast captures. However, they prove very informative for tracking the past dynamics of the genus, and suggest a historical westwards expansion of miombo <em>Brachystegia</em>, and possibly of miombo vegetation, during the Plio-Pleistocene. Further investigations using nuclear DNA are needed to assess the species tree as well as speciation and hybridisation events between species. </p>
Phylogenomics of Brachystegia (Fabaceae, Detarioideae): Insights into the origin of African miombo woodlands
<p><em>Premise of study:</em></p> <p>Phylogenetic approaches can provide valuable insights on how and when a biome emerged and developed using its structuring species. In this context, <em>Brachystegia</em> Benth, a dominant genus of trees in miombo woodlands, appears as a key witness of the history of the largest woodland and savanna biome of Africa.</p> <p><em>Methods:</em></p> <p>We reconstructed the evolutionary history of the genus using targeted-enrichment sequencing on 60 <em>Brachystegia</em> specimens for a near complete species sampling. Phylogenomic inferences used supermatrix (RAxML-NG) and summary-method (ASTRAL-III) approaches. Conflicts between species and gene trees were assessed and the phylogeny was time-calibrated in BEAST. Introgression between species was explored using Phylonet.</p> <p><em>Key results:</em></p> <p>Phylogenies are globally congruent regardless of the method used. Most of the species were recovered as monophyletic, unlike previous plastid phylogenetic reconstructions where lineages were shared among geographically close individuals independently of species identity. Still, most of the individual gene trees have low levels of phylogenetic information and are mostly in conflict with the reconstructed species trees, when informative. It suggests incomplete lineage sorting and/or reticulate evolution, the latter being supported by network analyses. BEAST analysis supports a Pliocene origin for the genus, with most of the diversification events dated to the Pliocene-Pleistocene.</p> <p><em>Conclusions:</em></p> <p>These results suggest a recent origin of species of the miombo, congruently with their spatial expansion documented from plastid data. <em>Brachystegia</em> species appear to behave potentially as a syngameon, a group of interfertile but still relatively well-delineated species, an aspect that deserves further investigations.</p>
Phylogenomics of Brachystegia (Fabaceae, Detarioideae): Insights into the origin of African miombo woodlands
Open the record for dataset details and reuse information.
Plastid introgression and evolution of African miombo woodlands: new insights from the plastome-based phylogeny of Brachystegia trees
Open the record for dataset details and reuse information.
FIGURE 35. Melidia adfinia n in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 35. Melidia adfinia n. sp. female (A) and females of M. laminata from the foothills of the West Usambara Mountains (B) and the South Pare Mountains, habitus (C) and face (D).
FIGURE 30. Kefalia laeta n in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 30. Kefalia laeta n. sp. from Mingali Forest Reserve A. Male B. Mating pair C, D. Different colour forms of female.
FIGURE 29. Kefalia grafika n in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 29. Kefalia grafika n. sp. from Wotta Forest Reserve on the Mpwapwa plateau, male (A) and female (B).
FIGURE 28 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 28. Subgenital plates and semilateral to dorsal view on last abdominal tergites of female Kefalia species A, B. K. grafika n. sp. C, D. K. laeta n. sp. E, F. K. omorfa n. sp.
FIGURE 39 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 39. Subgenital plates of female Melidia species A. M. adfinia n. sp. B. M. kenyensis C. M. laminata (Damassa, Kenya) D. M. laminata (Kilimanjaro).
FIGURE 26 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 26. Male apices of Kefalia species. A. K. laeta n. sp. B. K. grafika n. sp. C, D. K. omorfa n. sp.
FIGURE 25 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 25. Stridulatory files of Kefalia species. A. K. laeta n. sp. B. K. omorfa n. sp. C. K. grafika n. sp.
FIGURE 32 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 32. Oscillograms of calling songs of Eulioptera and Kefalia species, overview. Details of pronounced song ending, 1-s-sections.
FIGURE 24. Kefalia omorfa n in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 24. Kefalia omorfa n. sp. from East Chenene Forest Reserve A. Male B–D. Different colour forms of females.
FIGURE 22 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 22. Morphological details of male Eulioptera excavata n. sp. A. Semilateral view on apex B. Rear view on apex C. Subgenital plate D. Stridulatory file.
FIGURE 34 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 34. Power spectra of the calling song of Eulioptera and Kefalia species. In species with restricted frequency range black lines mark its end. In K. grafika n. sp., the spectrum of the long group of impulses is indicated in blue and that of the final isolated impulses in green.
FIGURE 36 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 36. Stridulatory files of Melidia species A. M. laminata, Wajir District, Kenya B. M. laminata, Tanzania, Kilimanjaro; note differences in number of teeth between specimen from the Wajir District and Kilimanjaro C. M. brunneri Mashonaland, Salisbury (BMNH) D. M. adfinia n. sp.
FIGURE 27 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 27. Subgenital plates of male Kefalia species A. K. laeta n. sp. B. K. omorfa n. sp. C. K. grafika n. sp.
FIGURE 23 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 23. Morphological details of female Eulioptera excavata n. sp. A. Ovipositor B. Subgenital plate.
FIGURE 19 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 19. Oscillograms of calling songs of Horatosphaga, Peronura and Tenerasphaga species, details. 4-s-sections.
FIGURE 18 in Orthoptera (Tettigoniidae and Acridoidea) from Miombo woodlands of Central Tanzania with the description of new taxa
FIGURE 18. Oscillograms of calling songs of Horatosphaga, Peronura and Tenerasphaga species, overview. 30-s-sections. Recording of H. leggei from Bukoba, 1–15 xi 2018, leg. Claudia Hemp.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.