67 research outputs found
FIGURE 2 in Diversity And Distribution Of Nigerian Legumes (Fabaceae)
No full textFIGURE 2. Study area, occurence and distribution of the legume lineages in Nigeria. In total, we registered 155 genera, 540 species, 552 specific and infraspecific legume taxa (Tables S1–S3). Map was constructed using 1766 occurrence records (https://doi.org/10.15468/ dl.ivbyzo).Published as part of Bello, Abubakar, Mukhtar, Fatima Batul & Muellner-Riehl, Alexandra Nora, 2021, Diversity And Distribution Of Nigerian Legumes (Fabaceae), pp. 103-124 in Phytotaxa 480 (2) on page 107, DOI: 10.11646/phytotaxa.480.2.1, http://zenodo.org/record/541555
FIGURE 1 in Diversity And Distribution Of Nigerian Legumes (Fabaceae)
No full textFIGURE 1. Some of the major vegetation types in Nigeria: A. Sahel savanna, B. Sudan savanna, C. Guinea savanna, D. Tropical Rainforest, E. Fresh water swamp, F. Montane. Photos: A, C–F: George Ibenegbu, B: A. Bello.Published as part of Bello, Abubakar, Mukhtar, Fatima Batul & Muellner-Riehl, Alexandra Nora, 2021, Diversity And Distribution Of Nigerian Legumes (Fabaceae), pp. 103-124 in Phytotaxa 480 (2) on page 104, DOI: 10.11646/phytotaxa.480.2.1, http://zenodo.org/record/541555
Exhibiting Fashion Symposium: Dr. Alexandra Palmer “Fashion Exhibitions: The Good, the Bad, and the Pointless”
No full textThe Museum at FIT presented Exhibiting Fashion, its twenty-first academic symposium on Friday, March 8, 2019. This symposium explored the history of fashion curating, the different ways fashion is displayed in museum settings, and how national and regional identities influence fashion exhibitions. The symposium was organized in conjunction with Exhibitionism: 50 Years of The Museum at FIT, which commemorated the rich history of the museum, the site of more than 200 exhibitions since the 1970s.Dr. Alexandra Palmer is the Nora E. Vaughan Senior Curator at the Royal Ontario Museum. She has curated numerous exhibitions including Christian Dior, and she is the author of the book Christian Dior: History and Modernity, 1947–1957
West to east dispersal in a widespread animal-dispersed woody angiosperm genus (Aglaia, Meliaceae) across the Indo-Australian Archipelago.
No full textAimDespite increasing scientific interest in the Indo-Australian Archipelago (IAA), this geographically complex region, hosting an outstanding level of marine and terrestrial biodiversity, remains only partly understood biogeographically. We present an updated and resolved phylogenetic tree for the woody genus Aglaia, and we investigate the origin and dispersal history of Aglaia.
LocationAustralasia, Indo-Australian Archipelago, Indomalesia, Pacific islands.
MethodsSequence data from the nuclear ribosomal internal transcribed spacers (ITS) were used to reconstruct the phylogenetic relationships of 182 taxa. The phylogeny was then used in combination with fossil data and secondary calibration information to estimate divergence times using a relaxed molecular clock approach. Biogeographical scenarios and potential ancestral areas were investigated using statistical dispersal–vicariance analysis (S-DIVA) and the dispersal–extinction–cladogenesis (DEC) method.
ResultsOur study showed that the crown group of Aglaia dates back to the Oligocene/Miocene boundary (c. 23.0 Ma), with major divergence events beginning in the middle Miocene (c. 13.8 Ma). Sundaland was confirmed as the area of origin of modern Aglaia. The results further provided evidence that dispersal routes existed between the Sunda Shelf and Wallacea and further east to the Pacific islands, crossing both Wallace's and Lydekker's lines.
Main conclusionsThe directionality of dispersal events to or across Wallacea was predominantly eastwards, following the expansion of wet tropical forest across Wallace's Line and beyond. However, several reversal dispersal events occurred as well. During the Pleistocene (0.1–2.6 Ma) there were long-distance dispersal events from the western Pacific islands back to Sundaland or the Philippines, which might have been facilitated by birds. In summary, our study confirms that Aglaia had a Sundanian origin and started to disperse eastwards during the Miocene (5.3–23.0 Ma), with limited dispersal across Lydekker's Line. The comparison of the age of clades with the proposed age of their areas of distribution based on independent geological evidence showed good temporal agreement
Pleistocene refugia and genetic diversity patterns in West Africa : insights from the liana Chasmanthera dependens (Menispermaceae)
No full textProcesses shaping the African Guineo-Congolian rain forest, especially in the West African part, are not well understood. Recent molecular studies, based mainly on forest tree species, confirmed the previously proposed division of the western African Guineo-Congolian rain forest into Upper Guinea (UG) and Lower Guinea (LG) separated by the Dahomey Gap (DG). Here we studied nine populations in the area of the DG and the borders of LG and UG of the widespread liana species, Chasmanthera dependens (Menispermaceae) by amplified fragment length polymorphism (AFLP), a chloroplast DNA sequence marker, and modelled the distribution based on current as well as paleoclimatic data (Holocene Climate Optimum, ca. 6 kyr BP and Last Glacial Maximum, ca. 22 kyr BP). Current population genetic structure and geographical pattern of cpDNA was related to present as well as historical modelled distributions. Results from this study show that past historical factors played an important role in shaping the distribution of C. dependens across West Africa. The Cameroon Volcanic Line seems to represent a barrier for gene flow in the present as well as in the past. Distribution modelling proposed refugia in the Dahomey Gap, supported also by higher genetic diversity. This is in contrast with the phylogeographic patterns observed in several rainforest tree species and could be explained by either diverging or more relaxed ecological requirements of this liana species
Research in medical education - chances and challenges : international conference, 20th - 22nd May 2009, Heidelberg ; congress abstracts
No full textAnalyses of molecular variance (AMOVAs) for cpDNA and AFLP data in <i>Chasmanthera dependens</i>.
No full textAnalyses of molecular variance (AMOVAs) for cpDNA and AFLP data in Chasmanthera dependens.</p
Principal co-ordinate analysis (PCoA) of AFLP genotypes of 54 samples of <i>Chasmanthera dependens</i> using Jaccard distances.
No full textThe first two axes explained 9.27% and 7.33% of the total variation. Color-coding differentiates a) the populations and b) the haplotypes revealed by the statistical parsimony network analysis.</p
Statistical parsimony network based on trnH-psbA cpDNA sequences of <i>Chasmanthera dependens</i> and distribution of the cpDNA haplotypes in Western Africa.
No full textSmall empty circles represent haplotypes that are not present, but necessary to link all the haplotypes recorded to the network. All haplotypes are separated from the nearest haplotype by one mutation/indel.</p
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