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Nicola G. Bergh
University of Cape Town
19Publications
7H-index
197Citations
Publications 19
Newest
#2G. Anthony Verboom (Pearson Education)H-Index: 21
Last.Nicola G. Bergh (Pearson Education)H-Index: 7
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#1Nicola G. Bergh (UCT: University of Cape Town)H-Index: 7
#2John C. Manning (UKZN: University of KwaZulu-Natal)H-Index: 32
Abstract The genus Syncarpha from the Cape region of South Africa has been shown to comprise two separate lineages based on phylogenetic analysis of plastid and nuclear DNA sequence data. The lineage that does not house the type of Syncarpha corresponds to the ‘Helichrysum paniculatum group’ of species. Here we erect a new genus, Achyranthemum, to house these species, make the necessary nomenclatural changes, and present a taxonomic revision with key, descriptions and distribution maps based on ...
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#1Jurene E. Kemp (Stellenbosch University)H-Index: 4
#2Nicola G. Bergh (UCT: University of Cape Town)H-Index: 7
Last.Allan G. Ellis (Stellenbosch University)H-Index: 18
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7 CitationsSource
#1Robert J. McKenzie (Rhodes University)H-Index: 9
#2Nicola G. Bergh (UCT: University of Cape Town)H-Index: 7
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#1Nicola G. Bergh (UCT: University of Cape Town)H-Index: 7
#2Joanne Bentley (UCT: University of Cape Town)H-Index: 2
Last.G.A. Verboom (UCT: University of Cape Town)H-Index: 3
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Phylogenetic relationships within the Relhani a generic group, a southern African lineage of 45 yellow-flowered daisy species, are examined using parsimony and Bayesian analysis of plastid DNA, nuclear DNA, and morphological characters. The resulting phylogenetic hypothesis indicates that the species fall into two clades, one comprising the genera containing short-lived (annual / biennial) species, and the other exclusively perennial. Within the perennial clade, containing six genera, several we...
2 CitationsSource
#1Joanne Bentley (UCT: University of Cape Town)H-Index: 2
#2G. Anthony Verboom (UCT: University of Cape Town)H-Index: 21
Last.Nicola G. Bergh (UCT: University of Cape Town)H-Index: 7
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1 CitationsSource
#1Nicola G. Bergh (UCT: University of Cape Town)H-Index: 7
#2Robert J. McKenzie (Rhodes University)H-Index: 9
Abstract The small Cape genus Heterolepis (Asteraceae: Cichorioideae) containing four species, is poorly known and its tribal affinities within the subfamily are enigmatic. The genus has not been taxonomically treated since the 1865 publication of Harvey and Sonder's Flora Capensis , and a new species was recently described. Here, we collate information from the more than 200 collected specimens, combined with a detailed morphological investigation of each species, and present a full revision of...
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#1Joanne BentleyH-Index: 2
Last.Nicola G. BerghH-Index: 7
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1 CitationsSource
#1Nicola G. BerghH-Index: 7
#2Sarah A. Haiden (UCT: University of Cape Town)H-Index: 2
Last.G.A. Verboom (UCT: University of Cape Town)H-Index: 3
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Abstract A phylogenetic hypothesis is presented for the charismatic but taxonomically poorly-known Cape daisy genus Syncarpha , based on near-complete ingroup sampling and good coverage of outgroup taxa. A combination of nuclear ribosomal and chloroplast spacer DNA sequence data gives a well-resolved phyogenetic hypothesis, the robustness of which is assessed via both parsimony bootstrap and Bayesian posterior probabilities based on the uncorrelated lognormal relaxed clock model. Syncarpha speci...
2 CitationsSource
#1G. Anthony Verboom (UCT: University of Cape Town)H-Index: 21
#2Nicola G. BerghH-Index: 7
Last.Matthew N. Britton (UCT: University of Cape Town)H-Index: 5
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Summary The rugged topography of the Cape Floristic Region (CFR), South Africa, is frequently invoked to explain the spectacular radiation of the Cape flora, but the mechanisms involved remain unclear. Where recent authors emphasize the importance of elevation gradients as stimuli for ecological speciation, earlier workers stressed the role of topography as an isolating mechanism, particularly in montane lineages. Using six Cape plant lineages, we tested whether elevation niches are phylogenetic...
21 CitationsSource
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