Rapid radiation, ancient incomplete lineage sorting and ancient hybridization in the endemic Lake Tanganyika cichlid tribe Tropheini

Koblmüller, Stephan; Egger, Bernhard; Sturmbauer, Christian; Sefc, Kristina M.

doi:10.1016/j.ympev.2009.09.032

Cited by 121 publications

(184 citation statements)

References 87 publications

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“…However, the phylogenetic relationships among the species remain largely unresolved, as there is a lack of resolution in several parts of the ML tree. While it is possible that the lack of resolution is due to incomplete taxon sampling and/or to the small number of characters, we suggest a plausible cause to be rapid radiation, which often results in difficulties in resolving phylogenetic patterns (Fernández & Vrba 2005;Koblmüller et al 2010). The unresolved phylogenies would in that case be the result of an almost concurrent differentiation between populations from different river stretches on a short evolutionary timescale.…”

Section: Distribution Patterns and Speciation Processesmentioning

confidence: 83%

Morphometry and DNA barcoding reveal cryptic diversity in the genus Enteromius (Cypriniformes: Cyprinidae) from the Congo basin, Africa

Ginneken

Decru

Verheyen

et al. 2017

EJT

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Abstract. One of the main challenges to adequately conserve the African fish fauna is to improve our so far unsatisfactory taxonomic knowledge of important portions of the ichthyofauna. In the present study, we attempted to unravel the taxonomic diversity of some species of Enteromius Cope, 1867, a problematic African fish genus, recently collected in the north-eastern part of the Congo basin. We used an integrative approach, combining DNA barcodes and morphological analyses. For one of the species complexes found, the E. miolepis/eutaenia species complex, we evaluated taxonomic diversity over a larger geographic scale within the Congo drainage system. Although initial literature-based species identifications allowed us to assign all examined specimens to four tentative species, DNA barcodes indicated the presence of 23 distinct mitochondrial lineages. The majority of these lineages appeared endemic to particular rivers, and in most rivers multiple lineages occur in sympatry. Subsequent exploratory morphometric analyses indicated that almost all these lineages are morphologically distinguishable and that they may therefore represent undescribed species. As only a part of the Congo basin and a subset of the species diversity within Enteromius were examined, it appears that the species richness of Enteromius in the Congo basin is severely underestimated.

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Section: Distribution Patterns and Speciation Processesmentioning

confidence: 83%

Morphometry and DNA barcoding reveal cryptic diversity in the genus Enteromius (Cypriniformes: Cyprinidae) from the Congo basin, Africa

Ginneken

Decru

Verheyen

et al. 2017

EJT

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“…Nuclear data, based on more than 2000 AFLP markers, reflect close relationships of geographically adjacent haplochromine species and clades (figures 1 and 2), whereas the mtDNA data yield clearly conflicting phylogenetic signal. Combining phylogenetic information of both datasets, each reflecting different parts of evolutionary history, with analytical approaches targeted to unravel hybridization has proved necessary to decipher the complex evolution of haplochromine cichlids [5][6][7]. Theoretically, cytonuclear discordance can also be explained by ancient shared polymorphisms as a result of incomplete lineage sorting [17].…”

Section: Discussionmentioning

confidence: 99%

“…Reconstructing robust phylogenetic relationships of haplochromine cichlids has proved to be difficult owing to limited taxon sampling and lack of phylogenetically informative characters. Until recently, phylogenetic analyses have delivered support for the monophyly of each of the major haplochromine species flocks, including the Lake Victoria superflock [3], southern African serrannochromines and Tropheini of Lake Tanganyika [1,[3][4][5]. The assumed monophyly of Lake Malawi haplochromines was recently falsified after inclusion of riverine haplochromines [6,7].…”

Section: Introductionmentioning

confidence: 99%

Repeated trans-watershed hybridization among haplochromine cichlids (Cichlidae) was triggered by Neogene landscape evolution

et al. 2012

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The megadiverse haplochromine cichlid radiations of the East African lakes, famous examples of explosive speciation and adaptive radiation, are according to recent studies, introgressed by different riverine lineages. This study is based on the first comprehensive mitochondrial and nuclear DNA dataset from extensive sampling of riverine haplochromine cichlids. It includes species from the lower River Congo and Angolan (River Kwanza) drainages. Reconstruction of phylogenetic hypotheses revealed the paradox of clearly discordant phylogenetic signals. Closely related mtDNA haplotypes are distributed thousands of kilometres apart and across major African watersheds, whereas some neighbouring species carry drastically divergent mtDNA haplotypes. At shallow and deep phylogenetic layers, strong signals of hybridization are attributed to the complex Late Miocene/Early Pliocene palaeohistory of African rivers. Hybridization of multiple lineages across changing watersheds shaped each of the major haplochromine radiations in lakes Tanganyika, Victoria, Malawi and the Kalahari Palaeolakes, as well as a miniature species flock in the Congo basin (River Fwa). On the basis of our results, introgression occurred not only on a spatially restricted scale, but massively over almost the whole range of the haplochromine distribution. This provides an alternative view on the origin and exceptional high diversity of this enigmatic vertebrate group.

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“…The tree was rooted with Individuals marked in bold letters and asterisks were also used in the AFLP tree Tropheus duboisi, which was previously shown to represent the sister group of all other Tropheus (Koblmüller et al, 2010).…”

Section: Phylogenetic Analysismentioning

confidence: 99%

A separate lowstand lake at the northern edge of Lake Tanganyika? Evidence from phylogeographic patterns in the cichlid genus Tropheus

et al. 2016

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In Lake Tanganyika, lake level fluctuations were shown to have had a major impact on the evolution of littoral species. Many species are subdivided into arrays of populations, geographical races and sister species, each colonizing a particular section of the shore. Their often limited dispersal abilities promoted geographic isolation and, on the long run, allopatric speciation. With more than 120 distinct populations, the genus Tropheus represents the most spectacular and best-studied example of this phenomenon. The present study aims at the fine-scale reconstruction of the spread of two mitochondrial Tropheus-lineages in the very north of the lake, where two species, T. sp. 'black' and T. brichardi, occur. Using mtDNA sequences and AFLP-data, we analyzed samples from 21 localities and found a highly complex conglomerate of introgressed populations formed by the repeated contact of two lineages. Our data suggest repeated cross-lake dispersal of T. sp. 'black' haplotypes along the ridge between the West and East Ubwari Fault, supporting an additional persisting lowstand-lake in the Bujumbura subbasin at the very north of the lake and highlighting once more the impact of lake level fluctuations on the genetic structure and evolution of stenotopic rockdwelling cichlid species.

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Rapid radiation, ancient incomplete lineage sorting and ancient hybridization in the endemic Lake Tanganyika cichlid tribe Tropheini

Cited by 121 publications

References 87 publications

Morphometry and DNA barcoding reveal cryptic diversity in the genus Enteromius (Cypriniformes: Cyprinidae) from the Congo basin, Africa

Morphometry and DNA barcoding reveal cryptic diversity in the genus Enteromius (Cypriniformes: Cyprinidae) from the Congo basin, Africa

Repeated trans-watershed hybridization among haplochromine cichlids (Cichlidae) was triggered by Neogene landscape evolution

A separate lowstand lake at the northern edge of Lake Tanganyika? Evidence from phylogeographic patterns in the cichlid genus Tropheus

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