Advanced search
1 file | 732.50 KB

Evolution along the Great Rift Valley: phenotypic and genetic differentiation of East African white-eyes (Aves, Zosteropidae)

(2015) ECOLOGY AND EVOLUTION. 5(21). p.4849-4862
Author
Organization
Abstract
The moist and cool cloud forests of East Africa represent a network of isolated habitats that are separated by dry and warm lowland savannah, offering an opportunity to investigate how strikingly different selective regimes affect species diversification. Here, we used the passerine genus Zosterops (white-eyes) from this region as our model system. Species of the genus occur in contrasting distribution settings, with geographical mountain isolation driving diversification, and savannah interconnectivity preventing differentiation. We analyze (1) patterns of phenotypic and genetic differentiation in high- and lowland species (different distribution settings), (2) investigate the potential effects of natural selection and temporal and spatial isolation (evolutionary drivers), and (3) critically review the taxonomy of this species complex. We found strong phenotypic and genetic differentiation among and within the three focal species, both in the highland species complex and in the lowland taxa. Altitude was a stronger predictor of phenotypic patterns than the current taxonomic classification. We found longitudinal and latitudinal phenotypic gradients for all three species. Furthermore, wing length and body weight were significantly correlated with altitude and habitat type in the highland species Z.poliogaster. Genetic and phenotypic divergence showed contrasting inter- and intraspecific structures. We suggest that the evolution of phenotypic characters is mainly driven by natural selection due to differences in the two macro-habitats, cloud forest and savannah. In contrast, patterns of neutral genetic variation appear to be rather driven by geographical isolation of the respective mountain massifs. Populations of the Z.poliogaster complex, as well as Z.senegalensis and Z.abyssinicus, are not monophyletic based on microsatellite data and have higher levels of intraspecific differentiation compared to the currently accepted species.
Keywords
Cloud forest, disjunction, gradient, microsatellites, morphometrics, natural selection, panmixis, polyphyletic, savannah, PHYLOGENETIC-RELATIONSHIPS, MORPHOLOGICAL DIVERGENCE, Q(ST)-F-ST COMPARISONS, CONTRASTING PATTERNS, SPECIES DELIMITATION, POPULATION-STRUCTURE, QUANTITATIVE TRAITS, CANARY-ISLANDS, ARC MOUNTAINS, FOREST BIRD

Downloads

  • Habel et al-2015-Ecology and Evolution.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 732.50 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Habel, Jan Christian, Luca Borghesio, William D Newmark, Julia J Day, Luc Lens, Martin Husemann, and Werner Ulrich. 2015. “Evolution Along the Great Rift Valley: Phenotypic and Genetic Differentiation of East African White-eyes (Aves, Zosteropidae).” Ecology and Evolution 5 (21): 4849–4862.
APA
Habel, Jan Christian, Borghesio, L., Newmark, W. D., Day, J. J., Lens, L., Husemann, M., & Ulrich, W. (2015). Evolution along the Great Rift Valley: phenotypic and genetic differentiation of East African white-eyes (Aves, Zosteropidae). ECOLOGY AND EVOLUTION, 5(21), 4849–4862.
Vancouver
1.
Habel JC, Borghesio L, Newmark WD, Day JJ, Lens L, Husemann M, et al. Evolution along the Great Rift Valley: phenotypic and genetic differentiation of East African white-eyes (Aves, Zosteropidae). ECOLOGY AND EVOLUTION. 2015;5(21):4849–62.
MLA
Habel, Jan Christian, Luca Borghesio, William D Newmark, et al. “Evolution Along the Great Rift Valley: Phenotypic and Genetic Differentiation of East African White-eyes (Aves, Zosteropidae).” ECOLOGY AND EVOLUTION 5.21 (2015): 4849–4862. Print.
@article{7257639,
  abstract     = {The moist and cool cloud forests of East Africa represent a network of isolated habitats that are separated by dry and warm lowland savannah, offering an opportunity to investigate how strikingly different selective regimes affect species diversification. Here, we used the passerine genus Zosterops (white-eyes) from this region as our model system. Species of the genus occur in contrasting distribution settings, with geographical mountain isolation driving diversification, and savannah interconnectivity preventing differentiation. We analyze (1) patterns of phenotypic and genetic differentiation in high- and lowland species (different distribution settings), (2) investigate the potential effects of natural selection and temporal and spatial isolation (evolutionary drivers), and (3) critically review the taxonomy of this species complex. We found strong phenotypic and genetic differentiation among and within the three focal species, both in the highland species complex and in the lowland taxa. Altitude was a stronger predictor of phenotypic patterns than the current taxonomic classification. We found longitudinal and latitudinal phenotypic gradients for all three species. Furthermore, wing length and body weight were significantly correlated with altitude and habitat type in the highland species Z.poliogaster. Genetic and phenotypic divergence showed contrasting inter- and intraspecific structures. We suggest that the evolution of phenotypic characters is mainly driven by natural selection due to differences in the two macro-habitats, cloud forest and savannah. In contrast, patterns of neutral genetic variation appear to be rather driven by geographical isolation of the respective mountain massifs. Populations of the Z.poliogaster complex, as well as Z.senegalensis and Z.abyssinicus, are not monophyletic based on microsatellite data and have higher levels of intraspecific differentiation compared to the currently accepted species.},
  author       = {Habel, Jan Christian and Borghesio, Luca and Newmark, William D and Day, Julia J and Lens, Luc and Husemann, Martin and Ulrich, Werner},
  issn         = {2045-7758},
  journal      = {ECOLOGY AND EVOLUTION},
  language     = {eng},
  number       = {21},
  pages        = {4849--4862},
  title        = {Evolution along the Great Rift Valley: phenotypic and genetic differentiation of East African white-eyes (Aves, Zosteropidae)},
  url          = {http://dx.doi.org/10.1002/ece3.1735},
  volume       = {5},
  year         = {2015},
}

Altmetric
View in Altmetric
Web of Science
Times cited: