The lacustrine species flocks in the ancient lakes of Sulawesi (Indonesia): Linking organismic diversification and key environmental events
Evolution, Anthropology
Final Report Abstract
The aim of this project was to provide reliable cross-taxon time estimates for the species flocks in the ancient lakes of Sulawesi in order to link biological diversification to the geological and climatic history of the lakes. To this purpose, sampling gaps both within and outside the lakes were filled in selected invertebrate and vertebrate target groups, which helped to provide a more complete picture of diversity and colonization of the lakes. A completely new lineage of Caridina shrimps was discovered in the Malili lakes, which led to a revision of the age of lake colonization for this group. In addition, the accuracy of molecular clock estimates was addressed by adding more taxa/populations and seeking independent calibration points in order to reduce the reliance on using external rates derived from very different freshwater taxa. This proved difficult for most taxa, though. In summary, as a result of this project the most complete dataset on the colonization and timing thereof in the ancient Malili lakes of Sulawesi was gained and at the same time future research needs identified, the most pressing of which is the generation of robust comparable nuclear phylogenies to complement the mitochondrial data for most groups.
Publications
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(2019). Nomorhamphus versicolor, a new species of blunt-nosed halfbeak from a tributary of the Palu River, Sulawesi Tengah (Teleostei: Zenarchopteridae). Ichthyological Exploration of Freshwaters IEF-1105
Kraemer, J., Hadiaty, R.K., Herder, F.
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(2019). Structure of the andropodium of the viviparous halfbeak genus Nomorhamphus (Atherinomorpha: Beloniformes: Zenarchopteridae), endemic to Sulawesi, Indonesia. Raffles Bulletin of Zoology 67: 247–259
Kraemer, J., Thieme, P., Hadiaty, R.K., Herder, F.
