Glaser Seminar 2012
Distinguished Glaser Seminar 2012
“Species-Tree Estimation and Tests of Species Divergence: new opportunities availed by the shift to model-based inference ”
March 5-9, 2012
Dr. Lacey Knowles
Associate Professor and Associate Curator, Museum of Zoology
University of Michigan, Department of Ecology and Evolutionary Biology
- Phylogeography and Population Genetics
- Evolutionary radiations
- Sexual selection
- Macroevolution and Phylogenetics
As an essential framework for addressing a diversity of evolutionary (and some ecological) questions, any methodological development that increases the accuracy of historical inference would be embraced. But the new approaches for estimating species trees and testing phylogeographic hypotheses are far more than this. In the case of species-tree estimates, they represent a fundamental shift in how gene trees are used and interpreted, whereby what we want to capture – species relationships and divergence times – not the type of data we collect, motivates the methodological procedures. Moreover, no matter how accurately a gene tree might be estimated, an escapable biological reality remains – gene trees differ among loci, and they may not match the underlying species tree, making traditional methodologies insufficient and ineffectual at handling the DNA sequences now being collected from multiple loci. With respect to phylogeographic study, the shift towards model-based inference has provided unprecedented details about the factors structure genetic variation and contributing to the speciation process.
In the lectures, I combine empirical investigation, simulation, and theory to verify that the intriguing promises of species-tree estimation and statistical phylogeography from the theoretical realm can be realized in practice when the messiness of real data is actually accounted for (e.g., loci with low levels of variation, missing data, incomplete taxon sampling, and realistic sampling effort).
Lecture Topics (All lectures are from Noon-1:00pm in room WC-130)
- Monday, March 05: What are Species-Tree Estimates? and Why are they the Future of Phylogenetic Study?
- Tuesday, March 06: Testing the Reconstructability of Phylogenetic Histories and the Reliability of Phylogenetic Estimates from Single-gene Studies
- Wednesday March 07: Species Delimitation within Species-tree Frameworks
- Thursday March 08: Diversification in Caribbean crickets and tests of the cause of species divergence
- Friday March 09: Exploring the consequences of climate-induced distributional shifts
Co-Sponsored by the Montgomery Botanical Center