My work focuses on plant evolutionary biology and statistical genetics, and my current work involves a large, international collaboration investigating the processes of adaptive differentiation in Protea and Pelargonium of the Greater Cape Floristic Region in southwestern South Africa.
Statistical genetics
"Genetics in geographically structured populations: defining, estimating and interpreting FST." (with Bruce S. Weir), EEB Articles (2009)
Wright's F-statistics, and especially F(ST), provide important insights into the evolutionary processes that influence the...
A Bayesian hierarchical model for analysis of SNP diversity in multilocus, multipopulation samples (with Feng Guo and Dipak Dey), EEB Articles (2008)
The distribution of genetic variation among populations is conveniently measured by Wright’s FST , which...
Bayesian models for the analysis of genetic structure when populations are correlated (with Rongwei Fu and Dipak Dey), EEB Articles (2005)
Motivation: Population allele frequencies are correlated when populations have a shared history or when they...
Polytomies and bayesian phylogenetic inference (with Paul O. Lewis and Mark T. Holder), EEB Articles (2005)
Bayesian phylogenetic analyses are now very popular in systematics and molecular evolution because they allow...
Bayesian approaches for the analysis of population genetic structure: an example from Platanthera leucophae (Orchidaceae) (with Lisa E. Wallace), EEB Articles (2004)
We describe four extensions to existing Bayesian methods for the analysis of genetic structure in...
Plant reproductive biology
Extreme environments select for reproductive assurance: evidence from evening primroses (Oenothera) (with Margaret E.K. Evans, David J. Hearn, Kathryn E. Theiss, Karen Cranston, and Michael J. Donoghue), EEB Articles (2011)
• Competing evolutionary forces shape plant breeding systems (e.g. inbreeding depression, reproductive assurance). Which of...
The genetics of sex determination in stinging nettle (Urtica dioica) (with Robynn K. Shannon), EEB Articles (2006)
Urtica dioica (“stinging nettle”) includes both dioecious and monoecious forms. In most sexually dimorphic angiosperm...
Evolutionary biology
Genetic consequences of tropical second-growth forest regeneration (with Uzay U. Sezen and Robin L. Chazdon), EEB Articles (2005)
Demography
Extracting more out of relocation data: building movement models as mixtures of random walks (with Juan Manuel Morales, Daniel T. Haydon, Jacqui Frair, and John M. Fryxell), EEB Articles (2004)
We present a framework for fitting multiple random walks to animal movement paths consisting of...