William A. Freyman

Publications26
h-index8
Citations208
Highly Influential Citations8
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Cladogenetic and Anagenetic Models of Chromosome Number Evolution: A Bayesian Model Averaging Approach
&NA; Chromosome number is a key feature of the higher‐order organization of the genome, and changes in chromosome number play a fundamental role in evolution. Dysploid gains and losses in chromosome… Expand
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A Bayesian Approach for Estimating Branch-Specific Speciation and Extinction Rates
Species richness varies considerably among the tree of life which can only be explained by heterogeneous rates of diversification (speciation and extinction). Previous approaches use phylogenetic… Expand
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Spatial phylogenetics of the vascular flora of Chile.
Current geographic patterns of biodiversity are a consequence of the evolutionary history of the lineages that comprise them. This study was aimed at exploring how evolutionary features of the… Expand
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Genetic Consequences of the Transatlantic Slave Trade in the Americas
According to historical records of transatlantic slavery, traders forcibly deported an estimated 12.5 million people from ports along the Atlantic coastline of Africa between the 16th and 19th… Expand
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SUMAC: Constructing Phylogenetic Supermatrices and Assessing Partially Decisive Taxon Coverage
  • William A. Freyman
  • Computer Science, Medicine
  • Evolutionary bioinformatics online
  • 1 January 2015
TLDR
The amount of phylogenetically informative sequence data in GenBank is growing at an exponential rate, and large phylogenetic trees are increasingly used in research. Expand
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Retracing the Hawaiian silversword radiation despite phylogenetic, biogeographic, and paleogeographic uncertainty
The Hawaiian silversword alliance (Asteraceae) is an iconic adaptive radiation. However, like many island plant lineages, no fossils have been assigned to the clade. As a result, the clade's age and… Expand
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Species richness and endemism in the native flora of California.
PREMISE OF THE STUDY California's vascular flora is the most diverse and threatened in temperate North America. Previous studies of spatial patterns of Californian plant diversity have been limited… Expand
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Stochastic Character Mapping of State‐Dependent Diversification Reveals the Tempo of Evolutionary Decline in Self‐Compatible Onagraceae Lineages
Abstract A major goal of evolutionary biology is to identify key evolutionary transitions that correspond with shifts in speciation and extinction rates. Stochastic character mapping has become the… Expand
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Interaction among ploidy, breeding system and lineage diversification.
If particular traits consistently affect rates of speciation and extinction, broad macroevolutionary patterns can be interpreted as consequences of selection at high levels of the biological… Expand
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Species Selection Regime and Phylogenetic Tree Shape.
Species selection, the effect of heritable traits in generating between-lineage diversification rate differences, provides a valuable conceptual framework for understanding the relationship between… Expand
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