species diversification; biogeography; species richness; molecular phylogenetics; Leguminosae; Lupinus; Mimosoideae; taxonomy
Contreras-Ortiz Natalia, Atchison Guy, Hughes Colin, Madriňán Santiago (2018), Convergent evolution of high elevation plant growth forms and geographically structured variation in Andean Lupinus (Leguminosae)., in Botanical Journal of the Linnean Society
Legume Phylogeny Working Group (2017), A new subfamily classification of the Leguminosae based on a taxonomically comprehensive phylogeny, in Taxon
, 66(1), 44-77.
Atchison Guy, Nevado Bruno, Eastwood Ruth, Reynel Carlos, Madrinan Santiago, Filatov Dmitry, Hughes Colin (2016), Lost crops of the Incas: origins of domestication of the Andean pulse crop ‘tarwi’, Lupinus mutabilis., in American Journal of Botany
, 103, 1592-1606.
Hughes Colin, Filatov Dmitry, Bruno Nevado, Atchison Guy (2016), Widespread adaptive evolution during repeated evolutionary radiations in New World lupins, in Nature Communications
, 12384, 1-9.
Hughes Colin, Nyffeler Reto, Linder Peter (2015), Evolutionary plant radiations: where, when, why and how?, in New Phytologist
, 207, 249-253.
Dugas DV, Hernandez D, Koenen Erik, Schwarz E, Straub S, Hughes Colin, Jansen Robert, Nageswara-Rao N, Bailey Donovan (2015), Mimosoid legume plastome evolution: IR expansion, tandem repeat expansions, and accelerated rate of evolution in clpP, in Scientific Reports
, 5, 16958.
Hughes Colin, Atchison Guy (2015), The ubiquity of alpine plant radiations: from the Andes to the Hengduan Mountains, in New Phytologist
Nicholls James, Pennington Toby, Koenen Erik, Hughes Colin, Hearn Jack, Bunnefeld Lynsey, Dexter Kyle, Stone Graham, Kidner Catherine (2015), Using targeted enrichment of nuclear genes to increase phylogenetic resolution in the neotropical rain forest genus Inga (Leguminosae: Mimosoideae), in Frontiers in Plant Science
, 6, 710.
Koenen Erik, De Vos Jurrian, Atchison Guy, Simon Marcelo, Schrire Brian, De Souza Elvia, De Quieroz Luciano, Hughes Colin (2013), Exploring the tempo of species diversification in legumes, in South African Journal of Botany
, 89, 19-30.
Hughes Colin, Pennington Toby, Antonelli Alex (2013), Neotropical plant evolution: assembling the big picture, in Botanical Journal of the Linnean Society
, 171, 1-18.
The uneven distribution of species richness across evolutionary lineages is one of the most pervasive and fundamental features of biodiversity across all organismal groups. The reasons why some lineages diversify and others do not, why some clades are species-rich and others are not, and the underlying factors determining these differences, are crucial to understanding how diversity evolves. However, these questions have hardly been explored and remain poorly understood. To address these questions we need a better understanding of the dynamics of diversification. This involves estimating rates of species diversification, assessing among-lineage variation in diversification rates, localising rate shifts to particular branches on phylogenetic trees, and examining potential ecological, geographical and adaptive life history correlates of diversification. Recent methodological and technical advances in comparative phylogenetics, coupled with a proliferation of molecular phylogenetic data and progress in documenting taxonomic diversity, mean that these goals have gathered fresh momentum. These developments open the way for new insights into the geotemporal patterns of diversification, and prospects to develop a general framework of the dynamics of diversification. This proposal aims to address these questions using one of the largest and most evolutionarily successful families of flowering plants, the legumes. New empirical data for two contrasting legume lineages, the genus Lupinus and the subfamily Mimosoideae, will be used to gain insights into diversification patterns across broad geographical and ecological spans and time frames. DNA sequence data will be used to reconstruct time-calibrated phylogenies for these two clades with enhanced taxon sampling, resolution and support. Key gaps in documentation of taxonomic diversity in each group will be plugged to be able to determine the species richness of monophyletic terminal clades. These data will form the basis for estimating species diversification rates, testing among-lineage variation in diversification rates to locate rate shifts, and analysing the significance of correlations between diversification rate shifts and derived ecological and life history traits and geographical range shifts. Both study groups include multiple continental-scale radiations offering novel opportunities to compare the diversification trajectories of multiple lineages simultaneously across time and space.