A5100663772- Plant Diversity and Evolution
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Mine drainage and remediation techniques
- Plant and Fungal Species Descriptions
- Insect and Arachnid Ecology and Behavior
- Insect and Pesticide Research
- Evolution and Paleontology Studies
- Tailings Management and Properties
- Viral Infections and Vectors
- Genetic diversity and population structure
- Concrete and Cement Materials Research
- Atmospheric and Environmental Gas Dynamics
- Sunflower and Safflower Cultivation
- Grouting, Rheology, and Soil Mechanics
- Plant Parasitism and Resistance
- Drilling and Well Engineering
- Paleontology and Stratigraphy of Fossils
- Genetic and Environmental Crop Studies
- Species Distribution and Climate Change
- Botany and Plant Ecology Studies
- Food, Nutrition, and Cultural Practices
University of Georgia
2019-2021
Yale University
2017-2019
University of California, San Diego
2017
Technology Applications (United States)
2008
The deciduous habit of northern temperate trees and shrubs provides one the most obvious examples convergent evolution, but how did it evolve? Hypotheses based on fossil record posit that deciduousness evolved first in response to drought or darkness preadapted certain lineages as cold climates spread. An alternative is evergreens established freezing environments later habit. We monitored phenological patterns 20 species Viburnum spanning tropical, lucidophyllous (subtropical montane warm...
Abstract Phylogeny, molecular sequences, fossils, biogeography, and biome occupancy are all lines of evidence that reflect the singular evolutionary history a clade, but they most often studied separately, by first inferring fossil-dated phylogeny, then mapping on ancestral ranges biomes inferred from extant species. Here we jointly model evolution biogeographic ranges, affinities, while incorporating fossils to estimate dated phylogeny for 163 species woody plant clade Viburnum (Adoxaceae)...
Premise of the Study There have been relatively few phylogeographic studies eastern North American plants, especially animal‐dispersed shrubby species, and this leaves a significant gap in our understanding how such species were affected by glacial events. Here, we analyzed phylogeography widespread understory shrub Viburnum lantanoides . Methods We generated RAD seq data paleoclimatic distribution models ( SDM s) to identify locations refugia where V. may survived Last Glacial Maximum LGM )...
Premise We take an integrative approach in assessing how introgression and Pleistocene climate fluctuations have shaped the diversification of core Lentago clade Viburnum , a group five interfertile species with broad areas sympatry. specifically tested whether flowering time plays role maintaining isolation. Methods RAD ‐seq data for 103 individuals were used to infer relationships genetic structure within each species. Flowering times compared among on basis historical dates documented by...
Premise The Ocotea complex contains the greatest diversity of Lauraceae in Neotropics. However, traditional taxonomy group has relied on only three main floral characters, and previous molecular analyses have used a few markers provided limited support for relationships among major clades. This lack useful data hindered development comprehensive classification, as well studies character evolution. Methods We RAD‐seq to infer phylogenetic 149 species complex, generating reference‐based...
Patterns of genetic variation in crops are the result selection and demographic changes that occurred during their domestication improvement. In many cases, we have an incomplete picture origin context wild progenitors, particularly with regard to processes producing observed levels standing variation. Here, analyzed sequence diversity cultivated sunflower (Helianthus annuus L.) its progenitor (common sunflower, also H. annuus) reconstruct phylogeographic relationships population...
Enlarged sterile flowers on the periphery of inflorescences increase attractiveness floral displays, and previous studies have generally demonstrated that these positive effects insect visitation and/or reproductive success. However, experiments not specifically been designed to examine benefits under conditions reflect early stages in their evolution, i.e. when plants produce are at low frequency.Over three years, were performed natural populations Viburnum lantanoides, which produces...
Over the past 15 years, MSE Technology Applications has conducted several notable technology demonstrations of biologically based technologies to treat acid rock drainage (ARD). These projects have progressively evolved under U.S. Environmental Protection Agency’s Mine Waste Program (MWTP) and resulted in significant advances development bioreactor application sulfate-reducing bacteria (SRB) technology. In this paper, summary information from four separate demonstration will be presented for...
Abstract Phylogeny, fossils, biogeography, and biome occupancy provide evidence that reflects the singular evolutionary history of a clade. Despite connections bind them together, these lines are most often studied separately, by first inferring fossil-dated molecular phylogeny, then mapping on ancestral ranges biomes inferred from extant species. Here we jointly model evolution biogeographic ranges, affinities, sequences, incorporating fossils to estimate dated phylogeny for all 163 species...
Demonstrations and technology development conducted under the Mine Waste Technology Program (MWTP) have lead to significant improvements of sulfate-reducing bacteria (SRB) bioreactors used treat acid rock drainage (ARD). Benefits this include reduction dissolved metal ions insoluble sulfides neutralization resulting from production bicarbonate oxidation organic nutrients by bacteria. Over past 15 years, MSE has many bench-scale design tests along with several pilot-scale field...
Premise of research. Many angiosperms produce floral displays with morphologically distinct flower types that together operate in pollinator attraction. In Viburnum, nine species four widely separated subclades encircle their inflorescences enlarged sterile marginal flowers (SMFs). Previous phylogenetic analyses Viburnum were unable to resolve relationships within clades contain SMFs, making it difficult enumerate the origins/losses SMFs and identify possible environmental organismal...