A5090429711- Plant Taxonomy and Phylogenetics
- Chromosomal and Genetic Variations
- Fire effects on ecosystems
- Genetic Mapping and Diversity in Plants and Animals
- Rangeland and Wildlife Management
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Wheat and Barley Genetics and Pathology
- Physiological and biochemical adaptations
- Hydrology and Sediment Transport Processes
National Park Service
2022
Duke University
2011-2015
Bryn Mawr College
2011
Arizona State University
2011
Although climates are rapidly changing on a global scale, these changes cannot easily be extrapolated to the local scales experienced by organisms. In fact, such generalizations might quite problematic. For instance, models used predict shifts in ranges of species during climate change rarely incorporate data resolved <1 km(2), although most organisms integrate climatic drivers at much smaller scales. Empirical studies alone suggest that operative temperatures many vary as 10-20 °C depending...
• The ecological and adaptive significance of plant polyploidization is not well understood no clear pattern association between polyploid frequency environment has emerged. Climatic factors are expected to predict cytotype distribution. However, the relationship among climate, distribution variation abiotic stress tolerance traits rarely been examined. Here, we use flow cytometry root-tip squashes examine in temperate annual grass Brachypodium distachyon 57 natural populations distributed...
Differences in tolerance to water stress may underlie ecological divergence of closely related ploidy lineages. However, the mechanistic basis physiological variation governing ecogeographical cytotype segregation is not well understood. Here, using Brachypodium distachyon and its derived allotetraploid B. hybridum as model, we test hypothesis that, for heteroploid annuals, polyploids drier environments based on trait differentiation enabling drought escape. We demonstrate that under...
Understanding the condition of natural resources in protected areas is fundamental to their management and preservation. Long-term monitoring can provide crucial data for managers prioritize actions subsequently determine effectiveness. In five national park units eastern United States, National Park Service Inventory Monitoring Program monitors rare riverscour communities—open habitats which sun-loving plants grow over rocky substrates along high-gradient streams. Based on a decade...