Faculty
Jodie S. Holt
Professor of Plant Physiology (Ph.D., 1982, University of California, Davis)
Office: 2133 Batchelor Hall
Office phone: (951) 827-3801
E-mail:jodie.holt@ucr.edu
Chair, Department of Botany and Plant Sciences
Chair's office: 2118 Batchelor Hall
Chair's phone: (951) 827-4413; FAX (951)827-4437;
Chairs e-mail: bpschair@citrus.ucr.edu
For more information, please visit: Jodie Holt's Laboratory on Weed Ecology
Research conducted in the Holt laboratory focuses on population and physiological ecology of weedy and invasive plant species in wildlands and agricultural ecosystems and the application of that knowledge to management. We are investigating the population ecology of the grassland invader, Cynara cardunculus (artichoke thistle) and the mechanisms by which it invades coastal grassland ecosystems. We are also exploring phenological modeling approaches for developing management strategies for this species. A second major research project focuses on invasion of riparian habitats by Arundo donax (giant reed). Our work focuses on the habitat factors that promote invasion and replacement of native species by A. donax and the impacts of this species on native communities. We are also addressing methods of A. donax removal and restoration of native riparian species that prevent reinvasion. A new project focuses on the invasion of Brassica tournefortii, Sahara mustard, into southwest deserts.
Some Representative Publications:
Quinn, L.D., Holt, J.S. 2008. Ecological correlates of invasion by Arundo donax in three southern California riparian habitats. Biol. Invas. Vol. 10: p.591-601. (Refereed)
Marushia, R.G., Holt, J.S. 2008. Reproductive strategy of an invasive thistle: Effects of adults on seedling survival. Biol. Invas. Vol. 10: p.913-924. (Refereed, Invited)
Radosevich, S. R., J. S. Holt, and C. M. Ghersa. 2007. Ecology of Weeds and Invasive Plants: Relationship to Agriculture and Natural Resource Management, 3rd Edition. John Wiley & Sons, Inc.
Quinn, L. D., M. A. Rauterkus, and J. S. Holt. 2007. Effects of nitrogen enrichment and competition on growth and spread of giant reed (Arundo donax). Weed Science 55: 319-326.
Burger, J. C., J. S. Holt, and N. C. Ellstrand. 2007. Rapid phenotypic divergence of feral rye from domesticated cereal rye. Weed Science 55: 204-211.
Marushia, R. G. and J. S. Holt. 2006. The effects of habitat on dispersal patterns of an invasive thistle, Cynara cardunculus. Biological Invasions 8: 577-593.
White, V. A. and J. S. Holt. 2005. Competition of artichoke thistle (Cynara cardunculus) with native and exotic grassland species. Weed Science 53: 826-833.
Decruyenaere, J. G. and J. S. Holt. 2005. Ramet demography of a clonal invader, Arundo donax (Poaceae), in Southern California. Plant and Soil 277: 41-52.
Holt, J. S. 2004. Principles of weed management in agroecosystems and wildlands. Weed Technology 18: 1559-1562.
Khudamrongsawat, J., R. Tayyar, and J. S. Holt. 2004. Genetic diversity of giant reed in the Santa Ana River, California. Weed Science 52: 395-405.
Tayyar, R., J. H. T. Nguyen, and J. S. Holt. 2003. Genetic and morphological analysis of two novel nutsedge biotypes from California. Weed Science 51: 731-739.
Current Teaching
BPSC/BIOL 104, Foundations of Plant Biology.
Current Laboratory Personnel
Dr. Rana Tayyar, Staff Research Associate
Dr. Virginia White, Postdoctoral Researcher and Associate in the Experiment Station
Polly Johnson, Laboratory Assistant
Sarah Otter, Laboratory Assistant
Robin Marushia, Graduate Student Researcher
Janet Garcia, Graduate Student Researcher
Lynn Wihbey, Graduate Student Researcher
Kai Palenscar, Graduate Student Researcher
Dale Halbritter, Laboratory Helper
James Mandly, Laboratory Helper