Dean G. Kelch
1001 Valley Life Sciences Bldg., #2465
Berkeley, CA 94720-2465
dkelch at cdfa.ca.gov
The Baldwin Lab
The conifers have been of continued research interest to Kelch; as a lineage of limited size, conifers are useful for illuminating biogeographical patterns and evolutionary strategies, including character evolution and ecological shifts. Podocarpaceae, as the most morphologically diverse group of conifers, has been the focus of much of his research. Although usually interpreted as typically Gondwanan, evidence from the Cretaceous of Asia indicates that Podocarpaceae contains Laurasian elements. Evidently, disjunctions due to rafting of segments of Gondwana to Laurasia in the Late Jurassic explain the origins and distributions certain Podocarpaceae. Dr. Kelch is now working on a collaborative systematic study of Podocarpaceae that will combine data from different molecular markers to increase the confidence levels of our phylogenetic inferences in the group.
Dean Kelch is interested in how the study of natural groups including narrow endemic and widespread taxa, can inform our land management decisions and our understanding of patterns of evolution. His investigations of the phylogeny and evolution of North American thistles (Cirsium spp.) were originally inspired by his desire to investigate the narrow endemics occurring in this group generally viewed as weedy. This research has been funded by the National Science Foundation and the USDA National Biological Control Institute; an important goal is to facilitate host specificity testing for potential biocontrol agents of weedy thistles. He has found that North American Cirsium have low genetic diversity considering the high ecological and geographic differences between species of the group. This result is particularly striking when comparing the California endemic species to other groups of California neoendemics.
Wolf P.D., K. G. Karol, D. F. Mandoli, J. Kuehl, K. Arumuganathan, M. W. Ellis, B. D. Mishler, D.G. Kelch, R. G. Olmstead, and J. L. Boore. The first complete chloroplast genome sequenceof a lycophyte, Huperzia lucidula (Lycopodiaceae). Gene. In press.
Kelch, D. G., B. Mishler and A. Driskell. 2004. Inferring phylogeny using genomic characters: a case study using land plant plastomes. Molecular Systematics of Bryophytes, ed. B Goffinet. Missouri Botanical Garden Press. Saint Louis.
Kelch, D. G. and A. McClay. 2004. Putting the phylogeny into the centrifugal phylogenetic method. Proceedings of the XI International Symposium on Biological Control of Weeds, James Cullen, Ed. (CSIRO), Melbourne, Australia
Kelch, D. G. and B. G. Baldwin. 2003. Phylogeny and ecological radiation of New World thistles (Cirsium, Cardueae -- Compositae) based on ITS and ETS rDNA sequence data. Molecular Ecology 12: 141-151.
Kelch, D. G. 2002. Phylogenetic assessment of the monotypic genera Sundacarpus and Manoao (Coniferales: Podocarpaceae) utilizing evidence from 18S rDNA sequences. Australian Systematic Botany 15: 29-35.