Contact InformationAddress: Joey Shaw, Ph.D.
Department of Biological and Environmental Sciences
Dept. 2653
615 McCallie Avenue
Chattanooga, TN 37403-2598
Fax: 423.425.2285
I am seeking both undergraduate and graduate students interested in: floristics, invasive plant species studies, taxonomic studies, or molecular phylogenetic and/or phylogeographic studies. Interested students should contact me at joey-shaw (-at-) utc.edu.
POTTER, D., J. WEN, AND J. SHAW. Systematic and biogeographic study of the genus Prunus.
We are in the initial phases of beginning a comprehensive systematic study of Prunus L. (Rosaceae, Amygdaloideae), an economically important, morphologically diverse, and widely distributed genus of trees and shrubs. Our research will include phylogenetic and biogeographic analyses of the entire genus, construction of a phylogenetically-based infrageneric classification of Prunus, and taxonomic revision of a group of species native to Southeast Asia and Indochina. Emphasizing tropical Asia is important because this is the geographic area of Prunus diversity that is the most poorly understood taxonomically and that has been most poorly sampled in previous phylogenetic analyses.
The research team for this project consists of several plant systematists with experience and interests highly relevant to this project, including records of past research on systematics of Prunus (Lee & Wen 2001; Bortiri et al. 2001, 2002; Shaw & Small 2004).
SHAW, J. AND R.L. SMALL Concordant Phylogeographic patterns of the chloroplast and nuclear genomes in the North American plum syngameon (Prunus subgenus Prunus Section Prunocerasus; Rosaceae).
The North American plums (Prunus subgenus Prunus section Prunocerasus; Rosaceae) are infamous for their very poor development of reproductively isolating barriers. Many North American plum species are interfertile in many combinations and natural hybrids blur nearly all morphologically-based taxonomic boundaries. In previous studies, we showed that the North American plums are monophyletic and that chloroplasts were georaphically distributed, rather than being taxonomically distributed. These earlier studies concluded that frequent hybridization has allowed regional sharing of the three primary chloroplast haplotypes among the 17 putative taxa in the section. Here we examined the relationships of the North American plums using the nuclear encoded NADP+ dependant sorbitol-6-phosphate dehydrogenase gene (s6pdh) to test the phylogenetic / phylogeographic conclusions of our earlier studies. The results show that most section Prunocerasus taxa are clearly not monophyletic. Although some nuclear haplotypes are more common in some taxa, few are exclusive. Coupled with evidence from our previous studies, these results support the hypothesis that North American plums are an evolutionarily complicated species complex, or syngameon. Another important conclusion to this study highlights the problem of undersampling in closely related groups of species, but these results also show that problems can be circumvented by increased sampling.
FLEMING, CHRIS A., JOEY SHAW, TODD S. CAMPBELL, & DANIEL SIMBERLOFF. A survey of the invasive exotic plant species of the Big South Fork National River and Recreation Area, Tennessee and Kentucky.
An invasive exotic plant species inventory was conducted in the Big South Fork National River and Recreation Area (Tennessee and Kentucky) during the growing season of 2002. There is increasing concern on the effect of invasive species because of their potential detrimental impacts on native ecosystems. These impacts include competition for resources, hybridization with native species, augmented nitrogen fixation, altered hydrological cycles, and increased sedimentation. The primary goals of this study were to (1) provide the park administration with a baseline inventory of the invasive exotic plant species and (2) to prioritize the sites or species, which would assist the park administrators with the development of a proper management and eradication protocol. Because the park is relatively large, ca. 123,000 acres, surveys were concentrated at 60 sites that were predetermined to be either highly disturbed in the past (e.g., old homesteads, mines) or especially vulnerable to invasion (e.g., river corridors). At each site and for each invasive exotic species, data were collected regarding: abundance, location within the site, and perceived threat to native species and rare habitats. Thirty-two invasive species were determined to be in need of management. Utilizing the data collected from each of the 60 surveys the sites were prioritized according to perceived threat and recommendations for each site were composed which accounted for invasive species richness, relative abundance of each invasive species, unique occurrences (e.g., species found only at one site), methods of dispersal, and potential encroachment into native plant habitats. -pursuant to Cooperative Agreement No. 1443CA500099007 2001, Southern Appalachian Cooperative Ecosystem Studies Unit Partnership Program Grant, National Park Service - Southern Appalachian Cooperative Ecosystem Studies Unit Partnership Program Grant: A survey of exotic plants in Big South Fork National River and Recreation Area. $23,577.00. Prepared for the Department of the Interior, National Park Service, Oneida Tennessee and Southern Appalachian Cooperative Ecosystems Studies Unit, Knoxville, Tennessee.
University of Tennessee, Knoxville Ph.D. Botany 2005
The phylogeny and phylogeography of Prunus subgenus Prunus section Prunocerasus (Rosaceae), the North American plums.
University of Tennessee, Knoxville M.S. Botany 2001
Woody plants of the Big South Fork National River and Recreation Area, Tennessee and Kentucky and floristic comparison of selected Southern Appalachian woody floras
University of Tennessee, Chattanooga B.S. Biology 1998
Magna Cum Laude
Shaw, J. and R.L. Small. in manuscript. Concordant Phylogeographic patterns of the chloroplast and nuclear genomes in the North American plum syngameon (Prunus subgenus Prunus Section Prunocerasus; Rosaceae)..
Fleming, C., J. Shaw, T.S. Campbell, and D. Simberloff. A study of the invasive exotic plant species of the Big South Fork National River and Recreation Area, Tennessee and Kentucky. (in manuscript).
Horn, D. and J. Shaw. 2007. Noteworthy collection of Clematis fremontii in Tennessee. Castanea, in press.
Shaw, J., E. Lickey, E. E. Schilling, and R. Small. 2007. Comparison of whole chloroplast genome sequences to choose noncoding regions for phylogenetic studies in angiosperms: the tortoise and the hare III. American Journal of Botany, in press.
Shaw, J., and R. Small. 2005. Chloroplast DNA Phylogeny and Phylogeography of the North American Plums (Prunus subgenus Prunus Section Prunocerasus; Rosaceae). American Journal of Botany 92: 2011-2030.
Small, R.L., E.B. Lickey, J. Shaw, and W.D. Hauk. 2005. Amplification of noncoding chloroplast DNA for phylogenetic studies in Lycophytes and Pteridophytes with a comparative example of relative phylogenetic utility from Ophioglossaceae. Molecular Phylogenetics and Evolution 36: 509-522
Shaw, J., E. Lickey, J. Beck, S. Farmer, W. Liu, J. Miller, K. C. Siripun, C. Winder, E. E. Schilling, R. Small. 2005. The tortoise and the hare II: relative utility of 21 non-coding chloroplast DNA sequences for phylogenetic analysis. American Journal of Botany 92: 142.
Shaw, J., and R. Small. 2004. Addressing the hardest puzzle in American pomology: Phylogeny of Prunus sect. Prunocerasus (Rosaceae) based on seven noncoding chloroplast DNA regions. American Journal of Botany 91: 985.
Shaw, J., and B.E. Wofford. 2003. Woody plants of the Big South Fork National River and Recreation Area, Tennessee and Kentucky and floristic comparison of selected Southern Appalachian woody floras. Castanea 68: 119-134.
Campbell, T.S., C. Fleming, and J. Shaw. Report of the invasive exotic plant species within the Big South Fork National River and Recreation Area, Tennessee and Kentucky. Report prepared for the National Park Service.
Published Abstracts / Professional Presentations / Posters
MIller, R. and J. Shaw. 2006. Development and Applications of Georeferenced Herbarium Data. Presented (R. Miller) at Tennessee Academy of Sciences, Clarksville, TN.
Huskins, S. and J. Shaw. 2006. Preliminary Flora of the North Chickamauga Creek Gorge and Adjacent Areas, Hamilton County, TN. Presented (S. Huskins) at Tennessee Academy of Sciences, Clarksville, TN.
Miller, R. and J. Shaw. 2006. Development and Applications of Georeferenced Herbarium Data. Presented (R. Miller) at 13th Annual Geospatial Information Technology Association conference, Marietta, GA.
Shaw, J., E. Lickey, E. E. Schilling, and R. Small. 2005. The tortoise and the hare III: comparison of whole chloroplast genome sequences to choose noncoding regions for phylogenetic studies in angiosperms. Poster published at Botany 2005 in Austin TX.
Shaw, J. and R.L. Small. 2005. Concordant Phylogeographic patterns of the chloroplast and nuclear genomes in the North American plum syngameon (Prunus subgenus Prunus Section Prunocerasus; Rosaceae).. Presentation cancelled but abstract published (J. Shaw) at Botany 2005 in Austin, TX.
Shaw, Joey, and Randall Small. Chloroplast DNA Phylogeny and Phylogeography of the North American Plums (Prunus subgenus Prunus Section Prunocerasus; Rosaceae). Presented (J. Shaw) at the meetings for the Association of Southeastern Biologists in Florence, AL
Shaw, J., E. Lickey, J. Beck, S. Farmer, W. Liu, J. Miller, K. C. Siripun, C. Winder, E. E. Schilling, R. Small. 2004. The Tortoise and the Hare II: Relative Utility of 21 Noncoding Chloroplast DNA Sequences for Phylogenetic Analysis. Presented (J. Shaw) at Botany 2004 in Snowbird, UT.
Shaw, J., and R. Small. 2004. Addressing the Òhardest puzzle in American pomology:Ó Phylogeny of Prunus sect. Prunocerasus (Rosaceae) based on seven noncoding chloroplast DNA regions. Presented (J. Shaw) at Botany 2004 in Snowbird, UT.
Small, R., E. Lickey, J. Shaw, and W. Hauk. 2004. Amplification of noncoding chloroplast DNA for phylogenetic studies in Pteridophytes and Lycophytes. Presented (R. Small) at Botany 2004 in Snowbird, UT.
Small, R., E. Lickey, J. Shaw, and W. Hauk. 2004. Amplification of noncoding chloroplast DNA for phylogenetic studies in Pteridophytes and Lycophytes. Presented (R. Small) at the meetings for the Association of Southeastern Biologists in Memphis, TN.
Fleming, C., J. Shaw, T. Campbell, and D. Simberloff. 2004. A survey of the invasive exotic plant species of the Big South Fork National River and Recreation Area, Tennessee and Kentucky. Presented (C. Fleming) at the meetings for the Association of Southeastern Biologists in Memphis, TN.
Shaw, J., E. Lickey, J. Beck, S. Farmer, W. Liu, J. Miller, K. C. Siripun, C. Winder, E. E. Schilling, R. Small. 2003. Phylogenetic utility of fifteen noncoding cpDNA regions among major lineages of seed plants. Presented (J. Shaw) at Botany 2003 in Mobile, AL.
Shaw, J., and R. Small. 2002. A Preliminary Phylogeny of Prunus section Prunocerasus (Rosaceae). Presented (J. Shaw) at Botany 2002 in Madison, WI.
Shaw, J., and R. Small. 2002. A Preliminary Phylogeny of Prunus section Prunocerasus (Rosaceae). Presented (J. Shaw) at the meetings for the Association of Southeastern Biologists in Boone, NC.
Shaw, J., and B.E. Wofford. 2001. The woody plants of the Big South Fork National River and Recreation Area, Tennessee and Kentucky. Presented (J. Shaw) at the meetings for the Association of Southeastern Biologists in New Orleans, LA. Southeastern Biology (ASB Bulletin) 48: 132-133.
Mr. Stacy Huskins - FLORA OF THE NORTH CHICKAMAUGA CREEK GORGE STATE NATURAL AREA

The North Chickamauga Creek Gorge State Natural Area (NCCG) consists of 4,864 acres and is located in Hamilton and Sequatchie counties in eastern Tennessee. The NCCG is on the eastern edge of the Cumberland Plateau and is bordered by the Ridge and Valley physiographic province. Broadly defined habitat types support a diverse assemblage of plants on the NCCG Õs upper plateau surface, gorge slopes, stream banks, and ruderal areas. Floras of nearby areas comprised of similar habitat types have reported over 1,000 species. Ten species with either a state or federal listing are known to occur in the NCCG: Scutellaria montana, Spiraea virginiana, Nestronia umbellula, Phemeranthus mengesii, Sabatia capitata, Diervilla sessilifolia var. rivularis, Lonicera dioica, Panax quinquefolius, Viola tripartita and Glyceria acutifolia. Nineteen collecting trips were made during the spring and early summer of 2006 and 180 species of vascular plants in 72 families were documented, including several populations of Scutellaria montana.
Mr. Ryan Miller - DEVELOPMENT AND APPLICATIONS OF GEOREFERENCED HERBARIUM SPECIMENS
Recent
advances in GIS allow for new methods of conservation, restoration, and general
biological inquiry especially if data from natural history collections are
utilized. Currently, we are databasing and georeferencing the
approximately 11,000 plant specimens of the UTC Herbarium. The primary
focus of this research is to create online, interactive county distribution
maps for each plant species. The database will include over 50 searchable
characteristic fields based on the proposed Darwin Core 2 format (e.g., GPS
coordinates, date collected, locality description, and reproductive
state). Other applications of our research include identifying areas of
high plant diversity, highlighting areas of endemism, tracking the spread of
invasive species, determining locations in need of additional collecting
efforts, and studying flowering times in relation to geographic location.
However, the full potential of these and other unnamed applications is
predicated on the progress of SERNECÕs effort to link and share data among
southeastern herbaria.
