Committee Chair

Shaw, Joey T.

Committee Member

Boyd, Jennifer N., Wilson, Thomas

Department

Dept. of Biological and Environmental Sciences

College

College of Arts and Sciences

Publisher

University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)

Abstract

An inventory of the vascular flora of the Tennessee River Gorge (TRG) was conducted between April 2009 and July 2011. The TRG is a 41-km-long river canyon located on the Cumberland Plateau physiographic province within Hamilton and Marion Counties, Tennessee. According to previous ecological surveys, the 4,970 ha (12,281 acres) study area contains 12 natural communities and six unique habitats. A total of 960 specimens were collected. These comprised 692 species and lesser taxa, representing 392 genera from 123 families of vascular plants. Overall, 133 county range extensions were documented for Hamilton and Marion Counties. Ten rare species were reported, including Castanea dentata, Cotinus obovatus, Lonicera dioica, Panax quinquefolius, Scutellaria montana, Viola tripartita var. tripartita, Hydrastis canadensis, Onosmodium bejariense var. hispidissimum, Phemeranthus mengesii, and Polymnia johnbeckii. Of these, four were not reported in any other previous flora of the Cumberland Plateau (Cotinus obovatus, Lonicera dioica, Onosmodium bejariense var. hispidissimum, and Polymnia johnbeckii). Also identified were 92 introduced species, including Albizia julibrissin, Lonicera japonica, Paulownia tomentosa, and Pueraria montana. The largest families represented in the flora were Asteraceae, Poaceae, Cyperaceae and Fabaceae. In addition to the floristic component of this work, a phytogeographical analysis was conducted for the TRG and 12 other Cumberland Plateau floras. This analysis revealed that the floristic composition of the central and southern Cumberland Plateau in Tennessee exhibits southern geographic affinities. Specifically, examination of the phytogeography of the TRG reveals a central geographic distribution to eastern North America; however, 9.5% of the flora has affinities to the southern region, while 3.3% has northern geographic affinities.

Degree

M. S.; A thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science.

Date

12-2011

Subject

Plants -- Tennessee -- Identification

Location

Cumberland Mountains; Hamilton County (Tenn.); Marion County (Tenn.); Tennessee River

Keyword

Tennessee River Gorge; Vascular flora

Discipline

Environmental Sciences

Document Type

Masters theses

Extent

xiii, 203 leaves

Language

English

Rights

Under copyright.

License

http://creativecommons.org/licenses/by-nc-nd/3.0/

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