Title page for ETD etd-72498-163751


Type of Document Master's Thesis
Author McTammany, Matthew Eric Jr.
Author's Email Address mmctamma@vt.edu
URN etd-72498-163751
Title The Impact of Urbanization on Benthic Macroinvertebrates in Southern Appalachian Streams
Degree Master of Science
Department Biology
Advisory Committee
Advisor Name Title
Voshell, J. Reese Jr.
Webster, Jackson R.
Yin, Ray
Benfield, Ernest Fredrick Committee Chair
Keywords
  • stream
  • macroinvertebrate
  • urbanization
  • land use
  • diversity
Date of Defense 1998-07-24
Availability restricted
Abstract
Macroinvertebrate assemblage structure was compared from 12 streams differing in urbanization type and degree. Urbanization, both historical and current, was measured using several variables generated from GIS overlays of land cover, aerial photographs, and field exploration in the study watersheds. Quantitative benthic macroinvertebrate samples were taken, and a variety of physicochemical characteristics were measured. Increasing urbanization resulted in a decline in diversity and abundance of intolerant organisms. Streams in industrial areas had greater invertebrate density due to large increases in a few tolerant groups. Urbanization in the watersheds was coupled with changes in the physical and chemical structure of the streams suggesting some possible mechanisms for urbanization impact on stream biota. Multivariate analysis grouped streams based on a number of pollution-sensitive taxa suggesting the utility of this type of approach in analyzing community data.

Primary funding for this project was from the Coweeta Hydrologic Lab NSF-LTER grant. Additional funding was provided through a Graduate Research and Development Project grant from the Graduate Student Assembly of Virginia Polytechnic Institute and State University. Matching funds were provided by the Biology Department.

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