The objective of this study was to determine the relationship between fish assemblage structure and habitat in streams dominated by an agricultural landscape. Fishes from 20 natural and 20 channelized streams were sampled using electrofishing gear in East Central Indiana. Streams that had been channelized had a lower quality fish assemblage when compared to natural streams as measured by the Indiana V. Eastern Corn Belt Plain Index of Biotic Integrity (IBI). Stream habitat was evaluated using the Qualitative Habitat Evaluation Index (QHEI), which indicated that channelized streams had lower quality primarily due to a loss of heterogeneous habitat. Pearson correlation analysis relating ECB IBI and QHEI was positive and significant, and demonstrated that a reduction in riffle and pool areas associated with channelization was the most significant factor influencing the fish community. Furthermore, species lost when streams are channelized were predictable, and often represented environmentally sensitive species. The results of this study suggested that stream channel alterations have a negative and lasting influence on the fish assemblage which should be recognized prior to any stream development. / Department of Biology

Ecological restoration techniques are increasingly employed along urban stream corridors. In the past, flood-control projects had negative impacts upon our urban streams and many of these streams suffer from degradation. Cardinal Creek, a stream that flows through Ball State University's campus is one such example. With an increase in urbanization, and subsequent loss of habitat, the stream has become nothing more than an open drain, often carrying bacteria that pose a serious health risk. Following a review of stream restoration principles and "aesthetics of care" principles, the application of these ideas is explored. This project will incorporate, both stream restoration principles and "aesthetic of care" principles in order to produce a potentially ecologically healthy and visually appealing community amenity. / Department of Architecture

The relationship between soils, soil water and stream chemistry was investigated for a first order stream in a small forested watershed in the southern Laurentians, Quebec. The study was restricted to near-stream processes, particularly how the chemistry of water leaving a hillslope influenced stream chemistry. For snowmelt, 1986, a number of naturally occurring chemical elements were used to separate stream flow into three subsurface flowpaths: groundwater, solum and upwelling flow. By quantifying upwelling flow, we introduced a new approach to identify solutions forced from the groundwater up through the solum before entering the channel. In upwelling flow, we found that dissolved silicon was reactive and total aluminum, monomeric aluminum, hydronium, magnesium and fluoride were non-reactive. For spring storms, 1992, we used an end member mixing approach to describe streamwater as a combination of chemically distinct solutions from different depths in the soil. Solutions were defined by concentrations of calcium, magnesium, sodium and dissolved silicon. The contributions of water from each soil depth were estimated using the variations in end member chemistry that were measured during the storms. Hydrological reconstructions of the events were possible and it was found that the contribution of water from each depth in podzols is related to the height of the water table in the near-stream soils.

No description available.

Thesis (Ph. D.)--George Mason University, 2004. / Includes bibliographical references (leaves 197-207).

Thesis (M.S.)--Oregon State University, 1993. / Typescript (photocopy). Includes bibliographical references (leaves 155-162). Also available on the World Wide Web.

Thesis (Ph. D.)--University of Washington, 1998. / Vita. Includes bibliographical references (leaves [157]-174).

Thesis (M. Sc.)--University of Canterbury, 2007. / Typescript (photocopy). "June 2007." Includes bibliographical references (leaves 83-94). Also available via the World Wide Web.

Thesis (M.Sc. (Geography)) - Rhodes University, 2009.

Thesis (M.S.)--Oregon State University, 2005. / Printout. Includes bibliographical references (leaves 51-55). Also available on the World Wide Web.