Thesis (M.A.)--West Virginia University, 2000. / Title from document title page. Document formatted into pages; contains vi, 43 p. : ill. (some col.) Vita. Includes abstract. Includes bibliographical references (p. 38-40).

Thesis (M.A.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains v, 75 p. : ill., maps (some col.). Includes abstract. Includes bibliographical references (p. 53-57).

Submitted by Maicon Juliano Schmidt (maicons) on 2015-06-05T16:57:51Z No. of bitstreams: 1 Amanda Saldanha Barbosa.pdf: 1110620 bytes, checksum: ca79658c72904b34bd463d8a587dbd0e (MD5) / Made available in DSpace on 2015-06-05T16:57:51Z (GMT). No. of bitstreams: 1 Amanda Saldanha Barbosa.pdf: 1110620 bytes, checksum: ca79658c72904b34bd463d8a587dbd0e (MD5) Previous issue date: 2015-02-25 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / PROSUP - Programa de Suporte à Pós-Gradução de Instituições de Ensino Particulares / UNEMAT - Universidade do Estado de Mato Grosso / O conceito de rio continuo (RCC) afirma que ocorrem alterações das características físicas e químicas ao longo do gradiente longitudinal de arroios, o que induz ao acréscimo de espécies de diferentes hábitos alimentares. Neste sentido o objetivo deste estudo é a caracterização trófica de espécies de peixes de cabeceira de arroios subtropicais e a identificação do fluxo de energia entre macroinvertebrados e peixes. Espera-se que a biomassa de peixes detritívoros aumente conforme o gradiente longitudinal, devido ao aumento da produção primaria neste sentido. O estudo foi desenvolvido em 32 sítios de 1ª a 4ª ordem pertencentes a oito microbacias da Bacia do Rio dos Sinos. As coletas de ictiofauna foram realizadas utilizando pesca elétrica em uma área de 100m2. Macroinvertebrados foram coletados com amostrador Surber, para avaliar a disponibilidade de recurso e biomassa de consumidores primários. A riqueza e a diversidade da comunidade íctica foram calculadas. Foi avaliada a dieta das espécies de peixes mais abundantes e calculados os índices de importância relativa e de amplitude de nicho. Para verificar a transferência de energia entre consumidores primários e secundários foi quantificada a biomassa seca de peixes e macroinvertebrados. Os resultados demonstram que a diversidade, a riqueza e a biomassa aumentaram conforme o gradiente longitudinal que arroios de cabeceira, corroborando as previsões do RCC. Também constatou-se que a comunidade íctica é composta por duas guildas alimentares (insetívoros e detritívoros). Estes últimos, por sua vez, elevaram a biomassa íctica e estabeleceram duas vias de fluxo de energia atuando como consumidores primários e secundários. / The River Continuum Concept (RCC) suggests that changes in physico-chemical factors across the stream longitudinal gradient leads to the adding of species of different feeding habits. In this sense, the aim of the study is the trophic characterization of fish headwater species from subtropical streams and to identify energy flow between macroinvertebrate and fishes. It is expected that detritivorous fish standing crop increase across stream longitudinal gradient due to increase in primary production in the same direction. This study was carried out in 32 streams from 1st to 4thorder in eight microbasins in the Sinos River basin. Ichthyofauna was sampled with electric fishing in 100m2 sections. Macroinvertebrates were sampled with Surber sampler to assess resource availability and primary consumer standing crop. Richness and diversity of fish communities were also calculated. The diet of the most abundant fish species was assessed as well as relative importance and niche amplitude indexes. The results displayed that fish diversity, richness and standing crop increased across stream longitudinal gradient corroborating RCC postulates. It was also indicated that fish communities was composed by two feeding groups (insetivorous and detritivorous). The detritivorous fishes have in turn increased fish standing crop and established two directions of energy flow which act as both primary and secondary consumers.

No description available.

No description available.

The expansion of Interstate 26 from Erwin, TN to the North Carolina border was a project that potentially adversely impacted South Indian Creek because of the steep landscapes and potential for erosion. Several studies have shown the short-term, negative effects of road construction on the water quality of nearby water bodies. Non-point source pollution is the major source of water pollution in the United States. The primary objective of this research is to evaluate the long-term effects of the construction of Interstate 26 on South Indian Creek to see if there has been any ecological recovery. The Environmental Health Sciences Laboratory of East Tennessee State University was contracted by the Tennessee Department of Transportation to collect data from before construction (1991-1992), during construction (1993-1994), and postconstruction (1995-1996). Comparison of microbial enzyme activities and other parameters to present-day (2012-2013) water quality conditions indicate that South Indian Creek has not fully recovered from the effects of the construction of the interstate.