Thesis (Ph. D.)--University of Wisconsin--Madison, 1947. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 121-128a).

Thesis (M.S.)--University of Wisconsin--Madison, 1981. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 41-43).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1946. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 89-93).

Proefschrift--Utrecht.

Thesis (M.S.)--University of Wisconsin--Madison, 1968. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Master of landscape design)--University of Michigan, 1938. / Cover-title (v. 1 only). Type-written on one side of leaf only. Folded plan in pocket of cover of v. 1. Plates are photographs, drawings and clipped illustrations, all mounted. Bibliography (including periodicals): 5 leaves at end of v. 2.

Thesis (Ph. D.)--West Virginia University, 2006. / Title from document title page. Document formatted into pages; contains xvi, 161 p. : ill. (some col.), maps (some part col.). Includes abstract. Includes bibliographical references.

Made available in DSpace on 2014-06-11T19:30:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-25Bitstream added on 2014-06-13T20:39:53Z : No. of bitstreams: 1 silva_cv_me_botib.pdf: 1186795 bytes, checksum: 33ce3363a0d8502049345a0c4ff4a50a (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste estudo foi analisar a composição taxonômica e a densidade de macroinvertebrados associados à macrófita Eichhornia azurea (Swartz) Kunth em seis lagoas laterais ao Rio Paranapanema em sua zona de desembocadura na Represa de Jurumirim – SP. As amostragens foram realizadas em março e agosto de 2009, supostamente meses de estações chuvosa e seca, respectivamente. Em cada uma das seis lagoas, foram selecionados três bancos distintos de E. azurea para coleta do material biológico (macrófita e fauna associada) e medida das variáveis limnológicas: profundidade, transparência, temperatura, pH, condutividade elétrica e concentrações de oxigênio dissolvido e material em suspensão. A amostragem de E. azurea foi realizada com um retângulo de 0,1976 m2, utilizando-se uma tesoura de jardinagem para retirada do material vegetal, que foi lavado em solução de formol e água para remoção dos macroinvertebrados associados. Entre os períodos estudados diferenças significativas (p<0,05) foram encontradas tanto para as variáveis limnológicas, quanto para a densidade de alguns dos taxa de macroinvertebrados. Na comparação das lagoas entre si em março e agosto, com relação as variáveis limnológicas e densidade dos taxa de macroinvertebrados (em níveis de grandes grupos), o Teste Tukey apontou mais diferenças significativas (p<0,05) para março, embora alguns dos taxa de macroinvertebrados associados à E. azurea não tenha apresentado diferença significativa entre as lagoas em nenhum dos períodos amostrados. De acordo com a análise de componentes principais, o pH e oxigênio dissolvido são as variáveis que melhor explicam a ordenação das lagoas nos períodos de estudo. Com relação à fauna associada, em ambos os períodos a classe Insecta foi a mais abundante (com destaque a família Chironomidae), seguida pelo filo Crustacea e pela classe Clitellata... / The aim of this study was to analyze the taxonomic composition and density of macroinvertebrates associated with macrophyte Eichhornia azurea (Swartz) Kunth in six lagoons to the river side Paranapanema in its mouth zone into the Jurumirim Reservoir - SP. Samples were held in March and August 2009, supposedly months of rainy and dry seasons, respectively. In each of the six lagoons three different stands of E. azurea were selected for collecting biological material (macrophytes and associated fauna) and measurement of limnological variables: depth, transparency, temperature, pH, electric conductivity and concentrations of dissolved oxygen and suspended solids. The sampling of E. azurea was performed with a rectangle of 0,1976 m2, gardening shears was used to remove the plant material, which was washed in a solution of formaldehyde and water to remove associated macroinvertebrates. Between the two periods significant differences (p <0,05) were found for both limnological variables, and for the density of some of the taxa macroinvertebrates. In comparison with each other lagoons in March and August, related limnological variables and density of taxa of macroinvertebrates (levels in large groups), the Tukey test showed more significant differences (p <0,05) in March, although some of taxa of macroinvertebrates associated with E. azurea has not presented significant difference between the lagoons in any period sampled. According to principal components analysis, pH and dissolved oxygen are the variables that best explain the ordering of lagoons during the study periods. With respect to the associated fauna, in both periods the class Insecta was the most abundant (especially the family Chironomidae), followed by phylum Crustacea and the class Clitellata. However, comparing the richness of taxa in the months of sampling, it appears that higher values were recorded in August period... (Complete abstract click electronic access below)

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Aquatic plants of the family Lemnaceae (e.g., duckweed) actively uptake, metabolize, and sequester pollutants in natural and engineered wetland systems. Numerous interrelated processes contribute to pollutant removal in wetlands; of these processes, interactions between organic pollutants and aquatic plants may be least understood. Research focused on (1) understanding parameters that affected uptake of fluorinated organic pollutants by Lemnaceae, (2) identifying plant processes involved in removal of wastewater-associated organic pollutants by Lemnaceae, and (3) assessing use of Lemnaceae callus cultures in understanding toxicity and metabolism of fluorinated organic pollutants by Lemnaceae. Through active plant uptake, Lemna minor rapidly removed 13 fluorinated phenols, with pseudo-first order rate constants of 0.20±0.04 d-1 to 0.84±0.07 d-1. Uptake rates depended on substituent type (i.e., trifluoromethyl- vs. fluoro-) and position, with slowest removal rates for di-ortho-substituted fluorophenols. Uptake rates decreased with increasing concentrations of fluorinated phenols; assessments of inhibition of plant oxygen production in conjugation with concentration studies indicated that concentration affected uptake rates even when Lemnaceae was not inhibited. Additionally, temperature dependencies of fluorinated phenol uptake by Lemnaceae were well represented by Arrhenius relationships; however, effects of temperature on plant activity were also observed in trends of uptake rates with temperature. Increasing uptake with decreasing concentration and increasing temperature, in addition to effects of plant inhibition, plant activity, and sorption on uptake, strongly emphasized the importance of plant metabolism in uptake of fluorinated phenols by Lemnaceae. Active plant uptake of wastewater-associated organic pollutants affected fate of fluoxetine, triclosan, and 2,4-dichlorophenoxyacetic acid, while passive plant removal processes contributed to fate of four of six wastewater derived organic pollutants. Consequently, plant-associated processes were important components of fate for over 50% of experimental wastewater-associated organic pollutants. Furthermore, assessments with Lemnaceae callus cultures indicated that callus cultures were generally more susceptible to inhibitory responses to fluorinated phenols than were Lemnaceae plants; however, metabolism of 3-trifluormethylphenol in Lemnaceae callus cultures and plants was similar, indicating that callus cultures may be valuable in plant metabolism studies. Research advances understanding of fate of organic pollutants in wetland systems, and thus has important implications for water quality, ecosystem health, and human health.