https://repositorio.ufu.br/handle/123456789/19119 Wed, 22 Apr 2026 00:49:31 GMT 2026-04-22T00:49:31Z https://repositorio.ufu.br/handle/123456789/48425 Title: Construção e utilização de projeto de Wetland indoor para mitigação dos efeitos citotóxicos de solução de bituca de cigarro Abstract: Cigarette butts are among the most common and overlooked solid waste in terms of environmental impact. Once improperly discarded, they release toxic substances such as trace metals, nicotine, tar, among others, which can cause environmental damage due to their toxicity. Considering their chemical composition and the effects they have on ecosystems, the search for sustainable solutions to this issue becomes necessary. In this context, the aim of this study was to evaluate the effectiveness of an indoor constructed Wetland system using the macrophyte Eichhornia crassipes (water hyacinth) for the phytoremediation of solutions contaminated by cigarette butts. The experiment was conducted over 37 days, using leachate solution concentrations of 25%, 50%, and 100%, in addition to a negative control (distilled water) and a reference group (leachate without plants). The development of the plants in the system was monitored weekly through parameters such as weight measurement, bulb diameter measurement, bulb count, and individual flowering. Analyses were carried out before and after phytoremediation, including tests of physicochemical parameters (using a multiparameter probe) and bioassays with Allium cepa [test methodology based on Fiskesjö (1985) and slide preparation according to Guerra (2002)]. After treatment in the Wetland system, a significant improvement was observed in all physicochemical parameters, including increased dissolved oxygen and redox potential, reduced electrical conductivity and total dissolved solids, as well as an improvement in solution pH. The A. cepa results showed that after treatment in the wetland system, there was an increase in root length, a rise in the mitotic index, and a significant reduction in nuclear and chromosomal alterations, as well as in the frequency of micronuclei. It is concluded that phytoremediation using Eichhornia crassipes in an indoor wetland system is an effective and low-cost alternative for mitigating the environmental impacts caused by the improper disposal of cigarette butts, with the choice of water hyacinth justified by its high capacity for absorbing toxic compounds and rapid growth, characteristics confirmed in this study. Thu, 24 Apr 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48425 2025-04-24T00:00:00Z https://repositorio.ufu.br/handle/123456789/48222 Title: Inventário da comunidade de mamíferos terrestres de médio e grande porte do Parque Estadual do Pau Furado, Minas Gerais, Brasil Abstract: The Brazilian Cerrado stands out for its high biodiversity, but it is seriously threatened by the conversion of natural areas. Protected Areas are crucial in this regard, as they contribute at the local level to the conservation of native vegetation fragments which can improve species persistence. This study aimed to conduct an inventory of the community of medium and large sized mammals (> 1 kg) in the Pau Furado State Park (PEPF) and to compare the results with previous analyses available in the literature. Monitoring took place between May 2024 and July 2025 using camera traps, resulting in a sampling effort of 2,237 trap-days. Based on 437 independent records, the study recorded 20 species of medium and large sized mammals, a value considered satisfactory by the Jackknife 1 estimator, representing 90.9% of the expected richness for the area. Frequency and relative abundance indices referring to each recorded species were also estimated, based on species-specific detection rates throughout the sampling period. This study indicated the presence of the European hare (Lepus europaeus), an exotic species that had not previously been detected in the PEPF, as well as species classified under threat categories, such as the maned wolf (Chrysocyon brachyurus), the jaguarundi (Herpailurus yagouaroundi), the puma (Puma concolor), and the giant anteater (Myrmecophaga tridactyla). In contrast, the presence of the wild boar (Sus scrofa), an exotic species, was not detected, as previously reported in an earlier inventory of the area. This study updates the knowledge of the park’s mammal fauna, and the results indicate the relevance of PEPF for local biodiversity conservation by highlighting the occurrence of native and threatened species. Additionally, the results point to the need for improved management, especially of the buffer zone, in order to reduce potential impacts on the mammal community. Wed, 04 Feb 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48222 2026-02-04T00:00:00Z https://repositorio.ufu.br/handle/123456789/47921 Title: Uma breve análise acerca do comportamento homossexual em aves Wed, 30 Apr 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/47921 2025-04-30T00:00:00Z https://repositorio.ufu.br/handle/123456789/47727 Title: O papel dos cotilédones e dos eófilos durante o estabelecimento inicial em Cedrela fissilis Vell. (Meliaceae) Abstract: The seedling stage is seen as crucial in the survival of the most diverse plant species, due to the remarkable vulnerability of individuals during this stage of development to biotic and abiotic environmental factors, such as herbivory injuries and light variability. In general, cotyledons and eophiles perform functions of great importance in the establishment and development of seedlings, such as nutrient supply and photosynthesis. Thus, it is extremely important to elucidate the impacts caused by the loss of such structures in the early stages of seedling establishment and how these impacts can reflect on the survival and development of the plant in the long term. The objective of the present study was to understand the role of cotyledons and eophiles during initial establishment in Cedrela fissilis Vell. (Meliaceae), a plant commonly found in forest phytophysiognomies and with photosynthesizing cotyledons, also known as “cedro rosa”. To this end, the morphophysiological responses of C. fissilis to partial (-1) or total (-2) losses of cotyledons and eophiles in 30-day-old seedlings were analyzed. The experiments were carried out between July and October 2024, in a shaded nursery located at the Federal University of Uberlândia – Umuarama Campus (Uberlândia-MG). Growth parameters (height, root length, stem diameter, number of leaves and total leaf area), physiological parameters (electron transport rate - ETR) and effective quantum yield - ∆F/Fm') and biomass partitioning ratios (leaf area ratio, and root, steam and leaf dry mass ratios) were analyzed. The results showed that, although the removals did not cause significant impacts on the growth and partitioning of biomass in C. fissilis, there was an increase in photosynthetic functions in cotyledons in the absence of one or two eophiles. In addition, it was also observed that this mechanism of compensatory photosynthesis is not carried out efficiently in the eophiles of seedlings with one or two missing cotyledons. It is also evidenced by the high survival rate of C. fissilis at the end of the experimental tests a certain resilience of the species to late injury in the long term. Fri, 19 Sep 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/47727 2025-09-19T00:00:00Z