https://rd.uffs.edu.br/handle/prefix/7555 2025-12-01T14:21:47Z 2025-12-01T14:21:47Z Carvalho, Douglas https://rd.uffs.edu.br/handle/prefix/8672 2025-08-06T13:59:04Z 2025-06-01T00:00:00Z

Title: Mecanismos fisiológicos de ilex paraguariensis a. St.-Hil. exposta a diferentes concentrações de cádmio Author: Carvalho, Douglas First advisor: Cargnelutti, Denise Abstract: The expansion of agribusiness activities has caused a number of environmental damages. In this sense, we can highlight soil contamination by heavy metals (such as cadmium, lead, and arsenic), originating from pesticides and fertilizers used by this sector. These contaminants represent a great danger to the health of all living beings, as they accumulate in the soil and enter the food chain. This study sought to investigate the physiological mechanisms of the species Ilex paraguariensis when exposed to different concentrations of cadmium in the soil, to evaluate its tolerance capacity and its potential use as a phytoremediation strategy. The specific objectives included the analysis of general physiological responses (biomass, height, root length, leaf area and chlorophyll content) and photosynthetic responses (CO₂ assimilation rate, carboxylation efficiency, water use efficiency, stomatal conductance, and photosystem II efficiency). The results indicated that exposure to cadmium at moderate concentrations (1.5, 3 mg Kg-1) was not only tolerated by the species, but also promoted positive effects on some physiological variables, such as a significant increase in photosynthetic efficiency (Y`), electron transport rate (ETR), net photosynthetic rate (A), water use efficiency (WUE), and the A/Ci ratio. These effects suggest the occurrence of a hormetic response. However, exposure to higher concentrations of Cd (6 mgKg-¹) triggered a reduction in performance in some of these variables, indicating a tolerance limit for this species. In general, the results indicate that the species Ilex paraguariensis presents physiological defense mechanisms that enable its acclimation when subjected to moderate stresses caused by cadmium. The analysis also suggests that the beneficial effects observed at lower concentrations of Cd may represent an adaptive potential for the eventual application of the species in phytoremediation processes. Publisher: Universidade Federal da Fronteira Sul Type: Monografia

2025-06-01T00:00:00Z Fontes, Reinaldo Gomes https://rd.uffs.edu.br/handle/prefix/8668 2025-07-29T19:17:07Z 2025-06-01T00:00:00Z

Title: Epidemiologia dos acidentes com serpentes em São Gabriel da Cachoeira - Amazonas Author: Fontes, Reinaldo Gomes First advisor: Hartmann, Marilia Teresinha Abstract: Snakes (Ophidia) are part of the Squamata, which together with Testudines, Crocodylia and Sphenodonta, are traditionally called: Reptiles. Brazil holds a prominent global position in terms of snakes diversity, with 430 identified species. However, only a small percentage of these are venomous. Snakebite incidents are subject to mandatory reporting in the country and occur most frequently in the Northern region, particularly within the Amazon Basin. São Gabriel da Cachoeira, located in the state of Amazonas, is among the most affected municipalitie. The distance from urban centers and the challenging access to remote areas hinder the timely and adequate treatment of victims. The objective of this study was to analyze the epidemiology of snakebite accidents in the municipality of São Gabriel da Cachoeira, located in the Northern region of Brazil, in the state of Amazonas. For this purpose, data from SINAN (Information System for Notifiable Diseases) from 2007 onward were used, specifically related to snakebite incidents. Within this scope, the category "Accidents by Venomous Animals" was selected, focusing on the period from 2014 to 2023. This is a descriptive study conducted through the DATASUS website, using the options: "Epidemiology and Morbidity" and subsequently "Notifiable Diseases and Conditions – (SINAN)”. The extracted data were organized and systematized in Microsoft Excel spreadsheets, which were also used for the quantitative analysis of the information. Epidemiological variables were analyzed, including the number of incidents and the types of snakes involved, the seasonal variation of cases, distribution by age group, sex, and ethnicity, the time elapsed until medical care, the location of the bite, administration of antivenom therapy, case outcomes, and the clinical severity of the snakebite incidents. The results indicated a higher occurrence of accidents involving snakes of the Bothrops genus (74%), especially affecting male individuals (402 cases), aged between 20 and 59 years. Most accidents occurred between May and July, predominantly in rural areas, among indigenous populations. The lower limbs were the most affected regions, especially the feet. Most cases were treated within the first three hours, with widespread use of antivenom therapy. However, despite the majority of cases resulting in recovery, significant challenges remain, particularly in the identification of snake species, the proper completion of notification forms, and access to medical care—especially in remote areas. Publisher: Universidade Federal da Fronteira Sul Type: Monografia

2025-06-01T00:00:00Z Magalhães, Breno de Paiva https://rd.uffs.edu.br/handle/prefix/8667 2025-07-29T19:15:43Z 2025-06-01T00:00:00Z

Title: Biodiversidade de aves na Universidade Federal da Fronteira Sul, Campus Erechim - RS Author: Magalhães, Breno de Paiva First advisor: Hartmann, Paulo Afonso Abstract: Birds are among the most diverse groups of vertebrates, with global prominence and ecological importance as bioindicators. Habitat fragmentation and anthropogenic pressure threaten avifauna, especially in biomes such as the Atlantic Forest, which harbors high diversity and endemism. This study aimed to estimate the species richness, composition, and spatial distribution of avifauna in the area of the Erechim Campus of the Federal University of the Southern Frontier (UFFS). The methodology involved point count sampling across six transects distributed in two areas with varying levels of human occupation and vegetation regeneration. Data collection occurred between October 2024 and April 2025, using binoculars, photographic records, audio recordings, and species identification through guides and specialized software. Analyses were conducted for richness, diversity (Shannon Index), ecological attributes, habitat use, and sensitivity to environmental disturbances. A total of 101 bird species were recorded, representing 14.3% of the species known in Rio Grande do Sul. Area 2, with more conserved vegetation, showed a higher number of species (N=84), greater diversity (H’=4.01), greater evenness, and exclusive occurrence of species with high environmental sensitivity. Most species were omnivorous or insectivorous, with broad habitat use. It is concluded that even anthropized areas such as the Erechim Campus can serve as important refuges for avifauna conservation, especially where there is environmental heterogeneity and the presence of forest remnants. Publisher: Universidade Federal da Fronteira Sul Type: Monografia

2025-06-01T00:00:00Z Almeida, Marcelle Andrade de https://rd.uffs.edu.br/handle/prefix/8666 2025-07-29T19:14:20Z 2025-06-01T00:00:00Z

Title: Ocorrência de giardia lamblia em material fecal canino coletados em uma ong em Erechim/RS Author: Almeida, Marcelle Andrade de First advisor: Prado, Gerônimo Rodrigues Abstract: Giardiasis is an intestinal parasitosis caused by the protozoan Giardia lamblia, with clinical and zoonotic relevance. This study aimed to investigate the occurrence of Giardia lamblia in fecal samples from shelter dogs in an NGO located in Erechim/RS, Brazil. Four fecal collections were conducted from eight identified dogs, the last one after deworming. The samples were analyzed by optical microscopy using the Faust technique, and by a rapid immunochromatographic test. Fecal pH was also measured. The results indicated the presence of cysts in all samples before deworming and negative results after treatment, demonstrating the effectiveness of the antiparasitic protocol. Statistical analysis showed significant variation in parasite load among the dogs and across the different collection times. The findings reinforce the importance of deworming, environmental hygiene, and parasitological monitoring in high-density canine environments. Publisher: Universidade Federal da Fronteira Sul Type: Monografia

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