TCC - Engenharia Florestal (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/436
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Resultados da Pesquisa
Item Memória hídrica (stress imprint) em sementes: impacto ecofisiológico na germinação e no crescimento inicial de Sesbania virgata (Cav.) Poir(2024-03-11) Menezes, Mariane Oliveira; Santos, Marcone Moreira; Silva, Carlos Luiz da; http://lattes.cnpq.br/9191002336120487; http://lattes.cnpq.br/3284707164193715; http://lattes.cnpq.br/1484285198376822The present study investigated the effects of hydraulic memory on the eco-physiological aspects of germination and the initial development of S. virgata seedlings. Employing a mixed-method approach that combined quantitative and qualitative methods, along with rigorous statistical analysis including tests such as Tukey, ANOVA, and regression analysis, a randomized experiment with various treatments was conducted. Initially, a literature review was conducted to understand the species' importance and the effects of hydraulic memory. Subsequently, laboratory tests were performed to overcome seed dormancy, determine moisture content, and establish the imbibition curve. Additionally, the germination rate of seeds subjected to polyethylene glycol 6000 (PEG 6000) solution was evaluated to simulate water stress, both with seeds that underwent intermittent hydration cycle (IHC) and those that did not undergo this process. Following laboratory analyses, nursery analyses were conducted with two distinct treatments (seeds subjected to IHC and seeds that did not undergo this process), under different watering regimes. Evaluated parameters included shoot height and diameter, root size, dry and fresh weight, Dickson's quality index, biomass allocation, and seedling survival rate. The results indicated the possible presence of hydraulic memory in the seedlings and demonstrated that water deficit negatively affects germination. However, intermittent hydration showed a positive effect on seed germination under water deficit conditions, offering a promising strategy to enhance plant survival in adverse environments.Item Caracterização estrutural e condições ecofisiológicas de fragmento urbano de Floresta Atlântica usando VANT e imagem de satélite(2021-12-10) Silva, Luiz Henrique Gonçalves da; Pimentel, Rejane Magalhães de Mendonça; http://lattes.cnpq.br/6974715752532263; http://lattes.cnpq.br/0137369300045818Over the years, the Atlantic Forest vegetation has been subjected to a progressive suppression process, mainly by anthropogenic measures, directly modifying the surface and causing irreparable damage to the biodiversity of this highly important social, economic and environmental ecosystem complex. In addition, these anthropic interventions further increase the fragmentation process, which searches for knowledge regarding the ecophysiological condition of fragments of this vegetation, which are under the direct influence of anthropic effects, more relevant. Currently, a viable methodology to assess such conditions is analyses that use geoprocessing and remote sensing, which uses techniques that allow obtaining information about targets on the soil surface, assessing its spatial dynamics, estimating the height of structures, and analyzing land use and cover. Furthermore, through the Vegetation Indexes, it is possible to assess the ecophysiological condition of those being registered. Thus, the study aimed to characterize a structure and an ecophysiological condition of the vegetation of an urban fragment of the Atlantic Forest. A Unmanned Aerial Vehicles (UAV) flight was carried out over a Fragment of Dense Ombrophilous Forest in the Lowlands located in Recife - PE. These images classified the land use and cover; they estimated the number of Individuals in the Area and their Height. After that, high-resolution satellite images were slid to calculate the Normalized Difference Vegetation Index (NDVI) and the Green Chlorophyll Index (GCI). It was identified 482 non-study forest fragments, submitted to a different level of anthropization,similar to other areas of the same phytogeographic domain, oscilating between 5.14m and 33.46m height. The NDVI of the area ranged between -0.21 and 0.93, and all places where arboreal trees were identified, through photogrammetry analysis, mean ND values greater than 0.6, indicating that they are physiologically healthy. The GCI values at the points where arboreal trees were identified were above 2.37 g/m², and the highest values for this index were found in the most centralized region of the fragment under study. The value found was higher than that measured in crops. This study showed that photogrammetry is a viable method to measure the height of wanting trees, mainly due to the quality of the provided images. Moreover, the evaluation through the Vegetation Indices indicates that this vegetation is physiologically healthy and has a chlorophyll content (g/m²) estimated by the GCI, superior to homogeneous plantations of crops.Item Regeneração natural do Parque Ecológico do Gravatá, no município de Eunápolis-BA(2018) Silva, Caio Victor Santos; Marangon, Luiz Carlos; Almeida, Danilo Sette de; http://lattes.cnpq.br/7418157304387390; http://lattes.cnpq.br/6130999923981614; http://lattes.cnpq.br/7488530294972996