https://repositorio.ufra.edu.br/jspui/handle/123456789/156 Programa de Pós-Graduação em Ciências Agrárias (Agroecossistemas da Amazônia) - Extinto. Thu, 09 Apr 2026 10:21:32 GMT 2026-04-09T10:21:32Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2830 Título: Análise espacial de Euxylophora paraensis Huber na Amazônia Oriental. Autor(es): BRANDÃO, Alessandra Daniele de Sousa Abstract: The mechanisms of sustaining managed forests are not yet adequately addressed. And above all, if these species are not managed differently from the others, they risk extinction in the medium and long term. Ewxylophora paraensis (Huber), because of the high index oflogging, this species has suffered population reduction, being potentially susceptible to the impacts of the exploration, its large trees are listed in the Brazilian flora species list threatened with extinction. However, the spatial structure of its natural populations and the effects of management on this species are unknown. Therefore, the objective of the study was to characterize and quantify the spatial distribution of Euwxylophora paraensis in order to establish conservation and preservation strategies in the Eastern Amazon. The study was carried out at the farm Rio Capim, Cauaxi, Sumal and Caculé Farm Management Units owned by CKBV Florestal Ltda., Belonging to the CIKEL Group. The company has six forest management units in the state of Pará certified by the Forest Stewardship Council (FSC) since 2001. To evaluate the spatial distribution of E. paraensis, geostatistical analysis was used from the semivariogram modeling and mapping of kriging. There was spatial dependence of E. paraensis described by the spherical model, showing an aggregate distriution pattern of the species. It is observed in the kriging maps the dispersion tendency of E. paraensis in the studied areas, from a region with a higher concentration of trees and influenced by higher altitudes to one of lower concentration with low altitudes. Euxylophora paraensis presented an aggregate distribution pattern in the studied forest possibly due to its baroque dispersion syndrome, with spatial dependence described by the spherical model and significant differences, in relation to the topographic variable, being recommended to take into account the altitude variable to predict the most the possible occurrence of the species. Fri, 20 Feb 2026 00:00:00 GMT https://repositorio.ufra.edu.br/jspui/handle/riufra/2830 2026-02-20T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2829 Título: Fenologia, prospecção fitoquímica e manejo da poda em ramos de Jaborandi (Pilocarpus microphyllus Stapf ex Holmes.). Autor(es): OLIVEIRA, Cristiany Sally Albuquerque de Abstract: Among the plants that have proven medicinal effects, jaborandi (Pilocarpus microphyllus Stapf) plant is considered a priority in conservation programs. Among the thirteen species occurring in Brazil, P.microphyllus is known to possess true jaborandi by higher concentrations of pilocarpine in its leaves, an imidazole alkaloid, whose main action occurs in treatment of glaucoma and therefore is the most heavily used. The study aimed to: perform phenological study accesses the Active Germplasm Bank of Jaborandi (BAG- Jaborandi), the phytochemical screening of leaves jaborandi evaluate and compare distances cuts branches to harvest leaves jaborandi. The study area for the assessment of plant material was the Active Germplasm Bank of Embrapa Amazônia Oriental Jaborandi, located in the municipality of Belém - PA. For phenological assessments, records were collected four hits (Merck grown in full sun and shade, Japanese and Bonal 4 grown in full sun) daily for a period of 24 months, corresponding to the years 2010 to 2012, five plants/ access and arranged for monthly statement through records with respective numbers of plants, with a record of presence or absence of flowering and fruiting phenophases. The determination of the dry weight of the samples of the accessions was performed at the Laboratory of Agro Embrapa Eastern Amazon. In carrying out pruning the same accessions were used. The harvest of leaves was performed manually with the aid of pruning shears, performing - it cuts branches, respectively, 10 and 20 cm away, not to cause physical damage to plants, and also enable its regeneration. The plants of each access, recorded and identified were evaluated every 10 days after the first pruning of the branches, to determine the number of leaves and length of the longest sprout, shoot number, total number of leaves per cutting and regeneration time for the second pruning. The experimental design was completely randomized, factorial involving three experiments. The results showed that flowering occurred throughout the year and fruiting in eleven months of the year. The phytochemical screening revealed the presence of 11 classes of chemical constituents. Distances cutting benefited launching new branches without affecting the development of the plant, and from 10 months to perform the pruning of the branches, the system of the unshaded responded with greater efficiency regardless of the distance cut made. Performing consecutive pruning favored leaf production, increasing productivity without harming the plant development. Thu, 19 Feb 2026 00:00:00 GMT https://repositorio.ufra.edu.br/jspui/handle/riufra/2829 2026-02-19T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2826 Título: Dinâmica e complexidade da paisagem do projeto de assentamento Benfica, sudeste paraense. Autor(es): SAMPAIO, Sandra Maria Neiva Abstract: Due to various human activities the recent occupation of Amazonia has resulted in relevant changes in the landscape and loss of biodiversity. One of the most critical areas of deforestation is the Southeast Pará Mesoregion which is under the pressure of the agricultural frontiers. In this context, this study aimed to examine the dynamics and complexity of the landscape of the Benfica Settling Project (PA-Benfica), which represents a critical area of deforestation caused by agriculture during the settlement process. The study approach includes a range of information about the field of Landscape Components (constituent elements as: forest, secondary forest, pasture, etc.), and Landscape Types (representing a portion of an homogeneous area and coherent with the arrangement and the frequency of its components). This methodological strategy required a geographical approach to understand the context related to definition of a landscape typology and the aspects of its dynamics and complexity. It was used in this work process some products and techniques of remote sensing and geo orbit. Satellite images from Landsat-TM were purchased for five different dates (1987, 1992, 1996, 2001 and 2005) and analyzed by SPRING system, being considered the supervised classification by regions for space analysis dynamics. The use of integrated remote sensing with Geographic Information System (GIS), a field of intense work, as well as landscape theoretical models, endorsed the identification and characterization of 10 Components of Landscape. These components represented the following vegetation cover and land use patterns: Forest Remnant (CP1); Gallery Forest (CP2); Wetlands (CP3); High Secondary Forest (CP4); Secondary Forest with Solanum (CP5); Low Secondary Forest (CP6); Pasture with Woody Plants (CP7); Field with Babaçu Palm (CP8); Pasture with Babaçu Palm (CP9); and Clean Field (CP10). The area of Forest Remnant (CP1) component presented 60% of deforestation during the period 1987-2005: For the same period, the areas of secondary forest and pasture showed an expansion of 30%, respectively. In addition to these results, it was also identified, defined and characterized five different Landscape Types: Forest (TPO), Agriculture Mosaic (TP1), Agricultural Mosaic with Pasture (TP2), Large Extents of Pasture (TP3), Large Extents of Pasture with Babaçu (TP4) and Babaçu Forest (TP5). The results showed that in the dynamic process occurred the conversion from forest to pasture, when the highlight landscapes were Large Extents of Pasture (TP3), Large Extents of Pasture with Babaçu (TP4) and Babaçu Forest (TP5). Doing the integration of both information it was possible to devise a specific scale of complexity for both Components of the Landscape, as well as for Types of Landscapes, to estimate the complexity degree of the landscape from the simplest (0) to the more complex (12), and based on three indicators of the internal structure and on the order of plant formations: Indicator of Diversity, Indicator of Stratification and Indicator of Transformation. The intensity degrees of greater complexity match to the landscape types Forest (TPO), Agriculture Mosaic (TP1) and Agricultural Mosaic with Pasture (TP2). The median level refers to the landscape type Large Extents of Pasture with Babaçu (CP4), while the lower level of intensity is associated with Large Extents of Pasture (TP3). From these results 1t was possible to assess the evolution of the complexity of all landscape types for the dates considered in this study. The set of results point out that the landscape types can be considered and evaluated regarding to a greater or lesser environmental impact which are directly related to a range of degrees of complexity of its components. Thus, they may be used as units for territorial management on the application of public policies concerning to land use planning and biodiversity conservation. Tue, 10 Feb 2026 00:00:00 GMT https://repositorio.ufra.edu.br/jspui/handle/riufra/2826 2026-02-10T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2825 Título: Morfoanatomia, fisiologia e tecnologia de propágulos de Dalbergia spruceana Benth (Leguminosae-Caesalpinioideae). Autor(es): FREITAS, Alessandra Doce Dias de Abstract: Dalbergia spruceana Benth, also known as Rosewood of Pará, belongs to a Fabaceae family and is spread between the states of Pará, Amazonas, Amapá and Rondônia. It can be found in short dry forests and some open fields. Dalbergia spruceana Benth, commonly known as Jacarandá do Pará, belongs to the Fabaceae family, distributed throughout the states of Pará, Amazonas, Amapá and Rondônia. It inhabits the drought woods not too tall and some open fields. The aim of this study was to evaluate the physiological and technological quality, describing the anatomy of seeds and propagating morphology of Jacarandá do Pará. The study was conducted at the Forest Seeds Laboratory (Eastern Amazonia EMBRAPA) and Plant Anatomy Laboratory (Emílio Goeldi Museum of Pará). The terminology and methodology were established for each area. The electrical of conductivity test shows to be promising to 70 ml with water in one hour period, at about 25º C. The acid gibberellic treatment do not represent an alternative in the seedling formation process. The viability and force of seeds were affected by the increase in accelerated ageing chamber time. The fruits and seeds presented variability of the biometric features, and found no similarity about length, width and thickness, as compared with the other species of the same genus. The germination test was conducted at the temperatures of 25º and 30º C into the vermiculite substrate. Morphologically the fruit is samara-type, dry, indehiscent, glabrous, coriaceous, non-segmented, plane, and the seeds are kidney shape, flattened, glabrous, with a thin brown membranous, slightly rough surface, with yellow staining, after being removed tegument. The germination is epigeous fanerocotiledonar type, with tegument adhered to the cotyledons in the growth period of the plant. Anatomically the seeds are composing of tegument in three layers. The exotest presents anticlinal walls and extern periclinal with reticulated thickening, uniseriate, thin and delicate intern periclinal, with cellulose presence. Tue, 10 Feb 2026 00:00:00 GMT https://repositorio.ufra.edu.br/jspui/handle/riufra/2825 2026-02-10T00:00:00Z