Carlos Henrique Rodrigues de Oliveira

Nutrient removal through timber harvesting can affect the long-term sustainability of forest plantations, particularly when species differ in biomass allocation and nutrient use. Understanding these differences is therefore essential for developing species-specific nutrient management strategies. This study evaluated differences in stem biomass allocation, nutrient and carbon stocks, and nutrient use efficiency (NUE) among 8.6-year-old Khaya grandifoliola, K. ivorensis, and K. senegalensis. This study was conducted in a plantation located at Reserva Natural Vale, Brazil, where five trees per species were sampled. Discs collected from the base, middle, and top of the commercial stem were separated into stemwood and stembark for chemical analyses. Biomass, nutrient and carbon stocks, and NUE were estimated, and differences among species were assessed using univariate and multivariate analyses. Macronutrient concentrations in the stembark followed the order Ca > N > K > Mg > S > P. K. senegalensis had the highest proportion of stembark (24.13%) and accumulated greater stocks of several nutrients and carbon in this compartment, as well as higher N, P, and Mg stocks in stemwood. In contrast, K. ivorensis showed the highest K and Fe stocks in stemwood, whereas K. grandifoliola accumulated the greatest amount of Ca. Stemwood carbon stocks averaged 11.77 Mg ha⁻¹ and did not differ among species. Nutrient use efficiency also differed among species, with K. ivorensis showing greater efficiency for N, Ca, Mg, and Cu, K. grandifoliola for K, Zn, and Mn, and K. senegalensis for Fe. The results revealed species-specific patterns of biomass allocation, nutrient accumulation, and nutrient use efficiency. K. senegalensis, which had the highest proportion of stembark, also accumulated greater stocks of several nutrients and carbon in this compartment, highlighting the potential value of retaining bark after harvesting to support nutrient return to the soil. However, the species-specific patterns of nutrient accumulation indicate that the implications for nutrient export depend on the element considered. These findings can inform species selection and harvesting practices aimed at improving nutrient conservation in Khaya spp. plantations.

The growth of technical–scientific knowledge is crucial for the conservation of biodiversity and the sustainable management of endangered species, particularly given the limitations in information about high-performance seedling nutrition. Controlled-release fertilizers (CRFs) have strategic advantages in terms of nutrient use efficiency and less need for reapplications. However, their use in the production of native forest seedlings is still little explored. This study aimed to evaluate the effects of applying CRFs in different doses on the growth and quality of cedro-rosa (Cedrela fissilis Vell.) seedlings, aiming to identify more efficient fertilization strategies in nurseries. The seedlings showed 100% survival at 150 days. The absence of fertilization resulted in limited growth, while increasing doses promoted significant gains. The dose of 16 g L⁻¹ provided greater height and leaf area, while 8 g L⁻¹ was sufficient for gains in diameter and robustness index. There was an increase in dry mass and chlorophylls, although stabilized at higher doses, suggesting physiological limits. Doses of between 8 and 16 g L⁻¹ of CRF are promising to produce cedro-rosa seedlings, combining gains in growth, quality, and physiological efficiency, making it a viable and sustainable alternative.

A implementação do Programa de Gestão e Desempenho (PGD) na administração pública federal insere-se no movimento de transição do modelo burocrático para práticas gerenciais orientadas por resultados, à luz da New Public Management. Este estudo analisa as limitações e oportunidades da implementação do PGD na Universidade Federal do Espírito Santo (UFES). Adotou-se abordagem quali-quantitativa, com coleta de dados primários via questionário aplicado a 137 servidores e dados secundários oriundos da análise documental de legislações, com posterior tratamento por meio de estatística descritiva e análise de conteúdo. Os resultados indicam avanços na institucionalização do programa, percepção favorável dos servidores e índice de produtividade autopercebida de 84,11%. Contudo, observou-se persistente confusão conceitual entre PGD e teletrabalho, além da ausência de métricas consolidadas para a modalidade presencial. Conclui-se que o programa apresenta potencial de consolidação institucional, mas demanda fortalecimento da cultura de gestão por resultados e aprimoramento normativo para sua plena implementação.

The increase in the vehicle fleet negatively impacts Brazilian municipalities. Understanding how it impacts Alegre, a virtual public survey was held with its licensed drivers in 2019. In 10 years, its fleet of cars and motorcycles grew faster than its stagnant municipal population growth and faster than municipalities almost four times more populous than it. In mid-2019, of about 104 respondents, 90% had cars and 44% had motorcycles, relative percentages above obtained in a similar survey in Londrina, which has 20 times its population. About 86% of interviewees considered the lack of parking to be a problem and 80% believed that limited waiting could improve urban mobility in Alegre if it had affordable prices. The increase in the vehicle fleet in Alegre causes urban mobility problems. However, its population receives the implementation of a limited waiting system well, contributing to the implementation of public management practices. However, implementing limited waiting alone is insufficient; some Brazilian municipalities combined the implementation of the system with awareness-raising and (re)education of drivers and education of children.

Communication in Public Higher Education Institutions (IESP) with distant campuses is compromised by distance. Managing communication in these institutions is important because they are places for knowledge creation. This study sought to discover if there are guidelines that address communication strategies in public institutions. We verified if the Universidade Federal do Espírito Santo (UFES) has adopted any of these strategies, as it has four campuses and almost 30 teaching centers. Communication should be used strategically and value the human factor of an institution. Therefore, some principles were pointed out regarding what communication is, its types, models, theories, and the result of its articulation with universities. In 2020, UFES adhered to the United Nations (UN) 2030 Agenda for Sustainable Development and began to use communication aimed at the institution’s sustainability. Internal communication is suitable for management, as it values the institutional culture and engagement, contributing to the construction of a cohesive organizational environment oriented towards collective goals, especially when directed at the internal public.

The problems of flooding are recurrent due to natural river overflows and inappropriate occupation of riverbank areas, leading to numerous economic and social losses. The municipality of Alegre, located in the southern region of the state of Espírito Santo and part of the Itapemirim River basin, frequently suffers from these types of disasters. In this context, areas with flooding potential were mapped for the municipality of Alegre-ES, including the districts of Rive, Celina, and Café, using an unmanned aerial vehicle (UAV) as a data collection tool. For the development of the study, pluviometric data were collected, and a rainfall map was generated. Using the UAV, orthophotos of the area of interest were collected, and a Digital Surface Model (DSM) was created. Finally, flood points were calculated, and cross-sectional profiles were delineated, resulting in the flood map for the event that occurred in 2022. The results showed that during periods of intense precipitation, areas near the river are affected by flooding. This work highlights the importance of the UAV tool for obtaining DSMs, enabling the creation of detailed flood maps, which are fundamental for environmental risk prevention and control.

VoIP University is a solution to enable the development of communication projects based on IP protocol. This paper presents a low-cost deployment called VoIP UEMA, the first project of VoIP University solution. The technical feasibility of this project was checked as proof of concept. The concept was proven showing it is possible to create user extensions with some information such as name, ID, job role, course, center, and campus getting information of all registered users in the academic and administration system server to make voice and video calls through Android application and browser web phone. A mean opinion score test that measures subjective voice quality for a call was done with 35 people calling each other using two VoIP UEMA softphones, VoIP UEMA application, and VoIP UEMA web phone. The result achieved a weighted average of 3.5, indicating good-quality calls. The low-cost aspect was justified by a financial analysis showing the annual phone bill expenses dropped, representing savings of over 97 %.

The Juçara palm (Euterpe edulis Mart.) is a native species of the Atlantic Forest biome, with high commercial value due to, among other uses, the extraction of the palm heart and pulp. This species has essential ecological interaction with fauna, providing food for many frugivorous species. However, it is on the list of endangered species, mainly due to the disorderly exploration of the palm tree for the extraction of the palm heart, but also due to climate change, habitat fragmentation, and defaunation. In this context, understanding which areas are suitable to grow this species is important for planning and supporting decision-making, as well as delimiting areas environmentally suitable according to the optimal requirements of species and land-use occupation. Our aim was to identify the suitable areas to cultivate Juçara palm in the State of Rio de Janeiro and provide a set of supporting maps and information for this productive sector, to increase agroforestry systems, or even for forest conservation and restoration purposes. Environmental parameters for the species (soil, elevation, air temperature and rainfall), and land use and land cover were assessed in order to perform the mapping of the optimal areas. The results indicate a potential for cultivation of Juçara palm in the State of Rio de Janeiro. All regions of the State have suitable areas, especially the Médio Vale do Paraíba, Centro–Sul, and Baixadas Litorâneas. The most restrictive variables to grow Juçara Palm in Rio de Janeiro State were rainfall and inadequate land use/cover for planting. Keywords: environmentally suitable areas, geoprocessing, Juçara palm, planning.

The Doce River, located in Southeast Brazil, is of great importance in supplying water for urban use, agriculture, fishing and other purposes. It was affected by a disaster that occurred on November 5, 2015 due to the collapse of the Fundão ore tailing dam, in the municipality of Mariana (MG). This disaster generated socio-environmental consequences, as some regions were severely affected due to the waste released in the river, which was considered potentially toxic in the short to long term. This work presents a temporal analysis of images from the Landsat 8 satellite, associating the aspects of rainfall in dry and rainy months, in years before and after the disaster (2014, 2015, 2016, and 2020), together with the Normalized Difference Water Index (NDWI) obtained by image digital processing, to analyze the relation between dry and rainy periods and the spectral response of images. This analysis allowed the understanding of the behavior of the suspended materials, before and after the disaster, to unravel how the dispersion of tailings occurs. Part of the ore tailing that was deposited along the river went into suspension again in the rainy season one year after the disaster and, five years after, the satellite images show no difference compared to pre-disaster conditions. But, seven years after the spill, there are still iron ore tailings deposited and mixed with the river sediments. The fluvial dynamics are incorporating the tailings into the sediments, originating conducive places to provide various types of metals adhered to the particulate matter. Keywords: iron ore tailings, rainfall, remote sensing.

O objetivo deste trabalho foi avaliar a qualidade e o crescimento morfológico das mudas de sobrasil (Colubrina glandulosa Perkins) sob o método de repicagem, em comparação com o semeio direto. O experimento foi realizado em uma casa de vegetação no Ifes - campus de Alegre, sendo estabelecidos dois tratamentos, 1 - semeio direto e 2 - repicagem. As mudas do tratamento 2 foram repicadas aos 30 dias após a germinação. As mudas produzidas por semeio direto e repicagem foram comparadas quanto suas características morfológicas, aéreas e radiculares, o índice de qualidade de Dickson, índice SPAD e nutrientes foliares. O experimento foi disposto em blocos casualizados (DBC), com 20 plantas para cada repetição e 3 repetições, totalizando 120 plantas. Todos os dados foram analisados pelo teste de variância (ANOVA) ao nível de 5% de significância. Mediantes os resultados encontrados, com poucas diferenças significativas para a maioria das características analisadas nos tratamentos, a repicagem se mostra uma alternativa viável para a produção de sobrasil, pois não compromete a qualidade das mudas, e ainda se aproveita todas as sementes germinadas e as plântulas que seriam descartadas no raleio.