Research Interests:
Research Interests:
The objective of this research was to obtain the environmental perception of fishermen of Itaoca Island regarding the effects of urban/industrial expansion in Guanabara Bay on their fishing and housing spaces. Through exploratory... more
The objective of this research was to obtain the environmental perception of fishermen of Itaoca Island regarding the effects of urban/industrial expansion in Guanabara Bay on their fishing and housing spaces. Through exploratory qualitative research, it was possible to understand the interactions of these fishermen with the space in which they are inserted in Guanabara Bay and their perceptions on the externalities that reach their community. The results showed that the urban/industrial advance, resulting from the current cycle of regional development related to petroleum, has been a threat to the survival of fishing activity, both by the environmental impacts to the region’s ecosystems that significantly damage it, and by the pressure exerted on their living and fishing spaces.
Research Interests:
Nos ultimos anos, a chuva tem sido destaque, em virtude de chuvas intensas e secas, que interferem nas atividades humanas. Com base no exposto, os objetivos sao: i) avaliar o percentual de falhas na serie temporal de chuva entre 1967 a... more
Nos ultimos anos, a chuva tem sido destaque, em virtude de chuvas intensas e secas, que interferem nas atividades humanas. Com base no exposto, os objetivos sao: i) avaliar o percentual de falhas na serie temporal de chuva entre 1967 a 2013, ii) avaliar a variabilidade temporal das chuvas e espaco-temporal do indice SPI-1 na regiao do Medio Paraiba do Sul – RJ, iii) identificar os possiveis anos de mudancas no SPI-1 via teste de Pettitt e iv) relacionar os padroes de chuva e seca como o modo de variabilidade climatica ENOS. Os dados pluviometricos mensais de 27 estacoes foram usados no calculo do SPI-1. Na contagem das falhas foi aplicado o pacote “mtsdi” do ambiente R. A estatistica aplicada foi baseada na descritiva (media e CV%) e nao parametrica (Pettitt). O indice ONI baseado na regiao do ENOS 3.4 foi usado na identificacao das suas fases. Os mapas de SPI-1 utilizou interpolador IDW. Os menores percentuais de falhas ocorreram em 15 estacoes, sendo inferior a 8%. Os maiores perc...
Research Interests:
Physics and Humanities
Research Interests:
Tropical forests have different trends of succession, combining natural and anthropogenic factors. In order to identify patterns, data from studies in the Me...
Research Interests:
The objectives of this study are: (i) to evaluate the space-temporal variability of fire foci by environmental satellites, CHIRPS and remote sensing products based on applied statistics, and (ii) to identify the relational pattern between... more
The objectives of this study are: (i) to evaluate the space-temporal variability of fire foci by environmental satellites, CHIRPS and remote sensing products based on applied statistics, and (ii) to identify the relational pattern between the distribution of fire foci and the environmental, meteorological, and socioeconomic variables in the mesoregions of Minas Gerais (MG) - Brazil. This study used a time series of fire foci from 1998 to 2015 via BDQueimadas. The temporal record of fire foci was evaluated by Mann-Kendall (MK), Pettitt (P), Shapiro-Wilk (SW), and Bartlett (B) tests. The spatial distribution by burned area (MCD64A1-MODIS) and the Kernel density - (radius 20 km) were estimated. The environmental variables analyzed were: rainfall (mm) and maximum temperature (°C), besides proxies to vegetation canopy: NDVI, SAVI, and EVI. PCA was applied to explain the interaction between fire foci and demographic, environmental, and geographical variables for MG. The MK test indicated a significant increasing trend in fire foci in MG. The SW and B tests were significant for non-normality and homogeneity of data. The P test pointed to abrupt changes in the 2001 and 2002 cycles (El Niño and La Niña moderated), which contributes to the annual increase and in winter and spring, which is identified by the Kernel density maps. Burned areas highlighted the northern and northwestern regions of MG, Triângulo Mineiro, Jequitinhonha, and South/Southwest MG, in the 3rd quarter (increased 17%) and the 4th quarter (increased 88%). The PCA resulted in three PCs that explained 71.49% of the total variation. The SAVI was the variable that stood out, with 11.12% of the total variation, followed by Belo Horizonte, the most representative in MG. We emphasize that the applied conceptual theoretical model defined here can act in the environmental management of fire risk. However, public policies should follow the technical-scientific guidelines in the mitigation of the resulting socioeconomic - environmental damages.
Research Interests:
Anthropic actions have caused the degradation of Brazilian soils, especially due to reduced forest cover. The objective of this work was to evaluate soil attributes in areas under different forms of land use, located in the buffer zone of... more
Anthropic actions have caused the degradation of Brazilian soils, especially due to reduced forest cover. The objective of this work was to evaluate soil attributes in areas under different forms of land use, located in the buffer zone of the Relevant Ecological Interest Area (ARIE) Cicuta Forest, middle Paraiba do Sul Valley, Rio de Janeiro, Brazil. Eight plots (10m × 12.5m) were installed in three different forms of land use (degraded pasture area; reforestation area with native species; and a fragment of a forest area) for evaluation of chemical and biological parameters. Although the fragment of a forest area presents a greater homogeneity regarding the nitrogen, polyphenols, humidity, and pH parameters, which shows greater environmental stability in this area, the microbiological parameters showed that there is a low activity, which might be indicative of a degraded environment, probably due to the small size of the forest fragment present in the buffer zone of the Relevant Eco...
Research Interests:
O planejamento da arborização tem grande importância na gestão urbana, a fim de evitar ou minimizar os conflitos que ainda podem causar prejuízos nas estruturas públicas ou privadas. Nesse estudo foi realizado um inventário da arborização... more
O planejamento da arborização tem grande importância na gestão urbana, a fim de evitar ou minimizar os conflitos que ainda podem causar prejuízos nas estruturas públicas ou privadas. Nesse estudo foi realizado um inventário da arborização na região central de Valença, cidade turística do estado do Rio de Janeiro, com registro dos conflitos de árvores com a fiação, acesso, iluminação, portões e garagens, recuo do meio fio e serviços subterrâneos. As ruas foram categorizadas e a maior parte delas apresentou característica de via residencial (67,3%) seguida de uso misto (20,8%) e por fim uso comercial (11,9%). Do total de árvores levantadas, 45% apresentam conflitos com a fiação telefônica e 38% com a fiação elétrica, os maiores valores dentre todos os elementos urbanos. Um número bastante alto apresentou sinais de podas, indicando conflitos anteriores e demonstrando forte intervenção nestes indivíduos. Estes resultados estão de acordo com estudos realizados em diferentes espaços urban...
Research Interests:
Geography and Humanities
Research Interests:
Os objetivos deste estudo são: i) avaliar a variabilidade anual e mensal da chuva e temperatura do ar e ii) quantificar as componentes do balanço hídrico climatológico de Resende, RJ. Os dados mensais pluviométricos e temperatura foram... more
Os objetivos deste estudo são: i) avaliar a variabilidade anual e mensal da chuva e temperatura do ar e ii) quantificar as componentes do balanço hídrico climatológico de Resende, RJ. Os dados mensais pluviométricos e temperatura foram obtidos do INMET entre 1995 a 2017. As séries temporais possuíam falhas e foram preenchidas pelos pacotes do software ambiente R. Com base na estatística descritiva e exploratória aplicada na série temporal de chuva foram identificados os meses secos (maio a agosto). Os CV foram altamente variáveis ao longo da série temporal das variáveis climáticas em Resende. As menores diferenças pluviométricas anuais em Resende foram, nos percentis dos quantis de 25% e 50% da média e mediana, seguido das diferenças superior à média, nos percentis de 75% a 100% dos quantis. Houve um aumento da temperatura anual nos percentis dos quantis de 25% e 50%. O balanço hídrico climatológico mostrou uma distribuição irregular na chuva mensal, com duas estações em Resende: a ...
Research Interests:
O presente estudo foi realizado na ARIE da Floresta da Cicuta, Barra Mansa e Volta Redonda (RJ). Teve como objetivo determinar e avaliar o potencial de gestão e a Capacidade de Carga Turística da Trilha Principal da ARIE dessa UC, gerando... more
O presente estudo foi realizado na ARIE da Floresta da Cicuta, Barra Mansa e Volta Redonda (RJ). Teve como objetivo determinar e avaliar o potencial de gestão e a Capacidade de Carga Turística da Trilha Principal da ARIE dessa UC, gerando um valor estimado do número de visitantes por dia, complementando o Plano de Manejo da referida ARIE. Para a determinação de capacidade de carga turística da trilha principal da ARIE foi aplicado o método proposto por Cifuentes (1992). O presente estudo demonstrou que a trilha está, relativamente, bem alinhada com o SNUC. A Capacidade de Carga Efetiva encontrada para a trilha foi de 208 visitas x dia-1. Esse estudo poderá contribuir com o processo de atualização do Plano de Manejo da ARIE, sendo complementado com outros estudos.
Research Interests:
Research Interests:
Research Interests:
A gestão participativa e descentralizada dos recursos hídricos contribui para a tomada de decisão baseada nos interesses e saberes das partes interessadas, tornando-a mais justa e democrática. No Brasil, os Comitês de Bacia Hidrográfica... more
A gestão participativa e descentralizada dos recursos hídricos contribui para a tomada de decisão baseada nos interesses e saberes das partes interessadas, tornando-a mais justa e democrática. No Brasil, os Comitês de Bacia Hidrográfica são, desde a Lei nº 9433/97 (Lei das Águas), os espaços nos quais o Poder Público, os usuários e a sociedade civil interagem e discutem sobre um interesse comum – o uso da água e os conflitos gerados por ele, deliberando sobre a gestão hídrica de forma compartilhada. Pretendeu-se, no estudo, analisar a formação, composição e atuação do CBH-MPS na Região Hidrográfica III do estado do Rio de Janeiro, que abrange 19 municípios e cerca de 1.019.562 habitantes, assim como a participação dos diversos segmentos sociais nos processos decisórios de gestão da água. Para isso, foram analisadas as atas das reuniões plenárias ordinárias e extraordinárias, listas de presença, resoluções e regimento do Comitê no período de 2011 a 2016. No geral, todos os segmentos ...
Forest structure studies may be carried out through the diametric distribution of individuals within a population, which is defined by characterizing the number of trees per unit area and diameter class intervals. The De Liocourt's q... more
Forest structure studies may be carried out through the diametric distribution of individuals within a population, which is defined by characterizing the number of trees per unit area and diameter class intervals. The De Liocourt's q quotient can be used to assess the relationship between recruitment and mortality in forest communities because when a constant ratio occurs between the classes, it represents that the recruitment rate is similar to the mortality rate and the distribution can be considered as regular or balanced. This study aims to analyze the diametric structure of the arboreal component of a seasonal deciduous forest fragment located in the Peixe River Valley, Midwest of Santa Catarina State, Brazil. The sampled individuals were distributed in diameter classes with an amplitude of 5 cm, in which the center of the first class presented a value of 6.5 cm. Subsequently, the observed and estimated diametric distribution curves were constructed for the overall sampling...
Research Interests:
The present study aimed to determine heavy metal concentrations in the tree bark of the species Poincianella pluviosa in Volta Redonda municipality, Rio de Janeiro. Four sets of barks of eight trees with three replicates each from sectors... more
The present study aimed to determine heavy metal concentrations in the tree bark of the species Poincianella pluviosa in Volta Redonda municipality, Rio de Janeiro. Four sets of barks of eight trees with three replicates each from sectors 1 (W), 2 (S), 3 (E), and 4 (N) of the Volta Redonda center corresponding to the cardinal points were collected. The samples were digested in a nitroperchloric mixture and the lead (Pb), cadmium (Cd), nickel (Ni), copper (Cu), zinc (Zn), iron (Fe), and manganese (Mn) contents were determined by atomic absorption spectrophotometry. The cluster analysis (CA) formed 12 groups; among them, group 3 (G3) showed the presence of all seven elements in sector 1 and group 8 (G8) showed the presence of Pb, Zn, Fe, Ni, and Mn in sector 2. Kruskal-Wallis and Bonferroni tests showed that all elements presented statistically different values among the four sectors when compared with each other (p > 0.05). Sectors 1, 2, and 3 had the highest concentrations of hea...
Research Interests:
Research Interests:
Research Interests:
Geography and Humanities
The objective of this study was to evaluate the structure (horizontal and vertical) of a Deciduous Forest, located between the municipalities of Piratuba and Ipira (SC). 14.000 m2 of tree communities were analyzed, sub- divided into 14... more
The objective of this study was to evaluate the structure (horizontal and vertical) of a Deciduous Forest, located between the municipalities of Piratuba and Ipira (SC). 14.000 m2 of tree communities were analyzed, sub- divided into 14 plots of 10 x 100 m, where all individuals with DBH equal to or greater than 4.0 cm were sampled and identified. For natural regeneration were sampled 560 m2, divided into 14 plots of 10 x 4 m. In the tree strata were sampled 2.125 individuals belonging to 34 families, 80 genera and 113 species with a total density of 1.517 ind.ha-1. Natural regeneration were sampled 196 individuals belonging to 24 families and 49 species with a total density of 3.500 ind. ha-1. Luehea divaricata Mart., Actinostemon concolor (Spreng) Müll. Arg. and Parapiptadenia rigida (Benth.) Brenan had of value of increased importance (7,1%, 7,0 % and 5,3%, respectively). Actinostemon concolor got high value Relative Natural Regeneration (18,1%). The low percentage of natural rege...
Research Interests:
Research Interests:
1Engenheiro Florestal 2Departamento de Ciências Ambientais, Instituto de Florestas, Universidade Federal Rural, Rio de Janeiro, Rio de Janeiro, Brasil. 3Engenheiro Florestal *Autor para correspondência. e-mail: wkiffer@terra.com.br ...... more
1Engenheiro Florestal 2Departamento de Ciências Ambientais, Instituto de Florestas, Universidade Federal Rural, Rio de Janeiro, Rio de Janeiro, Brasil. 3Engenheiro Florestal *Autor para correspondência. e-mail: wkiffer@terra.com.br ... RESUMO. O objetivo deste trabalho foi ...
Research Interests:
Neste estudo foi realizada a avaliação da arborização de quatro praças da Tijuca, Rio de Janeiro, RJ, considerando a riqueza de espécies, análises morfométricas dos indivíduos, além do seu diagnóstico fitossanitário. Foram encontradas 310... more
Neste estudo foi realizada a avaliação da arborização de quatro praças da Tijuca, Rio de Janeiro, RJ, considerando a riqueza de espécies, análises morfométricas dos indivíduos, além do seu diagnóstico fitossanitário. Foram encontradas 310 árvores, distribuídas em 36 espécies e 14 famílias, com destaque para Cassia siamea e Delonix regia que, juntas, corresponderam a 32,4% dos indivíduos. Cassia siamea representou 9,4% dos indivíduos da Praça Castilho França, 32,3% da Varnhagen, 24,0% da Saens Pena e 11,1% da Xavier de Brito. Já Delonix regia totalizou 3,2% das espécies da Praça Varnhagen, 10,7% da Saens Pena e 35,2% da Xavier de Brito. Nas quatro praças foi encontrada uma distribuição proporcional entre as espécies exóticas e nativas. Todavia, comparando o número de indivíduos, foi constatado predomínio das exóticas. Considerando todos os indivíduos amostrados, 83,6% concentraram-se entre 5 m e 15 m de altura. Observou-se que 49,5% das árvores apresentaram DAP maiores que 30 cm. Con...
Research Interests:
Research Interests:
Research Interests:
In the present study, we conducted a tree planting evaluation in four squares of Tijuca, Rio de Janeiro, where we analyzed the species richness, diameter at breast height (DBH) and height of subjects, and we also performed a diagnosis of... more
In the present study, we conducted a tree planting evaluation in four squares of Tijuca, Rio de Janeiro, where we analyzed the species richness, diameter at breast height (DBH) and height of subjects, and we also performed a diagnosis of plant health. We found 310 individuals, distributed in 36 species and 14 families, with more emphasis on Cassia siamea and Delonix regia (32.4%). Cassia siamea represented 9.4% of the subjects of Castilho France square, 32.3% of Varnhagen square, 24.0% of Saens Pena square and 11.1% of Xavier de Brito square. Delonix regia totaled 3.2% of the species of Varnhagen square, 10.7% of Saens Pena and 35.2% of Xavier de Brito. A proportional distribution between exotic and native species was observed in the four squares investigated; however, a predominance of exotic species was found when the number of subjects was compared. 83.6% of the subjects presented height between 5 and 15 m. It was possible to observe that 49.5% of the trees showed DBH greater tha...
Research Interests:
The objective of this study was to evaluate the reverse logistics of residual vegetable oil (RVO) in the restaurants on a Park Road in Brazil by identifying their waste disposal methods and analysis of the economic and financial ratio of... more
The objective of this study was to evaluate the reverse logistics of residual vegetable oil (RVO) in the restaurants on a Park Road in Brazil by identifying their waste disposal methods and analysis of the economic and financial ratio of four reverse channel scenarios proposed by the authors: (1) private-sector transformation of RVO into biodiesel; (2) transformation of RVO into biodiesel by local cooperatives and public administration; (3) RVO reused for soap production by the private sector; (4) RVO reused for soap production by local cooperatives and public administration. The methodology used was a qualitative and quantitative research. The questionnaire applied through personal interview was the method for data collection. The analysis of the results was supported by the capital budgeting techniques: net present value (NPV), internal rate of return (IRR) and discounted payback. To determine the economic risk of each scenario, the Monte Carlo method was used. The main results sh...
Research Interests:
Grande parcela da população urbana vem buscando as ‘áreas naturais’ para prática de atividades de laser e relaxamento, o que muitas vezes pode ocasionar importantes externalidades negativas aos ecossistemas naturais. O presente estudo tem... more
Grande parcela da população urbana vem buscando as ‘áreas naturais’ para prática de atividades de laser e relaxamento, o que muitas vezes pode ocasionar importantes externalidades negativas aos ecossistemas naturais. O presente estudo tem por objetivo entender o perfil dos sócios do clube de Pesca de Piraí e também a sua percepção em trono da geração e gestão resíduos sól pessoais como: idade, sexo, escolaridade, cidade de origem, atividade profissional, frequência no clube, tempo de permanência, tipo de ocupação, bem como aquelas relacionadas com geração e destinação d sólidos, como: quantidade e tipo de resíduos gerados, formas de destinação, dentre outros. A pesquisa identificou que grande parte dos entrevistados eram do sexo masculino (96%), com idade 50 à 69 anos (50%). Aproximadamente 75% dos usuários são de um dia na área de lazer (63%). Mais de 90% dos entrevistados apontaram que o plástico, o metal e o papel são os resísuos mais frequentemente gerados, representado, respect...
Research Interests:
This study evaluated the space-time variability of fire foci via environmental satellites for the State of Rio de Janeiro (SRJ) based on statistical procedures. The fire foci in the period of 2000 to 2015 were obtained from the... more
This study evaluated the space-time variability of fire foci via environmental satellites for the State of Rio de Janeiro (SRJ) based on statistical procedures. The fire foci in the period of 2000 to 2015 were obtained from the BDQueimadas fire database. Descriptive, exploratory, and multivariate statistical analyses were performed in the software environment R i386 version 3.2.5. The north region had 6760 foci (21.11%), the south-central region had 3020 foci (9.43%), the Middle Paraíba had 6,352 foci (19.84%), the Metropolitan areas had 6671 foci (20.83%), and the Green Coast region had 292 foci (0.91%). The cluster analysis identified three homogeneous groups of fire foci (G1, G2, and G3) but did not include the municipality of Campos dos Goytacazes (NA). The G1 group (6.21 ± 0.01 foci, 57.61%) included areas throughout the state and covered the coastal region and lowlands towards the north. The G2 group (6.21 ± 0.01 foci, 34.81%) included the northern, south-central, and coastal ...