Navegando por Autor "SILVA, Rommel Benicio Costa da"

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Acesso aberto (Open Access)
Regime térmico e hídrico do solo para área de floresta tropical em anos de El Niño e La Niña, Caxiuanã-PA: estudo de caso
(2011-09) SANTOS, Sergio Rodrigo Quadros dos; SILVA, Rommel Benicio Costa da; BARRETO, Priscilla Nascimento; NUNES, Hildo Giuseppe Garcia Caldas; RODRIGUES, Ronaldo da Silva; CAMPOS, Thamiris Luisa de Oliveira Bradão
The thermal and hydrologic regime to soil if behave differently in years of occurrence of El Niño, La Niña and that non-occurrence about both (El Niño and La Niña). To study these behaviors, we used data of the hourly total and monthly of rainfall, average hourly and monthly data of soil temperature at depths of 2 cm and 10 cm and soil moisture at depths of 5cm and 20cm, for years the events searched. The results show that the year was about the influence of El Niño had higher temperature and lower values of soil moisture when compared with the year that was on the influence of La Niña. On the other hand the years that there is no occurrence of the phenomena El Niño and La Niña, showed values of soil temperature (moisture) higher (smaller) than the La Niña year, but smaller (higher) than the year of El Niño.
Acesso aberto (Open Access)
Relação entre o clima, a densidade de mosquitos em floresta e a distribuição de endemias na Amazônia Oriental.
(Universidade Federal do Pará, 2021-04-15) SILVA, Rommel Benicio Costa da; VITORINO, Maria Isabel; http://lattes.cnpq.br/4813399912998401; https://orcid.org/0000-0003-3253-5301; SOUSA, Adriano Marlisom Leão de; http://lattes.cnpq.br/4371199443425884; https://orcid.org/0000-0002-2809-5318
The climate in the Amazon has been changing, mainly due to human activities causing the proliferation of insects, responsible for the spread of diseases, is influenced by the behavior atmospheric variables. The Caxiuanã National Forest, which is a conservation unit (CU) that presents between 80% and 85% of upland primary forest, having high diversity and species richness. In this context, this study aims to understand the influence of climate change on the density of mosquitoes and on the spread of endemics in the forest region and its surroundings in the Eastern Amazon. For that, climatic data obtained from BDMET / INMET (1978 to 2017) and at the LBA Tower installed at the Ferreira Pena Scientific Station (ECFPn) were used, Pacífic (IOS) and Atlantic (MMA) climatic indexes on the NOAA website and morbidity data on the SAGE/MS website. The results show statistics compiled between climate, Malaria (MAL), dengue (DNG) and American cutaneous leishmaniasis (ACL) that affect the region during the period from 2001 to 2017. The climatic variability shows an increase (per decade) in its levels, with a reduction in the humidity indexes of the air, showing that changes in land use and cover denote changes in the climate, with greater influence of the Pacific indicator over the region's rains. The statistical correlations between climate variability showed a non-linear correlation both with the density of mosquitoes and with endemics. The eigenvectors indicate that the variables that most influenced endemic diseases were air temperature and rain. In view of this scenario, we conclude that the region showed significant variation in climatic indices, contributing to increases in the average air temperature indices in primary forests, causing a significant increase in the density of vector mosquitoes, tending to increase the number of morbidities in the region.
Acesso aberto (Open Access)
Variabilidade quantitativa de população microbiana associada às condições microclimáticas observadas em solo de floresta tropical úmida
(2011-12) RODRIGUES, Hernani José Brazão; SÁ, Leonardo Deane de Abreu; RUIVO, Maria de Lourdes Pinheiro; COSTA, Antonio Carlos Lôla da; SILVA, Rommel Benicio Costa da; MOURA, Quêzia Leandro de; MELO, Ivan Fiuza de
This study is a proposal for a scientific contribution to the understanding of the interrelationships between density population of soil microorganisms associated with seasonal microclimatic variability in tropical rainforest, also considering a case study of extreme event. Some organisms, especially soil microorganisms are very sensitive to small variations in microclimate (sun light, temperature, soil moisture, wind, sensible heat, latent heat, etc). Surely these conditioning factors are important for understanding the spatial distribution of these living things in natural ecosystems, inhabited by a variety of microorganisms (mushroom and bacteria) that were studied for their distribution and density, using the technique of "Pour Plate" count of "Petri plates" following the methodology utilized for De-Polli and Guerra, described by Clark. This study was conducted in two experimental areas PPBio (natural rainforest area) and ESECAFLOR (one acre covered area to simulate drought) in Caxiuanã-PA, with continuous measurements of microclimatic variables such as temperature, humidity and rainfall, and the evaluation of spatial and temporal distribution patterns of the species abundance and richness, to establish a monitoring procedure of soil fungi and bacteria associated with climate variability in the national forest Caxiuanã. The experimental areas are predominantly Yellow Latossol soils. Microbiological analysis showed that fungi developed better during the dry season and bacteria during rainy season, and their populations decrease with depth, except in a changed environment. Correlation values between seasonal variation of fungi and bacteria population and varying temperature and soil humidity were satisfactorily for any season in both sites.