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Mostrando 1-12 de 81 artigos, teses e dissertações.
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1. Floristic structure and composition of Guadua forests in the Colombian coffee region1
RESUMO Na região cafeeira (900-2.000 m de altitude) dos Andes colombianos, os remanescentes florestais correspondem, principalmente, a fragmentos dominados pela espécie de bambu Guadua angustifolia Kunth (Guadua). Essas florestas altamente fragmentadas são encontradas em paisagens com alto grau de transformação devido à atividade agrícola e à expans�
Pesqui. Agropecu. Trop.. Publicado em: 25/11/2019
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2. GENETIC DIVERSITY AMONG AND WITHIN BRAVE BEAN (Capparis flexuosa L.) POPULATIONS ASSESSED USING RAPD MARKERS
RESUMO O feijão-bravo (Capparis flexuosa) é uma espécie nativa da Caatinga e é utilizada como forrageira, principalmente na estação seca onde parte das espécies vegetais perdem suas folhas. Objetivou-se estudar a diversidade genética dentro e entre populações de feijão-bravo usando marcadores RAPD. O estudo foi realizado no Laboratório de Biotecn
Rev. Caatinga. Publicado em: 09/05/2019
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3. ASSOCIATIONS BETWEEN DENGUE AND SOCIO-ENVIRONMENTAL VARIABLES IN CAPITALS OF THE BRAZILIAN NORTHEAST BY CLUSTER ANALYSIS
Resumo Este artigo busca identificar, nas capitais do Nordeste brasileiro, o nível de similaridade entre dengue e variáveis climáticas, sociodemográficas e de saneamento, entre 2001-2012, através da análise de agrupamentos, uma técnica explanatória usada sobre dados multivariados para verificar o inter-relacionamento entre grupos formados pelas dist�
Ambient. soc.. Publicado em: 31/01/2019
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4. Spatial Variability of Soil Fauna Under Different Land Use and Managements
ABSTRACT Geostatistics allows the evaluation of the distribution pattern of data with high spatial variability in agricultural systems. This study aimed to evaluate the spatial variability of biological diversity indices of soil fauna under different land (agriculture and forest). Samples were collected in seven areas (millet, soybean, corn, eucalyptus, past
Rev. Bras. Ciênc. Solo. Publicado em: 28/05/2018
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5. Diversity of Drosophilidae (Insecta, Diptera) in the Restinga forest of southern Brazil
Abstract Although members of Drosophilidae are frequently the topic of ecological studies in Brazil, few have explored Restinga or, until only recently, Pampa biome environments. This study proposes to describe the diversity and temporal variation of the Drosophilidae assemblage from a Restinga forest of Rio Grande do Sul, Brazil. We performed monthly collec
Rev. Bras. entomol.. Publicado em: 2017-09
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6. SPATIAL CORRELATION OF SOYBEAN PRODUCTIVITY, ENHANCED VEGETATION INDEX (EVI) AND AGROMETEOROLOGICAL VARIABLES
ABSTRACT The survey information from growing regions, the interaction with the vegetation index and climatic variables is of great importance in the search for soybean productivity increase. Paraná is the second largest soybean producer in Brazil and presents great spatial variability, both in periods of the crop cycle as in soil and climate. The objective
Eng. Agríc.. Publicado em: 2017-06
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7. The HPLC Fingerprint Analysis of Selected Cirsium Species with Aid of Chemometrics
Twelve Cirsium sp. methanolic extracts were analyzed using high-performance liquid chromatography gradient elution method with run time of 45 min. Four Kinetex (150 × 4.6 mm) chromatographic columns (C18 5 µm, C18 2.6 µm, pentafluorophenyl 5 µm, phenyl-hexyl 5 µm) and mobile phase consisting of methanol/water/formic acid 1% were used. Eight standards (n
J. Braz. Chem. Soc.. Publicado em: 2016-10
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8. Rhizobial characterization in revegetated areas after bauxite mining
Abstract Little is known regarding how the increased diversity of nitrogen-fixing bacteria contributes to the productivity and diversity of plants in complex communities. However, some authors have shown that the presence of a diverse group of nodulating bacteria is required for different plant species to coexist. A better understanding of the plant symbioti
Braz. J. Microbiol.. Publicado em: 2016-06
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9. Orchidaceae in an Atlantic Forest area: floristics and similarity to other Dense Ombrophilous Forest fragments
The Brazilian Atlantic Forest is considered a global hotspot for biodiversity although it is currently threatened and highly fragmented. Orchidaceae in this phytogeographical domain is represented by 148 genera, of which 142 are endemic; Rio de Janeiro State contains approximately one third of all Brazilian orchid species. The Wildlife Protection Zone of the
Acta Bot. Bras.. Publicado em: 2015-03
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10. Mosquito community composition in dynamic landscapes from the Atlantic Forest biome (Diptera, Culicidae)
Mosquito community composition in dynamic landscapes from the Atlantic Forest biome (Diptera, Culicidae). Considering that some species of Culicidae are vectors of pathogens, both the knowledge of the diversity of the mosquito fauna and how some environment factors influence in it, are important subjects. In order to address the composition of Culicidae spec
Rev. Bras. entomol.. Publicado em: 2014-03
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11. Phytoplankton diversity in the middle Rio Doce lake system of southeastern Brazil
This study presents results of the inventory of algal flora conducted between August 2007 and May 2008 in 18 lakes of the middle Rio Doce lake system, most of which is in the state of Minas Gerais, Brazil. We recorded 481 taxa, increasing the known total phytoplankton diversity of the region (gamma diversity) by 80%. The following classes were represented: Z
Acta Bot. Bras.. Publicado em: 2013-06
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12. ANÁLISE DA VEGETAÇÃO EM UM FRAGMENTO DE CAATINGA NO MUNICÍPIO DE PORTO DA FOLHA, SERGIPE, BRASIL. / ANALYSIS OF VEGETATION IN A SHRED OF THE MUNICIPALITY OF PORT CAATINGA LEAF, SERGIPE, BRAZIL.
O presente trabalho foi realizado em um fragmento de Caatinga com aproximadamente 50 ha, pertencente à fazenda São Pedro, localizada no município de Porto da Folha, Sergipe, objetivando conhecer a composição florística e a estrutura fitossociológica do componente herbáceo e arbustivo-arbóreo, verificar as relações fitofisionômicas do estrato arbu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/06/2012