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Search Results: 1 - 10 of 21033 matches for " Geraldo Wilson Afonso Fernandes "
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Gall-inducing insects in terra firme forest and reforested areas in eastern Amazon, Pará, Brazil
Emmanuel Duarte Almada,Geraldo Wilson Afonso Fernandes
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2011,
Abstract: For the first time, data on the occurrence and richness of gall inducing insects and their host plants in a terra firme forestin the Oriental Amazon region, Porto Trombetas, Pará, Brazil are presented. In 1981 the mining company Minera o Rio do Norte, started a restoration project with native species in areas mined for bauxite. Samples of galls were taken in the dry and the wet seasons of 2002; in 36 reforested sites (from recently planted to 21 years) and in seven primary forest sites. Three hundred and nine different morphotypes of insect galls on 255 host plant species belonging to 45plant families were recorded. The most frequent galling taxa were Diptera of the Cecidomyiidae family (97%), followedby Coleoptera, Hymenoptera, and Lepidoptera. The host plant families most attacked by galling insects were: Fabaceae (87), Chrysobalanaceae (12), Burseraceae (18), Annonaceae (15), Clusiaceae (15), Euphorbiaceae (9), Melastomatacaeae (13), Malpighiaceae (17), Anacardiaceae (11), and Apocynaceae (7). The data indicate a high richness of gall inducing insects when compared to other vegetation types in Brazil (e.g., cerrado and Atlantic rain forest).
Ocorrência e caracteriza??o de galhas entomógenas na vegeta??o do campus pampulha da Universidade Federal de Minas Gerais
Fernandes, Geraldo Wilson Afonso;Tameir?o Neto, Eugênio;Martins, Rogério Parentoni;
Revista Brasileira de Zoologia , 1988, DOI: 10.1590/S0101-81751988000100002
Abstract: in this study, 37 morphologically different types of insect galls was obtained in 22 tree and shrub species from one secondary successional area at the campus-pampulha of universidade federal de minas gerais, belo horizonte, minas gerais - brazil, from august 1980 to december 1982. the cecidomiids are the most important gall-makers. they are founded in the leaves in all the plant species surveyed. the galls external morphologies are highly variable, however the inside aspect are uniform. the gall numbers are variable a mong the plant species. however, the cavity and larvae per cavity numbers is commonly one. several dipterocecidian parasitoid families are also included in this survey.
The potential of natural regeneration of rocky outcrop vegetation on rupestrian field soils in "Serra do Cipó", Brazil
Medina, Branca Maria Opazo;Fernandes, Geraldo Wilson;
Brazilian Journal of Botany , 2007, DOI: 10.1590/S0100-84042007000400011
Abstract: an area's innate potential to regenerate represents a crucial factor for its conservation and management. the seed rain and seed bank are important agents in the regeneration process. seed banks are particularly important in communities where there is a high proportion of obligate seeders. rocky outcrops are habitats where most part of the plant species depends on their seeds to reproduce and maintain viable populations. therefore, seed banks ought to be important in this vegetation physiognomy. we test the hypotheses that the seed bank of the rocky outcrops found in the rupestrian fields of "serra do cipó", brazil, is richer in species and denser than those formed on different vegetation physiognomies neighboring the outcrops. we then compared species abundance, species richness and composition in the rocky outcrops' seed banks with those of sandy and peaty bogs, forests, gallery forests, and "cerrados". furthermore, we report on the natural regeneration potential of these soils by assessing a greenhouse study on seedling emergence. soil samples were collected from 0 to 5 and 5 to 10 cm of depth. rocky outcrops had the poorest in species and less dense seed bank and showed segregation in species composition. emergence was greater in the most superficial layer. however, soils on rocky outcrops showed the greatest proportion of endemic threatened species in their seed banks, demonstrating their importance for biodiversity conservation of the "serra do cipó" rupestrian fields.
A new genus and species of gall midge (Diptera, Cecidomyiidae) associated with Parkia pendula (Fabaceae, Mimosoideae)
Maia, Valéria Cid;Fernandes, Geraldo Wilson;
Revista Brasileira de Entomologia , 2006, DOI: 10.1590/S0085-56262006000100001
Abstract: parkiamyia paraensis, a new genus and species of cecidomyiidae that induces galls on parkia pendula is described (larva, pupa, male,female and gall) based on material from pará (brazil).
CAN FUTURE STUDIES TRULY PREDICT THE FUTURE? A RETROSPECTIVE ANALYSIS OF TWO APPROACHES OS ESTUDOS DO FUTURO PODEM REALMENTE PREVER O FUTURO? UMA ANáLISE RETROSPECTIVA DE DUAS ABORDAGENS
Renata Fernandes Galhanone,Geraldo Luciano Toledo,José Afonso Mazzon
Future Studies Research Journal : Trends and Strategies , 2011, DOI: 10.7444/future.v3i2.77
Abstract: Futures Studies are one valuable tool to help businesses develop their Strategic Planning, in their ability to point out environment-induced changes in company policies, goals and actions. Companies and their leaders may discover energies and resources when they achieve a holistic, long range worldview, which helps them foresee, plan for and deal with the changes that will affect their future. The aim of this article is to examine the currentness of two exemplars of Futures Studies with distinct methods: a quantitative study analyzed by Mario Henrique Simonsen, and a qualitative futurology essay by Alvin Toffler based on the analysis of social, economic, technological and political trends and phenomena. A bibliographical research on secondary macroeconomic and sociocultural data supplied evidences for the projected trends. Based on this, the limitations of projection-based methods are discussed, as well as the advantages of using a qualitative or mixed approach when forecasts are made for the long term. It is worth reinforcing that the purpose of Futures Studies is not to predict with absolute precision how tomorrow will be like, but to produce indications so that adequate strategic decisions can be made today in an uncertain and turbulent environment. No campo da Administra o de Empresas, os Estudos do Futuro figuram como instrumento valioso para auxiliar a desenvolver o Planejamento Estratégico, ao apontar as mudan as induzidas pelo meio ambiente nas políticas, metas e a es das empresas. As empresas e suas lideran as podem descobrir recursos e energias quando adquirem uma vis o de mundo holística e de longo prazo, o que lhes permite prognosticar, planejar e lidar com as mudan as que afetar o o futuro. Neste trabalho objetiva-se examinar a atualidade de dois exemplares de Estudos do Futuro, comparando as tendências previstas e suas evidências atuais. Na análise foram focalizados dois estudos com abordagens metodológicas distintas: um estudo quantitativo, analisado por Mario Henrique Simonsen, e outro, qualitativo, de Alvin Toffler, apoiado na análise de tendências e fen menos sociais, econ micos, tecnológicos e políticos. Evidências relativas às tendências projetadas foram levantadas por meio de pesquisa bibliográfica de dados secundários macroecon micos e socioculturais. Com base nessa análise, discutem-se as limita es dos métodos baseados em proje es e as vantagens de utilizar abordagens qualitativas ou mistas quando o horizonte de previs o envolve o longo prazo. Vale sinalizar que o propósito dos Estudos do Futuro n o é vaticinar com absoluta pr
Seed germination ecophysiology of the wild pineapple, Ananas ananassoides (Baker) L.B.Sm. (Bromeliaceae)
Silveira, Fernando Augusto Oliveira;Santos, Jean Carlos;Fernandes, Geraldo Wilson;
Acta Botanica Brasilica , 2010, DOI: 10.1590/S0102-33062010000400026
Abstract: in this study we investigated the effects of light, temperature, and storage on seed germination of the wild pineapple ananasananassoides, an understorey species found in cerrado woodlands. seeds were germinated at temperatures of 15, 20, 25, 30 and 35 oc and a 12-hr photoperiod and continuous darkness for 30-d. seeds were photoblastic and the optimum temperatures for germination were 25 and 30 oc. seeds stored for 12-mo at room temperature and at 4 oc were set to germinate at optimum conditions. germinability of stored seeds did not differ from that of recently collected seeds, regardless of storage temperature, indicating their physiological potential for seed bank formation. our results suggest that as in tropical rainforests, light may be an important factor controlling recruitment from seed banks for small-sized species from the cerrado woodlands.
Comunidades de insetos galhadores (Insecta) em diferentes fisionomias do cerrado em Minas Gerais, Brasil
Gon?alves-Alvim, Silmary J.;Fernandes, Geraldo Wilson;
Revista Brasileira de Zoologia , 2001, DOI: 10.1590/S0101-81752001000500025
Abstract: studies on the communities of galling insects and their host plants were performed in three "cerrado" physiognomies that occur in minas gerais: "campo sujo", "cerrado" sensu strictu, and "cerrad?o". galls and host plants were collected along transects in a total of 3,000 herbs, 300 shrubs and 135 trees in each physiognomy. ninety two species of galling insects (morphotypes) on 62 host plant species of 28 families were found. the highest galling insect richness was observed in the "cerrado". approximately 75.0% of galling insects belonged to the cecidomyiidae (diptera). the highest gall frequency was found on leaves (58.70%) of the host plants, and was glabrous (83.70%). most gall shape were elliptic (30.43%). a low similarity in galling insect species was observed among the three sampled physiognomies - the highest similarity index was observed between "cerrado" and "campo sujo" (sφrensen index = 0.20), indicating that the presence of rare species of galling insects might be common in these environments.
CARACTERIZA??O DA FERTILIDADE DOS SOLOS DE QUATRO LEGUMINOSAS DE CAMPOS RUPESTRES, SERRA DO CIPó, MG, BRASIL
Negreiros,Daniel; Borges Moraes,Mateus Lana; Wilson Fernandes,Geraldo;
Revista de la ciencia del suelo y nutrición vegetal , 2008, DOI: 10.4067/S0718-27912008000300003
Abstract: the goal of the present study was to characterize the nutritional quality of the soils colonized by four endemic leguminous shrubs of serra do cipo, southeastern brazil: calliandra fasciculata benth., chamaecrista ramosa (vog.), collaea cipoensis fortunato and mimosa foliolosa benth. a mixed soil sample collected between 0 and 15cm depth was obtained in four subpopulations of each species. each mixed sample resulted from the combination of 20 simple samples (four samples of five adult individuals) in each subpopulation. routine, organic matter, micronutrients, and granulometric analysis were performed for each sample. the soils colonized by the four species were sandy, acidic, deficient in all macronutrients, and with high aluminum saturation. however, the levels of organic matter, zinc, iron, and bore ranged from medium to high. there was no significant difference in organic matter, phosphorus, iron, bore, sulphur, potential acidity, and granulometric parameters among the soils of the four species. the results of the present study corroborate previous studies in rupestrian field soils of serra do cipo. management plans and land rehabilitation programs should keep the conditions of low soil fertility because the endemic flora adapt well on these soils and may have increased competitive ability under these nutritional ranges.
CARACTERIZA O DA FERTILIDADE DOS SOLOS DE QUATRO LEGUMINOSAS DE CAMPOS RUPESTRES, SERRA DO CIPó, MG, BRASIL Characterization of soil fertility of four leguminous shrubs of rupestrian fields, Serra do Cipo, MG, Brazil
Daniel Negreiros,Mateus Lana Borges Moraes,Geraldo Wilson Fernandes
Revista de la Ciencia del Suelo y Nutrición Vegetal , 2008,
Abstract: O presente trabalho teve como objetivo caracterizar a qualidade nutricional dos solos de popula es naturais de quatro especies de leguminosas de campo rupestre: Calliandra fasciculata Benth., Chamaecrista ramosa (Vog.), Collaea cipoensis Fortunato e Mimosa foliolosa Benth. Urna amostra composta de solo na profundidade de 0 a 15cm foi coletada em quatro subpopula es de cada especie. Cada amostra composta resultou da coleta de 20 amostras simples (quatro amostras em cinco individuos adultos) por subpopula o. Foram feitas análises de rotina (pH, P, K, Ca21, Mg21, Al31, H+Al), materia organica, micronutrientes e granulométrica. Os solos apresentaram acidez elevada, baixa fertilidade, alta satura o de aluminio e textura predominantemente arenosa. Entretanto, n o foram encontrados baixos teores de materia organica, B, Fe e Zn. Os solos diferiram significativamente entre si nos teores de materia organica, P, Fe, B, H+Al e textura. Os resultados obtidos est o de acordó com outros levantamentos realizados em solos de campo rupestre na Serra do Cipo. Planos de manejo e reabilita o de áreas degradadas em campo rupestre devem procurar manter as condi es de baixa fertilidade desses solos, visto que a flora endémica de campo rupestre mostra boa adapta o a estas condi es, podendo apresentar maior vantagem competitiva dentro desse espectro nutricional. The goal of the present study was to characterize the nutritional quality of the soils colonized by four endemic leguminous shrubs of Serra do Cipo, southeastern Brazil: Calliandra fasciculata Benth., Chamaecrista ramosa (Vog.), Collaea cipoensis Fortunato and Mimosa foliolosa Benth. A mixed soil sample collected between 0 and 15cm depth was obtained in four subpopulations of each species. Each mixed sample resulted from the combination of 20 simple samples (four samples of five adult individuals) in each subpopulation. Routine, organic matter, micronutrients, and granulometric analysis were performed for each sample. The soils colonized by the four species were sandy, acidic, deficient in all macronutrients, and with high aluminum saturation. However, the levels of organic matter, zinc, iron, and bore ranged from medium to high. There was no significant difference in organic matter, phosphorus, iron, bore, sulphur, potential acidity, and granulometric parameters among the soils of the four species. The results of the present study corroborate previous studies in rupestrian field soils of Serra do Cipo. Management plans and land rehabilitation programs should keep the conditions of low soil fertility because the
Turismo de lujo e internet: Oportunidades para las Agencias de Viajes
Fernandes Galhanone,Renata; Marques,Jane Aparecida; Toledo,Geraldo Luciano; Mazzon,José Afonso;
Estudios y perspectivas en turismo , 2010,
Abstract: luxury travel and internet. opportunities for travel agents. this paper aims to verify how internet-enabled possibilities are being exploited in the tourism industry, specifically in luxury travel agency websites, which were investigated in terms of their sales and communication features. at the same time, the actual usage of websites by luxury travel customers and prospects is analyzed, as well as their needs and wants in purchasing travel services on- and offline. results indicate that there are still many possibilities to be exploited by travel agents in servicing the luxury traveler, which may foster communications and sales and help making services more tangible for customers and prospects.
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