Forest Covering
Mostrando 25-36 de 47 artigos, teses e dissertações.
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25. Anatomia foliar de espécies de Flacourtiaceae (Sleumer 1980) / Foliar anatomy from species of Flacourtiaceae (Sleumer 1980)
There is no agreement regarding the taxonomic organization of the Flacourtiaceae and the theme is not emphasized in the literature, since there is a lack of taxonomic studies on this family. Several authors point out the close relationship between the families Flacourtiaceae and Salicaceae. Numerous families of plants have members with medicinal uses, standi
Publicado em: 2007
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26. Comunidades de morcegos na caatinga e brejo de altitude, no Agreste de Pernambuco
The fauna of Brazilian bats is composed of 166 species and 76 occur in the caatinga. In spite of the high diversity of bats in the caatinga, there are still scarce the studies with this group in this biome. Extensive gaps of knowledge related to its distribution in the caatinga with some areas without any information referring the bats. Caatinga is a typical
Publicado em: 2007
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27. Cerrado assemblages of reptiles and amphibians along the drainage of Rio Tocantins and the impact of hydroelectric power plants on their conservation / Assembléias de répteis e anfíbios do Cerrado ao longo da bacia do rio Tocantins e o impacto do aproveitamento hidrelétrico da região na sua conservação
The Cerrado herpetofauna was studied along the basin of the Tocantins river using three distinct and complementary approaches. First, a fast sampling scheme, covering all the studied area, was conducted in 11 sites between the Central Plateau, in the state of Goiás, and the northern portion of the Tocantins depression, at the border of the states of Tocanti
Publicado em: 2007
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28. Fluxos de mercurio gasoso na interface solo/atmosfera na Bacia do Rio Negro utilizando camaras dinamicas de fluxo / Hg fluxes en the soil/air interface in the Negro River Basin (Amazon) by using dynamic flux chamber
The aim of this thesis was to quantify the soil/air exchange of mercury in the Negro River Basin by using a Dynamic Flux Chamber. The methodological study showed that the flux chamber was efficient to compare the Hg fluxes in the different sites. However, the humidity inside the chamber and the low flushing flow rate could have subestimated the Hg fluxes. Hg
Publicado em: 2006
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29. Estrutura e dinâmica de uma população de Caesalpinia echinata Lam. (pau-brasil) no litoral norte da Paraíba : uma perspectiva para conservação da espécie
The Pau-Brasil (Caesalpinia echinata Lam.) is a native species of Mata Atlântica, explored extensively since the discovery of Brazil. Nowadays almost disappeared, as a result of the coast forest devastation, being part of the official list of brazilian flora species threatened with extinction. This work had the objective of studying the dynamic and the stru
Publicado em: 2006
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30. Efeito da fragmentação florestal sobre as comunidades de morcegos do Município de Blumenau, SC
The primary forests of the region of the Vale do Itajaí had been object of intense exploration for some decades, leaving as resulted the reduction of the forest covering and the fragmentation of the same one in remainders that today are presented in different sucessions stadiums. The fragmentation of habitat brings consequences on biodiversity, becoming the
Publicado em: 2006
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31. Dung beetles diversity (Coleoptera: Scarabaeidae s.str.) between differents phytophysiognomies in Perdizes Plateau, Carrancas- SE Brazil. / Diversidade de Scarabaeidae s. str. detritÃvoros (Coleoptera) em diferentes fitofisionomias da Chapada das Perdizes, Carrancas - MG
The spatial changes in species composition are closely related to the environmental aspects associated to habitat variation. The natural landscapes of Minas Gerais are organized in mosaics, associated to antropic action or natural factors, such as soil conditions and altitude. This work aims to study the spatial variation in composition and species richness
Publicado em: 2006
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32. Estoque e fraÃÃes da matÃria orgÃnica e suas relaÃÃes com o histÃrico de uso e manejo de latossolos. / Organic matter storage and fractions and the historic of Latosol use and management
In cultivated areas, the reductions in the storage of soil organic matter (SOM) in average are 50%, in a period of cutting of the native vegetation and subsequent cultivation inferior to 10 years. The soil use and management practices exercise great influence on the MOS storage and fractions, since the vegetable covering and the soil management they modify t
Publicado em: 2006
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33. ANÁLISE MULTITEMPORAL DA COBERTURA FLORESTAL DA MICROBACIA DO ARROIO GRANDE, SANTA MARIA, RS / MULTI-TEMPORAL ANALYSIS OF FOREST COVERING FROM ARROIO GRANDE WATERSHED, SANTA MARIA, RS.
This study had as objective to do a multi-temporal analysis from Arroio Grande watershed area, located in Santa Maria, RS, to detect the forest covering changes, its localization and quantification, as well as, to monitor the deforestation and regeneration processes and its main determinant factors. Four satellite images were used: LANDSAT 5 (1987), LANDSAT
Publicado em: 2005
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34. IDENTIFICAÇÃO DE RECURSOS FLORESTAIS EM TRÊS COMUNIDADES DE AGRICULTORES FAMILIARES NA ESTRADA DA VÁRZEA, NO MUNICÍPIO DE SILVES-AM
This study was carried out in three communities at Road of Varzea at Silves municipality, Amazonas State, Brazil. The purpose was to establish features for use and management of wood and non-wood resources for the families of farmers that live at these communities. To establish these social, economic and environmental characteristics were made interviews wit
Publicado em: 2005
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35. Desenvolvimento metodológico para a integração de dados de sensoriamento remoto multi resoluções para a representação da cobertura da terra em campos contínuos de vegetação e classificação por árvores de decisão / Methodology development for the multi resolution remote sensing data integration to the representation of earth covering in vegetation continuous filds and classification for decision tree
Now, countless efforts to quantify the monitoring of the changes of the covering of the earth are had based on analyses of data of the satellite Landsat, consuming for this, an expressive number of hours in laboratories for the processing of these data. Besides, estimates of different analyses (data of smaller resolution - AVHRR) have been generating conflic
Publicado em: 2005
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36. Recobrimento de sementes de Pinus elliottii Engelm como alternativa para semeadura direta em campo / Covering of seeds of Pinus elliottii Engelm as alternative to direct sowing in field
O Pinus eliiottii tem demonstrado potencial para semeadura direta, porém, alguns inimigos naturais, como os pássaros granívoros, são limitantes à técnica. Diante deste fato, o tratamento de sementes pode ser um aliado para garantir o sucesso no estabelecimento dos povoamentos. Visando avaliar a repelência aos pássaros das sementes de P. elliottii rec
Publicado em: 2005