Tropical Rain Forests
Mostrando 25-36 de 46 artigos, teses e dissertações.
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25. Revisão de Pleonotoma Miers (Gignonieae, Bignoniaceae)
Pleonotoma Miers (Bignonieae, Bignoniaceae) is a monophyletic genus of neotropical distribution ranging from Guatemala to Brazil and Bolivia, including Trinidad and Tobago, with its center of diversity in northern Brazil. It is distributed in tropical rain forests in Central and South America, transitional forests between rain forests and the hyperseasonal P
Publicado em: 2006
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26. Estudo fenologico de especies arboreas de uma floresta tropical em Linhares, ES
This paper aims at describing the periodicity of reproductive and vegetative phenologica1 events of canopy trees in a tropical lowland seasonal moist forest at Línhares, northeaster ES, and relating them to climatic seasonality. Every mo weeks, five individuals of 41 species, distributed withín 15.000 ha of forest, were observed for the occurrence of flowe
Publicado em: 2006
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27. Nitrogen balance in paired small catchments (forest vs. pasture) in Rondonia state. / Balanço de nitrogênio em microbacias pareadas (floresta vs. pastagem) no estado de Rondônia.
The nitrogen cycle has been altered by anthropogenic activities, in response to the increment of cultures such, as the leguminous, fossil fuel use, and deforestation for agricultural uses and cattle raising. In temperate regions, there is considerable information about the biogeochemical cycle of nitrogen and the role of anthropogenic alterations on this cyc
Publicado em: 2005
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28. A importância das palmeiras arborescentes de grande porte na dinâmica das florestas amazônicas sazonalmente secas.
We investigated and compared the determinants of palm diversity at different spatial scales: along a moisture gradient in a seasonally dry Amazonian forest and using a climatic model comprising the entire Brazilian territory. Climatic hazards seem to strongly determine the distribution of palms, with the relative importance of moisture being highly consisten
Publicado em: 2005
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29. Spatial pattern analysis of trees of four forest communities in southeastern Brazil, using Ripleys K function. / Análise dos padrões espaciais de árvores em quatro formações florestais do estado de São Paulo, através de análisses de segunda ordem, como a função K de Ripley.
Tree spatial patterns are influenced by abiotic and biotic environment. Among the main abiotic factors are topography, light, nutrients, soil and water availability. Among biotic factors are density-dependent processes, as intraespecific and interespecific competition, herbivory, pathogens, phenology and seed dispersion. Investigation of tree spatial pattern
Publicado em: 2004
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30. Monitoring and characterization of areas submitted to logging in amazonia by change-detection techniques / Monitoramento e caracterização de áreas submetidas à exploração florestal na amazônia por técnicas de detecção de mudanças
Selective logging has been affecting extensive areas of primary forests in Amazonia. This activity, when practiced in a predatory way, causes severe environmental impacts such as erosion and soil compaction, increased carbon emissions, increased forest-fire susceptibility and increased risk of local species extinction. Monitoring logging activity is fundamen
Publicado em: 2004
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31. Rates of energy storage and stem heat fluxes in a terra firme forest in central Amazonia. / Taxas de arnazenamento de energia e fluxos de calor nos troncos em floresta de terra firme na Amazônia central
The parts of the Rate of Energy Storage (RES) in a one hectare site of a Terra Firme forest in Central Amazonia was determined for a set of typical days during the dry season. Thus, to obtain the RES in part of the above ground biomass fraction of the forest (stem, branches, and litter), the temperatures of four stems of the dominating tree species were meas
Publicado em: 2004
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32. Taxas de arnazenamento de energia e fluxos de calor nos troncos em floresta de terra firme na Amazônia central / Rates of energy storage and stem heat fluxes in a terra firme forest in central Amazonia.
Os termos da Taxa de Armazenamento de Energia (TAE) em um hectare selecionado em sítio de floresta de terra firme na Amazônia Central foram computados para um conjunto de dias típicos durante a estação seca. Assim, para obter a TAE em parte da biomassa aérea da floresta (troncos, ramos e liteira), as temperaturas de quatro troncos de árvores de espéc
Publicado em: 2004
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33. Relações entre as anomalias de TSM do atlântico e pacífico e as precipitações na amazônia oriental / Relationships between the atlantic and pacific SST anomalies and the eastern amazon rainfall
The seasonal and interannual rainfall variability in the Eastern Amazon region was related to the Tropical, South Atlantic and Equatorial Pacific SSTA. 3 x 3 contingency tables, evaluated by the Relative Operating Characteristics Score were used to check the simultaneous and up to 12 months lagged occurrence of 3 rainfall categories (below, near and above no
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/12/2003
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34. Relações entre as anomalias de TSM do atlântico e pacífico e as precipitações na amazônia oriental / Relationships between the atlantic and pacific SST anomalies and the eastern amazon rainfall
The seasonal and interannual rainfall variability in the Eastern Amazon region was related to the Tropical, South Atlantic and Equatorial Pacific SSTA. 3 x 3 contingency tables, evaluated by the Relative Operating Characteristics Score were used to check the simultaneous and up to 12 months lagged occurrence of 3 rainfall categories (below, near and above no
Publicado em: 2003
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35. Análise quantitativa e qualitativa do crescimento de caixeta - Tabebuia cassinoides (LAM.) DC. - em florestas manejadas, no município de Iguape/SP. / Quantitative and qualitative analysis of the growth caixeta tabebuia cassinoides (lam.) dc. in forest handeled in the municipal district of Iguape/SP.
Caixeta Tabebuia cassinoides (LAM.) DC. is a tree species of swamp forests in the Atlantic Rain Forest. It has been used since the 30s, mainly for clog and pencil production. IBAMA Decree no. 218 prohibited Caixetas explotation in 1989. By its importance for the community and social movement, caixetas management was regulated by the Resolution 11
Publicado em: 2003
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36. Estudo das radiações solar e terrestre acima e dentro de uma floresta tropical úmida / Solar and terrestrial radiation above and inside a tropical rain forest
In a micrometeorological experiment accomplished during the campaign WETAMC/LBA (from 26/01 to 10/03/1999) measurements of solar and terrestrial radiation were made on a tropical forest environment, at Biological Reservation of Jaru- RO (10° 05 S; 61° 56 W). Data of incident and reflected solar global radiation flux were collected using pyranometers, incid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/10/2001