Forests Amazon
Mostrando 37-48 de 122 artigos, teses e dissertações.
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37. Intra annual seed production and availability of two morphotypes of Brosimum rubescens taubert in forests of the Colombian Amazon
We assessed the reproductive phenology, production, and availability of seeds for two morphotypes of Brosimum rubescens Taub. (Moraceae), locally known as black palosangre (BP) and white palosangre (WP) during an annual cycle in a 20-ha mega plot located in a primary forest at the El Zafire Biological Station, in the Colombian Amazon. We found that 87% and 4
Biota Neotrop.. Publicado em: 2014
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38. Floristic overview of the epiphytic bryophytes of terra firme forests across the Amazon basin
Epiphytic bryophyte communities in terra firme forests of the Amazon region were investigated for the first time through standardized sampling across the Amazon basin. The sampling was carried out at nine localities, where bryophytes were collected in five height zones, from the forest floor to the canopy of eight canopy trees per locality. The sampling gene
Acta Bot. Bras.. Publicado em: 2013-06
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39. Estoque de combustível fino e decomposição de folhas em florestas de igapó do rio Negro / Fine fuel load and leaf decomposition in Rio Negro floodplain forests
In years of low rainfall, fires have occurred in Amazonian black-water floodplain forests, including the Middle Rio Negro. The fires are documented from satellite images. Forest fires require ignition sources, fuel and dry weather. To understand the susceptibility of these forests to fire we investigated the stock of fine fuel on the ground at 29 sites in bl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/10/2012
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40. Avaliação econômica de uma operação de impacto reduzido em uma propriedade privada no estado amazônico de Rondônia / Economic evaluation of a reduced impact logging operation in a private property in the Amazonia State of Rondônia
Forests have economic, ecological and social irreplaceable functions, and much is speculated and investigated about the possibility of these resources simultaneously generate income and be preserved by means of reduced impact logging. In Brazil, a new regulatory framework was established in 2006 to regulate the management of public forests and the processes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/03/2012
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41. Dinâmica biogeoquímica do carbono em ambientes fluviais de águas lênticas da Amazônia Oriental (FLONA de Caxiuanã, Pará) / Biogeochemical dynamic of carbon in slow flowing rivers of Eastern Amazonia (FLONA de Caxiuanã, Pará)
A dinâmica do carbono, nas fases orgânica, inorgânica e gasosa, foi analisada em um ponto na Baía de Caxiuanã e em três pontos no seu afluente Rio Curuá (porções superior, intermediária e inferior) um sistema fluvial de escoamento lento na Amazônia Oriental (Brasil estado do Pará) durante 31 campanhas, de janeiro de 2007 até dezembro de 2009. O
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/02/2012
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42. Species composition and reproductive modes of anurans from a transitional Amazonian forest, Brazil
The aim of the present study was to describe the species composition and reproductive modes of an anuran community from a transition area between the Amazonia and Cerrado biomes. Data were collected in habitats exhibiting different degrees of anthropogenic degradation. The community (35 species) identified during the present study presented a larger number o
Zoologia (Curitiba). Publicado em: 2012-02
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43. Height-diameter relationships of tropical Atlantic moist forest trees in southeastern Brazil
Site-specific height-diameter models may be used to improve biomass estimates for forest inventories where only diameter at breast height (DBH) measurements are available. In this study, we fit height-diameter models for vegetation types of a tropical Atlantic forest using field measurements of height across plots along an altitudinal gradient. To fit height
Scientia Agricola. Publicado em: 2012-02
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44. Metodologia para projetos florestais de créditos de carbono envolvendo a conversão da exploração madeireira convencional para o manejo florestal com exploração de impacto reduzido / Methodology for calculating carbon credits for forest projects involving the conversion from conventional to reduced-impact logging
As crescentes preocupações com a mitigação das mudanças do clima levaram à criação de mecanismos de mercado que recompensassem financeiramente ações adicionais de remoção de gases do efeito estufa da atmosfera através de projetos voltados ao mercado de carbono. Embora, no âmbito do Protocolo de Kyoto, apenas atividades florestais de florestamen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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45. Variação geográfica de Hylaeamys yunganus (Thomas, 1902) na América do Sul (Rodentia: Sigmodontinae) / Geographic variation and phylogeography of Hylaeamys yunganus (Thomas, 1902) (Rodentia: Sigmodontinae)
Hylaeamys yunganus is a rodent of the Oryzomyini tribe presenting samples distributed through the Amazon rainforests and occupies a wide altitudinal gradient, which extends from sea level up to ca. 2,000m. Information available in the literature suggests that populations of H. yunganus from Venezuela, Colombia, Ecuador, Peru and western Brazil have large bod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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46. Distribution of soil organic carbon fractions in old-growth forests in the Amazon Basin: the role of soil properties, leaf litter quality and climate / Distribuição das frações do carbono orgânico nos solos de florestas maduras na Bacia Amazônica: o papel das propriedades do solo, da qualidade da liteira e do clima
Soil organic carbon (SOC) stability is a function of environmental and biological conditions such as edaphic factors, climate and organic matter quality. Considering that a wide variation occurs in all these parameters across Amazonia, one could expect that there should be systematic variations in SOC fractions across the area. Understand the processes invol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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47. Análise integrada do uso e aptidão agrícola dos solos na Amazônia Legal visando o desenvolvimento sustentável
Encroachment of the agricultural frontier over the Brazilian Amazon (Amazônia Legal) forest and savanna (cerrado) areas generates an array of negative environmental impacts, such as deforestation and fires. The conflict between the pressing agricultural front, mainly represented by cattle and soya productions, and the preservation of such forest and cerrado
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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48. Diversidade, diferenciação e biogeografia de pequenos mamíferos não-voadores na Mata Atlântica ao norte do rio São Francisco Centro de Endemismo Pernambuco / Diversity, differentiation and biogeography of non-volant small mammals of the Atlantic Forest north of São Francisco river - Pernambuco Endemism Center
The Brazilian tropical rainforests (Amazon and Atlantic Forest) present high species diversity and are currently separated by a belt of open and dry vegetation. Part of this belt is occupied by the Caatinga, where are found the Brejos de Altitude, evidence of the historical connections between the Atlantic Forest and the Amazon. The Pernambuco Endemism Cente
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011