Faculdade de Meteorologia - FAMET/IG
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2798
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Navegando Faculdade de Meteorologia - FAMET/IG por Assunto "Biosfera"
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Item Acesso aberto (Open Access) Interações entre nuvens, chuvas e a biosfera na Amazônia(Instituto Nacional de Pesquisas da Amazônia, 2005-06) DIAS, Maria Assunção Faus da Silva; COHEN, Júlia Clarinda Paiva; GANDU, Adilson WagnerA review of results obtained within the Physical Climate component of LBA with respect to the interaction between the biosphere and cloud and rain formation in the Amazon Basin, in different seasons and different regions within the Basin is presented. The deforestation effect and the effect of biomass burning are discussed and the physical processes highlighted based on the data collected in several LBA intensive field campaigns. The complex interactions and the progress in the understanding their evolution based on the new datasets is presented.Item Acesso aberto (Open Access) Transpiração em espécie de grande porte na Floresta Nacional de Caxiuanã, Pará(2007-04) COSTA, Rafael Ferreira da; SILVA, Vicente de Paulo Rodrigues da; RUIVO, Maria de Lourdes Pinheiro; MEIR, Patrick; COSTA, Antonio Carlos Lôla da; MALHI, Yadvinder Singh; BRAGA, Alan Pantoja; GONÇALVES, Paulo Henrique Lopes; SILVA JUNIOR, João de AthaydesDuring the “Long-term of impact drought on water and carbon dioxide fluxes in Amazonian Tropical Rainforest Experiment” (ESECAFLOR), this study was carried out, which is a subproject of Large Scale Biosphere Atmosphere Experiment in Amazônia (LBA), located in the Ferreira Penna Scientific Station (FPSS) in the Caxiuanã National Forest (CNF) in Pará State (1o 42’ 30’’ S; 51o 31’45’’ W; 62 m altitude). The region has a well-preserved forest, with canopy of 35 m. The predominate tree species in the landscape are Eschweilera coriacea (White Matá-matá), Voucapoua americana (Acapu) and Protium pallidum (White Pitch). Sap flow measurements were made in the wet season (03-16 December 2000 and 12-25 January 2003), to evidence the effect of long term induced drought, aiming to determinate the transpiration of Eschweilera coriacea. The ESECAFLOR site consists of two different areas with 1 ha each. Plot A (control) and Plot B (rainfall exclusion). The Trunk Heat Balance (THB)method was applied to sap flow measurements, by Sap Flow Meter P4.1 system. Between analysed periods, the mean transpiration of E. Coriacea increased 56% in the tree A237 (control plot) and decreased 68% in B381 (drought plot)Item Acesso aberto (Open Access) Variação sazonal da população de bactérias e fungos e dos teores de nitrato e amônio do solo nos sítios do LBA e PPBIO, na amazônia oriental(Universidade Federal do Pará, 2015-09) MOURA, Quêzia Leandro de; RUIVO, Maria de Lourdes Pinheiro; RODRIGUES, Hernani José Brazão; ROCHA, Edson José Paulino da; SILVA JUNIOR, João de Athaydes; VASCONCELOS, Steel Silva; ANDRADE, Mariseth Carvalho de; MANES, Carmem Lara de OliveiraIt is possible that the environmental factors determining the behavior of soil microbiota are being modified by anthropic or natural climate change. In order to check the effect of the exclusion of water over the population of bacteria and fungi in the soil, the present study was developed. The chosen location is the area of the ESECAFLOR experiment, which simulates the occurrence of extreme phenomena such as El Niño event, and the area of biodiversity research program Program-PPBio (primary forest). This later area, supposed to be used for studying the Biodiversity of the Amazon, was used as a control area for comparative purposes. The soil was sampled at 00 - 05, 05 -10, 10-20 and 20-30 cm depths, during the rainy, transition and less rainy seasons. The highest values of Colonies Forming Units (CFU) for bacteria and fungi populations were 196 x 104 CFU/g of soil and 124 x 102 CFU/g of solo, respectively, both in the area without human intervention (PPBio). Soil moisture is the variable influencing most the obtained counting values of fungi and bacteria populations.