2011-07-112011-07-112007-04COSTA, Rafael F. da et al. Transpiração em espécie de grande porte na Floresta Nacional de Caxiuanã, Pará. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 11, n. 2, p. 180-189, abr. 2007. Disponível em: <http://www.scielo.br/pdf/rbeaa/v11n2/v11n2a08.pdf>. Acesso em: 11 jul. 2011. <http://dx.doi.org/10.1590/S1415-43662007000200008>.1807-1929http://www.repositorio.ufpa.br:8080/jspui/handle/2011/2280During 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)porAcesso AbertoMelgaço - PAEstação Científica Ferreira Penna - PAAtmosferaEschweilera coriaceaBiosferaFluxo de seivaFloresta Nacional de Caxiuanã - PAPará - EstadoAmazônia brasileiraArtigo de Periódico