[Parameters: Topic='TERRESTRIAL HYDROSPHERE', Term='WATER QUALITY/WATER CHEMISTRY']
LBA-ECO ND-11 ORGANIC CARBON WATERSHED EXPORTS, MATO GROSSO, BRAZIL: 2003-2004Entry ID: ND11_CPOM
Abstract: Resolving the carbon (C) balance in the Amazonian forest depends on an improved quantification of production and losses of particulate C from forested landscapes via stream export. The main goal of this work was to quantify litterfall, the lateral movement of litter, and the export of coarse organic particulate matter (>2 mm) in four small watersheds (1-2 ha) under native forest in southern ... Amazonia near Juruena, Mato Grosso, Brazil (10Â°25 S, 58Â°46 W). Mean litterfall production was 11.8 Mg ha-1 y-1 (5.7 Mg C ha-1 y-1). Litterfall showed strong seasonality, with the highest deposition in the driest months of the year. About two times more C per month was deposited on the forest floor during the 6-mo dry season (0.65 Mg C ha-1 mo-1) compared to the rainy season (0.3 Mg C ha-1 mo-1). The measured C concentration of the litterfall samples was greater in the dry season than in the rainy season (49% vs. 46%, P < 0.05). The lateral movement of litter increased from the plateau (upper landscape position) towards the riparian zone. However, the trend in C concentration of laterally transported litter samples was the opposite, being highest on the plateau (44%) and lowest in the riparian zone (42%) (P < 0.05). Stream-water exports of particulate C were positively correlated with streamflow, increasing in the rainiest months. The export of particulate C in streamflow was found to be very small (less than 1%) in relation to the amount of litterfall produced.
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Data Set Citation
Dataset Originator/Creator: COUTO, E.G.JOHNSON, M.S.LEHMANN, J.SELVA, E.C.
Dataset Title: LBA-ECO ND-11 ORGANIC CARBON WATERSHED EXPORTS, MATO GROSSO, BRAZIL: 2003-2004
Dataset Release Date: 2009
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/913Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=913&term2attribut...
Start Date: 2003-09-15Stop Date: 2004-09-13
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Creation and Review Dates
DIF Creation Date: 2009-03-31
Last DIF Revision Date: 2012-08-14