Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/17551
Título: Water balance, nutrient and carbon export from a heath forest catchment in central Amazonia, Brazil
Autor: Zanchi, Fabrício Berton
Waterloo, M. J.
Peralta-Tapia, Andrés
Alvarado-Barrientos, M. Susana
Bolson, Marcos A.
Luizão, Flávio Jesus
Manzi, Antônio Ocimar
Dolman, A. Johannes
Palavras-chave: Budget Control
Catchments
Ecology
Ecosystems
Evapotranspiration
Forestry
Groundwater
Landforms
Nutrients
Rain
Runoff
Dissolved Organic Carbon
Doc Export
Heath Forest
Rainfall Interception
Regional Groundwater
Retention Capacity
River Runoffs
Water Balance
Organic Carbon
Carbon Budget
Catchment
Dissolved Organic Carbon
Evapotranspiration
Groundwater Flow
Nutrient
Rainfall
Runoff
Water Budget
Ecosystems
Forests
Groundwater
Rivers
Runoff
Amazon Basin
Amazonia
Data do documento: 2015
Revista: Hydrological Processes
É parte de: Volume 29, Número 17, Pags. 3633-3648
Abstract: Carbon storage values in the Amazon basin have been studied through different approaches in the last decades in order to clarify whether the rainforest ecosystem is likely to act as a sink or source for carbon in the near future. This water balance, dissolved organic carbon (DOC) and nutrient export study were carried out in a micro-scale heath forest (Campina) catchment in central Amazonia, Brazil. For a 1-year study period (18 March 2007 until 19 March 2008), rainfall amounted to 3054mm; of which, 1532mm was evaporated by the forest (4.1mmday-1). Rainfall interception loss amounted to 15.6% of gross rainfall. Surface runoff amounted to 485mm, whereas another 1071mm was discharged as regional groundwater outflow. Accumulated DOC exports in surface runoff amounted to 15.3gm-2year-1, whereas the total carbon exported was 55.9gm-2. This is much higher than that observed for a nearby tall rainforest catchment in central Amazonia (DOC export<20gm-2). As Campina heath forest areas cover a significant proportion of the Amazon Basin, these differences in ecosystem hydrological carbon exports should be taken into account in future studies assessing the carbon budget for the Amazon Basin. Macro-nutrient exports were low, but those of calcium and potassium were higher than those observed for tall rainforest in the Amazon, which may be caused by a lower retention capacity of the heath forest ecosystem. © 2015 John Wiley & Sons, Ltd.
DOI: 10.1002/hyp.10458
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