Significant changes in water pCO2 caused by turbulence from waterfalls |
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| Institution: | 1. Post-Graduate Program in Ecology of Tropical Biomes, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto ? MG, 35400-000, Brazil;2. Post-Graduate Program in Ecology, Federal University of Juiz de Fora, R. José Lourenço Kelmer, Juiz de Fora ? MG, 36036-330, Brazil;3. Laboratory of Aquatic Ecology, Evolution and Conservation, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto ? MG, 35400-000, Brazil;4. Laboratory of Aquatic Ecology, Federal University of Juiz de Fora, Juiz de Fora ? MG, 36036-330, Brazil |
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| Abstract: | Inland waters are sites of intense carbon processing, stocking and transport. We examined the influence of waterfall-turbulence on CO2 partial pressures (pCO2) before and after waterfalls in a tropical river. The results indicated a 51.4% decrease of pCO2 from up (1375 ± 320 ppm) to downriver (655 ± 58 ppm), suggesting an unaccounted degassing promoted by waterfall-turbulence. This process needs to be better understood in order to more accurately determine the role of freshwater environments in the global carbon balance. |
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| Keywords: | Carbon dioxide Outgassing Waterfalls River |
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