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Seasonal variability of carbon dioxide in the rivers and lagoons of Ivory Coast (West Africa)
Kone, Y.J.M.; Abril, G.; Kouadio, K.N.; Delille, B.; Borges, A.V. (2009). Seasonal variability of carbon dioxide in the rivers and lagoons of Ivory Coast (West Africa). Est. Coast. 32(2): 246-260. dx.doi.org/10.1007/s12237-008-9121-0
In: Estuaries and Coasts. Estuarine Research Federation: Port Republic, Md.. ISSN 1559-2723, more
Peer reviewed article  

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Keyword
    Eichhornia crassipes (Mart.) Solms [WoRMS]
Author keywords
    Carbon dioxide; Inorganic nutrients; Tropical lagoons; Tropical rivers;Eichhornia crassipes

Authors  Top 
  • Kone, Y.J.M., more
  • Abril, G.
  • Kouadio, K.N.

Abstract
    We report partial pressure of CO2 (pCO2) and ancillary data in three rivers (Bia, Tanoé, and Comoé) and five lagoons (Tendo, Aby, Ebrié, Potou, and Grand-Lahou) in Ivory Coast (West Africa), during four cruises covering the main climatic seasons. The three rivers were oversaturated in CO2 with respect to atmospheric equilibrium, and the seasonal variability of pCO2 was due to dilution during the flooding period. Surface waters of the Potou, Ebrié, and Grand-Lahou lagoons were oversaturated in CO2 during all seasons. These lagoons behaved similarly to the oligohaline regions of macrotidal estuaries that are CO2 sources to the atmosphere due to net ecosystem heterotrophy and inputs of riverine CO2 rich waters. The Aby and Tendo lagoons were undersaturated in CO2 with respect to the atmosphere because of their permanent haline stratification (unlike the other lagoons) that seemed to lead to higher phytoplankton production and export of organic carbon below the pycnocline.

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