Journal
ESTUARIES AND COASTS
Volume 32, Issue 2, Pages 246-260Publisher
SPRINGER
DOI: 10.1007/s12237-008-9121-0
Keywords
Carbon dioxide; Inorganic nutrients; Tropical lagoons; Tropical rivers; Eichhornia crassipes
Funding
- Ivory Coast government
- Agence Universitaire de la Francophonie [6313PS657]
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We report partial pressure of CO2 (pCO(2)) and ancillary data in three rivers (Bia, Tano,, and Como,) and five lagoons (Tendo, Aby, Ebri,, 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 pCO(2) was due to dilution during the flooding period. Surface waters of the Potou, Ebri,, 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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