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Micro phyto benthos photosynthetic pigments and primary production in a tropical lagoon ebrie lagoon abidjan ivory coast






Cahiers OO.M.-(Office-de-la-Recherche-Scientifique-et-Technique-Outre-Mer)-Serie-Oceanographie. 1977; 15(1): 3-26

Micro phyto benthos photosynthetic pigments and primary production in a tropical lagoon ebrie lagoon abidjan ivory coast

A study was conducted in April and May 1975 in order to investigate the functional chlorophyll a and phaeopigments contents (acetone extraction, spectrophotometry) as well as primary production (O2 method) in sediments from 0-5 m bottoms of the Ebrie Lagoon. The chlorophyll a contents were always higher than 100 mg/m2 between 0 and 2 m (maximum 353 mg/m2). Phaeopigments reached a maximum valve (256 mg/m2) towards 1.5 m. The seaward area, more disturbed (Vridi canal) and the 2 end-parts of the lagoon affected by currents showed the highest chlorophyll a values as well on the surface as inside the sediment. The average values of primary production of microphytobenthos were 29.0 .+-. 5.9 mgC/m2 per h1 in the zone located between 0 and 2 m, which covered about 40% of the total area of the studied zone (22.3 .+-. 7.0 between 0 and 5 m, i.e. 70% of the total area).

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Accession: 005894809



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