Phytoplankton production of two atolls of the Indian Ocean

M.V.M. Wafar

Abstract



Primary productivity studies on two atolls in the Lakshadweep Archipelago indicate that the contribution of larger phytoplankton to the reef production is not significant. Nannoplankton ( 64 mu) on the other hand, account for 65-75% of the total phytoplankton production. Dissolved carbohydrate content near the reef was high and ranged from 20 to 50 mg l-1. This appears to be related to the high benthic productivity. Particulate organic carbon was also high in the reef waters and the high levels of dissolved carbohydrate might be contributing to an increase in the organic carbon. Zooplankton biomass was higher outside the reef than in the lagoon, indicating a decrease in the zooplankton organisms as they pass over the reef

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