Contribution of microplankton and nannoplankton in the waters of a tropical estuary

Qasim, S Z and Vijayaraghavan, Sumitra and Joseph , K J and Balachandran, V K (1974) Contribution of microplankton and nannoplankton in the waters of a tropical estuary. Indian Journal of Marine Sciences, 3 . pp. 146-149.



Four different size groups of algae were sampled from Cochin Backwater by passing sea water through different grades of bolting nylon. C assimilation, chlorophyll (chl.) a concentration and cell numbers of each size group were determined throughout the year along with those of non-fractionated material. The contribution of nannoplankton, largely composed of diatoms, was found to be much greater than that of microplankton throughout the year. Pooled values of fractionated material agreed closely with those of non-fractionated material, but no regular seasonal trend was found in photosynthesis, chl. a and cell numbers of any size group. A greater dominance of nannoplankton as primary producers over microplankton seems relevant to food chain considerations, as filter-feeding larval stages are probably able to utilize nannoplankton more efficiently than microplankton.

Item Type:Article
Uncontrolled Keywords:Contribution; microplankton; nannoplankton; tropical estuary
Subjects:Marine Biology > Zooplanktons
Marine Biology > Phytoplanktons
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:7312
Deposited By:Arun Surendran
Deposited On:05 Feb 2011 11:48
Last Modified:05 Feb 2011 15:32

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