Effects of ammonium effluents on planktonic primary production and decomposition in a coastal brackish water environment. II. Interrelations between abiotic and biotic components of the planktonic ecosystem
Tamminen, T. (1982). Effects of ammonium effluents on planktonic primary production and decomposition in a coastal brackish water environment. II. Interrelations between abiotic and biotic components of the planktonic ecosystem. Neth. J. Sea Res. 15(3-4): 349-361
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, more
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| Keywords |
Marine/Coastal; Brackish water |
| Abstract |
Interaction between abiotic and biotic components of the planktonic ecosystem in an ammonium-loaded archipelago area were studied at the entrance of the Gulf of Finland, Baltic Sea. Gradients of chlorophyll a, primary productivity and heterotrophic activity evolved around the discharge site. Multivariate analyses described typical stages in the succession of the planktonic community. A pronounced heterotrophic phase was observed, which referred especially to the innermost research area. Since acute stimulations of heterotrophic activity were observed only exceptionally in effluent tests, planktonic and benthic primary production and sediment metabolism were considered as mediators of effluent effects on heterotrophy. |
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