Nano- and microplankton in Iraklion Bay, Crete: comparison of coastal waters and mesocosm enclosures assemblages

TitleNano- and microplankton in Iraklion Bay, Crete: comparison of coastal waters and mesocosm enclosures assemblages
Publication TypeJournal Article
Year of Publication1995
AuthorsPitta, P, Divanach P, Kentouri M
JournalBiology and ecology of shallow coastal waters. Proc. 28th European marine biology symposium, Iraklio, Crete, 1993
Pages79 - 86
Abstract

The impacts of different nutrient levels were studied using a combination of a) in situ sampling at 1 m depth from a coastal area, and b) the monitoring of three mesocosms (60 m3). In the first mesocosm sea water only was enclosed, while in the other two, varying quantities of nutrients were added, forming an artificial eutrophication gradient. The increase in nutrient concentration results in an acceleration of the successional stages in comparison with the natural environment. Enclosure conditions lead to increased phytoplankton blooms and dominance of the assemblages by a few species. Significant quantitative and qualitative differences were observed in both the chlorophyll concentrations and the structure and evolution of assemblages between those from the wild and those from the enclosures, irrespective of whether or not they had been fertilized with nutrients.

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