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The role of the diatom Cylindrotheca closterium in a mucilage event in the northern Adriatic Sea: coupling with high salinity water intrusions

Najdek-Dragić, Mirjana; Blažina, Marija; Đakovac, Tamara; Kraus, Romina (2005) The role of the diatom Cylindrotheca closterium in a mucilage event in the northern Adriatic Sea: coupling with high salinity water intrusions. Journal of Plankton Research, 27 (9). pp. 851-862. ISSN 0142-7873

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Abstract

The temporal and spatial distribution of mucilaginous aggregates, during the mucilage event of 2002 in the northern Adriatic, was studied in relation to waters of different salinity considering the aggregate's age and proportion of Cylindrotheca closterium in its microphytoplankton community. The results showed that this epipelic diatom is a dominating species in the microphytoplankton community of freshly formed aggregates in spite of its negligible abundance in the water column. The appearance and distribution of these aggregates in the water column was associated with water of higher salinity. The same pattern was observed in the summer of 2001, when a shorter and limited mucilage event occurred. These results suggest the importance of oligotrophic high salinity water intrusions from the central Adriatic for a selective accumulation of C. closterium cells. Coupling between the increased number and minimum growth state of C. closterium accumulated cells might result in a hyperproduction of its own mucilage in these accumulation zones formed under the influence of high salinity water intrusions. In contrast, in the upper lower salinity water layers, under the influence of a freshwater input, the phytoplankton community of the freshly formed aggregates was similar to that of the surrounding water.

Item Type: Article
Uncontrolled Keywords: mucilaginous aggregates; Cylindrotheca closterium; fatty acid composition; northern Adriatic
Subjects: NATURAL SCIENCES > Geology
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions: Center for Marine Research
Projects:
Project titleProject leaderProject codeProject type
Mehanizam dugoročnih promjena u ekosustavu Jadranskog moraDanilo Degobbis0098111UNSPECIFIED
Depositing User: dr. sc. Romina Kraus
Date Deposited: 01 Jul 2019 15:30
Last Modified: 01 Jul 2019 15:30
URI: http://fulir.irb.hr/id/eprint/4599
DOI: 10.1093/plankt/fbi057

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