Microzooplankton in the coastal region of the south Adriatic sea and in the Boka Kotorska Bay

Lučić, Petra (2014) Microzooplankton in the coastal region of the south Adriatic sea and in the Boka Kotorska Bay. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The horizontal and vertical distributions of microzooplankton were studied during spring 2013 at three stations in Boka Kotorska Bay (Montenegro) and a single station off Molunat Bay located in neritic zone (Croatia). Variations in nano- and microphytoplankton densities were low, as well as for all microzooplankton groups. Non-loricate ciliates were the most numerous microzooplankton, with the highest values at the surface, which is strongly influenced by a layer of fresh water, where in the organic particles were concentrated. Tintinnid values were low and similar to those recorded in the open Adriatic Sea. Tintinnid species diversity was considerably high, with the highest diversity at the station in the Tivat arm of the Boka Kotorska bay system due to specific environmental conditions caused by the strong influence of fresh water in the surface layer and the influence of the open sea water in the bottom layer. In total, 46 tintinnids were identified, among which 20 were estuarine-neritic and 26 were characteristic of the open sea. Compared to few previous researches, twenty-three species were recorded for the first time in Boka Kotorska Bay. Stenosemella nivalis was the dominant tintinnid at all stations. Copepod nauplii were the most numerous metazoans, but their densities were lower than those known from the majority of coastal Adriatic areas. Small differences in the abundance ratio of nauplii to copepodites (1,7:1) during this study suggest deviations from normal secondary production relationships (5:1). These results can be linked with the observed climate changes identified in the Adriatic Sea from the 1990s, where already in the winter period occurred increase of primary production with the lack of a spring peak.

Item Type: Thesis (Diploma thesis)
Keywords: microzooplankton, non-loricate ciliates, tintinnids, nauplii, copepodites, Southern Adriatic
Supervisor: Njire, Jakica
Co-supervisor: Kružić, Petar
Date: 2014
Number of Pages: 64
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 12 Nov 2014 10:46
Last Modified: 12 Nov 2014 10:46
URI: http://digre.pmf.unizg.hr/id/eprint/3234

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