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Phytoplankton seasonality in a highly stratified karstic estuary (Krka, Adriatic Sea)
Cetinić, I.; Viličić, D.; Burić, Z.; Olujić, G. (2006). Phytoplankton seasonality in a highly stratified karstic estuary (Krka, Adriatic Sea), in: Queiroga, H. et al. (Ed.) Marine biodiversity: patterns and processes, assessment, threats, management and conservation: Proceedings of the 38th European Marine Biology Symposium, held in Aveiro, Portugal, 8-12 September 2003. Developments in Hydrobiology, 183: pp. 31-40. dx.doi.org/10.1007/1-4020-4697-9_3
In: Queiroga, H. et al. (2006). Marine biodiversity: patterns and processes, assessment, threats, management and conservation: Proceedings of the 38th European Marine Biology Symposium, held in Aveiro, Portugal, 8-12 September 2003. Developments in Hydrobiology, 183. Springer: Dordrecht. ISBN 1-4020-4321-X. XV, 353 pp. https://dx.doi.org/10.1007/1-4020-4697-9, meer
In: Dumont, H.J. (Ed.) Developments in Hydrobiology. Kluwer Academic/Springer: The Hague; London; Boston; Dordrecht. ISSN 0167-8418, meer

Beschikbaar in  Auteurs 
Documenttype: Congresbijdrage

Trefwoorden
    Aquatic communities > Plankton > Phytoplankton
    Periodicity > Seasonality
    Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
    MED, Croatia, Krka Estuary [Marine Regions]
    Marien/Kust
Author keywords
    phytoplankton; estuary; Krka; Adriatic Sea; seasonality

Auteurs  Top 
  • Cetinić, I.
  • Viličić, D.
  • Burić, Z.
  • Olujić, G.

Abstract
    The abundance of phytoplankton and the composition of nutrients were analysed at three stations in the highly stratified karstic Krka Estuary (east Adriatic coast), in the period March 2000—February 2001. The phytoplankton assemblages were analysed by cluster analysis (average linkage), applied to the Bray—Curtis dissimilarity index computed on density data. Seven groups were identified, which can be combined into two major groups. The spring period was influenced by high riverine water inflow and characterised by the development of cocolithophorids and autotrophic nanoplankton, and small diatoms in winter. In the summer—autumn period domination of one large group occurred, comprising dinoflagellates (micro and nano) and colonial diatoms. Three small groups were also present in that period, each with a specific phytoplankton composition. Variance explained by the Canonical Correspondence Analysis (CCA) of the time-position data was low but corresponded with clustering of samples. CC analysis revealed temperature and salinity as the most important indicators of riverine water impact that influenced species composition and phytoplankton seasonality. The nutrient regime was highly influenced by river/seawater exchange, except in the case of orthophosphates, which showed no correlation with salinity.

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