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Acta Adriatica, Vol. 59 No. 1, 2018.

Original scientific paper

https://doi.org/10.32582/aa.59.1.4

Factors affecting the distribution of two Synechococcus ecotypes in the coastal Adriatic Sea

Danijela ŠANTIĆ orcid id orcid.org/0000-0002-2330-4600 ; Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia
Mladen ŠOLIĆ orcid id orcid.org/0000-0002-5486-0802 ; Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia
Ivana MARIN ; Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia
Ana VRDOLJAK orcid id orcid.org/0000-0002-2330-4600 ; Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia
Grozdan KUŠPILIĆ orcid id orcid.org/0000-0002-9773-7628 ; Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia
Živana NINČEVIĆ GLADAN ; Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia

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Abstract

Distribution and abundance of two Synechococcus ecotypes, phycocyanin-rich cells (PC-SYN) and phycoerythrin-rich cells (PE-SYN) were studied in the surface layer of the central Adriatic Sea during the 2015-2016 period. The studied area included several estuarine areas and coastal to open sea trophic gradients, covering a wide range of seawater temperatures \((11.82 - 20.75 ^oC)\), salinity (4.47 - 38.84) and nutrient concentration. The abundance of PC-SYN ranged from \( 0 to 79.79 x 10^ 3 cell mL^-1\) and that of PE-SYN from \(5.01 x 10^3 to 76.74 x 10^3 cell mL^-1\). Both ecotypes coexisted in the studied waters with PC-SYN cells dominating during spring and PE-SYN during winter and autumn. PC-SYN showed a significant positive relationship with temperature and strong positive responses to nitrogen nutrients, whereas PE-SYN positively responded to phosphate availability. The relative ratio of phosphorus availability and total inorganic nitrogen nutrients (N/P ratio) affects the spatial distribution of the two Synechococcus ecotypes.

Keywords

phycocyanin-rich cells; phycoerythrin-rich cells; nitrogen; phosphorus; trophic status

Hrčak ID:

204582

URI

https://hrcak.srce.hr/204582

Publication date:

9.7.2018.

Article data in other languages: croatian

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