Original scientific paper

https://doi.org/10.32582/aa.58.1.3

Morphology and ecology of the poorly known dinoflagellate Prorocentrum arcuatum (Dinophyceae) from the Medulin Bay (eastern Adriatic Sea)

Sanda SKEJIĆ orcid.org/0000-0002-4038-7495 ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Ana CAR orcid.org/0000-0001-6018-4305 ; Institute for Marine and Coastal Research, Kneza Damjana Jude 12, 20 000 Dubrovnik, Croatia
Ivona MARASOVIĆ ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Slaven JOZIĆ orcid.org/0000-0002-0671-2194 ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Mia BUŽANČIĆ orcid.org/0000-0003-3848-9561 ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Jasna ARAPOV orcid.org/0000-0001-7568-1929 ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Živana NINČEVIĆ GLADAN ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Ana BAKRAČ ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Grozdan KUŠPILIĆ orcid.org/0000-0002-9773-7628 ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Olja VIDJAK ; Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
Jacob LARSEN ; IOC Science and Communication Centre on Harmful Algae, University of Copenhagen, Universitetsparken 4, DK-2100 Copenhagen, Denmark

Abstract

The unusual and prolonged occurrence of rare and poorly known dinoflagellate Prorocentrum arcuatum in the phytoplankton of the shallow aquaculture site in Medulin Bay was recorded from July 2013 to October 2014. This enabled us to investigate changes in abundance and environmental drivers of P. arcuatum population dynamics in natural conditions, and to provide first detailed description of P. arcuatum from field samples based on SEM images. During 15 months of observations we also recorded seasonal variability in P. arcuatum cell size. The optimum physical conditions for P. arcuatum proliferation were reached in autumn 2013, during the narrow temperature range between 19.6 oC – 20.4 oC, and salinity between 36.7 - 37.7. Despite the general similarity in physical conditions in autumn 2014, this increase in the abundance of P. arcuatum was not repeated, which might be connected to higher competition due to observed interannual changes in phytoplankton population structure.

Keywords

Adriatic Sea; planktonic dinoflagellates; Prorocentrum; Prorocentrum arcuatum

Hrčak ID:

185168

URI

https://hrcak.srce.hr/185168

Publication date:

26.6.2017.

Article data in other languages: croatian

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