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Article

Phytoplankton Pigments Reveal Size Structure and Interannual Variability of the Coastal Phytoplankton Community (Adriatic Sea)

National Institute of Biology, Marine Biology Station Piran, Fornače 41, SI-6330 Piran, Slovenia
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Author to whom correspondence should be addressed.
The first two authors contributed equally.
Academic Editor: Anas Ghadouani
Water 2022, 14(1), 23; https://doi.org/10.3390/w14010023
Received: 21 September 2021 / Revised: 14 December 2021 / Accepted: 20 December 2021 / Published: 22 December 2021
(This article belongs to the Special Issue Phytoplankton Ecology and Physiology of Coastal Seas)
In coastal seas, a variety of environmental variables characterise the average annual pattern of the physico-chemical environment and influence the temporal and spatial variations of phytoplankton communities. The aim of this study was to track the annual and interannual variability of phytoplankton biomass in different size classes in the Gulf of Trieste (Adriatic Sea) using phytoplankton pigments. The seasonal pattern of phytoplankton size classes showed a co-dominance of the nano and micro fractions during the spring peak and a predominance of the latter during the autumn peak. The highest picoplankton values occurred during the periods with the lowest total phytoplankton biomass, with chlorophytes dominating during the colder months and cyanobacteria during the summer. The highest number of significant correlations was found between phytoplankton taxa and size classes and temperature, nitrate and nitrite. The most obvious trend observed over the time series was an increase in picoplankton in all water layers, with the most significant trend in the bottom layer. Nano- and microplankton showed greater variation in biomass, with a decrease in nanoplankton biomass in 2011 and 2012 and negative trend in microplankton biomass in the bottom layer. These results suggest that changes in trophic relationships in the pelagic food web may also have implications for biogeochemical processes in the coastal sea. View Full-Text
Keywords: phytoplankton; biomass; phytoplankton size classes; phytoplankton pigments; HPLC; interannual variability; trends; Adriatic Sea phytoplankton; biomass; phytoplankton size classes; phytoplankton pigments; HPLC; interannual variability; trends; Adriatic Sea
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MDPI and ACS Style

Flander-Putrle, V.; Francé, J.; Mozetič, P. Phytoplankton Pigments Reveal Size Structure and Interannual Variability of the Coastal Phytoplankton Community (Adriatic Sea). Water 2022, 14, 23. https://doi.org/10.3390/w14010023

AMA Style

Flander-Putrle V, Francé J, Mozetič P. Phytoplankton Pigments Reveal Size Structure and Interannual Variability of the Coastal Phytoplankton Community (Adriatic Sea). Water. 2022; 14(1):23. https://doi.org/10.3390/w14010023

Chicago/Turabian Style

Flander-Putrle, Vesna, Janja Francé, and Patricija Mozetič. 2022. "Phytoplankton Pigments Reveal Size Structure and Interannual Variability of the Coastal Phytoplankton Community (Adriatic Sea)" Water 14, no. 1: 23. https://doi.org/10.3390/w14010023

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