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Kopuz, Ulgen; Feyzioglu, Ali Muzaffer; Valente, André

doi:10.4194/1303-2712-v14_1_28

Cited by 17 publications

(7 citation statements)

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“…It is established that meteorological conditions and topography are crucial factors for red tide formation [75]. In Thessaloniki Bay, N. scintillans appeared to prefer higher salinity (>36) relative to those found in other studies [16,67,70]. Based on our results and N. scintillans abundance dynamics during spring-early summer in the Black Sea and the Northern Adriatic Sea, it is suggested that weather forecasts, and in particular wind speed projections, can be used for medium-term prediction of red tides [83].…”

Section: Red Tidesmentioning

confidence: 82%

“…Noctiluca scintillans is one of the most important red tide forming dinoflagellate worldwide in the water temperature range of 10-25 • C, and salinity range of 28 to 36 in eutrophic areas dominated by diatoms [15,67], similar to our study area. Noctiluca red tides have been linked to eutrophication in several areas of the world and especially in the Black Sea, the Sea of Marmara [68][69][70], the Aegean Sea [71], and Adriatic Sea [72]. In contrast, S. pseudonoctiluca has been reported rarely, although new records from many areas suggest a cosmopolitan distribution.…”

Section: Red Tidesmentioning

confidence: 99%

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Phytoplankton Blooms, Red Tides and Mucilaginous Aggregates in the Urban Thessaloniki Bay, Eastern Mediterranean

et al. 2019

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We investigated the plankton community composition and abundance in the urban marine environment of Thessaloniki Bay. We collected water samples weekly from March 2017 to February 2018 at the coastal front of Thessaloniki city center and monthly samples from three other inshore sites along the urban front of the bay. During the study period, conspicuous and successive phytoplankton blooms, dominated by known mucilage-producing diatoms alternated with red tide events formed by the dinoflagellates Noctiluca scintillans and Spatulodinium pseudonoctiluca, and an extensive mucilage aggregate phenomenon, which appeared in late June 2017. At least 11 known harmful algae were identified throughout the study, with the increase in the abundance of the known harmful dinoflagellate Dinophysis cf. acuminata occurring in October and November 2017. Finally, a red tide caused by the photosynthetic ciliate Mesodinium rubrum on December 2017 was conspicuous throughout the sampling sites. The above-mentioned harmful blooms and red tides were linked to high nutrient concentrations and eutrophication. This paper provides an overview of eutrophication impacts on the response of the unicellular eukaryotic plankton organisms and their impact on water quality and ecosystem services.A large volume of domestic and industrial wastes from the city of Thessaloniki has been directed for decades to the Thermaikos Gulf and especially its inner part, Thessaloniki Bay. In the 20 th century, these wastes were discharged in the Bay without treatment, causing the eutrophication of the system. Since 2001, wastewater treatment has been implemented, decreasing the effects of anthropogenic eutrophication [17]. Although it is generally accepted in the public that the water quality in the Thermaikos Gulf has been improved compared to 20-30 years ago [18,19], the urban front of the Thessaloniki Bay, with restricted water circulation and shallowness, still exhibits apparent red tides and algal blooms. These events are usually the cause of irritation to the public, often mentioned in the Greek media, with subsequent socio-economic consequences to the city of Thessaloniki, especially the touristic center. Despite the growing concerns of the citizens and authorities on the water quality of the Bay and particularly of the urban front, only scarce and isolated studies have been published on the abundance and dynamics of plankton community (both phyto-and protozooplankton) in the urban part of the Gulf [20,21]. On the other hand, several studies in the broader Thermaikos Gulf have focused on phytoplankton [18,22,23] and the occurrence of HABs [24,25]. However, comprehensive studies on red tides and mucilage aggregate phenomena are lacking for the Thermaikos Gulf.According to the related legislation for the ecological water quality based on nutrient pressures and the phytoplankton quality element (Water Framework Directive; WFD, 2000/60/EC) there is a need for systematic and frequent monitoring of coastal waters. Furthermore, similar to the WFD objectives are those...

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Section: Red Tidesmentioning

confidence: 82%

Section: Red Tidesmentioning

confidence: 99%

Phytoplankton Blooms, Red Tides and Mucilaginous Aggregates in the Urban Thessaloniki Bay, Eastern Mediterranean

et al. 2019

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“…Therefore the abundance of N. scintillans can change in the same season. An unusual blooming of N. scintillans was observed in April, 2011 in the same place by Kopuz et al (2014). In marine ecosystems, lipids provide the densest form of energy wh ich is transferred fro m algae to vertebrates via zooplankton.…”

Section: Resultsmentioning

confidence: 92%

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Ozdemir¹,

Caf²,

Feyzioglu³

et al. 2017

Turk. J. Fish. Aquat. Sci.

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Noctiluca scintillans reached the highest abundance (5105 ind/m 3 ) in April; and April was an important period in the Black Sea ecosystem because of the seasonal thermocline. While the relationship between temperature and abundance was important (P<0.05, r 2 =-0.8), the relationship was not important between salinity and abundance (P<0.05, r 2 =-0.06); and Chlorophyll-a (Chl-a) and abundance (P<0.05, r 2 =-0.2). It was determined that total lipid was 0.5% in wet weight (WW). It was shown that the main Saturated Fatty Acids (SFA) were 16:0 (24%) and 18:0 (6%), main M onounsaturated Fatty Acids (MUFA) were 18:1ω-9c (22%) and 16:1ω-7 (4%), main Polyunsaturated Fatty Acids (PUFA) were 18:2ω-6c (19%) and 20:4ω-6c (8%). Phytosterols were the most important sterols in N. scintillans; and stigmasterol was 60 µg/gr and β-sterol was 8µg/gr as the most important ones in phytosterols. α-tocopherol was the highest amount (10.8 µg/g) in lipophilic vitamins. It was found that M alondialdehyde (M DA) was 65 µg/g, total protein was 10 mg/g, Glutathione (GSH) was 10565 µg/g and GSSG) was 49 µg/g. Consequently, PUFA and α-tocopherol were the most important biochemical parameters and α-tocopherol may reduce toxicity in blooms of N. scintillans because of inhibitory effect of α-tocopherol on lipid oxidation. Additionally, we can say that N. scintillans is a resistant dinoflagellate against oxidative stress.

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“…10). Very high abundances occur at salinities between 22-33 ‰ and sometimes 10-15 ‰ (Kopuz et al, 2014). The blooms generated by N. scintillans are closely related to food availability, especially to the presence of diatoms, which it consumes, controlling the dynamics of this phytoplankton group.…”

Section: Resultsmentioning

confidence: 99%

The Assessment of the Mesozooplankton Community from the Romanian Black Sea Waters and the Relationship to Environmental Factors

Bișinicu¹,

Abaza²,

Cristea³

et al. 2021

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"The paper aims to develop and test a semi-quantitative method that generates scenarios for the zooplankton community development under salinity and nutrients fluctuations. First, we identified the relationships between the mesozooplankton component and the environmental factors by analyzing data (N=2566) collected within the warm season (May-September) of a decade (2008-2018). The biotic and abiotic parameters were investigated at 37 stations within the monitoring network of the Romanian Black Sea waters, covering all three marine reporting units (waters with variable salinity, coastal and marine) according to Marine Strategy Framework Directive (MSFD). We identified 32 mesozooplankton species belonging to ten taxonomic classes, copepods representing the bulk of the community. In waters with variable salinity and coastal waters, the fodder component of the mesozooplanktonic community was dominant, while in marine waters the nonfodder component was better and exclusively represented by Noctiluca scintillans. Physicochemical parameters that showed significant correlations with the mesozooplankton species were S (salinity) and nutrients - NO2- (nitrite), NO3-(nitrate), PO43-(phosphate) and NH4+(ammonium). The number of species significantly correlated with the physicochemical parameters showed variations generally correlated with the increasing salinity gradient: in waters with variable salinity nine species being correlated, in coastal waters ten species, and in marine waters five species. Key-Words: mesozooplankton, fodder, nonfodder, correlations, physicochemical "

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Cited by 17 publications

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Phytoplankton Blooms, Red Tides and Mucilaginous Aggregates in the Urban Thessaloniki Bay, Eastern Mediterranean

Phytoplankton Blooms, Red Tides and Mucilaginous Aggregates in the Urban Thessaloniki Bay, Eastern Mediterranean

Untitled

The Assessment of the Mesozooplankton Community from the Romanian Black Sea Waters and the Relationship to Environmental Factors

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