Phytoplankton dynamics and Red Tides (1987-1997) in the Bulgarian Black Sea

1999 ◽  
Vol 39 (8) ◽  
pp. 27-36 ◽  
Author(s):  
Violeta Velikova ◽  
Snejana Moncheva ◽  
Daniela Petrova
Keyword(s):  
Time Series ◽  
Black Sea ◽  
Coastal Waters ◽  
Algal Biomass ◽  
Phytoplankton Community ◽  
Red Tides ◽  
Phytoplankton Dynamics ◽  
Phytoplankton Blooms ◽  
High Productivity ◽  
Open Sea

Time series of phytoplankton density, biomass and species composition in the Bulgarian Black Sea (specifically Varna Bay) are analysed. The main patterns of year-to-year fluctuations in the phytoplankton community controlled by natural and man-induced factors are discussed. Many indications lead to the conclusion that phytoplankton blooms have not become less frequent in comparison with the period of progressive eutrophication (1975-85), and there is a trend towards an increase in the number of blooming species involved. The community maintains the capacity to produce a lot of biomass. Areas of high productivity occur mainly in coastal waters. In open sea areas the level of algal biomass is higher than in the 80s. Irrespective of low silicate concentrations, in general the 90s are the period of diatom predomination.

scholarly journals Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nicole Trefault ◽  
Rodrigo De la Iglesia ◽  
Mario Moreno-Pino ◽  
Adriana Lopes dos Santos ◽  
Catherine Gérikas Ribeiro ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Coastal Waters ◽  
Phytoplankton Community ◽  
Rrna Gene ◽  
Phytoplankton Dynamics ◽  
The West ◽  
West Antarctic ◽  
Photosynthetic Eukaryotes ◽  
Phytoplankton Communities ◽  
West Antarctic Peninsula

AbstractYear-round reports of phytoplankton dynamics in the West Antarctic Peninsula are rare and mainly limited to microscopy and/or pigment-based studies. We analyzed the phytoplankton community from coastal waters of Fildes Bay in the West Antarctic Peninsula between January 2014 and 2015 using metabarcoding of the nuclear and plastidial 18/16S rRNA gene from both size-fractionated and flow cytometry sorted samples. Overall 14 classes of photosynthetic eukaryotes were present in our samples with the following dominating: Bacillariophyta (diatoms), Pelagophyceae and Dictyochophyceae for division Ochrophyta, Mamiellophyceae and Pyramimonadophyceae for division Chlorophyta, Haptophyta and Cryptophyta. Each metabarcoding approach yielded a different image of the phytoplankton community with for example Prymnesiophyceae more prevalent in plastidial metabarcodes and Mamiellophyceae in nuclear ones. Diatoms were dominant in the larger size fractions and during summer, while Prymnesiophyceae and Cryptophyceae were dominant in colder seasons. Pelagophyceae were particularly abundant towards the end of autumn (May). In addition of Micromonas polaris and Micromonas sp. clade B3, both previously reported in Arctic waters, we detected a new Micromonas 18S rRNA sequence signature, close to, but clearly distinct from M. polaris, which potentially represents a new clade specific of the Antarctic. These results highlight the need for complementary strategies as well as the importance of year-round monitoring for a comprehensive description of phytoplankton communities in Antarctic coastal waters.

scholarly journals Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

2020 ◽  
Author(s):  
Nicole Trefault ◽  
Rodrigo De la Iglesia ◽  
Mario Moreno-Pino ◽  
Adriana Lopes dos Santos ◽  
Catherine Gérikas Ribeiro ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Coastal Waters ◽  
Phytoplankton Community ◽  
Rrna Gene ◽  
Phytoplankton Dynamics ◽  
The West ◽  
West Antarctic ◽  
Photosynthetic Eukaryotes ◽  
Phytoplankton Communities ◽  
West Antarctic Peninsula

AbstractYear-round reports of phytoplankton dynamics in the West Antarctic Peninsula are rare and mainly limited to microscopy and/or pigment-based studies. We analyzed the phytoplankton community from coastal waters of Fildes Bay in the West Antarctic Peninsula between January 2014 and 2015 using metabarcoding of the nuclear and plastidial 18/16S rRNA gene from both size-fractionated and flow cytometry sorted samples. Each metabarcoding approach yielded a different image of the phytoplankton community with for example Prymnesiophyceae more prevalent in plastidial metabarcodes and Mamiellophyceae in nuclear ones. Overall 14 classes of photosynthetic eukaryotes were present in our samples with the following dominating: Bacillariophyta (diatoms), Pelagophyceae and Dictyochophyceae for division Ochrophyta, Mamiellophyceae and Pyramimonadophyceae for division Chlorophyta, Prymnesiophyceae and Cryptophyceae. Diatoms were dominant in the larger size fractions and during summer, while Prymnesiophyceae and Cryptophyceae were dominant in colder seasons. Pelagophyceae were particularly abundant towards the end of autumn (May). In addition of Micromonas polaris and Micromonas sp. clade B3, both previously reported in Arctic waters, we detected a new Micromonas 18S rRNA sequence signature, close to but clearly distinct from M. polaris, which potentially represent a new clade specific of the Antarctic. These results highlight the need for complementary strategies as well as the importance of year-round monitoring for a comprehensive description of phytoplankton communities in Antarctic coastal waters.

Condition of the Pelagic Fish Spawn in Coastal Waters of the Black Sea near Sevastopol

2004 ◽  
Vol 40 (3) ◽  
pp. 42-54 ◽  
Author(s):  
A. D. Gordina ◽  
V. G. Tsytsugina ◽  
Ye. I. Ovsyaniy ◽  
A. S. Romanov ◽  
R.B. Kemp
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
Pelagic Fish ◽  
The Black Sea ◽  
Fish Spawn

Regularities of Changes of the Bioluminescence Field in the Black Sea Coastal Waters

2013 ◽  
Vol 49 (3) ◽  
pp. 105-111 ◽  
Author(s):  
Ye. B. Mel'nikova ◽  
Yu. N. Tokarev ◽  
N. V. Burmistrova
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
The Black Sea
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