Coccolithophore Distribution in the Western Black Sea in the Summer of 2016
Coccolithophores are an important component of phytoplankton abundance and biomass in the brackish environments of the Black Sea. Here, the abundance, composition, and distribution of coccolithophores were investigated in water samples taken from the first 50 m at 18 stations in the western Black Se...
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MDPI AG
2023-12-01
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| Online-ссылка: | https://www.mdpi.com/1424-2818/15/12/1194 |
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| author | Margarita D. Dimiza Maria V. Triantaphyllou Alexandra Ravani Elisa Malinverno Boris T. Karatsolis Stella Psarra Aristomenis P. Karageorgis |
| author_facet | Margarita D. Dimiza Maria V. Triantaphyllou Alexandra Ravani Elisa Malinverno Boris T. Karatsolis Stella Psarra Aristomenis P. Karageorgis |
| author_sort | Margarita D. Dimiza |
| collection | DOAJ |
| description | Coccolithophores are an important component of phytoplankton abundance and biomass in the brackish environments of the Black Sea. Here, the abundance, composition, and distribution of coccolithophores were investigated in water samples taken from the first 50 m at 18 stations in the western Black Sea during a coccolithophore bloom, in June 2016. The total cell abundances ranged from 2 to 763 × 10<sup>4</sup> coccospheres L<sup>−1</sup>; <i>Emiliania huxleyi</i> was the most dominant species, but also <i>Syracosphaera</i> spp. (<i>S. dilatata</i> and <i>S. molischii</i>), <i>Acanthoica</i> (<i>A. acanthifera</i> and <i>A. quattrospina</i>), and <i>Algirosphaera robusta</i> displayed remarkably high concentrations. The formation of the seasonal thermocline significantly affects the vertical distribution of coccolithophores. <i>Emiliania huxleyi</i>, <i>Syracosphaera</i> spp., and <i>Acanthoica</i> spp. were restricted to the upper part of the water column, whereas high abundances of <i>Algirosphaera robusta</i> occurred below the thermocline. Overall, our results show significant differences in the vertical (ANOSIM R = 0.50, <i>p</i> = 0.0001) and spatial (ANOSIM R = 0.18, <i>p</i> = 0.0006) distribution of coccolithophores. Higher abundances of <i>E. huxleyi</i> and <i>Syracosphaera</i> spp. were recorded in the northwestern inner shelf region when compared to the open-sea samples. The observed coccolithophore spatial distribution is suggested to be mostly associated with the influx of less saline river water with high nutrient concentrations. |
| first_indexed | 2024-03-08T20:50:33Z |
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| id | doaj.art-365ee1906f474f2ba3c831b838728e9b |
| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-08T20:50:33Z |
| publishDate | 2023-12-01 |
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| series | Diversity |
| spelling | doaj.art-365ee1906f474f2ba3c831b838728e9b2023-12-22T14:03:47ZengMDPI AGDiversity1424-28182023-12-011512119410.3390/d15121194Coccolithophore Distribution in the Western Black Sea in the Summer of 2016Margarita D. Dimiza0Maria V. Triantaphyllou1Alexandra Ravani2Elisa Malinverno3Boris T. Karatsolis4Stella Psarra5Aristomenis P. Karageorgis6Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupolis, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupolis, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupolis, 15784 Athens, GreeceDepartment of Earth and Environmental Sciences, University of Milan—Bicocca, Piazza della Scienca 4, 20126 Milano, ItalyDepartment of Earth Sciences, Uppsala University, 752 36 Uppsala, SwedenHellenic Centre for Marine Research, Institute of Oceanography, 19013 Anavyssos, GreeceHellenic Centre for Marine Research, Institute of Oceanography, 19013 Anavyssos, GreeceCoccolithophores are an important component of phytoplankton abundance and biomass in the brackish environments of the Black Sea. Here, the abundance, composition, and distribution of coccolithophores were investigated in water samples taken from the first 50 m at 18 stations in the western Black Sea during a coccolithophore bloom, in June 2016. The total cell abundances ranged from 2 to 763 × 10<sup>4</sup> coccospheres L<sup>−1</sup>; <i>Emiliania huxleyi</i> was the most dominant species, but also <i>Syracosphaera</i> spp. (<i>S. dilatata</i> and <i>S. molischii</i>), <i>Acanthoica</i> (<i>A. acanthifera</i> and <i>A. quattrospina</i>), and <i>Algirosphaera robusta</i> displayed remarkably high concentrations. The formation of the seasonal thermocline significantly affects the vertical distribution of coccolithophores. <i>Emiliania huxleyi</i>, <i>Syracosphaera</i> spp., and <i>Acanthoica</i> spp. were restricted to the upper part of the water column, whereas high abundances of <i>Algirosphaera robusta</i> occurred below the thermocline. Overall, our results show significant differences in the vertical (ANOSIM R = 0.50, <i>p</i> = 0.0001) and spatial (ANOSIM R = 0.18, <i>p</i> = 0.0006) distribution of coccolithophores. Higher abundances of <i>E. huxleyi</i> and <i>Syracosphaera</i> spp. were recorded in the northwestern inner shelf region when compared to the open-sea samples. The observed coccolithophore spatial distribution is suggested to be mostly associated with the influx of less saline river water with high nutrient concentrations.https://www.mdpi.com/1424-2818/15/12/1194living coccolithophoressummer bloomsspecies composition |
| spellingShingle | Margarita D. Dimiza Maria V. Triantaphyllou Alexandra Ravani Elisa Malinverno Boris T. Karatsolis Stella Psarra Aristomenis P. Karageorgis Coccolithophore Distribution in the Western Black Sea in the Summer of 2016 Diversity living coccolithophores summer blooms species composition |
| title | Coccolithophore Distribution in the Western Black Sea in the Summer of 2016 |
| title_full | Coccolithophore Distribution in the Western Black Sea in the Summer of 2016 |
| title_fullStr | Coccolithophore Distribution in the Western Black Sea in the Summer of 2016 |
| title_full_unstemmed | Coccolithophore Distribution in the Western Black Sea in the Summer of 2016 |
| title_short | Coccolithophore Distribution in the Western Black Sea in the Summer of 2016 |
| title_sort | coccolithophore distribution in the western black sea in the summer of 2016 |
| topic | living coccolithophores summer blooms species composition |
| url | https://www.mdpi.com/1424-2818/15/12/1194 |
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