СЕЗОННА МІНЛИВІСТЬ ПОГЛИНАННЯ МІНЕРАЛЬНОГО ФОСФОРУ МІКРОПЛАНКТОНОМ В ГЛИБОКОВОДНІЙ ОБЛАСТІ ЧОРНОГО МОРЯ
The results of seasonal variability of uptake rate of inorganic phosphorus by microplankton (bacterium, phytoplankton) (Vm) and its turnover time (Т) within aerobic layer 0 – 100 m of deep-water area of the Black Sea have been analyzed. In upper mixed layer 0 – 40 m irrespectively of a season minera...
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| Date: | 2023 |
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| Main Author: | |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Marine Ecological Journal
2023
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| Subjects: | |
| Online Access: | https://mej.od.ua/index.php/mej/article/view/406 |
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| Journal Title: | Marine Ecological Journal |
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Marine Ecological Journal| Summary: | The results of seasonal variability of uptake rate of inorganic phosphorus by microplankton (bacterium, phytoplankton) (Vm) and its turnover time (Т) within aerobic layer 0 – 100 m of deep-water area of the Black Sea have been analyzed. In upper mixed layer 0 – 40 m irrespectively of a season mineral phosphorus uptake by microplankton was maximal, and in the layer 40 – 100 m it was reduced up to 13 % on the average in comparison with the upper layer. The character of change of parameters Vm and Т in the layer 0 – 40 m shows a decrease of microplankton metabolic activity from summer to winter. The estimation of contribution of different size fractions of microplankton in total uptake of phosphates has shown that in summer the key role belongs to picofraction, in winter - to nano- and microfractions of phytoplankton. The results allow not only quantitatively estimate seasonal variability of uptake rate of inorganic phosphorus and redistribution of this flow between bacteria and phytoplankton, but also to show the tendency of change of size structure of microplankton community. The mineral phosphorus availability in deep-water area of the Black Sea is discussed. |
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