СПОЖИВАННЯ І ЧАС ОБЕРТУ НЕОРГАНІЧНОГО ФОСФОРУ У ВОДАХ ЧОРНОГО МОРЯ В ОСІННІЙ ПЕРІОД

• Дата: 2023
• Автори: Пархоменко, О. В., Кірікова, М. В.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Marine Ecological Journal 2023
• Теми: Чорне море; неорганічний фосфор; швидкість; споживання; мікропланктон
• Онлайн доступ: https://mej.od.ua/index.php/mej/article/view/658
• Назва журналу: Marine Ecological Journal

The results of researches in uptake rate of inorganic phosphorus by microplancton (Vp) and its turnover time (Т) in Black Sea waters are considered. In the area of Crimean coast and north-western part of the sea the average values rate (Vp) in the upper mixed layer (UML) was recorded at 61·10-4, in open part of the sea it was 88·10-4 μM·h-1. Phosphates turnover time in UML at Crimean coast and open part of the sea varied from 0.26 up to 0.8 day, in north-western part it increased up to 1.5, under UML it was 16 – 180 days. Over autumn succession of phytoplankton community, the size fraction 0.4 - 20 μm was assigned as the main in phosphates uptake by microplankton, it constituted 97 %. On the basis of the data on flux ratio of inorganic carbon, nitrogen and phosphorus, the conclusion on the lack of limiting influence of inorganic phosphorus on phytoplankton growth and its development in the upper mixed layer over autumn season was made. The seasonal variations of parameters Vp and Т and contribution of different size fractions of microplankton in total uptake of phosphates are discussed. The character of change of uptake rate and time of turnover of phosphates shows the decrease of metabolic activity of microplankton from summer to winter.