Abstract
Purpose. Assessment of trophic status of the Dniester deltaic part lakes (Bile, Svine, Tudorovo and Putrino) in 2006-2017. Methods. Determination of hydrological, hydrochemical and hydrobiological characteristics of the lakes aquatic environment has been performed using standard methodologies. Three indicators of eutrophication have been used: chlorophyll a concentration, number of bacterioplankton, trophic indices TSI and TRIX. Results. Peculiarities of physicochemical characteristics of water in the Dniester deltaic lakes have been analysed. Increased nutrients concentration has been revealed in all the lakes during past 12 years. The lowest oxygen content and oxygen saturation was established in water of the Putrino Lake, where at the same time the highest concentrations of total nitrogen and phosphorus were observed. Analysis of long-term changes of chlorophyll a and bacterioplankton has been done. Based on the lakes integrated study in summer time of 2006-2017, assessment of water trophic state has been for the first time performed for each deltaic lake. Statistical interrelations between trophic state indicators and physicochemical characteristics of the lakes have been revealed. Conclusions. It was established that the assessment of four deltaic lakes trophic status based on chlorophyll a, bacterioplankton and TSI trophic index practically coincided and evidenced increased of the lakes’ trophic status and decrease of water quality in 2012-2017 compared with previous years. All the eutrophication indicators in water of the lakes Svine, Tudorovo and Putrino during six last years corresponded to hypertrophic status, while in the Bile Lake most of eutrophication indicators were lower and corresponded to eutrophic status. Trophic index TRIX, which was developed for seawater assessment, practically always showed somewhat higher trophic status of the lakes than other indicators.
Highlights
Based on the lakes integrated study in summer time of 20062017, assessment of water trophic state has been for the first time performed for each deltaic lake
It was established that the assessment of four deltaic lakes trophic status based on chlorophyll a, bacterioplankton and TSI trophic index practically coincided and evidenced increased of the lakes’ trophic status and decrease of water quality in 2012-2017 compared with previous years
All the eutrophication indicators in water of the lakes Svine, Tudorovo and Putrino during six last years corresponded to hypertrophic status, while in the Bile Lake most of eutrophication indicators were lower and corresponded to eutrophic status
Summary
Оцінка трофічного статусу вод озер дельтової частини Дністра (Біле, Свине, Тудорово і Путріно) в 2006-2017 рр. It was established that the assessment of four deltaic lakes trophic status based on chlorophyll a, bacterioplankton and TSI trophic index practically coincided and evidenced increased of the lakes’ trophic status and decrease of water quality in 2012-2017 compared with previous years. Однак за всі роки досліджень оцінка трофічного статусу дельтових озер не проводилася, хоча наявність та інтенсивність процесів евтрофікації у водоймах можна було ідентифікувати як за окремими простими показниками евтрофікації (хлорофіл а, бактеріопланктон, концентрації азоту і фосфору) [11, 12], так і за більш об’єктивними, але складними комплексними трофічними індексами TSI і TRIX [13, 14]. Метою нашого дослідження є оцінка трофічного статусу вод найбільших озер дельтової частини Дністра, таких як Біле, Свине, Тудорово і Путріно в 2006-2017 рр. Метою нашого дослідження є оцінка трофічного статусу вод найбільших озер дельтової частини Дністра, таких як Біле, Свине, Тудорово і Путріно в 2006-2017 рр. з використанням різних індикаторів та індексів евтрофікації
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
