Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 19 ISSUE 2
Written by Ilie-Daniel RAICU, Ovidiu POPA1 Miruna VADUVA, Veronica PANAIT, Florentina IARIM, Oana PAUN, Narcisa BABEANU

This article presents the evolution of cyanobacterial abundance represented by Microcystis sp. and Aphanizomenon sp., in the period 2009-2017, on the river Arges, in Romania, as well as correlations with the temperatures and turbidities of water, in order to identify the impact of the actual climatic trends on the frequency and concentration of cyanobacteria. During this time interval it could be observed a change in the cyanobacterial blooming period by its moving in autumn, also the growth of its duration, but in the same time, a slight decrease a cyanovbacteria production during the whole year. The duration of cyanobacterial blooms season was positive correlated (+0.74) with the average annual temperature, and negative correlated (-0.71), with the turbidity in the season. The maximum concentration achieved by cyanobacteria showed negative correlation (-0.62) along with the turbidity recorded at the beginning of the cyanobacterial blooms season. Although temperature is a very important factor in cyanobacterial development in the Arges river, flood-induced turbidity plays a key role both in favoring or inhibiting its growth but also in adjusting temperatures.

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