Editorial Board

Editor-in-Chief: Petre Gastescu, Hyperion University of Bucharest (Romania)
Managing Editor: Petre Bretcan, Valahia University of Targoviste (Romania)
Volume 8(2) / 2014
ISSN: 1844-6477 (print version)
ISSN: 2284-5305 (electronic version)

 

 

  

 

PHYTOPLANKTON DIVERSITY IN THE OLTINA AND BUGEAC LAKES AND THEIR DEPENDENCY ON THE CLIMATIC CONDITIONS AND PHYSICO – CHEMICAL PARAMETERS

 

Camelia Eliza TELTEU1

1National Institute of Hydrology and Water Management, Bucharest, no.97, Bucuresti – Ploiesti street, Romania, postal code 013686, phone +40-21-3181115, Email: elizapascu25@gmail.com

Abstract

The present paper presents some issues about the phytoplankton diversity in the Oltina and Bugeac lakes and some relations, on the one hand, between the biological and the hydrochemical parameters, and on the other hand, between the biological and the climatic parameters. The Oltina and Bugeac lakes are located on the right side of the Danube River and are shallow lakes with freshwater important for the fish farming. The study is based on the statistical processing of the daily data regarding the phytoplankton species, some hydrochemical parameters and the lakes’ transparency values. The biological and the hydrochemical data was provided by the “Romanian Waters” National Administration, for the interval 2006 – 2008, and the lakes’ transparency values were estimated with the Secchi disk during summer 2011. In order to determine the links between the biological parameters and the climatic parameters we used the daily average air temperature and the daily precipitation from the Calarasi meteorological station (for the years 2006 – 2008, data from the ECA&D database), which is close to the studied lakes. The analysis highlights statistically significant correlation, for an error risk a with values between 0.1 and 0.02 (according to the Bravais – Pearson statistical test), between the biological parameters and the precipitation (10 days, 20 days and 30 days), some physico – chemical parameters. For both lakes, by applying the Redundancy Analysis (using the Canoco v4.5 software), we identified the statistically significant relations between the Cyanobacteria and Chlorophyta and the nitrates, a = 0.03, and between these and the pH, respectively the chlorides, a = 0.048. In the case of the Oltina Lake, the water temperature influences the growth of the Cyanobacteria and Chlorophyta in percent of 32.10%.

Keywords:Phytoplankton, Oltina Lake, Bugeac Lake, Statistics

  
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